Run docker command into node container

Question

I have a nodejs application inside a docker containter, and I'm trying to run another docker image from the container.

I connected the docker socket to the container, ran the machine, and I went into the containter.

docker run -it  -v /var/run/docker.sock:/var/run/docker.sock  -w /root node bash

When I write in the terminal docker I get an error: bash: docker: command not found.

It happens precisely in the specific image of NodeJS, if for example I run such a test

docker run -v /var/run/docker.sock:/var/run/docker.sock \
            -ti docker

It works great.

Why can't I run docker in the node image?

The question is not quite clear, further clarification needed. You have build a docker image with your nodejs app, you start an 'instance' of docker image and it became, so to say, docker container. You may start another docker container with different port mapping from you docker image, this works. But what is the reason of trying to run a docker inside a container you started? — m19v
– m19v, Commented Sep 20, 2022 at 19:13
Do you want a nested container? Or to started another docker container from docker image is your intention? — m19v
– m19v, Commented Sep 20, 2022 at 19:15
@m19v The code I gave is just an example, I have a container with an active Node app, I don't need a child image but a sister images — ABE
– ABE, Commented Sep 20, 2022 at 19:49

YJR · Accepted Answer · 2022-09-20 19:37:00Z

1

This not work because to mount sockets nodejs container must include a docker instance inside it. Just try another general image other than docker. It also will not work. Search for nodejs images it self include docker. Use that then it will work.

If such image not exist you have to create new image from both docker and nodejs images and add command to start it.

edited Sep 20, 2022 at 19:37

answered Sep 20, 2022 at 19:19

YJR

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