Enable Docker Remote API - raspberry pi / raspbian

My starting point is:

How to use docker remote api to create container?,

so I edit /etc/init/docker.conf and update 2 occurrences of the DOCKER_OPTS variable to:

DOCKER_OPTS='-H tcp://0.0.0.0:4243 -H unix:///var/run/docker.sock'

Then, a simple test to list docker images fails:

$ service docker restart
$ curl -X GET http://10.143.0.218:4243/images/json
curl: (7) Failed to connect to 10.143.0.218 port 4243: Connection refused

Docker version is:

$ sudo docker version
Client:
 Version:      1.12.3
 API version:  1.24
 Go version:   go1.6.3
 Git commit:   6b644ec
 Built:        Wed Oct 26 19:06:36 2016
OS/Arch:      linux/arm

Server:
 Version:      1.12.3
 API version:  1.24
 Go version:   go1.6.3
 Git commit:   6b644ec
 Built:        Wed Oct 26 19:06:36 2016
 OS/Arch:      linux/arm

Solution

Not tested this, but if it's Jessie, then it uses systemd by default as the init system iirc, and this has implications for how the daemon (dockerd) is configured and started.

So you're editing the /etc/init/docker.conf file but I don't think that's being read / used.

Take a read of this article on different startup procedures on each init system in Docker, and this for specific systemd configuration.