FSCI Wiki - User contributions [en]

Poddery - Diaspora, Matrix and XMPP

2019-06-12T08:58:19Z

Noteness: /* Workers */

We run decentralized and federated [https://diasporafoundation.org/ Diaspora] social netowrk, [https://xmpp.org/ XMPP] and [https://matrix.org Matrix] instant messaging services at [https://poddery.com poddery.com]. Along with Diaspora, Poddery username and password can be used to access XMPP and Matrix services as well. [https://chat.poddery.com chat.poddery.com] provides Riot client (accessed by a web browser), which can be used to connect to any Matrix server without installing a Riot app/client.

= Environment =
== Hosting ==
Poddery is hosted at [https://www.hetzner.com Hetzner] with the following specs:

* Intel Xeon E3-1246V3 Process - 4 Cores, 3.5GHz
* 4TB HDD
* 32GB DDR3 RAM

== Operating System ==
* Debian Buster

== User Visible Services ==
=== Diaspora ===
* Currently installed version is 0.7.6.1 which is available in [https://packages.debian.org/buster/diaspora-installer Debian Buster contrib]
* For live statistics see https://poddery.com/statistics

=== Chat/XMPP ===
* [https://prosody.im/ Prosody] is used as the XMPP server which is modern and lightweight.
* Currently installed version is 0.11.2 which is available in [https://packages.debian.org/buster/prosody Debian Buster].
* All XEPs are enabled which the [https://conversations.im/ Conversations app] support.

=== Chat/Matrix ===
* [https://matrix.org/docs/projects/server/synapse.html Synapse] is used as the Matrix server.
* Synapse is currently installed directly from the [https://github.com/matrix-org/synapse official GitHub repo].
* Riot-web Matrix client is hosted at https://chat.poddery.com

=== Homepage ===
Homepage and other static pages are maintained in FSCI [https://git.fosscommunity.in GitLab instance].
* poddery.com -> https://git.fosscommunity.in/community/poddery.com
* save.poddery.com -> https://git.fosscommunity.in/community/save.poddery.com
* fund.poddery.com -> https://git.fosscommunity.in/community/fund-poddery

== Backend Services ==
=== Web Server / Reverse Proxy ===
* Nginx web server which also acts as front-end (reverse proxy) for Diaspora and Matrix.

=== Database ===
* PostgreSQL for Matrix
* MySQL for Diaspora

''TODO'': Consider migrating to PostgreSQL to optimize resources (We can reduce one service and RAM usage).

=== Email ===
* Exim

=== SSL/TLS certificates ===
* Let's Encrypt

=== Firewall ===
* UFW (Uncomplicated Firewall)

=== Intrusion Prevention ===
* Fail2ban

= Coordination =
* [https://www.loomio.org/g/2bjVXqAu/fosscommunity-in-poddery-com-maintainer-s-group Loomio group] - Mainly used for decision making
* Matrix room - [https://matrix.to/#/#poddery:poddery.com #poddery:poddery.com]
* [https://git.fosscommunity.in/community/poddery.com/issues Issue tracker] - Used for tracking progress of tasks

=== Contact ===
* Email: poddery at autistici.org (alias that reaches Akhilan, Abhijith Balan, Fayad, Balasankar, Julius, Praveen, Prasobh, Sruthi, Shirish, Vamsee and Manukrishnan)
* The following people have their GPG keys in the [[#Server_Access|access file]]:
** ID: 0xCE1F9C674512C22A - Praveen Arimbrathodiyil (piratepin)
** ID: 0xB77D2E2E23735427 - Balasankar C
** ID: 0x5D0064186AF037D9 - Manu Krishnan T V
** ID: 0x51C954405D432381 - Fayad Fami (fayad)
** ID: 0x863D4DF2ED9C28EF - Abhijith PA
** ID: 0x6EF48CCD865A1FFC - Syam G Krishnan (sgk)
** ID: 0xFD49D0BC6FEAECDA - Sagar Ippalpalli
** ID: 0x92FDAB42A95FF20C - Pirate Bady (piratesin)
** ID: 0x0B1955F40C691CCE - Kannan
** ID: 0x32FF6C6F5B7AE248 - Akhil Varkey
** ID: 0xFBB7061C27CB70C1 - Ranjith Siji
** ID: 0xEAAFE4A8F39DE34F - Kiran S Kunjumon (hacksk)
* It's recommended to setup [http://www.vim.org/scripts/script.php?script_id=3645 Vim GnuPG Plugin] for transparent editing. Those who are new to GPG can follow [https://www.madboa.com/geek/gpg-quickstart/ this guide].

=== Server Access ===
Maintained in a private git repo at https://git.fosscommunity.in/community/access

= Configuration and Maintenance =
== Disk Partitioning ==
* RAID 1 setup on 2x2TB HDDs (<code>sda</code> and <code>sdb</code>).
mdadm --verbose --create /dev/mdX --level=mirror --raid-devices=2 /dev/sdaY /dev/sdbY
* Separate partitions for swap (<code>md0</code> - 16GB), boot (<code>md1</code> - 512MB) and root (<code>md2</code> - 50GB).
* LVM on Luks for separate encrypted data partitions for database, static files and logs.
# Setup LUKS (make sure <code>lvm2</code>, <code>udev</code> and <code>cryptsetup</code> packages are installed).
cryptsetup luksFormat /dev/mdX
# Give disk encryption password as specified in the [[#Server_Access|access repo]]
cryptsetup luksOpen /dev/mdX poddery

# LVM Setup
# Create physical volume named <code>poddery</code>
pvcreate /dev/mapper/poddery
# Create volume group named <code>data</code>
vgcreate data /dev/mapper/poddery
# Create logical volumes named <code>log</code>, <code>db</code> and <code>static</code>
lvcreate -n log /dev/data -L 50G
lvcreate -n db /dev/data -L 500G
# Assign remaining free space for static files
lvcreate -n static /dev/data -l 100%FREE

# Setup filesystem on the logical volumes
mkfs.ext4 /dev/data/log
mkfs.ext4 /dev/data/db
mkfs.ext4 /dev/data/static

# Create directories for mounting the encrypted partitions
mkdir /var/lib/db /var/lib/static /var/log/poddery

# Manually mount encrypted partitions. This is needed on each reboot as Hetzner doesn't provide a web console so that we can't decrypt the partitions during booting.
mount /dev/data/db /var/lib/db
mount /dev/data/static /var/lib/static
mount /dev/data/log /var/log/poddery

== Hardening checklist ==
* SSH password based login disabled (allow only key based logins)
* SSH login disabled for root user (use a normal user with sudo)
# Check for the following settings in /etc/ssh/sshd_config:
...
PermitRootLogin no
...
PasswordAuthentication no
...

* <code>ufw</code> firewall enabled with only the ports that needs to be opened ([https://fxdata.cloud/tutorials/set-up-a-firewall-with-ufw-on-ubuntu-16-04 ufw tutorial]):
ufw default deny incoming
ufw default allow outgoing
ufw allow ssh
ufw allow http/tcp
ufw allow https/tcp
ufw allow Turnserver
ufw allow XMPP
ufw allow 8448

ufw enable

# Verify everything is setup properly
ufw status

# Enable ufw logging with default mode low
ufw logging on

* <code>fail2ban</code> configured against brute force attacks:
# Check for the following line <code>/etc/ssh/sshd_config</code>
...
LogLevel VERBOSE
...

# Restart SSH and enable fail2ban
systemctl restart ssh
systemctl enable fail2ban
systemctl start fail2ban

# To unban an IP, first check <code>/var/log/fail2ban.log</code> to get the banned IP and then run the following
# Here <code>sshd</code> is the defaut jail name, change it if you are using a different jail
fail2ban-client set sshd unbanip <banned_ip>

== Diaspora ==
* Install <code>diaspora-installer</code> from Debian Buster contrib:
apt install diaspora-installer

* Move MySQL data to encrypted partition:
# Make sure <code>/dev/data/db</code> is mounted to <code>/var/lib/db</code>
systemctl stop mysql
systemctl disable mysql
mv /var/lib/mysql /var/lib/db/
ln -s /var/lib/db/mysql /var/lib/
systemctl start mysql

* Move static files to encrypted partition:
# Make sure <code>/dev/data/static</code> is mounted to <code>/var/lib/static</code>
mkdir /var/lib/static/diaspora
mv /usr/share/diaspora/public/uploads /var/lib/static/diaspora
ln -s /var/lib/static/diaspora/uploads /usr/share/diaspora/public/
chown -R diaspora: /var/lib/static/diaspora

* Modify configuration files at <code>/etc/diaspora</code> and <code>/etc/diaspora.conf</code> as needed (backup of the current configuration files are available in the [[#Server_Access|access repo]]).
* Homepage configuration:
# Make sure <code>git</code> and <code>acl</code> packages are installed
# Grant <code>rwx</code> permissions for the ssh user to <code>/usr/share/diaspora/public</code>
setfacl -m "u:<ssh_user>:rwx" /usr/share/diaspora/public

# Clone poddery.com repo
cd /usr/share/diaspora/public
git clone https://git.fosscommunity.in/community/poddery.com.git
cd poddery.com && mv * .[^.]* .. #Give yes for all files when prompted
cd .. && rmdir poddery.com

* [https://save.poddery.com Save Poddery] repo is maintained as a sub module in poddery.com repo. See this [https://chrisjean.com/git-submodules-adding-using-removing-and-updating/ tutorial] for working with git submodules.
# Clone save.poddery.com repo
cd /usr/share/diaspora/public/save
git submodule init
git submodule update

== Matrix ==
* See the [https://github.com/matrix-org/synapse/blob/master/INSTALL.md official installation guide] of Synapse for installing from source.
* Nginx is used as reverse proxy to send requests that has <code>/_matrix/*</code> in URL to Synapse on port <code>8008</code>. This is configured in <code>/etc/nginx/sites-enabled/diaspora</code>.
* Shamil's [https://git.fosscommunity.in/necessary129/synapse-diaspora-auth Synapse Diaspora Auth] script is used to authenticate Synapse with Diaspora database.
* Move PostgreSQL data to encrypted partition:
# Make sure <code>/dev/data/db</code> is mounted to <code>/var/lib/db</code>
systemctl stop postgresql
systemctl disable postgresql
mv /var/lib/postgres /var/lib/db/
ln -s /var/lib/db/postgres /var/lib/
systemctl start postgresql

* Move static files to encrypted partition:
# Make sure <code>/dev/data/static</code> is mounted to <code>/var/lib/static</code>
mkdir /var/lib/static/synapse
mv /var/lib/matrix-synapse/uploads /var/lib/static/synapse/
ln -s /var/lib/static/synapse/uploads /var/lib/matrix-synapse/
mv /var/lib/matrix-synapse/media /var/lib/static/synapse/
ln -s /var/lib/static/synapse/media /var/lib/matrix-synapse/
chown -R matrix-synapse: /var/lib/static/synapse

* Install identity server <code>mxisd</code> (<code>deb</code> package available [https://github.com/kamax-matrix/mxisd/blob/master/docs/install/debian.md here])

=== Workers ===
* For scalability, Poddery is running [https://github.com/matrix-org/synapse/blob/master/docs/workers.rst workers]. Currently all workers specified in that page, expect <code>synapse.app.appservice</code> is running on poddery.com
* A new service [https://gist.github.com/necessary129/5dfbb140e4727496b0ad2bf801c10fdc <code>matrix-synapse@.service</code>] is installed for the workers (Save the <code>synape_worker</code> file somewhere like <code>/usr/local/bin/</code> or something).
* The worker config can be found at <code>/etc/matrix-synapse/workers</code>
* Synapse needs to be put under a reverse proxy see <code>/etc/nginx/sites-enabled/matrix</code>. A lot of <code>/_matrix/</code> urls needs to be overridden too see <code>/etc/nginx/sites-enabled/diaspora</code>
* These lines must be added to <code>homeserver.yaml</code> as we are running <code>media_repository</code>, <code>federation_sender</code>, <code>pusher</code>, <code>user_dir</code> workers respectively:
enable_media_repo: False
send_federation: False
start_pushers: False
update_user_directory: false

* These services must be enabled:

matrix-synapse@synchrotron.service matrix-synapse@federation_reader.service matrix-synapse@event_creator.service matrix-synapse@federation_sender.service matrix-synapse@pusher.service matrix-synapse@user_dir.service matrix-synapse@media_repository.service matrix-synapse@frontend_proxy.service matrix-synapse@client_reader.service matrix-synapse@synchrotron_2.service

To load balance between the 2 synchrotrons, We are running [https://github.com/Sorunome/matrix-synchrotron-balancer matrix-synchrotron-balancer]. It has a systemd file at <code>/etc/systemd/system/matrix-synchrotron-balancer</code>. The files are in <code>/opt/matrix-synchrotron-balancer</code>

=== Synapse Updation ===
* First check [https://github.com/matrix-org/synapse/blob/master/UPGRADE.rst synapse/UPGRADE.rst] to see if anything extra needs to be done. Then, just run <code>/root/upgrade-synapse</code>

=== Riot-web Updation ===
* Just run the following (make sure to replace <code><version></code> with a proper version number like <code>v1.0.0</code>):
/var/www/get-riot <version>

== Chat/XMPP ==
* Steps for setting up Prosody is given at https://wiki.debian.org/Diaspora/XMPP
# Follow steps 1 to 6 from https://wiki.debian.org/Diaspora/XMPP and then run the following:
mysql -u root -p # Enter password from the access repo

CREATE USER 'prosody'@'localhost' IDENTIFIED BY '<passwd_in_repo>';
GRANT ALL PRIVILEGES ON diaspora_production.* TO 'prosody'@'localhost';
FLUSH PRIVILEGES;

systemctl restart prosody

* Install plugins
# Make sure <code>mercurial</code> is installed
cd /etc && hg clone https://hg.prosody.im/prosody-modules/ prosody-modules

=== Set Nginx Conf for BOSH URLS ===
* Add the following in <code>nginx</code> configuration file to enable the BOSH URL to make JSXC Working:
upstream chat_cluster {
server localhost:5280;
}

location /http-bind {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-Forwarded-Proto https;
proxy_redirect off;
proxy_connect_timeout 5;
proxy_buffering off;
proxy_read_timeout 70;
keepalive_timeout 70;
send_timeout 70;
client_max_body_size 4M;
client_body_buffer_size 128K;
proxy_pass http://chat_cluster;
}

* [https://wiki.diasporafoundation.org/Integration/Chat#Nginx See here] for more details on <code>nginx</code> configuration. Alternatively, <code>apache</code> settings can be found [https://github.com/jsxc/jsxc/wiki/Prepare-apache here].

== TLS ==
* Install <code>letsencrypt</code>.
* Ensure proper permissions are set for <code>/etc/letsencrypt</code> and its contents.
chown -R root:ssl-cert /etc/letsencrypt
chmod g+r -R /etc/letsencrypt
chmod g+x /etc/letsencrypt/{archive,live}
* Generate certificates. For more details see https://certbot.eff.org.
* Make sure the certificates used by <code>diaspora</code> are symbolic links to letsencrypt default location:
ls -l /etc/diaspora/ssl
''total 0
''lrwxrwxrwx 1 root root 47 Apr 2 22:47 poddery.com-bundle.pem -> /etc/letsencrypt/live/poddery.com/fullchain.pem''
''lrwxrwxrwx 1 root root 45 Apr 2 22:48 poddery.com.key -> /etc/letsencrypt/live/poddery.com/privkey.pem''

# If you don't get the above output, then run the following:
cp -L /etc/letsencrypt/live/poddery.com/fullchain.pem /etc/diaspora/ssl/poddery.com-bundle.pem
cp -L /etc/letsencrypt/live/poddery.com/privkey.pem /etc/diaspora/ssl/poddery.com.key

* Make sure the certificates used by <code>prosody</code> are symbolic links to letsencrypt default location:
ls -l /etc/prosody/certs/
''total 0''
''lrwxrwxrwx 1 root root 40 Mar 28 01:16 poddery.com.crt -> /etc/letsencrypt/live/poddery.com/fullchain.pem''
''lrwxrwxrwx 1 root root 33 Mar 28 01:16 poddery.com.key -> /etc/letsencrypt/live/poddery.com/privkey.pem''

# If you don't get the above output, then run the following:
cp -L /etc/letsencrypt/live/poddery.com/fullchain.pem /etc/prosody/certs/poddery.com.crt
cp -L /etc/letsencrypt/live/poddery.com/privkey.pem /etc/prosody/certs/poddery.com.key

* Note- letsencrypt executable used below is actually a symlik to /usr/bin/certbot
* Cron jobs:
crontab -e
''30 2 * * 1 letsencrypt renew >> /var/log/le-renew.log''
''32 2 * * 1 /etc/init.d/nginx reload''
''34 2 * * 1 /etc/init.d/prosody reload''

* Manually updating TLS certificate:
letsencrypt certonly --webroot --agree-tos -w /usr/share/diaspora/public -d poddery.com -d www.poddery.com -d test.poddery.com -d groups.poddery.com -d fund.poddery.com -w /usr/share/diaspora/public/save -d save.poddery.com -w /var/www/riot -d chat.poddery.com
* To include an additional subdomain such as fund.poddery.com use with --expand parameter as shown below
letsencrypt certonly --webroot --agree-tos -w /usr/share/diaspora/public --expand -d poddery.com -d www.poddery.com -d test.poddery.com -d groups.poddery.com -d fund.poddery.com -w /usr/share/diaspora/public/save/ -d save.poddery.com -w /var/www/riot/ -d chat.poddery.com

= History =
* [[Poddery/Archive|See here]] for the archive of Poddery wiki page before the migration to Hetzner.

[[Category:Services]]

Poddery - Diaspora, Matrix and XMPP

2019-06-12T08:55:45Z

Noteness: Add synchrotron 2

We run decentralized and federated [https://diasporafoundation.org/ Diaspora] social netowrk, [https://xmpp.org/ XMPP] and [https://matrix.org Matrix] instant messaging services at [https://poddery.com poddery.com]. Along with Diaspora, Poddery username and password can be used to access XMPP and Matrix services as well. [https://chat.poddery.com chat.poddery.com] provides Riot client (accessed by a web browser), which can be used to connect to any Matrix server without installing a Riot app/client.

