如何在docker-compose 3中使用docker deploy？

Question

When I make command sudo docker stack deploy -c docker-compose.yml test

Ignoring unsupported options: build, external_links, links, restart

Updating service test_cache (id: me2vh1lffrl4ppzomphin167la)
Updating service test_lb (id: ycnne1ifpt517wdbfdg1g5tlup)
Updating service test_media (id: rr3ural9hjz0mw6hjx7n2vywm)
Creating service test_web

Error response from daemon: rpc error: code = 3 desc = ContainerSpec: image reference must be provided

And I get this error - Error response from daemon: rpc error: code = 3 desc = ContainerSpec: image reference must be provided

But I create image for this container.

Answer 1

Your compose.yml file does not include an image section which is required by docker stack deploy . You should also be pushing these images to a registry server if you are deploying them to a swarm since docker uses pinning to the sha256 of the image in the registry to ensure all nodes run the same image. And since swarm does not build the images, any node without the image included locally will not be able to run this image unless it's pulled from a registry.

Answer 2

This is late, but I'd like to say that I got this error when I had a comment in the docker-compose.yml file, like this:

version: "3"
services:
  web:
    # pull the image from repository
    image: myname/docker-private:testproj
    ...

However, the comment needs to start at the first character of the line:

version: "3"
services:
  web:
# pull the image from repository
    image: myname/docker-private:testproj
    ...

This fixed the problem.