53 lines
2.1 KiB
Markdown
53 lines
2.1 KiB
Markdown
# Install Latest Docker Service
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Docker included with some distributions lags far behind upstream. This guide aims to provide a quick and reliable way to install or update it.
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It is recommended to use platforms that support systemd as future versions of this docker image may require systemd to help with some tasks:
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* Fedora
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* Debian 8.1+
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## Debian / Ubuntu
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### Step 1 — Set Up Docker
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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. For Debian Jessie users, just install docker.io from jessie-backports.
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Ensure dependencies are installed:
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sudo apt-get update && sudo apt-get install -y apt-transport-https curl
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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:
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curl -L https://get.docker.com/gpg | sudo apt-key add -
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Add the upstream Docker repository to the system list:
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echo deb https://get.docker.io/ubuntu docker main | sudo tee /etc/apt/sources.list.d/docker.list
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Update the package list and install the Docker package:
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sudo apt-get update && sudo apt-get install -y lxc-docker
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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:
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sudo usermod -aG docker $USER
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After **re-logging in** verify the group membership using the id command. The expected response should include docker like the following example:
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uid=1001(test0) gid=1001(test0) groups=1001(test0),27(sudo),999(docker)
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### Step 2 — Test Docker
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Run a Debian jessie docker container:
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docker run --rm -it debian:jessie bash -l
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Once inside the container you'll see the `root@<container id>:/#` 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:
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cat /etc/issue.net
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Expected result:
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Debian GNU/Linux 8
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