= Environment =
== Hosting ==
Poddery is hosted at [https://www.hetzner.com Hetzner] with the following specs:

* Intel Xeon E3-1246V3 Process - 4 Cores, 3.5GHz
* 4TB HDD
* 32GB DDR3 RAM

== Operating System ==
* Debian Buster

== User Visible Services ==
=== Diaspora ===
* Currently installed version is 0.7.6.1 which is available in [https://packages.debian.org/buster/diaspora-installer Debian Buster contrib]
* For live statistics see https://poddery.com/statistics

=== Chat/XMPP ===
* [https://prosody.im/ Prosody] is used as the XMPP server which is modern and lightweight.
* Currently installed version is 0.11.2 which is available in [https://packages.debian.org/buster/prosody Debian Buster].
* All XEPs are enabled which the [https://conversations.im/ Conversations app] support.

=== Chat/Matrix ===
* [https://matrix.org/docs/projects/server/synapse.html Synapse] is used as the Matrix server.
* Synapse is currently installed directly from the [https://github.com/matrix-org/synapse official GitHub repo].
* Riot-web Matrix client is hosted at https://chat.poddery.com

=== Homepage ===
Homepage and other static pages are maintained in FSCI [https://git.fosscommunity.in GitLab instance].
* poddery.com -> https://git.fosscommunity.in/community/poddery.com
* save.poddery.com -> https://git.fosscommunity.in/community/save.poddery.com
* fund.poddery.com -> https://git.fosscommunity.in/community/fund-poddery

== Backend Services ==
=== Web Server / Reverse Proxy ===
* Nginx web server which also acts as front-end (reverse proxy) for Diaspora and Matrix.

=== Database ===
* PostgreSQL for Matrix
* MySQL for Diaspora

''TODO'': Consider migrating to PostgreSQL to optimize resources (We can reduce one service and RAM usage).

=== Email ===
* Exim

=== SSL/TLS certificates ===
* Let's Encrypt

=== Firewall ===
* UFW (Uncomplicated Firewall)

=== Intrusion Prevention ===
* Fail2ban

= Coordination =
* [https://www.loomio.org/g/2bjVXqAu/fosscommunity-in-poddery-com-maintainer-s-group Loomio group] - Mainly used for decision making
* Matrix room - [https://matrix.to/#/#poddery:poddery.com #poddery:poddery.com]
* [https://git.fosscommunity.in/community/poddery.com/issues Issue tracker] - Used for tracking progress of tasks

=== Contact ===
* Email: poddery at autistici.org (alias that reaches Akhilan, Abhijith Balan, Fayad, Balasankar, Julius, Praveen, Prasobh, Sruthi, Shirish, Vamsee and Manukrishnan)
* The following people have their GPG keys in the [[#Server_Access|access file]]:
** ID: 0xCE1F9C674512C22A - Praveen Arimbrathodiyil (piratepin)
** ID: 0xB77D2E2E23735427 - Balasankar C
** ID: 0x5D0064186AF037D9 - Manu Krishnan T V
** ID: 0x51C954405D432381 - Fayad Fami (fayad)
** ID: 0x863D4DF2ED9C28EF - Abhijith PA
** ID: 0x6EF48CCD865A1FFC - Syam G Krishnan (sgk)
** ID: 0xFD49D0BC6FEAECDA - Sagar Ippalpalli
** ID: 0x92FDAB42A95FF20C - Pirate Bady (piratesin)
** ID: 0x0B1955F40C691CCE - Kannan
** ID: 0x32FF6C6F5B7AE248 - Akhil Varkey
** ID: 0xFBB7061C27CB70C1 - Ranjith Siji
** ID: 0xEAAFE4A8F39DE34F - Kiran S Kunjumon (hacksk)
* It's recommended to setup [http://www.vim.org/scripts/script.php?script_id=3645 Vim GnuPG Plugin] for transparent editing. Those who are new to GPG can follow [https://www.madboa.com/geek/gpg-quickstart/ this guide].

=== Server Access ===
Maintained in a private git repo at https://git.fosscommunity.in/community/access

= Configuration and Maintenance =
== Disk Partitioning ==
* RAID 1 setup on 2x2TB HDDs (<code>sda</code> and <code>sdb</code>).
mdadm --verbose --create /dev/mdX --level=mirror --raid-devices=2 /dev/sdaY /dev/sdbY
* Separate partitions for swap (<code>md0</code> - 16GB), boot (<code>md1</code> - 512MB) and root (<code>md2</code> - 50GB).
* LVM on Luks for separate encrypted data partitions for database, static files and logs.
# Setup LUKS (make sure <code>lvm2</code>, <code>udev</code> and <code>cryptsetup</code> packages are installed).
cryptsetup luksFormat /dev/mdX
# Give disk encryption password as specified in the [[#Server_Access|access repo]]
cryptsetup luksOpen /dev/mdX poddery

# LVM Setup
# Create physical volume named <code>poddery</code>
pvcreate /dev/mapper/poddery
# Create volume group named <code>data</code>
vgcreate data /dev/mapper/poddery
# Create logical volumes named <code>log</code>, <code>db</code> and <code>static</code>
lvcreate -n log /dev/data -L 50G
lvcreate -n db /dev/data -L 500G
# Assign remaining free space for static files
lvcreate -n static /dev/data -l 100%FREE

# Setup filesystem on the logical volumes
mkfs.ext4 /dev/data/log
mkfs.ext4 /dev/data/db
mkfs.ext4 /dev/data/static

# Create directories for mounting the encrypted partitions
mkdir /var/lib/db /var/lib/static /var/log/poddery

# Manually mount encrypted partitions. This is needed on each reboot as Hetzner doesn't provide a web console so that we can't decrypt the partitions during booting.
mount /dev/data/db /var/lib/db
mount /dev/data/static /var/lib/static
mount /dev/data/log /var/log/poddery

== Hardening checklist ==
* SSH password based login disabled (allow only key based logins)
* SSH login disabled for root user (use a normal user with sudo)
# Check for the following settings in /etc/ssh/sshd_config:
...
PermitRootLogin no
...
PasswordAuthentication no
...

* <code>ufw</code> firewall enabled with only the ports that needs to be opened ([https://fxdata.cloud/tutorials/set-up-a-firewall-with-ufw-on-ubuntu-16-04 ufw tutorial]):
ufw default deny incoming
ufw default allow outgoing
ufw allow ssh
ufw allow http/tcp
ufw allow https/tcp
ufw allow Turnserver
ufw allow XMPP
ufw allow 8448

ufw enable

# Verify everything is setup properly
ufw status

# Enable ufw logging with default mode low
ufw logging on

* <code>fail2ban</code> configured against brute force attacks:
# Check for the following line <code>/etc/ssh/sshd_config</code>
...
LogLevel VERBOSE
...

# Restart SSH and enable fail2ban
systemctl restart ssh
systemctl enable fail2ban
systemctl start fail2ban

# To unban an IP, first check <code>/var/log/fail2ban.log</code> to get the banned IP and then run the following
# Here <code>sshd</code> is the defaut jail name, change it if you are using a different jail
fail2ban-client set sshd unbanip <banned_ip>

== Diaspora ==
* Install <code>diaspora-installer</code> from Debian Buster contrib:
apt install diaspora-installer

* Move MySQL data to encrypted partition:
# Make sure <code>/dev/data/db</code> is mounted to <code>/var/lib/db</code>
systemctl stop mysql
systemctl disable mysql
mv /var/lib/mysql /var/lib/db/
ln -s /var/lib/db/mysql /var/lib/
systemctl start mysql

* Move static files to encrypted partition:
# Make sure <code>/dev/data/static</code> is mounted to <code>/var/lib/static</code>
mkdir /var/lib/static/diaspora
mv /usr/share/diaspora/public/uploads /var/lib/static/diaspora
ln -s /var/lib/static/diaspora/uploads /usr/share/diaspora/public/
chown -R diaspora: /var/lib/static/diaspora

* Modify configuration files at <code>/etc/diaspora</code> and <code>/etc/diaspora.conf</code> as needed (backup of the current configuration files are available in the [[#Server_Access|access repo]]).
* Homepage configuration:
# Make sure <code>git</code> and <code>acl</code> packages are installed
# Grant <code>rwx</code> permissions for the ssh user to <code>/usr/share/diaspora/public</code>
setfacl -m "u:<ssh_user>:rwx" /usr/share/diaspora/public

# Clone poddery.com repo
cd /usr/share/diaspora/public
git clone https://git.fosscommunity.in/community/poddery.com.git
cd poddery.com && mv * .[^.]* .. #Give yes for all files when prompted
cd .. && rmdir poddery.com

* [https://save.poddery.com Save Poddery] repo is maintained as a sub module in poddery.com repo. See this [https://chrisjean.com/git-submodules-adding-using-removing-and-updating/ tutorial] for working with git submodules.
# Clone save.poddery.com repo
cd /usr/share/diaspora/public/save
git submodule init
git submodule update

== Matrix ==
* See the [https://github.com/matrix-org/synapse/blob/master/INSTALL.md official installation guide] of Synapse for installing from source.
* Nginx is used as reverse proxy to send requests that has <code>/_matrix/*</code> in URL to Synapse on port <code>8008</code>. This is configured in <code>/etc/nginx/sites-enabled/diaspora</code>.
* Shamil's [https://git.fosscommunity.in/necessary129/synapse-diaspora-auth Synapse Diaspora Auth] script is used to authenticate Synapse with Diaspora database.
* Move PostgreSQL data to encrypted partition:
# Make sure <code>/dev/data/db</code> is mounted to <code>/var/lib/db</code>
systemctl stop postgresql
systemctl disable postgresql
mv /var/lib/postgres /var/lib/db/
ln -s /var/lib/db/postgres /var/lib/
systemctl start postgresql

* Move static files to encrypted partition:
# Make sure <code>/dev/data/static</code> is mounted to <code>/var/lib/static</code>
mkdir /var/lib/static/synapse
mv /var/lib/matrix-synapse/uploads /var/lib/static/synapse/
ln -s /var/lib/static/synapse/uploads /var/lib/matrix-synapse/
mv /var/lib/matrix-synapse/media /var/lib/static/synapse/
ln -s /var/lib/static/synapse/media /var/lib/matrix-synapse/
chown -R matrix-synapse: /var/lib/static/synapse

* Install identity server <code>mxisd</code> (<code>deb</code> package available [https://github.com/kamax-matrix/mxisd/blob/master/docs/install/debian.md here])

=== Workers ===
* For scalability, Poddery is running [https://github.com/matrix-org/synapse/blob/master/docs/workers.rst workers]. Currently all workers specified in that page, expect <code>synapse.app.appservice</code> is running on poddery.com
* A new service [https://gist.github.com/necessary129/5dfbb140e4727496b0ad2bf801c10fdc <code>matrix-synapse@.service</code>] is installed for the workers (Save the <code>synape_worker</code> file somewhere like <code>/usr/local/bin/</code> or something).
* The worker config can be found at <code>/etc/matrix-synapse/workers</code>
* Synapse needs to be put under a reverse proxy see <code>/etc/nginx/sites-enabled/matrix</code>. A lot of <code>/_matrix/</code> urls needs to be overridden too see <code>/etc/nginx/sites-enabled/diaspora</code>
* These lines must be added to <code>homeserver.yaml</code> as we are running <code>media_repository</code>, <code>federation_sender</code>, <code>pusher</code>, <code>user_dir</code> workers respectively:
enable_media_repo: False
send_federation: False
start_pushers: False
update_user_directory: false

* These services must be enabled:

matrix-synapse@synchrotron.service matrix-synapse@federation_reader.service matrix-synapse@event_creator.service matrix-synapse@federation_sender.service matrix-synapse@pusher.service matrix-synapse@user_dir.service matrix-synapse@media_repository.service matrix-synapse@frontend_proxy.service matrix-synapse@client_reader.service matrix-synapse@synchrotron_2.service

=== Synapse Updation ===
* First check [https://github.com/matrix-org/synapse/blob/master/UPGRADE.rst synapse/UPGRADE.rst] to see if anything extra needs to be done. Then, just run <code>/root/upgrade-synapse</code>

=== Riot-web Updation ===
* Just run the following (make sure to replace <code><version></code> with a proper version number like <code>v1.0.0</code>):
/var/www/get-riot <version>

== Chat/XMPP ==
* Steps for setting up Prosody is given at https://wiki.debian.org/Diaspora/XMPP
# Follow steps 1 to 6 from https://wiki.debian.org/Diaspora/XMPP and then run the following:
mysql -u root -p # Enter password from the access repo

CREATE USER 'prosody'@'localhost' IDENTIFIED BY '<passwd_in_repo>';
GRANT ALL PRIVILEGES ON diaspora_production.* TO 'prosody'@'localhost';
FLUSH PRIVILEGES;

systemctl restart prosody

* Install plugins
# Make sure <code>mercurial</code> is installed
cd /etc && hg clone https://hg.prosody.im/prosody-modules/ prosody-modules

=== Set Nginx Conf for BOSH URLS ===
* Add the following in <code>nginx</code> configuration file to enable the BOSH URL to make JSXC Working:
upstream chat_cluster {
server localhost:5280;
}

location /http-bind {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-Forwarded-Proto https;
proxy_redirect off;
proxy_connect_timeout 5;
proxy_buffering off;
proxy_read_timeout 70;
keepalive_timeout 70;
send_timeout 70;
client_max_body_size 4M;
client_body_buffer_size 128K;
proxy_pass http://chat_cluster;
}

* [https://wiki.diasporafoundation.org/Integration/Chat#Nginx See here] for more details on <code>nginx</code> configuration. Alternatively, <code>apache</code> settings can be found [https://github.com/jsxc/jsxc/wiki/Prepare-apache here].

== TLS ==
* Install <code>letsencrypt</code>.
* Ensure proper permissions are set for <code>/etc/letsencrypt</code> and its contents.
chown -R root:ssl-cert /etc/letsencrypt
chmod g+r -R /etc/letsencrypt
chmod g+x /etc/letsencrypt/{archive,live}
* Generate certificates. For more details see https://certbot.eff.org.
* Make sure the certificates used by <code>diaspora</code> are symbolic links to letsencrypt default location:
ls -l /etc/diaspora/ssl
''total 0
''lrwxrwxrwx 1 root root 47 Apr 2 22:47 poddery.com-bundle.pem -> /etc/letsencrypt/live/poddery.com/fullchain.pem''
''lrwxrwxrwx 1 root root 45 Apr 2 22:48 poddery.com.key -> /etc/letsencrypt/live/poddery.com/privkey.pem''

# If you don't get the above output, then run the following:
cp -L /etc/letsencrypt/live/poddery.com/fullchain.pem /etc/diaspora/ssl/poddery.com-bundle.pem
cp -L /etc/letsencrypt/live/poddery.com/privkey.pem /etc/diaspora/ssl/poddery.com.key

* Make sure the certificates used by <code>prosody</code> are symbolic links to letsencrypt default location:
ls -l /etc/prosody/certs/
''total 0''
''lrwxrwxrwx 1 root root 40 Mar 28 01:16 poddery.com.crt -> /etc/letsencrypt/live/poddery.com/fullchain.pem''
''lrwxrwxrwx 1 root root 33 Mar 28 01:16 poddery.com.key -> /etc/letsencrypt/live/poddery.com/privkey.pem''

# If you don't get the above output, then run the following:
cp -L /etc/letsencrypt/live/poddery.com/fullchain.pem /etc/prosody/certs/poddery.com.crt
cp -L /etc/letsencrypt/live/poddery.com/privkey.pem /etc/prosody/certs/poddery.com.key

* Note- letsencrypt executable used below is actually a symlik to /usr/bin/certbot
* Cron jobs:
crontab -e
''30 2 * * 1 letsencrypt renew >> /var/log/le-renew.log''
''32 2 * * 1 /etc/init.d/nginx reload''
''34 2 * * 1 /etc/init.d/prosody reload''

* Manually updating TLS certificate:
letsencrypt certonly --webroot --agree-tos -w /usr/share/diaspora/public -d poddery.com -d www.poddery.com -d test.poddery.com -d groups.poddery.com -d fund.poddery.com -w /usr/share/diaspora/public/save -d save.poddery.com -w /var/www/riot -d chat.poddery.com
* To include an additional subdomain such as fund.poddery.com use with --expand parameter as shown below
letsencrypt certonly --webroot --agree-tos -w /usr/share/diaspora/public --expand -d poddery.com -d www.poddery.com -d test.poddery.com -d groups.poddery.com -d fund.poddery.com -w /usr/share/diaspora/public/save/ -d save.poddery.com -w /var/www/riot/ -d chat.poddery.com

= History =
* [[Poddery/Archive|See here]] for the archive of Poddery wiki page before the migration to Hetzner.

[[Category:Services]]

Poddery - Diaspora, Matrix and XMPP

2019-04-16T17:48:21Z

Noteness: /* Upgrade */

We run Diaspora, XMPP and Matrix services at [https://poddery.com poddery.com]. Diaspora username and password can be used to access XMPP and Matrix services. [https://chat.poddery.com chat.poddery.com] provides Riot client (accessed by a web browser), which can be used to connect to any Matrix server without installing a Riot app/client.

= Environment =
== Hosting ==
We are on a [https://www.scaleway.com/baremetal-cloud-servers/ C2S instance of scaleway.com bare metal cloud server].

* 4 Dedicated x86 64bit Cores
* 8GB Memory
* 50GB SSD Disk
* 1 Flexible Public IPv4
* 300Mbit/s Unmetered bandwidth
* 2.5Gbit/s Internal bandwidth
* €11.99 Per Month

Due to performance issues we are migrating to a new server ([https://www.scaleway.com/baremetal-cloud-servers/ C2M instance of scaleway.com]) with the following specs:

* '''8''' Dedicated x86 64bit Cores
* '''16GB''' Memory
* 50GB SSD Disk
* 1 Flexible Public IPv4
* '''500Mbit/s''' Unmeterd bandwidth
* '''5Gbit/s''' Internal bandwidth
* '''€17.99''' Per Month
* Extra '''150GB''' SSD
* Total '''€20.99''' Per Month

== Operating System ==

We run Debian 9 Stretch image provided by Scaleway, with latest security updates applied.

