Marinus Klasen

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April 15, 2022

Accessing the Docker Engine API remotely

Marinus Klasen

I was digging into possibilities to manage docker containers remotely and it turns out, it’s not as difficult as you’d imagine. We just need to make a few small changes to access the Docker Engine API.

How to access the Docker Engine API remotely?

When you’re running Ubuntu (16.04+) you have to make a small change in /lib/systemd/system/docker.service

Open up docker.service

sudo nano /lib/systemd/system/docker.service

Find the ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock line, and add: -H tcp://0.0.0.0:4243.

Restart the docker service

sudo systemctl daemon-reload

sudo systemctl restart docker

Verify that it’s working

curl -X GET http://localhost:4243/images/json

And you’re good to go! You can now access the Docker Engine API remotely. This also means you’re in the danger zone. Make sure to put up adequate security!

About Marinus Klasen

Marinus has been working in software/web development for more than a decade. Since 2020 his attention shifted on sharing knowledge and developing products and tools for sharing knowledge.

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