Persist Quiz

• A container's file system is read-write, but when you delete a container, and start a new one from the same image, that new container starts from scratch again with a copy of the image. All stateful changes are lost.
• A volume's file system is read-write, but it lives outside a single container. If a container uses a volume, then stateful changes can be persisted to the volume even if the container is deleted.

Volumes are often used by applications like Ghost, Grafana, or WordPress to persist data so that when a container is deleted and a new one is created the state of the application isn't lost. Containerized applications are typically thought of as ephemeral (temporary). If your application breaks just because you deleted and recreated a container... it's not a very good containerization!