用新镜像重启 Docker 容器

Question

One of my Docker Containers can update itself (talking to the Docker Daemon using the Spotify Docker Client). After downloading the new image a container restart is required, with the new iamge of course.

If I just kill the running process inside the container, Docker restarts it using the old image. Is there any reliable way to force recreating the container using the new image? Couldn't find anything in the docker-compose docs. It's a single host environment only, no Kubernetes or something like that in use.

Compose file snippet:

  dockerctl:
    image: myimage
    container_name: dockerctl
    networks:
      - mynetwork
    ports:
      - "8099:8080"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    restart: always

Answer 1

Bit of an old question, but this should do it: Update the image name in your docker-compose.yml and restart it by running docker-compose up -d --no-deps dockerctl .