Abraham Varricatt

Note To Self


Installing docker and docker-machine on Ubuntu

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I want to be able to quickly spin up game servers for small sessions and tear them down afterwards. Online investigation reveals that docker-machine paired with DigitalOcean as a provider might be just what is needed. That claim needs to be tested, but a pre-requisite is that the docker and docker-machine tools be available on the local system. This post will describe how to install them on an Ubuntu box.

Repository setup #

First we need to get all our dependencies installed,

$ sudo apt-get update

$ sudo apt-get install \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg-agent \
    software-properties-common

The purpose of installing the above is to allow the apt command to be able to fetch repositories over HTTPS. Next we need to grab Docker’s official GPG key,

$ curl -fsSL https://download.docker.com/linux/debian/gpg | sudo apt-key add -

It will be good to manually verify that we have the correct key with the following fingerprint = 9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88. We can search for installed fingerprints by the last few characters,

$ sudo apt-key fingerprint 0EBFCD88

pub   4096R/0EBFCD88 2017-02-22
    Key fingerprint = 9DC8 5822 9FC7 DD38 854A  E2D8 8D81 803C 0EBF CD88
uid                  Docker Release (CE deb) <[email protected]>
sub   4096R/F273FCD8 2017-02-22

Finally, we can use the following command to setup the stable repository,

$ sudo add-apt-repository \
    "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
    $(lsb_release -cs) \
    stable"

Installing Docker Engine #

With the above done, it becomes very straight-forward to install the docker engine with the following command,

$ sudo apt-get update
$ sudo apt-get install docker-ce docker-ce-cli containerd.io

Installing Docker Machine #

Strangely enough, the official suggestion is to download the Docker Machine binary and extract it to the user’s PATH via this command,

$ base=https://github.com/docker/machine/releases/latest/download &&
    curl -L $base/docker-machine-$(uname -s)-$(uname -m) >/tmp/docker-machine &&
    sudo mv /tmp/docker-machine /usr/local/bin/docker-machine &&
    chmod +x /usr/local/bin/docker-machine

At the time of typing, the lastest version for docker-machine is 0.16.2.