Docker Kata 3: Container Volumes and File System

Docker containers use an internal file system that’s isolated from the host and other containers. This kata will teach us what happens when we make changes to a container file system. We’ll also learn how to create volumes that can be shared between containers and their hosts and between other containers.

Step 1: Make container file system changes

The command to stop and remove all the containers is given below.

Note: The container IDs we see will be different.

The output will be something like this:

The command to run the ubuntu container and execute the bash shell is given below.

After running the command above, the output will be something like this:

This command runs an Ubuntu container and executes the Bash shell.

The command to create and list the file in the root of the container is given below.

The output will be something like this:

This sequence of commands creates a new file in the root of the container called file1.txt. The ls command displays the file. The exit command terminates the bash program, which exits the container.

The command to run the second Ubuntu container is given below.

After running the command above, the output displayed will be something like this:

This command runs a second Ubuntu container and ...