=== Hardening checklist ===
* SSH password login disabled (allow only key based logins)
* root SSH login disabled (use a normal user with sudo)
'''/etc/ssh/sshd_config:'''
...
PermitRootLogin no
...
PasswordAuthentication no
...
* Firewall enabled with only the ports we need opened ([https://fxdata.cloud/tutorials/set-up-a-firewall-with-ufw-on-ubuntu-16-04 ufw tutorial])
sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw allow ssh
sudo ufw enable
Currently ufw is disabled as it is crashing the server.

* fail2ban configured against brute force attacks
'''/etc/ssh/sshd_config:'''
...
LogLevel VERBOSE
...

sudo systemctl restart ssh
sudo systemctl enable fail2ban
sudo systemctl start fail2ban

Check '''/var/log/fail2ban.log''' for logs

Unban an IP:
sudo fail2ban-client set sshd unbanip <banned_ip>

Here sshd is the defaut jail name, change it if you are using a different jail.

=== System health check ===

* Create partitions root, boot and swap.
* Setup RAID 1:
mdadm --verbose --create /dev/mdX --level=mirror --raid-devices=2 /dev/sdaY /dev/sdbY

* There should be a data disk attached (added from cloud.scaleway.com)
* The attached disk (/dev/nbdX) should be an lvm physical volume. We cannot use it directly for encryption, so we use lvm.
# Make sure '''lvm2''' and '''udev''' packages are installed
sudo apt-get install lvm2 udev

# Replace X with valid number according to '''lsblk'''
sudo pvcreate /dev/nbdX
* /dev/data is an lvm volume group created from /dev/nbdX
sudo vgcreate data /dev/nbdX
* /dev/data/diaspora is an lvm logical volume
sudo lvcreate -n log /dev/data -L <size_of_disk> # currently 50G
sudo lvcreate -n db /dev/data -L <size_of_disk> #currently 500G
sudo lvcreate -n diaspora /dev/data -l 100%FREE
* /dev/mapper/diaspora is an encrypted device
# Make sure '''cryptsetup''' package is installed
sudo apt-get install cryptsetup

# Give disk encryption password as specified in the [[#Server_Access|access repo]]
sudo cryptsetup luksFormat /dev/data/diaspora
sudo cryptsetup luksOpen /dev/data/diaspora diaspora
* /dev/mapper/diaspora is an ext4 file system
sudo mkfs.ext4 /dev/mapper/diaspora
* /var/lib/diaspora should be mounted. All [[#Handling_critical_data|critical data]] should be on /var/lib/diaspora.
sudo mkdir /var/lib/diaspora
sudo mount /dev/mapper/diaspora /var/lib/diaspora

== User Visible Services ==
=== Diaspora ===

* We use diaspora-installer-mysql package from https://people.debian.org/~praveen/diaspora/README
* See [https://salsa.debian.org/ruby-team/diaspora-installer/blob/debian/0.6.6.0+debian1/README /usr/share/doc/diaspora-common/README] for package specific configuration.
* [https://poddery.com/statistics live statistics]

=== Chat/XMPP ===

* We use Prosody and steps for setting up Prosody is given at -> https://wiki.debian.org/Diaspora/XMPP
# Follow steps 1 to 6 from https://wiki.debian.org/Diaspora/XMPP
sudo mysql -u root -p # Enter password from the access repo

CREATE USER 'prosody'@'localhost' IDENTIFIED BY '<passwd_in_repo>';
GRANT ALL PRIVILEGES ON diaspora_production.* TO 'prosody'@'localhost';
FLUSH PRIVILEGES;

sudo chown -R root:ssl-cert /etc/letsencrypt
sudo chmod g+r -R /etc/letsencrypt
sudo chmod g+x /etc/letsencrypt/{archive,live}

sudo systemctl restart prosody
* We have enabled all XEPs conversations expect. We use sslh to multiplex Diaspora and Prosody on port 443. See [https://wiki.debian.org/InstallingProsody#XMPP_over_HTTPS XMPP over HTTPS] section of the Installing Prosody article in Debian Wiki for sample sslh configuration.

==== Set Nginx Conf for BOSH URLS ====

* Add this configuration in nginx configuration file to enable the BOSH url to make JSXC Working.

'''Nginx'''

upstream chat_cluster {
server localhost:5280;
}

location /http-bind {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-Forwarded-Proto https;
proxy_redirect off;
proxy_connect_timeout 5;
proxy_buffering off;
proxy_read_timeout 70;
keepalive_timeout 70;
send_timeout 70;
client_max_body_size 4M;
client_body_buffer_size 128K;
proxy_pass http://chat_cluster;
}

Plz look [https://wiki.diasporafoundation.org/Integration/Chat#Nginx here] for more details. And apache settings [https://github.com/jsxc/jsxc/wiki/Prepare-apache here] :)

=== Chat/Matrix ===

* We use Synapse server for setting up the Matrix server.
* We will be using https://github.com/matrix-org/synapse/#synapse-installation for setting up this instance
* We use nginx reverse proxy to send requests that has ''/_matrix/*'' in url to synapse on 8008. See /etc/nginx/sites-enabled/diaspora
* We use https://git.fosscommunity.in/necessary129/synapse-diaspora-auth to authenticate synapse with Diaspora database

==== Workers ====

For scalability, we are running [https://github.com/matrix-org/synapse/blob/master/docs/workers.rst workers]. Currently all workers specified in that page, expect `synapse.app.appservice` is running on poddery.com

A new service [https://gist.github.com/necessary129/5dfbb140e4727496b0ad2bf801c10fdc <code>matrix-synapse@.service</code>] is installed for the workers. (Save the <code>synape_worker</code> file somewhere like <code>/usr/local/bin/</code> or something.)

The worker config can be found at <code>/etc/matrix-synapse/workers</code>

Synapse needs to be put under a reverse proxy see <code>/etc/nginx/sites-enabled/matrix</code>. A lot of <code>/_matrix/</code> urls needs to be overridden too see <code>/etc/nginx/sites-enabled/diaspora</code>

These lines must be added to <code>homeserver.yaml</code> as we are running <code>media_repository</code>, <code>federation_sender</code>, <code>pusher</code>, <code>user_dir</code> workers respectively:

enable_media_repo: False
send_federation: False
start_pushers: False
update_user_directory: false

These services must be enabled, and added to <code>Requires</code> and <code>Before</code> sections of the original <code>matrix-synapse.service</code>:
matrix-synapse@synchrotron.service matrix-synapse@federation_reader.service matrix-synapse@event_creator.service matrix-synapse@federation_sender.service matrix-synapse@pusher.service matrix-synapse@user_dir.service matrix-synapse@media_repository.service matrix-synapse@frontend_proxy.service matrix-synapse@client_reader.service

==== Upgrade ====

First check [https://github.com/matrix-org/synapse/blob/master/UPGRADE.rst synapse/UPGRADE.rst] to see if anything extra need to be done. Then, just run <code>/root/upgrade-synapse</code>

=== Homepage ===

Homepage and other static pages are maintained in our Gitlab instance. You can change it directly in the master branch or send pull requests. You can edit it via web as well.

* poddery.com -> https://git.fosscommunity.in/community/poddery.com
# Make sure '''git''' and '''acl''' packages are installed
sudo apt-get install git acl

# Grant rwx permissions for the ssh user to /usr/share/diaspora/public
sudo setfacl -m "u:<ssh_user>:rwx" /usr/share/diaspora/public

# Clone poddery.com repo
cd /usr/share/diaspora/public
git clone https://git.fosscommunity.in/community/poddery.com.git
cd poddery.com && mv * .[^.]* .. #Give yes for all files when prompted
cd .. && rmdir poddery.com

* save.poddery.com -> https://git.fosscommunity.in/community/save.poddery.com
cd /usr/share/diaspora/public/save
git submodule init
git submodule update
save.poddery.com repo is maintained as a sub module in poddery.com repo. See this tutorial -> https://chrisjean.com/git-submodules-adding-using-removing-and-updating/ for working with git submodules.

=== Riot-web Updation ===
https://chat.poddery.com/#/welcome
Backup current riot-web folder from riot to riot-backup
wget https://github.com/vector-im/riot-web/releases/download/v1.0.1/riot-v1.0.1.tar.gz
tar -xvf riot-v1.01.tar.gz
cp -r riot-v1.0.1/* /var/www/riot/
rm -rf ./riot-v1.0.1*
Transfer the old config.json,home.html,home-status.html from riot-backup to /var/www/riot/
systemctl restart nginx

== Backend Services ==
=== nginx ===

Front-end for Diaspora and Matrix.

=== PostgreSQL ===

Backend for Matrix.

=== MySQL ===

Backend for Diaspora.

'''TODO''': Consider migrating to PostgreSQL to optimize resources (We can reduce one service and RAM usage).

=== exim ===

For sending emails.
sudo dpkg-reconfigure exim4-config

=== sslh ===

Port multiplexer to allow XMPP and Diaspora to share 443 port. This allows us to fool stupid firewalls which blocks all ports except 80 and 443 (hence XMPP).

NOTE: This service has been disabled since the community decided that XMPP service no longer needs to be served via port 443, see this [https://www.loomio.org/d/xSiI8FGT/xmpp-service-on-port-443-and-sslh-complexity loomio post] for more details.

=== SSL/TLS certificates ===

# letsencrypt certonly --webroot -w /usr/share/diaspora/public -d poddery.com -d www.poddery.com -d test.poddery.com -d groups.poddery.com -w /usr/share/diaspora/public/save -d save.poddery.com -w /var/www/riot -d chat.poddery.com

# cp -L /etc/letsencrypt/live/poddery.com/fullchain.pem /etc/diaspora/ssl/poddery.com-bundle.pem
# cp -L /etc/letsencrypt/live/poddery.com/privkey.pem /etc/diaspora/ssl/poddery.com.key
# chown -R root:ssl-cert /etc/letsencrypt
# chmod g+r -R /etc/letsencrypt
# chmod g+x /etc/letsencrypt/*

Make sure the certificates used by prosody are symbolic links to letsencrypt default location.

# ls -l /etc/prosody/certs/
total 0
lrwxrwxrwx 1 root root 40 Mar 28 01:16 poddery.com.crt -> /etc/letsencrypt/live/poddery.com/fullchain.pem
lrwxrwxrwx 1 root root 33 Mar 28 01:16 poddery.com.key -> /etc/letsencrypt/live/poddery.com/privkey.pem

# crontab -e
30 2 * * 1 letsencrypt renew >> /var/log/le-renew.log
32 2 * * 1 /etc/init.d/nginx reload
34 2 * * 1 /etc/init.d/prosody reload

=== Handling critical data ===
sudo /etc/init.d/mysql stop
sudo mv /var/lib/mysql /var/lib/diaspora
sudo ln /var/lib/diaspora/mysql /var/lib/mysql
sudo mkdir /var/lib/diaspora/uploads
sudo chown -R diaspora: /var/lib/diaspora/uploads
sudo ln -s /var/lib/diaspora/uploads /usr/share/diaspora/public/uploads

=== Services health check ===

Sample output - Look for "Active: active (running)"

systemctl status nginx # Our web server front-end for Diaspora, XMPP and Matrix
nginx.service - A high performance web server and a reverse proxy server
Loaded: loaded (/lib/systemd/system/nginx.service; enabled)
Active: active (running) since Fri 2018-01-05 07:17:02 UTC; 4 weeks 1 days ago
Process: 5063 ExecStop=/sbin/start-stop-daemon --quiet --stop --retry QUIT/5 --pidfile /run/nginx.pid (code=exited, status=0/SUCCESS)
Process: 13140 ExecReload=/usr/sbin/nginx -g daemon on; master_process on; -s reload (code=exited, status=0/SUCCESS)
Process: 5071 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
Process: 5067 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
Main PID: 5072 (nginx)
CGroup: /system.slice/nginx.service
├─ 5072 nginx: master process /usr/sbin/nginx -g daemon on; master_process on;
├─13149 nginx: worker process
├─13150 nginx: worker process
├─13151 nginx: worker process
└─13153 nginx: worker process

systemctl status diaspora # Diaspora service
diaspora.service - LSB: Diaspora application server
Loaded: loaded (/etc/init.d/diaspora)
Active: active (running) since Fri 2018-01-05 07:21:29 UTC; 4 weeks 1 days ago
Process: 5146 ExecStop=/etc/init.d/diaspora stop (code=exited, status=0/SUCCESS)
Process: 5167 ExecStart=/etc/init.d/diaspora start (code=exited, status=0/SUCCESS)
CGroup: /system.slice/diaspora.service
├─ 850 unicorn worker[0] -c config/unicorn.rb -D
├─ 5174 sudo -u diaspora -E -H ./script/server
├─ 5175 eye monitoring v0.9.1 [diaspora] (in /usr/share/diaspora)
├─ 5211 sidekiq 4.2.9 diaspora [0 of 25 busy]
├─ 5222 unicorn master -c config/unicorn.rb -D
└─31717 unicorn worker[1] -c config/unicorn.rb -D

systemctl status matrix-synapse.service # Synapse Matrix Server
matrix-synapse.service - Synapse Matrix homeserver
Loaded: loaded (/lib/systemd/system/matrix-synapse.service; enabled)
Active: active (running) since Sat 2018-01-13 05:38:55 UTC; 3 weeks 1 days ago
Process: 15800 ExecStartPre=/var/lib/matrix-synapse/synapse/bin/python2.7 -m synapse.app.homeserver --config-path=/etc/matrix-synapse/homeserver.yaml --config-path=/etc/matrix-synapse/conf.d/ --generate-keys (code=exited, status=0/SUCCESS)
Main PID: 15808 (python2.7)
CGroup: /system.slice/matrix-synapse.service
└─15808 /var/lib/matrix-synapse/synapse/bin/python2.7 -m synapse.app.homeserver --config-path=/etc/matrix-synapse/homeserver.yaml --config-path=/etc/matrix-synapse/conf.d/

systemctl status prosody # Prosody XMPP Server
prosody.service - LSB: Prosody XMPP Server
Loaded: loaded (/etc/init.d/prosody)
Active: active (running) since Fri 2018-01-05 07:35:41 UTC; 4 weeks 1 days ago
Process: 6218 ExecStop=/etc/init.d/prosody stop (code=exited, status=0/SUCCESS)
Process: 6483 ExecReload=/etc/init.d/prosody reload (code=exited, status=0/SUCCESS)
Process: 6223 ExecStart=/etc/init.d/prosody start (code=exited, status=0/SUCCESS)
CGroup: /system.slice/prosody.service
└─6231 /usr/bin/lua5.1 /usr/bin/prosody

systemctl status sslh # SSL/SSH multiplexer which allow us to provide multiple services via 443 port (to bypass stupid firewalls)
sslh.service - SSL/SSH multiplexer
Loaded: loaded (/lib/systemd/system/sslh.service; enabled)
Active: active (running) since Fri 2018-01-05 07:29:27 UTC; 4 weeks 1 days ago
Docs: man:sslh(8)
Main PID: 5444 (sslh)
CGroup: /system.slice/sslh.service
├─ 713 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 830 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 1672 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 1673 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3514 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3875 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3876 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3896 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 4965 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5395 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5444 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5445 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5963 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 6617 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 6774 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 6957 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 7063 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 7083 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─25613 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
└─27481 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg

= Coordination =

*[https://www.loomio.org/g/2bjVXqAu/fosscommunity-in-poddery-com-maintainer-s-group loomio group] - we use this for decision making.
* Hangout with us in our Matrix room [https://matrix.to/#/#poddery:poddery.com #poddery:poddery.com]
* [https://git.fosscommunity.in/community/poddery.com/issues issue tracker] - we use this to track progress of tasks

=== Contact ===

Email: poddery at autistici.org (alias that reaches Akhilan, Abhijith Balan, Fayad, Balasankar, Julius, Praveen, Prasobh, Sruthi, Shirish, Vamsee and Manukrishnan)

The following people have their GPG keys in the password file.

Praveen Arimbrathodiyil (piratepin) (ID: 0xCE1F9C674512), Balasankar C (ID: 0x96EDAB9B2E6B7171), Manu Krishnan T V (ID: 0x5D0064186AF037D9), Fayad Fami (fayad) (ID: 0x51C954405D432381), Abhijith PA (ID: 0x863D4DF2ED9C28EF), Syam G Krishnan (sgk) (ID: 0x6EF48CCD865A1FFC), Sagar Ippalpalli (ID: 0xFD49D0BC6FEAECDA), Pirate Bady (piratesin) (ID: 0x92FDAB42A95FF20C), Kannan (ID: 0x0B1955F40C691CCE)

We recommend you setup [http://www.vim.org/scripts/script.php?script_id=3645 Vim GPG Plugin] for transparent editing. If you are new to GPG, then follow [https://www.madboa.com/geek/gpg-quickstart/ this guide].

=== Server Access ===

Maintained in a private git repo at -> https://git.fosscommunity.in/community/access

= Setting up Backup =

Backup was setup on a Scaleway C1 VPS (4 core ARM processor with 2GB RAM). '''TODO: C1 server was crashing frequently and we need to setup backup again on VPS provided by Manu'''.

