Docker installation on Ubuntu 16.04.2 with TCP API

1. Install of Ubuntu 16.04.2.
2. Follow the instructions on https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-16-04
4. Modify /lib/systemd/system/docker.service change:
• ExecStart=/usr/bin/dockerd fd://        ....to
• ExecStart=/usr/bin/dockerd -H fd:// -H tcp://0.0.0.0:2375
5. Modify /etc/init.d/docker change:
1. DOCKER_OPTS=
2. DOCKER_OPTS="-H tcp://0.0.0.0:2375"

Restart docker with:

• sudo service docker restart

You will see:

Warning: docker.service changed on disk. Run 'systemctl daemon-reload' to reload units.

Do this as instructed:

• systemctl daemon-reload

==== AUTHENTICATING FOR org.freedesktop.systemd1.reload-daemon ===

Authentication is required to reload the systemd state.

Authenticating as: David Bond,,, (david)

Password:

==== AUTHENTICATION COMPLETE ===

Then restart again

• sudo service docker restart

Check that docker is still available from the command line:

• docker version

Client:

 Version:      17.06.0-ce

 API version:  1.30

 Go version:   go1.8.3

 Git commit:   02c1d87

 Built:        Fri Jun 23 21:23:31 2017

 OS/Arch:      linux/amd64

Server:

 Version:      17.06.0-ce

 API version:  1.30 (minimum version 1.12)

 Go version:   go1.8.3

 Git commit:   02c1d87

 Built:        Fri Jun 23 21:19:04 2017

 OS/Arch:      linux/amd64

 Experimental: false

Check that the TCP socket is open for requests:

• curl http://localhost:2375/version

You will see:

{"Version":"17.06.0-ce","ApiVersion":"1.30","MinAPIVersion":"1.12","GitCommit":"02c1d87","GoVersion":"go1.8.3","Os":"linux","Arch":"amd64","KernelVersion":"4.8.0-36-generic","BuildTime":"2017-06-23T21:19:04.990631145+00:00"}