From 155c4d4b904033b23ad45c040e989c7554dbfd8e Mon Sep 17 00:00:00 2001 From: Kyle Manna Date: Sun, 5 Jul 2015 21:46:30 -0700 Subject: [PATCH] docs: docker: Crash course on installation * Nothing less nothing more. --- docs/docker.md | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 docs/docker.md diff --git a/docs/docker.md b/docs/docker.md new file mode 100644 index 0000000..0538b16 --- /dev/null +++ b/docs/docker.md @@ -0,0 +1,48 @@ +# Install Latest Docker Service + +Docker included with some distributions lags far behind upstream. This guide aims to provide a quick and reliable way to install or update it. + +It is recommended to use platforms that support systemd as future versions of this docker image may require systemd to help with some tasks: + +* Fedora +* Debian 8.1+ + +## Debian / Ubuntu + +### Step 1 — Set Up Docker + +Docker is moving fast and Debian / Ubuntu's long term support (LTS) policy doesn't keep up. To work around this we'll install a PPA that will get us the latest version of Docker. + +Add the upstream Docker repository package signing key. The apt-key command uses elevated privileges via sudo, so a password prompt for the user's password may appear: + + curl https://get.docker.io/gpg | sudo apt-key add - + +Add the upstream Docker repository to the system list: + + echo deb http://get.docker.io/ubuntu docker main | sudo tee /etc/apt/sources.list.d/docker.list + +Update the package list and install the Docker package: + + sudo apt-get update && sudo apt-get install -y lxc-docker + +Add your user to the `docker` group to enable communication with the Docker daemon as a normal user, where `$USER` is your username. Exit and log in again for the new group to take effect: + + sudo usermod -aG docker $USER + +After **re-logging in** verify the group membership using the id command. The expected response should include docker like the following example: + + uid=1001(test0) gid=1001(test0) groups=1001(test0),27(sudo),999(docker) + +### Step 2 — Test Docker + +Run a Debian jessie docker container: + + docker run --rm -it debian:jessie bash -l + +Once inside the container you'll see the `root@:/#` prompt signifying that the current shell is in a Docker container. To confirm that it's different from the host, check the version of Debian running in the container: + + cat /etc/issue.net + +Expected result: + + Debian GNU/Linux jessie/sid