DevOps: Puppet, Docker, and Kubernetes

Starting a container

Once we have images, we can use them to start the containers. In this recipe, we will start a container with the fedora:latest image and see what all things happen behind the scene.

Getting ready

Make sure the Docker daemon is running on the host and you can connect through the Docker client.

How to do it…

1. The syntax used to start a container is as follows:

   docker run [ OPTIONS ]  IMAGE[:TAG]  [COMMAND]  [ARG...] 
   

Here is an example of a command:

$ docker run -i -t --name=f21 fedora /bin/bash

By default, Docker picks the image with the latest tag:

• The -i option starts the container in the interactive mode
• The -t option allocates a pseudo-tty and attaches it to the standard input

So, with the preceding command, we start a container from ...