Intro to volumes and storage.

TL;DR Overview of how docker storage & volumes work and how to manage them.

In this fourth part of the Dockerventure series, we are going to focus on how docker handles storage, how it manages container file systems, and showcase how we can effectively manage our data with volumes.

Check here for the first 3 parts: Intro Docker, Dockerfiles, Useful Docker commands.

Default Docker File System

By default at creation time, docker creates the directory /var/lib/docker where it stores all its data regarding containers, images, volumes, etc.

When a new container is started, a new **read-write container layer **is added on top of the read-only image layers that were created during the build phase.

This container layer exists only while the container exists and when the container is killed this layer along with all the changes we made on top is lost.

#docker-mount #docker-volume #docker-storage #docker