Docker

Step 1: Install Docker on Fedora 21

• As a matter of best practice, we’ll update our packages:

yum update -y

• Let’s install Docker by installing the docker-io package:

yum -y install docker-io

• Once the installation completes, we’ll need to start the Docker daemon:

systemctl start docker

• And finally, and optionally, let’s configure Docker to start when the server boots:

systemctl enable docker

• Step 2: Download a Docker Container

docker pull marina/fedora21-i386

Step 3: Run a Docker Container

basic fedora container with a bash shell, we just run one command. docker run will run a command in a new container, -i attaches stdin and stdout, -t allocates a tty, and we’re using the standard fedora

docker run -i -t marina/fedora21-i386 /bin/bash

connect, or detach, from the shell without exiting use the escape sequence Ctrl-p + Ctrl-q.

sudo docker run -i -t -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix --rm marina/fedora21-i386 /bin/bash

Update image

sed -i 's/\$releasever/21/g;s/\$basearch/i386/g' /etc/yum.repos.d/*
yum clean all
yum -y update

• Search for images.

docker search fedora

attach container

List containers.

sudo docker ps
CONTAINER ID        IMAGE                        COMMAND             CREATED             STATUS              PORTS               NAMES
315ea401e287        marina/fedora21-i386:0.1.0   "/bin/bash"         About an hour ago   Up About an hour                        elated_nobel        

Connect container,

sudo docker attach 315ea401e287