Bug 1914096

Document URL: 
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/building_running_and_managing_containers/working-with-containers-and-pods_building-running-and-managing-containers#sharing-files-between-two-containers_building-running-and-managing-containers

Section Number and Name: 
3.4. Sharing files between two containers

Describe the issue: 
Step 2 shows how to save the mount point path to the variable for easier manipulation: $ mntPoint=$(podman volume inspect hostvolume --format {{.Mountpoint}}). This variable is beeing used in steps 5 and 10 to mount the volume into a container.

Using the volume path instead of the volume name to mount a volume into a container causes data loss when some is running `podman volume prune` to remove unused volumes. Because `podman volume prune` is not able to recognize that the volume is being in use when it was mounted using the path instead of the name.

Suggestions for improvement: 
Instead of the variable $mntPoint use the volume name 'hostvolume' from step 1 in the code blocks from step 5 and 10.

Maybe you could insert some kind of information or warning box informing about the possible danger of using the volumes path instead of its name when mounting it into a container.

This would prevent users who follow the procedure to the letter from experiencing data loss when running `podman volume prune` like I did.

Additional information: 
See Support Case 02838634 or Github [issue 7862](https://github.com/containers/podman/issues/7862) in case you need further technical detail on this.