Hostname (IP): backup.poddery.com (No public ip, access via scaleway.com web console). If you restart this machine, you may want to add poddery.com private ip in /etc/hosts

# apt-get install lvm2 cryptsetup

Directly creating luks volume on /dev/nbd1 is not working, so we use a logical volume

# pvcreate /dev/nbd1
# vgcreate data /dev/nbd1
# lvcreate -n diaspora -L 46.5G /dev/data

# cryptsetup luksFormat /dev/data/diaspora
# cryptsetup luksOpen /dev/data/diaspora diaspora

and update /etc/crypttab
# <target name> <source device> <key file> <options>
diaspora /dev/data/diaspora none luks

# mkfs.ext4 /dev/mapper/diaspora
# mkdir /var/lib/diaspora
and update /etc/fstab
# UNCONFIGURED FSTAB FOR BASE SYSTEM
/dev/mapper/diaspora /var/lib/diaspora ext4 defaults 0 2

# mount -a
# apt-get install mysql-server

Move MySQL data directory to encrypted volume
# /etc/init.d/mysql stop
# mv /var/lib/mysql /var/lib/diaspora/
# ln -s /var/lib/diaspora/mysql /var/lib/mysql

Follow steps in https://dev.mysql.com/doc/refman/5.5/en/replication-howto-masterbaseconfig.html for replication

Follow steps in https://www.howtoforge.com/how-to-set-up-mysql-database-replication-with-ssl-encryption-on-centos-5.4 for ssl (but ssl support is disabled in debian)

Follow steps in http://www.networkcomputing.com/storage/how-set-ssh-encrypted-mysql-replication/1111882674 to use ssh port forwarding to have encrypted replication

# adduser sshtunnel --disabled-login
# su sshtunnel

Generate SSH key pair and copy public key to target system
$ ssh-keygen -t rsa
$ ssh -f sshtunnel@poddery.com -L 7777:127.0.0.1:3306 -N

Test the connectivity
# mysql -u poddery_backup -p -P 7777 -h 127.0.0.1

Uploads are rsynced every hour

# crontab -e
# m h dom mon dow command
0 * * * * pgrep rsync || rsync -av --delete root@poddery.com:/var/lib/diaspora/uploads/ /var/lib/diaspora/uploads/ >/var/lib/diaspora/rsync-uploads.log

'''Note:''' Since we are not using a public ip (saves us money), backup.poddery.com connects to poddery.com via private ip. So if poddery.com is rebooted, the new ip address should be updated in /etc/hosts file of backup.poddery.com. To connect, use the web console from scaleway.com

= Add more disk space =

# Power off the machine with "ARCHIVE" option. It may take upto an hour for shutdown to complete on backup.poddery.com and poddery.com
# Add more disk from scaleway.com control panel . Volumes -> CREATE VOLUME
# Attach the newly created volume to server from Server page
# Power on the server
# Create physical volume (pvcreate /dev/nbdN)
# Expand volume group (vgextend data /dev/nbdN)
# Expand logical volume (lvresize --size=186G data/diaspora)
# Expand encrypted partition (cryptsetup resize diaspora)
# Resize file system (resize2fs /dev/mapper/diaspora)

= Maintenance history =
This section holds maintenance/issue history for future tracking.

'''When updating diaspora-installer-mysql packages, remember to recreate /usr/share/diaspora/public/uploads symlink to /var/lib/diaspora/uploads'''.

1. Prosody error - Failed to load private key

certmanager error SSL/TLS: Failed to load '/etc/letsencrypt/live/poddery.com/privkey.pem': Previous error (see logs), or other system error. (for poddery.com)
tls error Unable to initialize TLS: error loading private key (system lib)
certmanager error SSL/TLS: Failed to load '/etc/letsencrypt/live/poddery.com/privkey.pem': Check that the permissions allow Prosody to read this file.

This error is usually when ssl certificate in freshly installed or renewed. Prosody user is unable to access the key file due to lack of privileges.

Note that Poddery uses Letsencrypt for ssl.

Fix:

* Make sure that prosody user is in 'certs' group (this group may also be called ssl-certs as setup by Letencrypt)
* /etc/letsencrypt/ is the ssl directory.
* Prosody user should have permissions to all folders importantly archive and live folders in /etc/letsencrypt. Permissions to each folder must be 750.
* Troubleshoot by checking if you can switch to each folder in /etc/letsencrypt as prosody user and cat the files.

'''If replication fails, you can restart it following the instructions here'''

https://dba.stackexchange.com/questions/69394/mysql-replication-error-1594

[[Category:Services]]

Poddery - Diaspora, Matrix and XMPP

2019-03-27T09:33:25Z

Noteness: Synapse Upgrade

We run Diaspora, XMPP and Matrix services at [https://poddery.com poddery.com]. Diaspora username and password can be used to access XMPP and Matrix services. [https://chat.poddery.com chat.poddery.com] provides Riot client (accessed by a web browser), which can be used to connect to any Matrix server without installing a Riot app/client.

= Environment =
== Hosting ==
We are on a [https://www.scaleway.com/baremetal-cloud-servers/ C2S instance of scaleway.com bare metal cloud server].

* 4 Dedicated x86 64bit Cores
* 8GB Memory
* 50GB SSD Disk
* 1 Flexible Public IPv4
* 300Mbit/s Unmetered bandwidth
* 2.5Gbit/s Internal bandwidth
* €11.99 Per Month

Due to performance issues we are migrating to a new server ([https://www.scaleway.com/baremetal-cloud-servers/ C2M instance of scaleway.com]) with the following specs:

* '''8''' Dedicated x86 64bit Cores
* '''16GB''' Memory
* 50GB SSD Disk
* 1 Flexible Public IPv4
* '''500Mbit/s''' Unmeterd bandwidth
* '''5Gbit/s''' Internal bandwidth
* '''€17.99''' Per Month
* Extra '''150GB''' SSD
* Total '''€20.99''' Per Month

== Operating System ==

We run Debian 9 Stretch image provided by Scaleway, with latest security updates applied.

=== Hardening checklist ===
* SSH password login disabled (allow only key based logins)
* root SSH login disabled (use a normal user with sudo)
'''/etc/ssh/sshd_config:'''
...
PermitRootLogin no
...
PasswordAuthentication no
...
* Firewall enabled with only the ports we need opened ([https://fxdata.cloud/tutorials/set-up-a-firewall-with-ufw-on-ubuntu-16-04 ufw tutorial])
sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw allow ssh
sudo ufw enable
Currently ufw is disabled as it is crashing the server.

* fail2ban configured against brute force attacks
'''/etc/ssh/sshd_config:'''
...
LogLevel VERBOSE
...

sudo systemctl restart ssh
sudo systemctl enable fail2ban
sudo systemctl start fail2ban

Check '''/var/log/fail2ban.log''' for logs

Unban an IP:
sudo fail2ban-client set sshd unbanip <banned_ip>

Here sshd is the defaut jail name, change it if you are using a different jail.

=== System health check ===

* There should be a data disk attached (added from cloud.scaleway.com)
* The attached disk (/dev/nbdX) should be an lvm physical volume. We cannot use it directly for encryption, so we use lvm.
# Make sure '''lvm2''' and '''udev''' packages are installed
sudo apt-get install lvm2 udev

# Replace X with valid number according to '''lsblk'''
sudo pvcreate /dev/nbdX
* /dev/data is an lvm volume group created from /dev/nbdX
sudo vgcreate data /dev/nbdX
* /dev/data/diaspora is an lvm logical volume
sudo lvcreate -n diaspora /dev/data -L <size_of_disk>
* /dev/mapper/diaspora is an encrypted device
# Make sure '''cryptsetup''' package is installed
sudo apt-get install cryptsetup

# Give disk encryption password as specified in the [[#Server_Access|access repo]]
sudo cryptsetup luksFormat /dev/data/diaspora
sudo cryptsetup luksOpen /dev/data/diaspora diaspora
* /dev/mapper/diaspora is an ext4 file system
sudo mkfs.ext4 /dev/mapper/diaspora
* /var/lib/diaspora should be mounted. All [[#Handling_critical_data|critical data]] should be on /var/lib/diaspora.
sudo mkdir /var/lib/diaspora
sudo mount /dev/mapper/diaspora /var/lib/diaspora

== User Visible Services ==
=== Diaspora ===

* We use diaspora-installer-mysql package from https://people.debian.org/~praveen/diaspora/README
* See [https://salsa.debian.org/ruby-team/diaspora-installer/blob/debian/0.6.6.0+debian1/README /usr/share/doc/diaspora-common/README] for package specific configuration.
* [https://poddery.com/statistics live statistics]

=== Chat/XMPP ===

* We use Prosody and steps for setting up Prosody is given at -> https://wiki.debian.org/Diaspora/XMPP
# Follow steps 1 to 6 from https://wiki.debian.org/Diaspora/XMPP
sudo mysql -u root -p # Enter password from the access repo

CREATE USER 'prosody'@'localhost' IDENTIFIED BY '<passwd_in_repo>';
GRANT ALL PRIVILEGES ON diaspora_production.* TO 'prosody'@'localhost';
FLUSH PRIVILEGES;

sudo chown -R root:ssl-cert /etc/letsencrypt
sudo chmod g+r -R /etc/letsencrypt
sudo chmod g+x /etc/letsencrypt/{archive,live}

sudo systemctl restart prosody
* We have enabled all XEPs conversations expect. We use sslh to multiplex Diaspora and Prosody on port 443. See [https://wiki.debian.org/InstallingProsody#XMPP_over_HTTPS XMPP over HTTPS] section of the Installing Prosody article in Debian Wiki for sample sslh configuration.

==== Set Nginx Conf for BOSH URLS ====

* Add this configuration in nginx configuration file to enable the BOSH url to make JSXC Working.

'''Nginx'''

upstream chat_cluster {
server localhost:5280;
}

location /http-bind {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-Forwarded-Proto https;
proxy_redirect off;
proxy_connect_timeout 5;
proxy_buffering off;
proxy_read_timeout 70;
keepalive_timeout 70;
send_timeout 70;
client_max_body_size 4M;
client_body_buffer_size 128K;
proxy_pass http://chat_cluster;
}

Plz look [https://wiki.diasporafoundation.org/Integration/Chat#Nginx here] for more details. And apache settings [https://github.com/jsxc/jsxc/wiki/Prepare-apache here] :)

=== Chat/Matrix ===

* We use Synapse server for setting up the Matrix server.
* We will be using https://github.com/matrix-org/synapse/#synapse-installation for setting up this instance
* We use nginx reverse proxy to send requests that has ''/_matrix/*'' in url to synapse on 8008. See /etc/nginx/sites-enabled/diaspora
* We use https://git.fosscommunity.in/necessary129/synapse-diaspora-auth to authenticate synapse with Diaspora database

==== Workers ====

For scalability, we are running [https://github.com/matrix-org/synapse/blob/master/docs/workers.rst workers]. Currently all workers specified in that page, expect `synapse.app.appservice` is running on poddery.com

A new service [https://gist.github.com/necessary129/5dfbb140e4727496b0ad2bf801c10fdc <code>matrix-synapse@.service</code>] is installed for the workers. (Save the <code>synape_worker</code> file somewhere like <code>/usr/local/bin/</code> or something.)

The worker config can be found at <code>/etc/matrix-synapse/workers</code>

Synapse needs to be put under a reverse proxy see <code>/etc/nginx/sites-enabled/matrix</code>. A lot of <code>/_matrix/</code> urls needs to be overridden too see <code>/etc/nginx/sites-enabled/diaspora</code>

These lines must be added to <code>homeserver.yaml</code> as we are running <code>media_repository</code>, <code>federation_sender</code>, <code>pusher</code>, <code>user_dir</code> workers respectively:

enable_media_repo: False
send_federation: False
start_pushers: False
update_user_directory: false

These services must be enabled, and added to <code>Requires</code> and <code>Before</code> sections of the original <code>matrix-synapse.service</code>:
matrix-synapse@synchrotron.service matrix-synapse@federation_reader.service matrix-synapse@event_creator.service matrix-synapse@federation_sender.service matrix-synapse@pusher.service matrix-synapse@user_dir.service matrix-synapse@media_repository.service matrix-synapse@frontend_proxy.service matrix-synapse@client_reader.service

==== Upgrade ====

First check [https://github.com/matrix-org/synapse/blob/master/UPGRADE.rst synapse/UPGRADE.rst] to see if anything extra need to be done. Then, just run <code>/root/upgrade_synapse</code>

=== Homepage ===

Homepage and other static pages are maintained in our Gitlab instance. You can change it directly in the master branch or send pull requests. You can edit it via web as well.

* poddery.com -> https://git.fosscommunity.in/community/poddery.com
# Make sure '''git''' and '''acl''' packages are installed
sudo apt-get install git acl

# Grant rwx permissions for the ssh user to /usr/share/diaspora/public
sudo setfacl -m "u:<ssh_user>:rwx" /usr/share/diaspora/public

# Clone poddery.com repo
cd /usr/share/diaspora/public
git clone https://git.fosscommunity.in/community/poddery.com.git
cd poddery.com && mv * .[^.]* .. #Give yes for all files when prompted
cd .. && rmdir poddery.com

* save.poddery.com -> https://git.fosscommunity.in/community/save.poddery.com
cd /usr/share/diaspora/public/save
git submodule init
git submodule update
save.poddery.com repo is maintained as a sub module in poddery.com repo. See this tutorial -> https://chrisjean.com/git-submodules-adding-using-removing-and-updating/ for working with git submodules.

=== Riot-web Updation ===
https://chat.poddery.com/#/welcome
Backup current riot-web folder from riot to riot-backup
wget https://github.com/vector-im/riot-web/releases/download/v1.0.1/riot-v1.0.1.tar.gz
tar -xvf riot-v1.01.tar.gz
cp -r riot-v1.0.1/* /var/www/riot/
rm -rf ./riot-v1.0.1*
Transfer the old config.json,home.html,home-status.html from riot-backup to /var/www/riot/
systemctl restart nginx

== Backend Services ==
=== nginx ===

Front-end for Diaspora and Matrix.

=== PostgreSQL ===

Backend for Matrix.

=== MySQL ===

Backend for Diaspora.

'''TODO''': Consider migrating to PostgreSQL to optimize resources (We can reduce one service and RAM usage).

=== exim ===

For sending emails.
sudo dpkg-reconfigure exim4-config

=== sslh ===

Port multiplexer to allow XMPP and Diaspora to share 443 port. This allows us to fool stupid firewalls which blocks all ports except 80 and 443 (hence XMPP).

NOTE: This service has been disabled since the community decided that XMPP service no longer needs to be served via port 443, see this [https://www.loomio.org/d/xSiI8FGT/xmpp-service-on-port-443-and-sslh-complexity loomio post] for more details.

=== SSL/TLS certificates ===

# letsencrypt certonly --webroot -w /usr/share/diaspora/public -d poddery.com -d www.poddery.com -d test.poddery.com -d groups.poddery.com -w /usr/share/diaspora/public/save -d save.poddery.com -w /var/www/riot -d chat.poddery.com

# cp -L /etc/letsencrypt/live/poddery.com/fullchain.pem /etc/diaspora/ssl/poddery.com-bundle.pem
# cp -L /etc/letsencrypt/live/poddery.com/privkey.pem /etc/diaspora/ssl/poddery.com.key
# chown -R root:ssl-cert /etc/letsencrypt
# chmod g+r -R /etc/letsencrypt
# chmod g+x /etc/letsencrypt/*

Make sure the certificates used by prosody are symbolic links to letsencrypt default location.

# ls -l /etc/prosody/certs/
total 0
lrwxrwxrwx 1 root root 40 Mar 28 01:16 poddery.com.crt -> /etc/letsencrypt/live/poddery.com/fullchain.pem
lrwxrwxrwx 1 root root 33 Mar 28 01:16 poddery.com.key -> /etc/letsencrypt/live/poddery.com/privkey.pem

# crontab -e
30 2 * * 1 letsencrypt renew >> /var/log/le-renew.log
32 2 * * 1 /etc/init.d/nginx reload
34 2 * * 1 /etc/init.d/prosody reload

=== Handling critical data ===
sudo /etc/init.d/mysql stop
sudo mv /var/lib/mysql /var/lib/diaspora
sudo ln /var/lib/diaspora/mysql /var/lib/mysql
sudo mkdir /var/lib/diaspora/uploads
sudo chown -R diaspora: /var/lib/diaspora/uploads
sudo ln -s /var/lib/diaspora/uploads /usr/share/diaspora/public/uploads

=== Services health check ===

Sample output - Look for "Active: active (running)"

systemctl status nginx # Our web server front-end for Diaspora, XMPP and Matrix
nginx.service - A high performance web server and a reverse proxy server
Loaded: loaded (/lib/systemd/system/nginx.service; enabled)
Active: active (running) since Fri 2018-01-05 07:17:02 UTC; 4 weeks 1 days ago
Process: 5063 ExecStop=/sbin/start-stop-daemon --quiet --stop --retry QUIT/5 --pidfile /run/nginx.pid (code=exited, status=0/SUCCESS)
Process: 13140 ExecReload=/usr/sbin/nginx -g daemon on; master_process on; -s reload (code=exited, status=0/SUCCESS)
Process: 5071 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
Process: 5067 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
Main PID: 5072 (nginx)
CGroup: /system.slice/nginx.service
├─ 5072 nginx: master process /usr/sbin/nginx -g daemon on; master_process on;
├─13149 nginx: worker process
├─13150 nginx: worker process
├─13151 nginx: worker process
└─13153 nginx: worker process

systemctl status diaspora # Diaspora service
diaspora.service - LSB: Diaspora application server
Loaded: loaded (/etc/init.d/diaspora)
Active: active (running) since Fri 2018-01-05 07:21:29 UTC; 4 weeks 1 days ago
Process: 5146 ExecStop=/etc/init.d/diaspora stop (code=exited, status=0/SUCCESS)
Process: 5167 ExecStart=/etc/init.d/diaspora start (code=exited, status=0/SUCCESS)
CGroup: /system.slice/diaspora.service
├─ 850 unicorn worker[0] -c config/unicorn.rb -D
├─ 5174 sudo -u diaspora -E -H ./script/server
├─ 5175 eye monitoring v0.9.1 [diaspora] (in /usr/share/diaspora)
├─ 5211 sidekiq 4.2.9 diaspora [0 of 25 busy]
├─ 5222 unicorn master -c config/unicorn.rb -D
└─31717 unicorn worker[1] -c config/unicorn.rb -D

systemctl status matrix-synapse.service # Synapse Matrix Server
matrix-synapse.service - Synapse Matrix homeserver
Loaded: loaded (/lib/systemd/system/matrix-synapse.service; enabled)
Active: active (running) since Sat 2018-01-13 05:38:55 UTC; 3 weeks 1 days ago
Process: 15800 ExecStartPre=/var/lib/matrix-synapse/synapse/bin/python2.7 -m synapse.app.homeserver --config-path=/etc/matrix-synapse/homeserver.yaml --config-path=/etc/matrix-synapse/conf.d/ --generate-keys (code=exited, status=0/SUCCESS)
Main PID: 15808 (python2.7)
CGroup: /system.slice/matrix-synapse.service
└─15808 /var/lib/matrix-synapse/synapse/bin/python2.7 -m synapse.app.homeserver --config-path=/etc/matrix-synapse/homeserver.yaml --config-path=/etc/matrix-synapse/conf.d/

systemctl status prosody # Prosody XMPP Server
prosody.service - LSB: Prosody XMPP Server
Loaded: loaded (/etc/init.d/prosody)
Active: active (running) since Fri 2018-01-05 07:35:41 UTC; 4 weeks 1 days ago
Process: 6218 ExecStop=/etc/init.d/prosody stop (code=exited, status=0/SUCCESS)
Process: 6483 ExecReload=/etc/init.d/prosody reload (code=exited, status=0/SUCCESS)
Process: 6223 ExecStart=/etc/init.d/prosody start (code=exited, status=0/SUCCESS)
CGroup: /system.slice/prosody.service
└─6231 /usr/bin/lua5.1 /usr/bin/prosody

systemctl status sslh # SSL/SSH multiplexer which allow us to provide multiple services via 443 port (to bypass stupid firewalls)
sslh.service - SSL/SSH multiplexer
Loaded: loaded (/lib/systemd/system/sslh.service; enabled)
Active: active (running) since Fri 2018-01-05 07:29:27 UTC; 4 weeks 1 days ago
Docs: man:sslh(8)
Main PID: 5444 (sslh)
CGroup: /system.slice/sslh.service
├─ 713 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 830 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 1672 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 1673 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3514 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3875 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3876 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3896 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 4965 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5395 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5444 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5445 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5963 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 6617 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 6774 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 6957 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 7063 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 7083 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─25613 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
└─27481 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg

= Coordination =

*[https://www.loomio.org/g/2bjVXqAu/fosscommunity-in-poddery-com-maintainer-s-group loomio group] - we use this for decision making.
* Hangout with us in our Matrix room [https://matrix.to/#/#poddery:poddery.com #poddery:poddery.com]
* [https://git.fosscommunity.in/community/poddery.com/issues issue tracker] - we use this to track progress of tasks

=== Contact ===

Email: poddery at autistici.org (alias that reaches Akhilan, Abhijith Balan, Fayad, Balasankar, Julius, Praveen, Prasobh, Sruthi, Shirish, Vamsee and Manukrishnan)

The following people have their GPG keys in the password file.

