Data

Volumes

Volumes is a place to persist data.

If the container is destroyed, the data in volumes will be perserved. If we need to remove a volume, we need to delete it manually.

named volume

Docker will create a place on the host for the volume. Usually, we will give a volume a name.

In docker container run, we can use -v:

• create a new volumes for the container

• use an existed volumes

example: -v <custom_name>:<container_path>

bind mounts

With bind mounts, we control the exact mountpoint on the host.

We can use this to persist data, but is often used to provide additional data into containers.

-v <host_path>:<container_path> will bind mount host files in container. Always host file overrides container files.