Docker for Python get DOCKER_HOST

Question

I'm trying to find the DOCKER_HOST for my docker registry.

Looking at the sdk, I know it's possible to set the DOCKER_HOST.

But is it possible to find the current DOCKER_HOST been used?

import docker
client = docker.from_env()
client.info()

I suppose the current one would be in `os.environ['DOCKER_HOST']`. — Marco Bonelli, May 17 '22 at 23:14
I did try this: docker_host = os.environ['DOCKER_HOST'] and I got KeyError: DOCKER_HOST — user3292394, May 17 '22 at 23:26

score 1 · Answer 1 · answered May 17 '22 at 23:32

DOCKER_HOST is an optional value.

The default Docker host (and local registry) is a socket on localhost. I wouldn't expect that you'll find a DOCKER_HOST set unless you have chosen to set one.

Various things can override, however, so it really depends on your local environment and setup.

DOCKER_HOST value
DOCKER_CONTEXT value
A context set using the docker context command
A context set using the -c flag to the docker command

Reference (docs.docker.com)

Docker for Python get DOCKER_HOST

1 Answers1