Praveen Arimbrathodiyil (piratepin) (ID: 0xCE1F9C674512), Balasankar C (ID: 0x96EDAB9B2E6B7171), Manu Krishnan T V (ID: 0x5D0064186AF037D9), Fayad Fami (fayad) (ID: 0x51C954405D432381), Abhijith PA (ID: 0x863D4DF2ED9C28EF), Syam G Krishnan (sgk) (ID: 0x6EF48CCD865A1FFC), Sagar Ippalpalli (ID: 0xFD49D0BC6FEAECDA), Pirate Bady (piratesin) (ID: 0x92FDAB42A95FF20C), Kannan (ID: 0x0B1955F40C691CCE)

We recommend you setup [http://www.vim.org/scripts/script.php?script_id=3645 Vim GPG Plugin] for transparent editing. If you are new to GPG, then follow [https://www.madboa.com/geek/gpg-quickstart/ this guide].

=== Server Access ===

Maintained in a private git repo at -> https://git.fosscommunity.in/community/access

= Setting up Backup =

Backup was setup on a Scaleway C1 VPS (4 core ARM processor with 2GB RAM). '''TODO: C1 server was crashing frequently and we need to setup backup again on VPS provided by Manu'''.

Hostname (IP): backup.poddery.com (No public ip, access via scaleway.com web console). If you restart this machine, you may want to add poddery.com private ip in /etc/hosts

# apt-get install lvm2 cryptsetup

Directly creating luks volume on /dev/nbd1 is not working, so we use a logical volume

# pvcreate /dev/nbd1
# vgcreate data /dev/nbd1
# lvcreate -n diaspora -L 46.5G /dev/data

# cryptsetup luksFormat /dev/data/diaspora
# cryptsetup luksOpen /dev/data/diaspora diaspora

and update /etc/crypttab
# <target name> <source device> <key file> <options>
diaspora /dev/data/diaspora none luks

# mkfs.ext4 /dev/mapper/diaspora
# mkdir /var/lib/diaspora
and update /etc/fstab
# UNCONFIGURED FSTAB FOR BASE SYSTEM
/dev/mapper/diaspora /var/lib/diaspora ext4 defaults 0 2

# mount -a
# apt-get install mysql-server

Move MySQL data directory to encrypted volume
# /etc/init.d/mysql stop
# mv /var/lib/mysql /var/lib/diaspora/
# ln -s /var/lib/diaspora/mysql /var/lib/mysql

Follow steps in https://dev.mysql.com/doc/refman/5.5/en/replication-howto-masterbaseconfig.html for replication

Follow steps in https://www.howtoforge.com/how-to-set-up-mysql-database-replication-with-ssl-encryption-on-centos-5.4 for ssl (but ssl support is disabled in debian)

Follow steps in http://www.networkcomputing.com/storage/how-set-ssh-encrypted-mysql-replication/1111882674 to use ssh port forwarding to have encrypted replication

# adduser sshtunnel --disabled-login
# su sshtunnel

Generate SSH key pair and copy public key to target system
$ ssh-keygen -t rsa
$ ssh -f sshtunnel@poddery.com -L 7777:127.0.0.1:3306 -N

Test the connectivity
# mysql -u poddery_backup -p -P 7777 -h 127.0.0.1

Uploads are rsynced every hour

# crontab -e
# m h dom mon dow command
0 * * * * pgrep rsync || rsync -av --delete root@poddery.com:/var/lib/diaspora/uploads/ /var/lib/diaspora/uploads/ >/var/lib/diaspora/rsync-uploads.log

'''Note:''' Since we are not using a public ip (saves us money), backup.poddery.com connects to poddery.com via private ip. So if poddery.com is rebooted, the new ip address should be updated in /etc/hosts file of backup.poddery.com. To connect, use the web console from scaleway.com

= Add more disk space =

# Power off the machine with "ARCHIVE" option. It may take upto an hour for shutdown to complete on backup.poddery.com and poddery.com
# Add more disk from scaleway.com control panel . Volumes -> CREATE VOLUME
# Attach the newly created volume to server from Server page
# Power on the server
# Create physical volume (pvcreate /dev/nbdN)
# Expand volume group (vgextend data /dev/nbdN)
# Expand logical volume (lvresize --size=186G data/diaspora)
# Expand encrypted partition (cryptsetup resize diaspora)
# Resize file system (resize2fs /dev/mapper/diaspora)

= Maintenance history =
This section holds maintenance/issue history for future tracking.

'''When updating diaspora-installer-mysql packages, remember to recreate /usr/share/diaspora/public/uploads symlink to /var/lib/diaspora/uploads'''.

1. Prosody error - Failed to load private key

certmanager error SSL/TLS: Failed to load '/etc/letsencrypt/live/poddery.com/privkey.pem': Previous error (see logs), or other system error. (for poddery.com)
tls error Unable to initialize TLS: error loading private key (system lib)
certmanager error SSL/TLS: Failed to load '/etc/letsencrypt/live/poddery.com/privkey.pem': Check that the permissions allow Prosody to read this file.

This error is usually when ssl certificate in freshly installed or renewed. Prosody user is unable to access the key file due to lack of privileges.

Note that Poddery uses Letsencrypt for ssl.

Fix:

* Make sure that prosody user is in 'certs' group (this group may also be called ssl-certs as setup by Letencrypt)
* /etc/letsencrypt/ is the ssl directory.
* Prosody user should have permissions to all folders importantly archive and live folders in /etc/letsencrypt. Permissions to each folder must be 750.
* Troubleshoot by checking if you can switch to each folder in /etc/letsencrypt as prosody user and cat the files.

'''If replication fails, you can restart it following the instructions here'''

https://dba.stackexchange.com/questions/69394/mysql-replication-error-1594

[[Category:Services]]

About

2018-05-23T04:07:30Z

Noteness: Updated info

FOSS Community, India Wiki is started by [[User:Pravs|Praveen A]] to connect various disconnected FOSS Communities in India and co-ordinate FOSS related activities across India. It is maintained by the [[Special:Activeusers|active users]]. This wiki could play 'decentralised central resource' (index of active communities) as every one gets to fill in their parts and one could find all parts in one place.

Currently there is a [https://www.loomio.org/d/qjD9dBJW/documenting-teams-and-memberships proposal being discussed in our loomio group] to define basic principles of this collective and document new member process for sustainable teams.

FOSS stands for Free and Open Source Software.

The resource we manage/use include,

# Matrix room at [https://matrix.to/#/#fsci:poddery.com #fsci:poddery.com]
# A Wiki at wiki.fsci.org.in (this wiki)
# [[Email Lists |A mailing list]]
# IRC Channel #fsci at irc.oftc.net
# [https://www.loomio.org/g/esPoQ4S0/fosscommunity-in A loomio group]
# [[Poddery| A Diaspora pod/Matrix server at poddery.com]]

And a list of domains we manage are available [[Domains Managed|here]]

Poddery - Diaspora, Matrix and XMPP

2018-04-29T08:42:21Z

Noteness:

We run Diaspora, XMPP and Matrix services at [https://poddery.com poddery.com]. Diaspora username and password can be used to access XMPP and Matrix services. [https://chat.poddery.com chat.poddery.com] provides Riot client (accessed by a web browser), which can be used to connect to any Matrix server without installing a Riot app/client.

= Environment =
== Hosting ==
We are on a [https://www.scaleway.com/baremetal-cloud-servers/ C2S instance of scaleway.com bare metal cloud server].

* 4 Dedicated x86 64bit Cores
* 8GB Memory
* 50GB SSD Disk
* 1 Flexible Public IPv4
* 300Mbit/s Unmetered bandwidth
* 2.5Gbit/s Internal bandwidth
* €11.99 Per Month

Due to performance issues we are migrating to a new server ([https://www.scaleway.com/baremetal-cloud-servers/ C2M instance of scaleway.com]) with the following specs:

* '''8''' Dedicated x86 64bit Cores
* '''16GB''' Memory
* 50GB SSD Disk
* 1 Flexible Public IPv4
* '''500Mbit/s''' Unmeterd bandwidth
* '''5Gbit/s''' Internal bandwidth
* '''€17.99''' Per Month
* Extra '''150GB''' SSD
* Total '''€20.99''' Per Month

== Operating System ==

We run Debian 9 Stretch image provided by Scaleway, with latest security updates applied.

=== Hardening checklist ===
* SSH password login disabled (allow only key based logins)
* root SSH login disabled (use a normal user with sudo)
'''/etc/ssh/sshd_config:'''
...
PermitRootLogin no
...
PasswordAuthentication no
...
* Firewall enabled with only the ports we need opened ([https://fxdata.cloud/tutorials/set-up-a-firewall-with-ufw-on-ubuntu-16-04 ufw tutorial])
sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw allow ssh
sudo ufw enable
Currently ufw is disabled as it is crashing the server.

* fail2ban configured against brute force attacks
'''/etc/ssh/sshd_config:'''
...
LogLevel VERBOSE
...

sudo systemctl restart ssh
sudo systemctl enable fail2ban
sudo systemctl start fail2ban

Check '''/var/log/fail2ban.log''' for logs

Unban an IP:
sudo fail2ban-client set sshd unbanip <banned_ip>

Here sshd is the defaut jail name, change it if you are using a different jail.

=== System health check ===

* There should be a data disk attached (added from cloud.scaleway.com)
* The attached disk (/dev/nbdX) should be an lvm physical volume. We cannot use it directly for encryption, so we use lvm.
# Make sure '''lvm2''' and '''udev''' packages are installed
sudo apt-get install lvm2 udev

# Replace X with valid number according to '''lsblk'''
sudo pvcreate /dev/nbdX
* /dev/data is an lvm volume group created from /dev/nbdX
sudo vgcreate data /dev/nbdX
* /dev/data/diaspora is an lvm logical volume
sudo lvcreate -n diaspora /dev/data -L <size_of_disk>
* /dev/mapper/diaspora is an encrypted device
# Make sure '''cryptsetup''' package is installed
sudo apt-get install cryptsetup

# Give disk encryption password as specified in the [[#Server_Access|access repo]]
sudo cryptsetup luksFormat /dev/data/diaspora
sudo cryptsetup luksOpen /dev/data/diaspora diaspora
* /dev/mapper/diaspora is an ext4 file system
sudo mkfs.ext4 /dev/mapper/diaspora
* /var/lib/diaspora should be mounted. All [[#Handling_critical_data|critical data]] should be on /var/lib/diaspora.
sudo mkdir /var/lib/diaspora
sudo mount /dev/mapper/diaspora /var/lib/diaspora

== User Visible Services ==
=== Diaspora ===

* We use diaspora-installer-mysql package from https://people.debian.org/~praveen/diaspora/README
* See [https://salsa.debian.org/ruby-team/diaspora-installer/blob/debian/0.6.6.0+debian1/README /usr/share/doc/diaspora-common/README] for package specific configuration.
* [https://poddery.com/statistics live statistics]

=== Chat/XMPP ===

* We use Prosody and steps for setting up Prosody is given at -> https://wiki.debian.org/Diaspora/XMPP
# Follow steps 1 to 6 from https://wiki.debian.org/Diaspora/XMPP
sudo mysql -u root -p # Enter password from the access repo

CREATE USER 'prosody'@'localhost' IDENTIFIED BY '<passwd_in_repo>';
GRANT ALL PRIVILEGES ON diaspora_production.* TO 'prosody'@'localhost';
FLUSH PRIVILEGES;

sudo chown -R root:ssl-cert /etc/letsencrypt
sudo chmod g+r -R /etc/letsencrypt
sudo chmod g+x /etc/letsencrypt/{archive,live}

sudo systemctl restart prosody
* We have enabled all XEPs conversations expect. We use sslh to multiplex Diaspora and Prosody on port 443. See [https://wiki.debian.org/InstallingProsody#XMPP_over_HTTPS XMPP over HTTPS] section of the Installing Prosody article in Debian Wiki for sample sslh configuration.

==== Set Nginx Conf for BOSH URLS ====

* Add this configuration in nginx configuration file to enable the BOSH url to make JSXC Working.

'''Nginx'''

upstream chat_cluster {
server localhost:5280;
}

location /http-bind {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-Forwarded-Proto https;
proxy_redirect off;
proxy_connect_timeout 5;
proxy_buffering off;
proxy_read_timeout 70;
keepalive_timeout 70;
send_timeout 70;
client_max_body_size 4M;
client_body_buffer_size 128K;
proxy_pass http://chat_cluster;
}

Plz look [https://wiki.diasporafoundation.org/Integration/Chat#Nginx here] for more details. And apache settings [https://github.com/jsxc/jsxc/wiki/Prepare-apache here] :)

=== Chat/Matrix ===

* We use Synapse server for setting up the Matrix server.
* We will be using https://github.com/matrix-org/synapse/#synapse-installation for setting up this instance
* We use nginx reverse proxy to send requests that has ''/_matrix/*'' in url to synapse on 8008. See /etc/nginx/sites-enabled/diaspora
* We use https://git.fosscommunity.in/necessary129/synapse-diaspora-auth to authenticate synapse with Diaspora database

==== Workers ====

For scalability, we are running [https://github.com/matrix-org/synapse/blob/master/docs/workers.rst workers]. Currently all workers specified in that page, expect `synapse.app.appservice` is running on poddery.com

A new service [https://gist.github.com/necessary129/5dfbb140e4727496b0ad2bf801c10fdc <code>matrix-synapse@.service</code>] is installed for the workers. (Save the <code>synape_worker</code> file somewhere like <code>/usr/local/bin/</code> or something.)

The worker config can be found at <code>/etc/matrix-synapse/workers</code>

Synapse needs to be put under a reverse proxy see <code>/etc/nginx/sites-enabled/matrix</code>. A lot of <code>/_matrix/</code> urls needs to be overridden too see <code>/etc/nginx/sites-enabled/diaspora</code>

These lines must be added to <code>homeserver.yaml</code> as we are running <code>media_repository</code>, <code>federation_sender</code>, <code>pusher</code>, <code>user_dir</code> workers respectively:

enable_media_repo: False
send_federation: False
start_pushers: False
update_user_directory: false

These services must be enabled, and added to <code>Requires</code> and <code>Before</code> sections of the original <code>matrix-synapse.service</code>:
matrix-synapse@synchrotron.service matrix-synapse@federation_reader.service matrix-synapse@event_creator.service matrix-synapse@federation_sender.service matrix-synapse@pusher.service matrix-synapse@user_dir.service matrix-synapse@media_repository.service matrix-synapse@frontend_proxy.service matrix-synapse@client_reader.service

=== Homepage ===

Homepage and other static pages are maintained in our Gitlab instance. You can change it directly in the master branch or send pull requests. You can edit it via web as well.

* poddery.com -> https://git.fosscommunity.in/community/poddery.com
# Make sure '''git''' and '''acl''' packages are installed
sudo apt-get install git acl

# Grant rwx permissions for the ssh user to /usr/share/diaspora/public
sudo setfacl -m "u:<ssh_user>:rwx" /usr/share/diaspora/public

# Clone poddery.com repo
cd /usr/share/diaspora/public
git clone https://git.fosscommunity.in/community/poddery.com.git
cd poddery.com && mv * .[^.]* .. #Give yes for all files when prompted
cd .. && rmdir poddery.com

* save.poddery.com -> https://git.fosscommunity.in/community/save.poddery.com
cd /usr/share/diaspora/public/save
git submodule init
git submodule update
save.poddery.com repo is maintained as a sub module in poddery.com repo. See this tutorial -> https://chrisjean.com/git-submodules-adding-using-removing-and-updating/ for working with git submodules.

== Backend Services ==
=== nginx ===

Front-end for Diaspora and Matrix.

=== PostgreSQL ===

Backend for Matrix.

=== MySQL ===

Backend for Diaspora.

'''TODO''': Consider migrating to PostgreSQL to optimize resources (We can reduce one service and RAM usage).

=== exim ===

For sending emails.
sudo dpkg-reconfigure exim4-config

=== sslh ===

Port multiplexer to allow XMPP and Diaspora to share 443 port. This allows us to fool stupid firewalls which blocks all ports except 80 and 443 (hence XMPP).

=== SSL/TLS certificates ===

# letsencrypt certonly --webroot -w /usr/share/diaspora/public -d poddery.com -d www.poddery.com -d test.poddery.com -d groups.poddery.com -w /usr/share/diaspora/public/save -d save.poddery.com -w /var/www/riot -d chat.poddery.com

# cp -L /etc/letsencrypt/live/poddery.com/fullchain.pem /etc/diaspora/ssl/poddery.com-bundle.pem
# cp -L /etc/letsencrypt/live/poddery.com/privkey.pem /etc/diaspora/ssl/poddery.com.key
# chown -R root:ssl-cert /etc/letsencrypt
# chmod g+r -R /etc/letsencrypt
# chmod g+x /etc/letsencrypt/*

Make sure the certificates used by prosody are symbolic links to letsencrypt default location.

