docker-hostsfile/docker-compose.yml at main · newdave/docker-hostsfile · GitHub

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version: '3.8'

services:
  hosts-updater:
    image: python:3.12-slim
    container_name: docker-hosts-updater
    restart: unless-stopped
    network_mode: host

    volumes:
      # Docker socket for monitoring (read-only for security)
    - /var/run/docker.sock:/var/run/docker.sock:ro
      # Host's /etc/hosts file
    - /etc/hosts:/etc/hosts
      # The updater script
    - ./src/docker_hosts_updater.py:/app/updater.py:ro

    # Command with optional domain override
    # Option 1: Use environment variable (see below)
    command: python /app/updater.py 30s

    # Option 2: Specify domain via command line
    # command: python /app/updater.py 30s --domain example.com

    # Required for modifying /etc/hosts
    cap_add:
    - NET_ADMIN

    # Optional: limit resources
    mem_limit: 256m
    cpus: 0.5

    # Environment variables (optional customization)
    environment:
    - PYTHONUNBUFFERED=1
      # Set custom domain base for FQDNs (default: base.domain)
    - DOCKER_HOSTS_DOMAIN=base.domain
      # Uncomment to use a different domain:
      # - DOCKER_HOSTS_DOMAIN=example.com
      # - DOCKER_HOSTS_DOMAIN=local.dev

    logging:
      driver: json-file
      options:
        max-size: 10m
        max-file: '3'