--volumes-from[=CONTAINER[:OPTIONS]]
Mount volumes from the specified container(s). Used to share volumes between containers. The options is a comma-separated list with the following available elements:
rw|ro
z
To change a label in the container context, you can add z to the volume mount. This suffix tells Podman to relabel file objects on the shared volumes. The z option tells Podman that two containers share the volume content. As a result, Podman labels the content with a shared content label. Shared volume labels allow all containers to read/write content.