# ls -l /etc/prosody/certs/
total 0
lrwxrwxrwx 1 root root 40 Mar 28 01:16 poddery.com.crt -> /etc/letsencrypt/live/poddery.com/fullchain.pem
lrwxrwxrwx 1 root root 33 Mar 28 01:16 poddery.com.key -> /etc/letsencrypt/live/poddery.com/privkey.pem

# crontab -e
30 2 * * 1 letsencrypt renew >> /var/log/le-renew.log
32 2 * * 1 /etc/init.d/nginx reload
34 2 * * 1 /etc/init.d/prosody reload

=== Handling critical data ===
sudo /etc/init.d/mysql stop
sudo mv /var/lib/mysql /var/lib/diaspora
sudo ln /var/lib/diaspora/mysql /var/lib/mysql
sudo mkdir /var/lib/diaspora/uploads
sudo chown -R diaspora: /var/lib/diaspora/uploads
sudo ln -s /var/lib/diaspora/uploads /usr/share/diaspora/public/uploads

=== Services health check ===

Sample output - Look for "Active: active (running)"

systemctl status nginx # Our web server front-end for Diaspora, XMPP and Matrix
nginx.service - A high performance web server and a reverse proxy server
Loaded: loaded (/lib/systemd/system/nginx.service; enabled)
Active: active (running) since Fri 2018-01-05 07:17:02 UTC; 4 weeks 1 days ago
Process: 5063 ExecStop=/sbin/start-stop-daemon --quiet --stop --retry QUIT/5 --pidfile /run/nginx.pid (code=exited, status=0/SUCCESS)
Process: 13140 ExecReload=/usr/sbin/nginx -g daemon on; master_process on; -s reload (code=exited, status=0/SUCCESS)
Process: 5071 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
Process: 5067 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
Main PID: 5072 (nginx)
CGroup: /system.slice/nginx.service
├─ 5072 nginx: master process /usr/sbin/nginx -g daemon on; master_process on;
├─13149 nginx: worker process
├─13150 nginx: worker process
├─13151 nginx: worker process
└─13153 nginx: worker process

systemctl status diaspora # Diaspora service
diaspora.service - LSB: Diaspora application server
Loaded: loaded (/etc/init.d/diaspora)
Active: active (running) since Fri 2018-01-05 07:21:29 UTC; 4 weeks 1 days ago
Process: 5146 ExecStop=/etc/init.d/diaspora stop (code=exited, status=0/SUCCESS)
Process: 5167 ExecStart=/etc/init.d/diaspora start (code=exited, status=0/SUCCESS)
CGroup: /system.slice/diaspora.service
├─ 850 unicorn worker[0] -c config/unicorn.rb -D
├─ 5174 sudo -u diaspora -E -H ./script/server
├─ 5175 eye monitoring v0.9.1 [diaspora] (in /usr/share/diaspora)
├─ 5211 sidekiq 4.2.9 diaspora [0 of 25 busy]
├─ 5222 unicorn master -c config/unicorn.rb -D
└─31717 unicorn worker[1] -c config/unicorn.rb -D

systemctl status matrix-synapse.service # Synapse Matrix Server
matrix-synapse.service - Synapse Matrix homeserver
Loaded: loaded (/lib/systemd/system/matrix-synapse.service; enabled)
Active: active (running) since Sat 2018-01-13 05:38:55 UTC; 3 weeks 1 days ago
Process: 15800 ExecStartPre=/var/lib/matrix-synapse/synapse/bin/python2.7 -m synapse.app.homeserver --config-path=/etc/matrix-synapse/homeserver.yaml --config-path=/etc/matrix-synapse/conf.d/ --generate-keys (code=exited, status=0/SUCCESS)
Main PID: 15808 (python2.7)
CGroup: /system.slice/matrix-synapse.service
└─15808 /var/lib/matrix-synapse/synapse/bin/python2.7 -m synapse.app.homeserver --config-path=/etc/matrix-synapse/homeserver.yaml --config-path=/etc/matrix-synapse/conf.d/

systemctl status prosody # Prosody XMPP Server
prosody.service - LSB: Prosody XMPP Server
Loaded: loaded (/etc/init.d/prosody)
Active: active (running) since Fri 2018-01-05 07:35:41 UTC; 4 weeks 1 days ago
Process: 6218 ExecStop=/etc/init.d/prosody stop (code=exited, status=0/SUCCESS)
Process: 6483 ExecReload=/etc/init.d/prosody reload (code=exited, status=0/SUCCESS)
Process: 6223 ExecStart=/etc/init.d/prosody start (code=exited, status=0/SUCCESS)
CGroup: /system.slice/prosody.service
└─6231 /usr/bin/lua5.1 /usr/bin/prosody

systemctl status sslh # SSL/SSH multiplexer which allow us to provide multiple services via 443 port (to bypass stupid firewalls)
sslh.service - SSL/SSH multiplexer
Loaded: loaded (/lib/systemd/system/sslh.service; enabled)
Active: active (running) since Fri 2018-01-05 07:29:27 UTC; 4 weeks 1 days ago
Docs: man:sslh(8)
Main PID: 5444 (sslh)
CGroup: /system.slice/sslh.service
├─ 713 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 830 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 1672 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 1673 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3514 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3875 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3876 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3896 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 4965 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5395 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5444 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5445 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5963 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 6617 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 6774 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 6957 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 7063 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 7083 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─25613 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
└─27481 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg

= Coordination =

*[https://www.loomio.org/g/2bjVXqAu/fosscommunity-in-poddery-com-maintainer-s-group loomio group] - we use this for decision making.
* Hangout with us in our Matrix room [https://matrix.to/#/#poddery:poddery.com #poddery:poddery.com]
* [https://git.fosscommunity.in/community/poddery.com/issues issue tracker] - we use this to track progress of tasks

=== Contact ===

Email: poddery at autistici.org (alias that reaches Akhilan, Abhijith Balan, Fayad, Balasankar, Julius, Praveen, Prasobh, Sruthi, Shirish, Vamsee and Manukrishnan)

The following people have their GPG keys in the password file.

Praveen Arimbrathodiyil (piratepin) (ID: 0xCE1F9C674512), Balasankar C (ID: 0x96EDAB9B2E6B7171), Manu Krishnan T V (ID: 0x5D0064186AF037D9), Fayad Fami (fayad) (ID: 0x51C954405D432381), Abhijith PA (ID: 0x863D4DF2ED9C28EF), Syam G Krishnan (sgk) (ID: 0x6EF48CCD865A1FFC), Sagar Ippalpalli (ID: 0xFD49D0BC6FEAECDA), Pirate Bady (piratesin) (ID: 0x92FDAB42A95FF20C), Kannan (ID: 0x0B1955F40C691CCE)

We recommend you setup [http://www.vim.org/scripts/script.php?script_id=3645 Vim GPG Plugin] for transparent editing. If you are new to GPG, then follow [https://www.madboa.com/geek/gpg-quickstart/ this guide].

=== Server Access ===

Maintained in a private git repo at -> https://git.fosscommunity.in/community/access

= Setting up Backup =

Backup was setup on a Scaleway C1 VPS (4 core ARM processor with 2GB RAM). '''TODO: C1 server was crashing frequently and we need to setup backup again on VPS provided by Manu'''.

Hostname (IP): backup.poddery.com (No public ip, access via scaleway.com web console). If you restart this machine, you may want to add poddery.com private ip in /etc/hosts

# apt-get install lvm2 cryptsetup

Directly creating luks volume on /dev/nbd1 is not working, so we use a logical volume

# pvcreate /dev/nbd1
# vgcreate data /dev/nbd1
# lvcreate -n diaspora -L 46.5G /dev/data

# cryptsetup luksFormat /dev/data/diaspora
# cryptsetup luksOpen /dev/data/diaspora diaspora

and update /etc/crypttab
# <target name> <source device> <key file> <options>
diaspora /dev/data/diaspora none luks

# mkfs.ext4 /dev/mapper/diaspora
# mkdir /var/lib/diaspora
and update /etc/fstab
# UNCONFIGURED FSTAB FOR BASE SYSTEM
/dev/mapper/diaspora /var/lib/diaspora ext4 defaults 0 2

# mount -a
# apt-get install mysql-server

Move MySQL data directory to encrypted volume
# /etc/init.d/mysql stop
# mv /var/lib/mysql /var/lib/diaspora/
# ln -s /var/lib/diaspora/mysql /var/lib/mysql

Follow steps in https://dev.mysql.com/doc/refman/5.5/en/replication-howto-masterbaseconfig.html for replication

Follow steps in https://www.howtoforge.com/how-to-set-up-mysql-database-replication-with-ssl-encryption-on-centos-5.4 for ssl (but ssl support is disabled in debian)

Follow steps in http://www.networkcomputing.com/storage/how-set-ssh-encrypted-mysql-replication/1111882674 to use ssh port forwarding to have encrypted replication

# adduser sshtunnel --disabled-login
# su sshtunnel

Generate SSH key pair and copy public key to target system
$ ssh-keygen -t rsa
$ ssh -f sshtunnel@poddery.com -L 7777:127.0.0.1:3306 -N

Test the connectivity
# mysql -u poddery_backup -p -P 7777 -h 127.0.0.1

Uploads are rsynced every hour

# crontab -e
# m h dom mon dow command
0 * * * * pgrep rsync || rsync -av --delete root@poddery.com:/var/lib/diaspora/uploads/ /var/lib/diaspora/uploads/ >/var/lib/diaspora/rsync-uploads.log

'''Note:''' Since we are not using a public ip (saves us money), backup.poddery.com connects to poddery.com via private ip. So if poddery.com is rebooted, the new ip address should be updated in /etc/hosts file of backup.poddery.com. To connect, use the web console from scaleway.com

= Add more disk space =

# Power off the machine with "ARCHIVE" option. It may take upto an hour for shutdown to complete on backup.poddery.com and poddery.com
# Add more disk from scaleway.com control panel . Volumes -> CREATE VOLUME
# Attach the newly created volume to server from Server page
# Power on the server
# Create physical volume (pvcreate /dev/nbdN)
# Expand volume group (vgextend data /dev/nbdN)
# Expand logical volume (lvresize --size=186G data/diaspora)
# Expand encrypted partition (cryptsetup resize diaspora)
# Resize file system (resize2fs /dev/mapper/diaspora)

= Maintenance history =
This section holds maintenance/issue history for future tracking.

'''When updating diaspora-installer-mysql packages, remember to recreate /usr/share/diaspora/public/uploads symlink to /var/lib/diaspora/uploads'''.

1. Prosody error - Failed to load private key

certmanager error SSL/TLS: Failed to load '/etc/letsencrypt/live/poddery.com/privkey.pem': Previous error (see logs), or other system error. (for poddery.com)
tls error Unable to initialize TLS: error loading private key (system lib)
certmanager error SSL/TLS: Failed to load '/etc/letsencrypt/live/poddery.com/privkey.pem': Check that the permissions allow Prosody to read this file.

This error is usually when ssl certificate in freshly installed or renewed. Prosody user is unable to access the key file due to lack of privileges.

Note that Poddery uses Letsencrypt for ssl.

Fix:

* Make sure that prosody user is in 'certs' group (this group may also be called ssl-certs as setup by Letencrypt)
* /etc/letsencrypt/ is the ssl directory.
* Prosody user should have permissions to all folders importantly archive and live folders in /etc/letsencrypt. Permissions to each folder must be 750.
* Troubleshoot by checking if you can switch to each folder in /etc/letsencrypt as prosody user and cat the files.

'''If replication fails, you can restart it following the instructions here'''

https://dba.stackexchange.com/questions/69394/mysql-replication-error-1594

[[Category:Services]]

Poddery - Diaspora, Matrix and XMPP

2018-04-17T14:14:00Z

Noteness:

We run Diaspora, XMPP and Matrix services at [https://poddery.com poddery.com]. Diaspora username and password can be used to access XMPP and Matrix services. [https://chat.poddery.com chat.poddery.com] provides Riot client (accessed by a web browser), which can be used to connect to any Matrix server without installing a Riot app/client.

= Environment =
== Hosting ==
We are on a [https://www.scaleway.com/baremetal-cloud-servers/ C2S instance of scaleway.com bare metal cloud server].

* 4 Dedicated x86 64bit Cores
* 8GB Memory
* 50GB SSD Disk
* 1 Flexible Public IPv4
* 300Mbit/s Unmetered bandwidth
* 2.5Gbit/s Internal bandwidth
* €11.99 Per Month

Due to performance issues we are migrating to a new server ([https://www.scaleway.com/baremetal-cloud-servers/ C2M instance of scaleway.com]) with the following specs:

* '''8''' Dedicated x86 64bit Cores
* '''16GB''' Memory
* 50GB SSD Disk
* 1 Flexible Public IPv4
* '''500Mbit/s''' Unmeterd bandwidth
* '''5Gbit/s''' Internal bandwidth
* '''€17.99''' Per Month
* Extra '''150GB''' SSD
* Total '''€20.99''' Per Month

== Operating System ==

We run Debian 9 Stretch image provided by Scaleway, with latest security updates applied.

=== Hardening checklist ===
* SSH password login disabled (allow only key based logins)
* root SSH login disabled (use a normal user with sudo)
'''/etc/ssh/sshd_config:'''
...
PermitRootLogin no
...
PasswordAuthentication no
...
* Firewall enabled with only the ports we need opened ([https://fxdata.cloud/tutorials/set-up-a-firewall-with-ufw-on-ubuntu-16-04 ufw tutorial])
sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw allow ssh
sudo ufw enable
Currently ufw is disabled as it is crashing the server.

* fail2ban configured against brute force attacks
'''/etc/ssh/sshd_config:'''
...
LogLevel VERBOSE
...

sudo systemctl restart ssh
sudo systemctl enable fail2ban
sudo systemctl start fail2ban

Check '''/var/log/fail2ban.log''' for logs

Unban an IP:
sudo fail2ban-client set sshd unbanip <banned_ip>

Here sshd is the defaut jail name, change it if you are using a different jail.

=== System health check ===

* There should be a data disk attached (added from cloud.scaleway.com)
* The attached disk (/dev/nbdX) should be an lvm physical volume. We cannot use it directly for encryption, so we use lvm.
# Make sure '''lvm2''' and '''udev''' packages are installed
sudo apt-get install lvm2 udev

# Replace X with valid number according to '''lsblk'''
sudo pvcreate /dev/nbdX
* /dev/data is an lvm volume group created from /dev/nbdX
sudo vgcreate data /dev/nbdX
* /dev/data/diaspora is an lvm logical volume
sudo lvcreate -n diaspora /dev/data -L <size_of_disk>
* /dev/mapper/diaspora is an encrypted device
# Make sure '''cryptsetup''' package is installed
sudo apt-get install cryptsetup

# Give disk encryption password as specified in the [[#Server_Access|access repo]]
sudo cryptsetup luksFormat /dev/data/diaspora
sudo cryptsetup luksOpen /dev/data/diaspora diaspora
* /dev/mapper/diaspora is an ext4 file system
sudo mkfs.ext4 /dev/mapper/diaspora
* /var/lib/diaspora should be mounted. All [[#Handling_critical_data|critical data]] should be on /var/lib/diaspora.
sudo mkdir /var/lib/diaspora
sudo mount /dev/mapper/diaspora /var/lib/diaspora

== User Visible Services ==
=== Diaspora ===

* We use diaspora-installer-mysql package from https://people.debian.org/~praveen/diaspora/README
* See [https://salsa.debian.org/ruby-team/diaspora-installer/blob/debian/0.6.6.0+debian1/README /usr/share/doc/diaspora-common/README] for package specific configuration.
* [https://poddery.com/statistics live statistics]

=== Chat/XMPP ===

* We use Prosody and steps for setting up Prosody is given at -> https://wiki.debian.org/Diaspora/XMPP
# Follow steps 1 to 6 from https://wiki.debian.org/Diaspora/XMPP
sudo mysql -u root -p # Enter password from the access repo

CREATE USER 'prosody'@'localhost' IDENTIFIED BY '<passwd_in_repo>';
GRANT ALL PRIVILEGES ON diaspora_production.* TO 'prosody'@'localhost';
FLUSH PRIVILEGES;

sudo chown -R root:ssl-cert /etc/letsencrypt
sudo chmod g+r -R /etc/letsencrypt
sudo chmod g+x /etc/letsencrypt/{archive,live}

sudo systemctl restart prosody
* We have enabled all XEPs conversations expect. We use sslh to multiplex Diaspora and Prosody on port 443. See [https://wiki.debian.org/InstallingProsody#XMPP_over_HTTPS XMPP over HTTPS] section of the Installing Prosody article in Debian Wiki for sample sslh configuration.

==== Set Nginx Conf for BOSH URLS ====

* Add this configuration in nginx configuration file to enable the BOSH url to make JSXC Working.

'''Nginx'''

upstream chat_cluster {
server localhost:5280;
}

location /http-bind {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-Forwarded-Proto https;
proxy_redirect off;
proxy_connect_timeout 5;
proxy_buffering off;
proxy_read_timeout 70;
keepalive_timeout 70;
send_timeout 70;
client_max_body_size 4M;
client_body_buffer_size 128K;
proxy_pass http://chat_cluster;
}

Plz look [https://wiki.diasporafoundation.org/Integration/Chat#Nginx here] for more details. And apache settings [https://github.com/jsxc/jsxc/wiki/Prepare-apache here] :)

=== Chat/Matrix ===

* We use Synapse server for setting up the Matrix server.
* We will be using https://github.com/matrix-org/synapse/#synapse-installation for setting up this instance
* We use nginx reverse proxy to send requests that has ''/_matrix/*'' in url to synapse on 8008. See /etc/nginx/sites-enabled/diaspora
* We use https://git.fosscommunity.in/necessary129/synapse-diaspora-auth to authenticate synapse with Diaspora database

==== Workers ====

For scalability, we are running [https://github.com/matrix-org/synapse/blob/master/docs/workers.rst workers]. Currently all workers specified in that page, expect `synapse.app.appservice` is running on poddery.com

A new service [https://gist.github.com/necessary129/5dfbb140e4727496b0ad2bf801c10fdc <code>matrix-synapse@.service</code>] is installed for the workers.

