Cannot connect to the Docker daemon on bash on Ubuntu windows

bash docker windows-subsystem-for-linux
Zakaria Shahed picture Zakaria Shahed · Jan 1, 2018 · Viewed 41.7k times · Source

I am able to install docker, docker-compose and docker-machine

However when I try to run

root@DESKTOP-51NFMIM:~# docker ps
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

Is there any suggestion for solving this problem?

Answer

Rami Sarieddine picture Rami Sarieddine · Jan 29, 2018

Found the solution on this post: https://blog.jayway.com/2017/04/19/running-docker-on-bash-on-windows/

Running docker against an engine on a different machine is actually quite easy, as Docker can expose a TCP endpoint which the CLI can attach to.

This TCP endpoint is turned off by default; to activate it, right-click the Docker icon in your taskbar and choose Settings, and tick the box next to “Expose daemon on tcp://localhost:2375 without TLS”.

With that done, all we need to do is instruct the CLI under Bash to connect to the engine running under Windows instead of to the non-existing engine running under Bash, like this:

$ docker -H tcp://0.0.0.0:2375 images

There are two ways to make this permanent – either add an alias for the above command or export an environment variable which instructs Docker where to find the host engine (NOTE: make sure to use single apostrophe's below):

$ echo "export DOCKER_HOST='tcp://0.0.0.0:2375'" >> ~/.bashrc
$ source ~/.bashrc

Now, running docker commands from Bash works just like they’re supposed to.

$ docker run hello-world

Successful response:

Hello from Docker!This message shows that your installation appears to be working correctly.

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