MatterMost

Intro

Details

Ingredients

Docker swarm cluster with persistent shared storage
Traefik configured per design
DNS entry for the hostname you intend to use, pointed to your keepalived IP

Preparation

Setup data locations

We'll need several directories to bind-mount into our container, so create them in /var/data/mattermost:

mkdir -p /var/data/mattermost/{cert,config,data,logs,plugins,database-dump}
mkdir -p /var/data/realtime/mattermost/database

Prepare environment

Create mattermost.env, and populate with the following variables

POSTGRES_USER=mmuser
POSTGRES_PASSWORD=mmuser_password
POSTGRES_DB=mattermost
MM_USERNAME=mmuser
MM_PASSWORD=mmuser_password
MM_DBNAME=mattermost

Now create mattermost-backup.env, and populate with the following variables:

PGHOST=db
PGUSER=mmuser
PGPASSWORD=mmuser_password
BACKUP_NUM_KEEP=7
BACKUP_FREQUENCY=1d

Setup Docker Swarm

Create a docker swarm config file in docker-compose syntax (v3), something like this:

!!! tip I share (with my patreon patrons) a private "premix" git repository, which includes necessary docker-compose and env files for all published recipes. This means that patrons can launch any recipe with just a git pull and a docker stack deploy 👍

version: '3'

services:

    db:
      image: mattermost/mattermost-prod-db
      env_file: /var/data/config/mattermost/mattermost.env
      volumes:
        - /var/data/realtime/mattermost/database:/var/lib/postgresql/data
      networks:
        - internal

    app:
      image: mattermost/mattermost-team-edition
      env_file: /var/data/config/mattermost/mattermost.env      
      volumes:
        - /var/data/mattermost/config:/mattermost/config:rw
        - /var/data/mattermost/data:/mattermost/data:rw
        - /var/data/mattermost/logs:/mattermost/logs:rw
        - /var/data/mattermost/plugins:/mattermost/plugins:rw

    db-backup:
      image: mattermost/mattermost-prod-db
      env_file: /var/data/config/mattermost/mattermost-backup.env
      volumes:
        - /var/data/mattermost/database-dump:/dump
      entrypoint: |
        bash -c 'bash -s <<EOF
        trap "break;exit" SIGHUP SIGINT SIGTERM
        sleep 2m
        while /bin/true; do
          pg_dump -Fc > /dump/dump_\`date +%d-%m-%Y"_"%H_%M_%S\`.psql
          (ls -t /dump/dump*.psql|head -n $$BACKUP_NUM_KEEP;ls /dump/dump*.psql)|sort|uniq -u|xargs rm -- {}
          sleep $$BACKUP_FREQUENCY
        done
        EOF'
      networks:
      - internal


networks:
  traefik_public:
    external: true
  internal:
    driver: overlay
    ipam:
      config:
        - subnet: 172.16.40.0/24

!!! note Setup unique static subnets for every stack you deploy. This avoids IP/gateway conflicts which can otherwise occur when you're creating/removing stacks a lot. See my list here.

Serving

Launch MatterMost stack

Launch the MatterMost stack by running docker stack deploy mattermost -c <path -to-docker-compose.yml>

Log into your new instance at https://YOUR-FQDN, with user "root" and the password you specified in gitlab.env.

Chef's Notes

If you wanted to expose the Wekan UI directly, you could remove the oauth2_proxy from the design, and move the traefik_public-related labels directly to the wekan container. You'd also need to add the traefik_public network to the wekan container.

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