The worker config can be found at <code>/etc/matrix-synapse/workers</code>

Synapse needs to be put under a reverse proxy see <code>/etc/nginx/sites-enabled/matrix</code>. A lot of <code>/_matrix/</code> urls needs to be overridden too see <code>/etc/nginx/sites-enabled/diaspora</code>

These lines must be added to <code>homeserver.yaml</code> as we are running <code>media_repository</code>, <code>federation_sender</code>, <code>pusher</code>, <code>user_dir</code> workers respectively:

enable_media_repo: False
send_federation: False
start_pushers: False
update_user_directory: false

These services must be enabled, and added to <code>Requires</code> and <code>Before</code> sections of the original <code>matrix-synapse.service</code>:
matrix-synapse@synchrotron.service matrix-synapse@federation_reader.service matrix-synapse@event_creator.service matrix-synapse@federation_sender.service matrix-synapse@pusher.service matrix-synapse@user_dir.service matrix-synapse@media_repository.service matrix-synapse@frontend_proxy.service matrix-synapse@client_reader.service

=== Homepage ===

Homepage and other static pages are maintained in our Gitlab instance. You can change it directly in the master branch or send pull requests. You can edit it via web as well.

* poddery.com -> https://git.fosscommunity.in/community/poddery.com
# Make sure '''git''' and '''acl''' packages are installed
sudo apt-get install git acl

# Grant rwx permissions for the ssh user to /usr/share/diaspora/public
sudo setfacl -m "u:<ssh_user>:rwx" /usr/share/diaspora/public

# Clone poddery.com repo
cd /usr/share/diaspora/public
git clone https://git.fosscommunity.in/community/poddery.com.git
cd poddery.com && mv * .[^.]* .. #Give yes for all files when prompted
cd .. && rmdir poddery.com

* save.poddery.com -> https://git.fosscommunity.in/community/save.poddery.com
cd /usr/share/diaspora/public/save
git submodule init
git submodule update
save.poddery.com repo is maintained as a sub module in poddery.com repo. See this tutorial -> https://chrisjean.com/git-submodules-adding-using-removing-and-updating/ for working with git submodules.

== Backend Services ==
=== nginx ===

Front-end for Diaspora and Matrix.

=== PostgreSQL ===

Backend for Matrix.

=== MySQL ===

Backend for Diaspora.

'''TODO''': Consider migrating to PostgreSQL to optimize resources (We can reduce one service and RAM usage).

=== exim ===

For sending emails.
sudo dpkg-reconfigure exim4-config

=== sslh ===

Port multiplexer to allow XMPP and Diaspora to share 443 port. This allows us to fool stupid firewalls which blocks all ports except 80 and 443 (hence XMPP).

=== SSL/TLS certificates ===

# letsencrypt certonly --webroot -w /usr/share/diaspora/public -d poddery.com -d www.poddery.com -d test.poddery.com -d groups.poddery.com -w /usr/share/diaspora/public/save -d save.poddery.com -w /var/www/riot -d chat.poddery.com

# cp -L /etc/letsencrypt/live/poddery.com/fullchain.pem /etc/diaspora/ssl/poddery.com-bundle.pem
# cp -L /etc/letsencrypt/live/poddery.com/privkey.pem /etc/diaspora/ssl/poddery.com.key
# chown -R root:ssl-cert /etc/letsencrypt
# chmod g+r -R /etc/letsencrypt
# chmod g+x /etc/letsencrypt/*

Make sure the certificates used by prosody are symbolic links to letsencrypt default location.

# ls -l /etc/prosody/certs/
total 0
lrwxrwxrwx 1 root root 40 Mar 28 01:16 poddery.com.crt -> /etc/letsencrypt/live/poddery.com/fullchain.pem
lrwxrwxrwx 1 root root 33 Mar 28 01:16 poddery.com.key -> /etc/letsencrypt/live/poddery.com/privkey.pem

# crontab -e
30 2 * * 1 letsencrypt renew >> /var/log/le-renew.log
32 2 * * 1 /etc/init.d/nginx reload
34 2 * * 1 /etc/init.d/prosody reload

=== Handling critical data ===
sudo /etc/init.d/mysql stop
sudo mv /var/lib/mysql /var/lib/diaspora
sudo ln /var/lib/diaspora/mysql /var/lib/mysql
sudo mkdir /var/lib/diaspora/uploads
sudo chown -R diaspora: /var/lib/diaspora/uploads
sudo ln -s /var/lib/diaspora/uploads /usr/share/diaspora/public/uploads

=== Services health check ===

Sample output - Look for "Active: active (running)"

systemctl status nginx # Our web server front-end for Diaspora, XMPP and Matrix
nginx.service - A high performance web server and a reverse proxy server
Loaded: loaded (/lib/systemd/system/nginx.service; enabled)
Active: active (running) since Fri 2018-01-05 07:17:02 UTC; 4 weeks 1 days ago
Process: 5063 ExecStop=/sbin/start-stop-daemon --quiet --stop --retry QUIT/5 --pidfile /run/nginx.pid (code=exited, status=0/SUCCESS)
Process: 13140 ExecReload=/usr/sbin/nginx -g daemon on; master_process on; -s reload (code=exited, status=0/SUCCESS)
Process: 5071 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
Process: 5067 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
Main PID: 5072 (nginx)
CGroup: /system.slice/nginx.service
├─ 5072 nginx: master process /usr/sbin/nginx -g daemon on; master_process on;
├─13149 nginx: worker process
├─13150 nginx: worker process
├─13151 nginx: worker process
└─13153 nginx: worker process

systemctl status diaspora # Diaspora service
diaspora.service - LSB: Diaspora application server
Loaded: loaded (/etc/init.d/diaspora)
Active: active (running) since Fri 2018-01-05 07:21:29 UTC; 4 weeks 1 days ago
Process: 5146 ExecStop=/etc/init.d/diaspora stop (code=exited, status=0/SUCCESS)
Process: 5167 ExecStart=/etc/init.d/diaspora start (code=exited, status=0/SUCCESS)
CGroup: /system.slice/diaspora.service
├─ 850 unicorn worker[0] -c config/unicorn.rb -D
├─ 5174 sudo -u diaspora -E -H ./script/server
├─ 5175 eye monitoring v0.9.1 [diaspora] (in /usr/share/diaspora)
├─ 5211 sidekiq 4.2.9 diaspora [0 of 25 busy]
├─ 5222 unicorn master -c config/unicorn.rb -D
└─31717 unicorn worker[1] -c config/unicorn.rb -D

systemctl status matrix-synapse.service # Synapse Matrix Server
matrix-synapse.service - Synapse Matrix homeserver
Loaded: loaded (/lib/systemd/system/matrix-synapse.service; enabled)
Active: active (running) since Sat 2018-01-13 05:38:55 UTC; 3 weeks 1 days ago
Process: 15800 ExecStartPre=/var/lib/matrix-synapse/synapse/bin/python2.7 -m synapse.app.homeserver --config-path=/etc/matrix-synapse/homeserver.yaml --config-path=/etc/matrix-synapse/conf.d/ --generate-keys (code=exited, status=0/SUCCESS)
Main PID: 15808 (python2.7)
CGroup: /system.slice/matrix-synapse.service
└─15808 /var/lib/matrix-synapse/synapse/bin/python2.7 -m synapse.app.homeserver --config-path=/etc/matrix-synapse/homeserver.yaml --config-path=/etc/matrix-synapse/conf.d/

systemctl status prosody # Prosody XMPP Server
prosody.service - LSB: Prosody XMPP Server
Loaded: loaded (/etc/init.d/prosody)
Active: active (running) since Fri 2018-01-05 07:35:41 UTC; 4 weeks 1 days ago
Process: 6218 ExecStop=/etc/init.d/prosody stop (code=exited, status=0/SUCCESS)
Process: 6483 ExecReload=/etc/init.d/prosody reload (code=exited, status=0/SUCCESS)
Process: 6223 ExecStart=/etc/init.d/prosody start (code=exited, status=0/SUCCESS)
CGroup: /system.slice/prosody.service
└─6231 /usr/bin/lua5.1 /usr/bin/prosody

systemctl status sslh # SSL/SSH multiplexer which allow us to provide multiple services via 443 port (to bypass stupid firewalls)
sslh.service - SSL/SSH multiplexer
Loaded: loaded (/lib/systemd/system/sslh.service; enabled)
Active: active (running) since Fri 2018-01-05 07:29:27 UTC; 4 weeks 1 days ago
Docs: man:sslh(8)
Main PID: 5444 (sslh)
CGroup: /system.slice/sslh.service
├─ 713 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 830 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 1672 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 1673 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3514 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3875 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3876 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3896 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 4965 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5395 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5444 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5445 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5963 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 6617 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 6774 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 6957 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 7063 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 7083 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─25613 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
└─27481 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg

= Coordination =

*[https://www.loomio.org/g/2bjVXqAu/fosscommunity-in-poddery-com-maintainer-s-group loomio group] - we use this for decision making.
* Hangout with us in our Matrix room [https://matrix.to/#/#poddery:poddery.com #poddery:poddery.com]
* [https://git.fosscommunity.in/community/poddery.com/issues issue tracker] - we use this to track progress of tasks

=== Contact ===

Email: poddery at autistici.org (alias that reaches Akhilan, Abhijith Balan, Fayad, Balasankar, Julius, Praveen, Prasobh, Sruthi, Shirish, Vamsee and Manukrishnan)

The following people have their GPG keys in the password file.

Praveen Arimbrathodiyil (piratepin) (ID: 0xCE1F9C674512), Balasankar C (ID: 0x96EDAB9B2E6B7171), Manu Krishnan T V (ID: 0x5D0064186AF037D9), Fayad Fami (fayad) (ID: 0x51C954405D432381), Abhijith PA (ID: 0x863D4DF2ED9C28EF), Syam G Krishnan (sgk) (ID: 0x6EF48CCD865A1FFC), Sagar Ippalpalli (ID: 0xFD49D0BC6FEAECDA), Pirate Bady (piratesin) (ID: 0x92FDAB42A95FF20C), Kannan (ID: 0x0B1955F40C691CCE)

We recommend you setup [http://www.vim.org/scripts/script.php?script_id=3645 Vim GPG Plugin] for transparent editing. If you are new to GPG, then follow [https://www.madboa.com/geek/gpg-quickstart/ this guide].

=== Server Access ===

Maintained in a private git repo at -> https://git.fosscommunity.in/community/access

= Setting up Backup =

Backup was setup on a Scaleway C1 VPS (4 core ARM processor with 2GB RAM). '''TODO: C1 server was crashing frequently and we need to setup backup again on VPS provided by Manu'''.

Hostname (IP): backup.poddery.com (No public ip, access via scaleway.com web console). If you restart this machine, you may want to add poddery.com private ip in /etc/hosts

# apt-get install lvm2 cryptsetup

Directly creating luks volume on /dev/nbd1 is not working, so we use a logical volume

# pvcreate /dev/nbd1
# vgcreate data /dev/nbd1
# lvcreate -n diaspora -L 46.5G /dev/data

# cryptsetup luksFormat /dev/data/diaspora
# cryptsetup luksOpen /dev/data/diaspora diaspora

and update /etc/crypttab
# <target name> <source device> <key file> <options>
diaspora /dev/data/diaspora none luks

# mkfs.ext4 /dev/mapper/diaspora
# mkdir /var/lib/diaspora
and update /etc/fstab
# UNCONFIGURED FSTAB FOR BASE SYSTEM
/dev/mapper/diaspora /var/lib/diaspora ext4 defaults 0 2

# mount -a
# apt-get install mysql-server

Move MySQL data directory to encrypted volume
# /etc/init.d/mysql stop
# mv /var/lib/mysql /var/lib/diaspora/
# ln -s /var/lib/diaspora/mysql /var/lib/mysql

Follow steps in https://dev.mysql.com/doc/refman/5.5/en/replication-howto-masterbaseconfig.html for replication

Follow steps in https://www.howtoforge.com/how-to-set-up-mysql-database-replication-with-ssl-encryption-on-centos-5.4 for ssl (but ssl support is disabled in debian)

Follow steps in http://www.networkcomputing.com/storage/how-set-ssh-encrypted-mysql-replication/1111882674 to use ssh port forwarding to have encrypted replication

# adduser sshtunnel --disabled-login
# su sshtunnel

Generate SSH key pair and copy public key to target system
$ ssh-keygen -t rsa
$ ssh -f sshtunnel@poddery.com -L 7777:127.0.0.1:3306 -N

Test the connectivity
# mysql -u poddery_backup -p -P 7777 -h 127.0.0.1

Uploads are rsynced every hour

# crontab -e
# m h dom mon dow command
0 * * * * pgrep rsync || rsync -av --delete root@poddery.com:/var/lib/diaspora/uploads/ /var/lib/diaspora/uploads/ >/var/lib/diaspora/rsync-uploads.log

'''Note:''' Since we are not using a public ip (saves us money), backup.poddery.com connects to poddery.com via private ip. So if poddery.com is rebooted, the new ip address should be updated in /etc/hosts file of backup.poddery.com. To connect, use the web console from scaleway.com

= Add more disk space =

# Power off the machine with "ARCHIVE" option. It may take upto an hour for shutdown to complete on backup.poddery.com and poddery.com
# Add more disk from scaleway.com control panel . Volumes -> CREATE VOLUME
# Attach the newly created volume to server from Server page
# Power on the server
# Create physical volume (pvcreate /dev/nbdN)
# Expand volume group (vgextend data /dev/nbdN)
# Expand logical volume (lvresize --size=186G data/diaspora)
# Expand encrypted partition (cryptsetup resize diaspora)
# Resize file system (resize2fs /dev/mapper/diaspora)

= Maintenance history =
This section holds maintenance/issue history for future tracking.

'''When updating diaspora-installer-mysql packages, remember to recreate /usr/share/diaspora/public/uploads symlink to /var/lib/diaspora/uploads'''.

1. Prosody error - Failed to load private key

certmanager error SSL/TLS: Failed to load '/etc/letsencrypt/live/poddery.com/privkey.pem': Previous error (see logs), or other system error. (for poddery.com)
tls error Unable to initialize TLS: error loading private key (system lib)
certmanager error SSL/TLS: Failed to load '/etc/letsencrypt/live/poddery.com/privkey.pem': Check that the permissions allow Prosody to read this file.

This error is usually when ssl certificate in freshly installed or renewed. Prosody user is unable to access the key file due to lack of privileges.

Note that Poddery uses Letsencrypt for ssl.

Fix:

* Make sure that prosody user is in 'certs' group (this group may also be called ssl-certs as setup by Letencrypt)
* /etc/letsencrypt/ is the ssl directory.
* Prosody user should have permissions to all folders importantly archive and live folders in /etc/letsencrypt. Permissions to each folder must be 750.
* Troubleshoot by checking if you can switch to each folder in /etc/letsencrypt as prosody user and cat the files.

'''If replication fails, you can restart it following the instructions here'''

https://dba.stackexchange.com/questions/69394/mysql-replication-error-1594

[[Category:Services]]

Poddery - Diaspora, Matrix and XMPP

2018-04-17T13:47:13Z

Noteness: Add synapse workers

We run Diaspora, XMPP and Matrix services at [https://poddery.com poddery.com]. Diaspora username and password can be used to access XMPP and Matrix services. [https://chat.poddery.com chat.poddery.com] provides Riot client (accessed by a web browser), which can be used to connect to any Matrix server without installing a Riot app/client.

= Environment =
== Hosting ==
We are on a [https://www.scaleway.com/baremetal-cloud-servers/ C2S instance of scaleway.com bare metal cloud server].

* 4 Dedicated x86 64bit Cores
* 8GB Memory
* 50GB SSD Disk
* 1 Flexible Public IPv4
* 300Mbit/s Unmetered bandwidth
* 2.5Gbit/s Internal bandwidth
* €11.99 Per Month

Due to performance issues we are migrating to a new server ([https://www.scaleway.com/baremetal-cloud-servers/ C2M instance of scaleway.com]) with the following specs:

* '''8''' Dedicated x86 64bit Cores
* '''16GB''' Memory
* 50GB SSD Disk
* 1 Flexible Public IPv4
* '''500Mbit/s''' Unmeterd bandwidth
* '''5Gbit/s''' Internal bandwidth
* '''€17.99''' Per Month
* Extra '''150GB''' SSD
* Total '''€20.99''' Per Month

== Operating System ==

We run Debian 9 Stretch image provided by Scaleway, with latest security updates applied.

=== Hardening checklist ===
* SSH password login disabled (allow only key based logins)
* root SSH login disabled (use a normal user with sudo)
'''/etc/ssh/sshd_config:'''
...
PermitRootLogin no
...
PasswordAuthentication no
...
* Firewall enabled with only the ports we need opened ([https://fxdata.cloud/tutorials/set-up-a-firewall-with-ufw-on-ubuntu-16-04 ufw tutorial])
sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw allow ssh
sudo ufw enable
Currently ufw is disabled as it is crashing the server.

* fail2ban configured against brute force attacks
'''/etc/ssh/sshd_config:'''
...
LogLevel VERBOSE
...

sudo systemctl restart ssh
sudo systemctl enable fail2ban
sudo systemctl start fail2ban

Check '''/var/log/fail2ban.log''' for logs

Unban an IP:
sudo fail2ban-client set sshd unbanip <banned_ip>

Here sshd is the defaut jail name, change it if you are using a different jail.

