Restart entire docker compose stack from one of the containers-CodePudding

Is there any proper way of restarting an entire docker compose stack from within one of its containers?

One workaround involves mounting the docker socket:

volumes:
  - /var/run/docker.sock:/var/run/docker.sock

and then use the Docker Engine SDKs (https://docs.docker.com/engine/api/sdk/examples/).

However, this solution only allows restarting the containers itselves. There seems to be no way to send compose commands, like docker compose restart, docker compose up, etc.

The only solution I've found to send docker compose commands is to open a terminal on the host from the container using ssh, like this: access host's ssh tunnel from docker container

This is partly related to How to run shell script on host from docker container? , but I'm actually looking for a more specific solution to only send docker compose commands.

CodePudding user response：

I tried with this simple docker-compose.yml file

version: '3'
services:
  nginx:
    image: nginx
    ports:
      - 3000:80

Then I started a docker container using

docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock -v $(pwd):/work docker

Then, inside the container, I did

cd /work
docker-compose up -d

and it started the container up on the host.

Please note that you have an error in your socket mapping. It needs to be

- /var/run/docker.sock:/var/run/docker.sock

(you have a period instead of a slash at one point)

CodePudding user response：

As mentioned by @BMitch in the comments, compose project name was the reason why I wasn't able to run docker compose commands inside the running container.

By default the compose project name is set to the directory name, so if the docker-compose.yml is run from a host directory named folder1, then the commands inside the container should be run as:

docker-compose -p folder1 ...

So now, for example, restarting the stack works:

docker-compose -p folder1 restart

Just as a reference, a fixed project name for your compose can be set using name: ... as a top-level attribute of the .yml file, but requires docker compose v2.3.3 : Set $PROJECT_NAME in docker-compose file