myos/stack/host/certbot.yml

version: '3.6'

services:
  certbot:
    build:
      args:
      - DOCKER_BUILD_DIR=docker/certbot
      context: ../..
      dockerfile: docker/certbot/Dockerfile
    command: start
    container_name: ${HOST_COMPOSE_PROJECT_NAME}-certbot
    domainname: ${DOMAINNAME}
    extra_hosts:
    - consul:${DOCKER_INTERNAL_DOCKER_HOST}
    - ${HOSTNAME}.${DOMAINNAME} ${HOSTNAME}:${DOCKER_HOST_INET4}
    hostname: ${HOSTNAME}
    image: ${HOST_DOCKER_REPOSITORY}/certbot:${DOCKER_IMAGE_TAG}
    network_mode: host
    restart: always
    volumes:
    - host:/etc/letsencrypt

volumes:
  host:
    external: true
    name: ${HOST_DOCKER_VOLUME}