#Docker: Install the new Docker CE in experimental mode on Fedora Linux

There is a new Docker version released in march see Docker: New Docker release. There are some important changes, but the cool ones are in the experimental mode:
– you no longer need docker-machine for lots of stuff
– a new way to create Docker swarms
– a new docker-compose, version 3 that supports automatic creation and deployment of containers on Docker swarms (how cool is that 🙂 )
– Docker cloud free account to which you can link your own docker swarms.
– free public/private repository on docker cloud

Do the following to update to the new Docker CE experimental on fedora Linux

STEP 1: Uninstall the old docker

# dnf remove docker \
      docker-common \
      container-selinux \
      docker-selinux \
      docker-engine

Note: The contents of /var/lib/docker/, including images, containers, volumes, and networks, are preserved and saved under /var/lib/docker_old

STEP 2: Add the Docker CE repo to Fedora

dnf config-manager \
    --add-repo \
    https://download.docker.com/linux/fedora/docker-ce.repo

STEP 3: Install Docker CE

dnf install docker-ce

Important: If you want to recover all your images and containers just copy back the content of /var/lib/docker_old to the new /var/lib/docker directory.

STEP 4: Enable experimental mode
Create if not exist the configuration file /etc/docker/daemon.json with the following content:

{
    "experimental": true
}

STEP 5: Start Docker daemon

systemctl start docker

STEP 6: Test if experimental mode is enabled

# docker version -f '{{.Server.Experimental}}'

If the result is true than we have a docker engine running with experimental mode on.

See the next post where I create a Docker Swarm using experimental mode Create and manage a Docker Swarm with Docker CE and register it to Docker Cloud

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