Remote Docker only Binds to tcp6

144 views Asked by Joseph Adam At 04 May 2023 at 09:44

So I wanted to enable remote docker, to use the API for the daemon from outside the host.

My /etc/docker/daemon.json looks like this:

{
  "hosts": ["tcp://0.0.0.0:2375", "unix:///var/run/docker.sock"]
}

And my /etc/systemd/system/docker.service.d/options.conf looks like this:

[Service]
ExecStart=
ExecStart=/usr/bin/dockerd

When i try to list all Containers using the curl command on the host with localhost it works:

curl localhost:2375/v1.38/containers/json

i get a json-list of all Containers. []

But if i try using:

curl 10.1.44.11:2375/v1.38/containers/json

i only get a empty json back: []

when i run:

sudo netstat -ltnp | grep dockerd

I get:

tcp6 0 0 :::2375 :::* LISTEN xxx/dockerd

I am kind of confused why it show tcp6 instead of tcp.

can someone help?

TechQA.