A simple Dockerfile that uses the official Linux install procedure at https://docs.mattermost.com/install/install-ubuntu-2004.html

It exposes a non-HTTPS port at port 80. You can use caddy/nginx/etc to provide SSL termination if needed.

Usage

1. Copy config.json.ref to config.json and edit appropriately.
2. Build the Dockerfile: docker build -t simple-mattermost-docker .
3. Launch the container with the following variables.

• MM_SERVICESETTINGS_SITEURL - SiteURL e.g. http://mattermost.example/
• MATTERMOST_DB_TYPE - postgres or mysql
• MATTERMOST_DB_DATASOURCE - depending on the database type, a string of either the form postgres://mmuser:<mmuser-password>@<host-name-or-IP>:5432/mattermost?sslmode=disable&connect_timeout=10 or mmuser:<mmuser-password>@tcp(<host-name-or-IP>:3306)/mattermost?charset=utf8mb4,utf8&writeTimeout=30s

You can set most settings via environment variables: https://docs.mattermost.com/administration/config-settings.html#environment-variables

e.g.

# postgres
docker run --name my_postgres \
  -e POSTGRES_USER=mmuser \
  -e POSTGRES_DB=mattermost \
  -e POSTGRES_PASSWORD=mysecretpassword -d postgres

docker run --name my_mm -it \
  -e "MM_SERVICESETTINGS_SITEURL=http://mattermost.example" \
  -e "MATTERMOST_DB_TYPE=postgres" \
  -e "MATTERMOST_DB_DATASOURCE=postgres://mmuser:mysecretpassword@172.17.0.2:5432/mattermost?sslmode=disable&connect_timeout=10" \
  -d simple-mattermost-docker
# optional: -p 80:80

Volumes to save

• /opt/mattermost/data - save this for all user-uploaded data
• /opt/mattermost/plugins and /opt/mattermost/client/plugins - Mattermost plugins
• /opt/mattermost/logs - logs (optional)