=== System health check ===

* There should be a data disk attached (added from cloud.scaleway.com)
* The attached disk (/dev/nbdX) should be an lvm physical volume. We cannot use it directly for encryption, so we use lvm.
# Make sure '''lvm2''' and '''udev''' packages are installed
sudo apt-get install lvm2 udev

# Replace X with valid number according to '''lsblk'''
sudo pvcreate /dev/nbdX
* /dev/data is an lvm volume group created from /dev/nbdX
sudo vgcreate data /dev/nbdX
* /dev/data/diaspora is an lvm logical volume
sudo lvcreate -n diaspora /dev/data -L <size_of_disk>
* /dev/mapper/diaspora is an encrypted device
# Make sure '''cryptsetup''' package is installed
sudo apt-get install cryptsetup

# Give disk encryption password as specified in the [[#Server_Access|access repo]]
sudo cryptsetup luksFormat /dev/data/diaspora
sudo cryptsetup luksOpen /dev/data/diaspora diaspora
* /dev/mapper/diaspora is an ext4 file system
sudo mkfs.ext4 /dev/mapper/diaspora
* /var/lib/diaspora should be mounted. All [[#Handling_critical_data|critical data]] should be on /var/lib/diaspora.
sudo mkdir /var/lib/diaspora
sudo mount /dev/mapper/diaspora /var/lib/diaspora

== User Visible Services ==
=== Diaspora ===

* We use diaspora-installer-mysql package from https://people.debian.org/~praveen/diaspora/README
* See [https://salsa.debian.org/ruby-team/diaspora-installer/blob/debian/0.6.6.0+debian1/README /usr/share/doc/diaspora-common/README] for package specific configuration.
* [https://poddery.com/statistics live statistics]

=== Chat/XMPP ===

* We use Prosody and steps for setting up Prosody is given at -> https://wiki.debian.org/Diaspora/XMPP
# Follow steps 1 to 6 from https://wiki.debian.org/Diaspora/XMPP
sudo mysql -u root -p # Enter password from the access repo

CREATE USER 'prosody'@'localhost' IDENTIFIED BY '<passwd_in_repo>';
GRANT ALL PRIVILEGES ON diaspora_production.* TO 'prosody'@'localhost';
FLUSH PRIVILEGES;

sudo chown -R root:ssl-cert /etc/letsencrypt
sudo chmod g+r -R /etc/letsencrypt
sudo chmod g+x /etc/letsencrypt/{archive,live}

sudo systemctl restart prosody
* We have enabled all XEPs conversations expect. We use sslh to multiplex Diaspora and Prosody on port 443. See [https://wiki.debian.org/InstallingProsody#XMPP_over_HTTPS XMPP over HTTPS] section of the Installing Prosody article in Debian Wiki for sample sslh configuration.

==== Set Nginx Conf for BOSH URLS ====

* Add this configuration in nginx configuration file to enable the BOSH url to make JSXC Working.

'''Nginx'''

upstream chat_cluster {
server localhost:5280;
}

location /http-bind {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-Forwarded-Proto https;
proxy_redirect off;
proxy_connect_timeout 5;
proxy_buffering off;
proxy_read_timeout 70;
keepalive_timeout 70;
send_timeout 70;
client_max_body_size 4M;
client_body_buffer_size 128K;
proxy_pass http://chat_cluster;
}

Plz look [https://wiki.diasporafoundation.org/Integration/Chat#Nginx here] for more details. And apache settings [https://github.com/jsxc/jsxc/wiki/Prepare-apache here] :)

=== Chat/Matrix ===

* We use Synapse server for setting up the Matrix server.
* We will be using https://github.com/matrix-org/synapse/#synapse-installation for setting up this instance
* We use nginx reverse proxy to send requests that has ''/_matrix/*'' in url to synapse on 8008. See /etc/nginx/sites-enabled/diaspora
* We use https://git.fosscommunity.in/necessary129/synapse-diaspora-auth to authenticate synapse with Diaspora database

==== Workers ====

For scalability, we are running [https://github.com/matrix-org/synapse/blob/master/docs/workers.rst workers]. Currently all workers specified in that page, expect `synapse.app.appservice` is running on poddery.com

A new service [https://gist.github.com/necessary129/5dfbb140e4727496b0ad2bf801c10fdc <code>matrix-synapse@.service</code>] is installed for the workers.

The worker config can be found at <code>/etc/matrix-synapse/workers</code>

Synapse needs to be put under a reverse proxy see <code>/etc/nginx/sites-enabled/matrix</code>. A lot of <code>/_matrix/</code> urls needs to be overridden too see <code>/etc/nginx/sites-enabled/diaspora</code>

These lines must be added to <code>homeserver.yaml</code> as we are running <code>media_repository</code>, <code>federation_sender</code>, <code>pusher</code> respectively:

enable_media_repo: False
send_federation: False
start_pushers: False

These services must be enabled, and added to <code>Requires</code> and <code>Before</code> sections of the original <code>matrix-synapse.service</code>:
matrix-synapse@synchrotron.service matrix-synapse@federation_reader.service matrix-synapse@event_creator.service matrix-synapse@federation_sender.service matrix-synapse@pusher.service matrix-synapse@user_dir.service matrix-synapse@media_repository.service matrix-synapse@frontend_proxy.service matrix-synapse@client_reader.service

=== Homepage ===

Homepage and other static pages are maintained in our Gitlab instance. You can change it directly in the master branch or send pull requests. You can edit it via web as well.

* poddery.com -> https://git.fosscommunity.in/community/poddery.com
# Make sure '''git''' and '''acl''' packages are installed
sudo apt-get install git acl

# Grant rwx permissions for the ssh user to /usr/share/diaspora/public
sudo setfacl -m "u:<ssh_user>:rwx" /usr/share/diaspora/public

# Clone poddery.com repo
cd /usr/share/diaspora/public
git clone https://git.fosscommunity.in/community/poddery.com.git
cd poddery.com && mv * .[^.]* .. #Give yes for all files when prompted
cd .. && rmdir poddery.com

* save.poddery.com -> https://git.fosscommunity.in/community/save.poddery.com
cd /usr/share/diaspora/public/save
git submodule init
git submodule update
save.poddery.com repo is maintained as a sub module in poddery.com repo. See this tutorial -> https://chrisjean.com/git-submodules-adding-using-removing-and-updating/ for working with git submodules.

== Backend Services ==
=== nginx ===

Front-end for Diaspora and Matrix.

=== PostgreSQL ===

Backend for Matrix.

=== MySQL ===

Backend for Diaspora.

'''TODO''': Consider migrating to PostgreSQL to optimize resources (We can reduce one service and RAM usage).

=== exim ===

For sending emails.
sudo dpkg-reconfigure exim4-config

=== sslh ===

Port multiplexer to allow XMPP and Diaspora to share 443 port. This allows us to fool stupid firewalls which blocks all ports except 80 and 443 (hence XMPP).

=== SSL/TLS certificates ===

# letsencrypt certonly --webroot -w /usr/share/diaspora/public -d poddery.com -d www.poddery.com -d test.poddery.com -d groups.poddery.com -w /usr/share/diaspora/public/save -d save.poddery.com -w /var/www/riot -d chat.poddery.com

# cp -L /etc/letsencrypt/live/poddery.com/fullchain.pem /etc/diaspora/ssl/poddery.com-bundle.pem
# cp -L /etc/letsencrypt/live/poddery.com/privkey.pem /etc/diaspora/ssl/poddery.com.key
# chown -R root:ssl-cert /etc/letsencrypt
# chmod g+r -R /etc/letsencrypt
# chmod g+x /etc/letsencrypt/*

Make sure the certificates used by prosody are symbolic links to letsencrypt default location.

# ls -l /etc/prosody/certs/
total 0
lrwxrwxrwx 1 root root 40 Mar 28 01:16 poddery.com.crt -> /etc/letsencrypt/live/poddery.com/fullchain.pem
lrwxrwxrwx 1 root root 33 Mar 28 01:16 poddery.com.key -> /etc/letsencrypt/live/poddery.com/privkey.pem

# crontab -e
30 2 * * 1 letsencrypt renew >> /var/log/le-renew.log
32 2 * * 1 /etc/init.d/nginx reload
34 2 * * 1 /etc/init.d/prosody reload

=== Handling critical data ===
sudo /etc/init.d/mysql stop
sudo mv /var/lib/mysql /var/lib/diaspora
sudo ln /var/lib/diaspora/mysql /var/lib/mysql
sudo mkdir /var/lib/diaspora/uploads
sudo chown -R diaspora: /var/lib/diaspora/uploads
sudo ln -s /var/lib/diaspora/uploads /usr/share/diaspora/public/uploads

=== Services health check ===

Sample output - Look for "Active: active (running)"

systemctl status nginx # Our web server front-end for Diaspora, XMPP and Matrix
nginx.service - A high performance web server and a reverse proxy server
Loaded: loaded (/lib/systemd/system/nginx.service; enabled)
Active: active (running) since Fri 2018-01-05 07:17:02 UTC; 4 weeks 1 days ago
Process: 5063 ExecStop=/sbin/start-stop-daemon --quiet --stop --retry QUIT/5 --pidfile /run/nginx.pid (code=exited, status=0/SUCCESS)
Process: 13140 ExecReload=/usr/sbin/nginx -g daemon on; master_process on; -s reload (code=exited, status=0/SUCCESS)
Process: 5071 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
Process: 5067 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
Main PID: 5072 (nginx)
CGroup: /system.slice/nginx.service
├─ 5072 nginx: master process /usr/sbin/nginx -g daemon on; master_process on;
├─13149 nginx: worker process
├─13150 nginx: worker process
├─13151 nginx: worker process
└─13153 nginx: worker process

systemctl status diaspora # Diaspora service
diaspora.service - LSB: Diaspora application server
Loaded: loaded (/etc/init.d/diaspora)
Active: active (running) since Fri 2018-01-05 07:21:29 UTC; 4 weeks 1 days ago
Process: 5146 ExecStop=/etc/init.d/diaspora stop (code=exited, status=0/SUCCESS)
Process: 5167 ExecStart=/etc/init.d/diaspora start (code=exited, status=0/SUCCESS)
CGroup: /system.slice/diaspora.service
├─ 850 unicorn worker[0] -c config/unicorn.rb -D
├─ 5174 sudo -u diaspora -E -H ./script/server
├─ 5175 eye monitoring v0.9.1 [diaspora] (in /usr/share/diaspora)
├─ 5211 sidekiq 4.2.9 diaspora [0 of 25 busy]
├─ 5222 unicorn master -c config/unicorn.rb -D
└─31717 unicorn worker[1] -c config/unicorn.rb -D

systemctl status matrix-synapse.service # Synapse Matrix Server
matrix-synapse.service - Synapse Matrix homeserver
Loaded: loaded (/lib/systemd/system/matrix-synapse.service; enabled)
Active: active (running) since Sat 2018-01-13 05:38:55 UTC; 3 weeks 1 days ago
Process: 15800 ExecStartPre=/var/lib/matrix-synapse/synapse/bin/python2.7 -m synapse.app.homeserver --config-path=/etc/matrix-synapse/homeserver.yaml --config-path=/etc/matrix-synapse/conf.d/ --generate-keys (code=exited, status=0/SUCCESS)
Main PID: 15808 (python2.7)
CGroup: /system.slice/matrix-synapse.service
└─15808 /var/lib/matrix-synapse/synapse/bin/python2.7 -m synapse.app.homeserver --config-path=/etc/matrix-synapse/homeserver.yaml --config-path=/etc/matrix-synapse/conf.d/

systemctl status prosody # Prosody XMPP Server
prosody.service - LSB: Prosody XMPP Server
Loaded: loaded (/etc/init.d/prosody)
Active: active (running) since Fri 2018-01-05 07:35:41 UTC; 4 weeks 1 days ago
Process: 6218 ExecStop=/etc/init.d/prosody stop (code=exited, status=0/SUCCESS)
Process: 6483 ExecReload=/etc/init.d/prosody reload (code=exited, status=0/SUCCESS)
Process: 6223 ExecStart=/etc/init.d/prosody start (code=exited, status=0/SUCCESS)
CGroup: /system.slice/prosody.service
└─6231 /usr/bin/lua5.1 /usr/bin/prosody

systemctl status sslh # SSL/SSH multiplexer which allow us to provide multiple services via 443 port (to bypass stupid firewalls)
sslh.service - SSL/SSH multiplexer
Loaded: loaded (/lib/systemd/system/sslh.service; enabled)
Active: active (running) since Fri 2018-01-05 07:29:27 UTC; 4 weeks 1 days ago
Docs: man:sslh(8)
Main PID: 5444 (sslh)
CGroup: /system.slice/sslh.service
├─ 713 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 830 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 1672 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 1673 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3514 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3875 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3876 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 3896 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 4965 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5395 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5444 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5445 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 5963 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 6617 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 6774 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 6957 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 7063 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─ 7083 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
├─25613 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg
└─27481 /usr/sbin/sslh --foreground -F /etc/sslh/sslh.cfg

= Coordination =

*[https://www.loomio.org/g/2bjVXqAu/fosscommunity-in-poddery-com-maintainer-s-group loomio group] - we use this for decision making.
* Hangout with us in our Matrix room [https://matrix.to/#/#poddery:poddery.com #poddery:poddery.com]
* [https://git.fosscommunity.in/community/poddery.com/issues issue tracker] - we use this to track progress of tasks

=== Contact ===

Email: poddery at autistici.org (alias that reaches Akhilan, Abhijith Balan, Fayad, Balasankar, Julius, Praveen, Prasobh, Sruthi, Shirish, Vamsee and Manukrishnan)

The following people have their GPG keys in the password file.

Praveen Arimbrathodiyil (piratepin) (ID: 0xCE1F9C674512), Balasankar C (ID: 0x96EDAB9B2E6B7171), Manu Krishnan T V (ID: 0x5D0064186AF037D9), Fayad Fami (fayad) (ID: 0x51C954405D432381), Abhijith PA (ID: 0x863D4DF2ED9C28EF), Syam G Krishnan (sgk) (ID: 0x6EF48CCD865A1FFC), Sagar Ippalpalli (ID: 0xFD49D0BC6FEAECDA), Pirate Bady (piratesin) (ID: 0x92FDAB42A95FF20C), Kannan (ID: 0x0B1955F40C691CCE)

We recommend you setup [http://www.vim.org/scripts/script.php?script_id=3645 Vim GPG Plugin] for transparent editing. If you are new to GPG, then follow [https://www.madboa.com/geek/gpg-quickstart/ this guide].

=== Server Access ===

Maintained in a private git repo at -> https://git.fosscommunity.in/community/access

= Setting up Backup =

Backup was setup on a Scaleway C1 VPS (4 core ARM processor with 2GB RAM). '''TODO: C1 server was crashing frequently and we need to setup backup again on VPS provided by Manu'''.

Hostname (IP): backup.poddery.com (No public ip, access via scaleway.com web console). If you restart this machine, you may want to add poddery.com private ip in /etc/hosts

# apt-get install lvm2 cryptsetup

Directly creating luks volume on /dev/nbd1 is not working, so we use a logical volume

# pvcreate /dev/nbd1
# vgcreate data /dev/nbd1
# lvcreate -n diaspora -L 46.5G /dev/data

# cryptsetup luksFormat /dev/data/diaspora
# cryptsetup luksOpen /dev/data/diaspora diaspora

and update /etc/crypttab
# <target name> <source device> <key file> <options>
diaspora /dev/data/diaspora none luks

# mkfs.ext4 /dev/mapper/diaspora
# mkdir /var/lib/diaspora
and update /etc/fstab
# UNCONFIGURED FSTAB FOR BASE SYSTEM
/dev/mapper/diaspora /var/lib/diaspora ext4 defaults 0 2

# mount -a
# apt-get install mysql-server

Move MySQL data directory to encrypted volume
# /etc/init.d/mysql stop
# mv /var/lib/mysql /var/lib/diaspora/
# ln -s /var/lib/diaspora/mysql /var/lib/mysql

Follow steps in https://dev.mysql.com/doc/refman/5.5/en/replication-howto-masterbaseconfig.html for replication

Follow steps in https://www.howtoforge.com/how-to-set-up-mysql-database-replication-with-ssl-encryption-on-centos-5.4 for ssl (but ssl support is disabled in debian)

Follow steps in http://www.networkcomputing.com/storage/how-set-ssh-encrypted-mysql-replication/1111882674 to use ssh port forwarding to have encrypted replication

# adduser sshtunnel --disabled-login
# su sshtunnel

Generate SSH key pair and copy public key to target system
$ ssh-keygen -t rsa
$ ssh -f sshtunnel@poddery.com -L 7777:127.0.0.1:3306 -N

Test the connectivity
# mysql -u poddery_backup -p -P 7777 -h 127.0.0.1

Uploads are rsynced every hour

# crontab -e
# m h dom mon dow command
0 * * * * pgrep rsync || rsync -av --delete root@poddery.com:/var/lib/diaspora/uploads/ /var/lib/diaspora/uploads/ >/var/lib/diaspora/rsync-uploads.log

'''Note:''' Since we are not using a public ip (saves us money), backup.poddery.com connects to poddery.com via private ip. So if poddery.com is rebooted, the new ip address should be updated in /etc/hosts file of backup.poddery.com. To connect, use the web console from scaleway.com

= Add more disk space =

# Power off the machine with "ARCHIVE" option. It may take upto an hour for shutdown to complete on backup.poddery.com and poddery.com
# Add more disk from scaleway.com control panel . Volumes -> CREATE VOLUME
# Attach the newly created volume to server from Server page
# Power on the server
# Create physical volume (pvcreate /dev/nbdN)
# Expand volume group (vgextend data /dev/nbdN)
# Expand logical volume (lvresize --size=186G data/diaspora)
# Expand encrypted partition (cryptsetup resize diaspora)
# Resize file system (resize2fs /dev/mapper/diaspora)

= Maintenance history =
This section holds maintenance/issue history for future tracking.

'''When updating diaspora-installer-mysql packages, remember to recreate /usr/share/diaspora/public/uploads symlink to /var/lib/diaspora/uploads'''.

1. Prosody error - Failed to load private key

certmanager error SSL/TLS: Failed to load '/etc/letsencrypt/live/poddery.com/privkey.pem': Previous error (see logs), or other system error. (for poddery.com)
tls error Unable to initialize TLS: error loading private key (system lib)
certmanager error SSL/TLS: Failed to load '/etc/letsencrypt/live/poddery.com/privkey.pem': Check that the permissions allow Prosody to read this file.

This error is usually when ssl certificate in freshly installed or renewed. Prosody user is unable to access the key file due to lack of privileges.

Note that Poddery uses Letsencrypt for ssl.

Fix:

* Make sure that prosody user is in 'certs' group (this group may also be called ssl-certs as setup by Letencrypt)
* /etc/letsencrypt/ is the ssl directory.
* Prosody user should have permissions to all folders importantly archive and live folders in /etc/letsencrypt. Permissions to each folder must be 750.
* Troubleshoot by checking if you can switch to each folder in /etc/letsencrypt as prosody user and cat the files.

'''If replication fails, you can restart it following the instructions here'''

https://dba.stackexchange.com/questions/69394/mysql-replication-error-1594

[[Category:Services]]