Add documentation on options to volume create manpage
Document the rough equivalence between our option types and the
various parts of the mount command. Amend examples a bit to cover
this.
@@ -30,6 +30,13 @@ Set metadata for a volume (e.g., --label mykey=value).
**-o**, **--opt**=*option*
Set driver specific options.
+For the default driver, `local`, this allows a volume to be configured to mount a filesystem on the host.
+For the `local` driver the following options are supported: `type`, `device`, and `o`.
+The `type` option sets the type of the filesystem to be mounted, and is equivalent to the `-t` flag to **mount(8)**.
+The `device` option sets the device to be mounted, and is equivalent to the `device` argument to **mount(8)**.
+The `o` option sets options for the mount, and is equivalent to the `-o` flag to **mount(8)** with two exceptions.
+The `o` option supports `uid` and `gid` options to set the UID and GID of the created volume that are not normally supported by **mount(8)**.
+Using volume options with the `local` driver requires root privileges.
## EXAMPLES
@@ -40,11 +47,13 @@ $ podman volume create
$ podman volume create --label foo=bar myvol
-$ podman volume create --opt device=tmpfs --opt type=tmpfs --opt o=nodev,noexec myvol
+# podman volume create --opt device=tmpfs --opt type=tmpfs --opt o=nodev,noexec myvol
+
+# podman volume create --opt device=tmpfs --opt type=tmpfs --opt o=uid=1000,gid=1000 testvol
```
## SEE ALSO
-podman-volume(1)
+podman-volume(1), mount(8)
## HISTORY
November 2018, Originally compiled by Urvashi Mohnani <umohnani@redhat.com>
