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Alexander Shopov 9559f57463 Update fedora.md

Docker-DCO-1.1-Signed-off-by: Alexander Shopov <ash@kambanaria.org> (github: alshopov)

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Docker-DCO-1.1-Signed-off-by: Alexander Shopov <ash@kambanaria.org> (github: )

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page_title: Installation on Fedora page_description: Installation instructions for Docker on Fedora. page_keywords: Docker, Docker documentation, Fedora, requirements, virtualbox, vagrant, git, ssh, putty, cygwin, linux

Fedora

Docker is available in Fedora 19 and later. Please note that due to the current Docker limitations Docker is able to run only on the 64 bit architecture.

Installation

The docker-io package provides Docker on Fedora.

If you have the (unrelated) docker package installed already, it will conflict with docker-io. There's a bug report filed for it. To proceed with docker-io installation on Fedora 19, please remove docker first.

$ sudo yum -y remove docker

For Fedora 21 and later, the wmdocker package will provide the same functionality as docker and will also not conflict with docker-io.

$ sudo yum -y install wmdocker
$ sudo yum -y remove docker

Install the docker-io package which will install Docker on our host.

$ sudo yum -y install docker-io

To update the docker-io package:

$ sudo yum -y update docker-io

Now that it's installed, let's start the Docker daemon.

$ sudo systemctl start docker

If we want Docker to start at boot, we should also:

$ sudo systemctl enable docker

Now let's verify that Docker is working.

$ sudo docker run -i -t fedora /bin/bash

Granting rights to users to use Docker

Fedora 19 and 20 shipped with Docker 0.11. The package has already been updated to 1.0 in Fedora 20. If you are still using the 0.11 version you will need to grant rights to users of Docker.

The docker command line tool contacts the docker daemon process via a socket file /var/run/docker.sock owned by group docker. One must be member of that group in order to contact the docker -d process.

$ usermod -a -G docker login_name

Adding users to the docker group is not necessary for Docker versions 1.0 and above.

HTTP Proxy

If you are behind a HTTP proxy server, for example in corporate settings, you will need to add this configuration in the Docker systemd service file.

Edit file /lib/systemd/system/docker.service. Add the following to section [Service] :

Environment="HTTP_PROXY=http://proxy.example.com:80/"

If you have internal Docker registries that you need to contact without proxying you can specify them via the NO_PROXY environment variable:

Environment="HTTP_PROXY=http://proxy.example.com:80/" "NO_PROXY=localhost,127.0.0.0/8,docker-registry.somecorporation.com"

Flush changes:

$ systemctl daemon-reload

Restart Docker:

$ systemctl start docker

What next?

Continue with the User Guide.

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