synapse-docker-compose.yml

# Version 2 required in order to impose resource limits in Docker Compose (non-Swarm) environment
version: '2.2'

services:

  synapse:
    image: matrixdotorg/synapse:latest
    container_name: synapse
    # Since synapse does not retry to connect to the database, restart upon failure
    restart: unless-stopped
    environment:
      - SYNAPSE_CONFIG_PATH=/data/homeserver.yaml
    volumes:
      - ./files:/data
    depends_on:
      - db
    ports:
      - 8008:8008
    # Resource limits
    #cpus: 0.5
    mem_limit: 1536m
    memswap_limit: 8G

  db:
    image: postgres:12-alpine
    container_name: synapse_db
    restart: unless-stopped
    environment:
      - POSTGRES_USER=synapse
      - POSTGRES_PASSWORD=obviously not my actual password
      # Ensure the database gets created correctly
      # See: https://github.com/matrix-org/synapse/blob/master/docs/postgres.md#set-up-database
      - POSTGRES_INITDB_ARGS=--encoding=UTF-8 --lc-collate=C --lc-ctype=C
    volumes:
      - ./schemas:/var/lib/postgresql/data