services:
  promtail:
    image: grafana/promtail:latest
    container_name: promtail
    restart: unless-stopped
    hostname: ${HOSTNAME}
    environment:
      - HOSTNAME=${HOSTNAME}
    volumes:
      - ./config.yml:/etc/promtail/config.yml:ro
      - /var/log:/var/log:ro
      - /var/lib/docker/containers:/var/lib/docker/containers:ro
    command: -config.file=/etc/promtail/config.yml
    network_mode: host