Node Cookbook - Third Edition

Saving container state

What if we want to persist our changes to a container? We can do that too.

Assuming we've been following along in the previous section (Entering a containers shell environment) let's exit from the Mongo container and execute the following commands on the host system:

$ docker commit <container id> mymongo$ docker images

We can now see a fresh container image named mymongo in the Docker image list. This technique can be useful. For example, creating a database container with pre-populated test data for sharing among a development team.