Docker 101: The Basics
I. How To Install Docker on Fedora 20
How To List and Attach to Docker Containers
How to Commit Changes and Create Docker Images
How to View Logs for a Docker Container
Docker is a container-based software framework for automating deployment of applications. “Containers” are encapsulated, lightweight, and portable application modules.
- These instructions are intended for installing Docker.
- I’ll be working from a Liquid Web Self Managed Fedora 20 server, and I’ll be logged in as root.
Step 1: Install Docker on Fedora 20
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
Let’s begin using Docker! Download the fedora Docker image:
docker pull fedora
Step 3: Run a Docker Container
Now, to setup a 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 container.
docker run -i -t fedora /bin/bash
That’s it! You’re now using a bash shell inside of a fedora docker container.
To disconnect, or detach, from the shell without exiting use the escape sequence Ctrl-p + Ctrl-q.
There are many community containers already available, which can be found through a search. In the command below I am searching for the keyword fedora:
docker search fedora