docker-compose-postgres.yml

TLDR

This file is a Docker Compose file that sets up a PostgreSQL database container and a dependency container for a Mattermost application.

Services

postgres

This service creates a PostgreSQL container using the postgres:10 image. It is configured with the following properties:

• restart: always - The container will automatically restart if it stops for any reason.
• environment - Defines environment variables for the container, including the PostgreSQL username and password.
• healthcheck - Performs a health check on the container by running pg_isready command. The health check interval is set to 5 seconds, timeout to 10 seconds, and retries to 3.
• tmpfs - Mounts a temporary file system on the container's /var/lib/postgresql/data directory.
• ports - Maps port 44447 on the host to the default PostgreSQL port 5432 on the container.

start_dependencies

This service uses the mattermost/mattermost-wait-for-dep:latest image. It depends on the postgres service, so it will wait for the PostgreSQL container to start before executing its command. The command postgres:5432 in this container serves as a placeholder.

version: '2.4'
services:
  postgres:
    image: "postgres:10"
    restart: always
    environment:
      POSTGRES_USER: mmuser
      POSTGRES_PASSWORD: mostest
    healthcheck:
      test: [ "CMD", "pg_isready", "-h", "localhost" ]
      interval: 5s
      timeout: 10s
      retries: 3
    tmpfs: /var/lib/postgresql/data
    ports:
      - 44447:5432

  start_dependencies:
    image: mattermost/mattermost-wait-for-dep:latest
    depends_on:
      - postgres
    command: postgres:5432