Docker is not honoring configuration to listen on tcp socket

Asked by Daniel on 2019-10-11

I would like to configure docker to listen on port tcp://0.0.0.0:2375.
I have tried different configuration options like /etc/docker/daemon.json and /etc/default/docker with
DOCKER_OPTS="--host unix:///var/run/docker.sock --host tcp://0.0.0.0:2375 --dns 1.2.3.4"
but docker will never use the tcp settings.

The only way I have found that works is to change /etc/systemd/system/multi-user.target.wants/docker.service
BUT this file is replaced every time there is a new version.

What is the correct way to configure docker to listen on 'tcp://0.0.0.0:2375' and specify dns???

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Ubuntu docker Edit question
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Last query:
2019-10-11
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