Add "podman volume" command

Add support for podman volume and its subcommands.
The commands supported are:
	podman volume create
	podman volume inspect
	podman volume ls
	podman volume rm
	podman volume prune

This is a tool to manage volumes used by podman. For now it only handle
named volumes, but eventually it will handle all volumes used by podman.

Signed-off-by: umohnani8 <umohnani@redhat.com>

6 files changed, 248 insertions, 0 deletions

diff --git a/docs/podman-volume-create.1.md b/docs/podman-volume-create.1.md
new file mode 100644
index 000000000..795d7b449
--- /dev/null
+++ b/docs/podman-volume-create.1.md
@@ -0,0 +1,48 @@
+% podman-volume-create(1)
+
+## NAME
+podman\-volume\-create - Create a new volume
+
+## SYNOPSIS
+**podman volume create** [*options*]
+
+## DESCRIPTION
+
+Creates an empty volume and prepares it to be used by containers. The volume
+can be created with a specific name, if a name is not given a random name is
+generated. You can add metadata to the volume by using the **--label** flag and
+driver options can be set using the **--opt** flag.
+
+## OPTIONS
+
+**--driver**=""
+
+Specify the volume driver name (default local).
+
+**--help**
+
+Print usage statement
+
+**-l**, **--label**=[]
+
+Set metadata for a volume (e.g., --label mykey=value).
+
+**-o**, **--opt**=[]
+
+Set driver specific options.
+
+## EXAMPLES
+
+```
+$ podman volume create myvol
+
+$ podman volume create
+
+$ podman volume create --label foo=bar myvol
+```
+
+## SEE ALSO
+podman-volume(1)
+
+## HISTORY
+November 2018, Originally compiled by Urvashi Mohnani <umohnani@redhat.com>
diff --git a/docs/podman-volume-inspect.1.md b/docs/podman-volume-inspect.1.md
new file mode 100644
index 000000000..6d5b184ee
--- /dev/null
+++ b/docs/podman-volume-inspect.1.md
@@ -0,0 +1,45 @@
+% podman-volume-inspect(1)
+
+## NAME
+podman\-volume\-inspect - Inspect one or more volumes
+
+## SYNOPSIS
+**podman volume inspect** [*options*]
+
+## DESCRIPTION
+
+Display detailed information on one or more volumes. The output can be formated using
+the **--format** flag and a Go template. To get detailed information about all the
+existing volumes, use the **--all** flag.
+
+
+## OPTIONS
+
+**-a**, **--all**=""
+
+Inspect all volumes.
+
+**--format**=""
+
+Format volume output using Go template
+
+**--help**
+
+Print usage statement
+
+
+## EXAMPLES
+
+```
+$ podman volume inspect myvol
+
+$ podman volume inspect --all
+
+$ podman volume inspect --format "{{.Driver}} {{.Scope}}" myvol
+```
+
+## SEE ALSO
+podman-volume(1)
+
+## HISTORY
+November 2018, Originally compiled by Urvashi Mohnani <umohnani@redhat.com>
diff --git a/docs/podman-volume-ls.1.md b/docs/podman-volume-ls.1.md
new file mode 100644
index 000000000..c061e27fe
--- /dev/null
+++ b/docs/podman-volume-ls.1.md
@@ -0,0 +1,49 @@
+% podman-volume-ls(1)
+
+## NAME
+podman\-volume\-ls - List volumes
+
+## SYNOPSIS
+**podman volume ls** [*options*]
+
+## DESCRIPTION
+
+Lists all the volumes that exist. The output can be filtered using the **--filter**
+flag and can be formatted to either JSON or a Go template using the **--format**
+flag. Use the **--quiet** flag to print only the volume names.
+
+## OPTIONS
+
+**--filter**=""
+
+Filter volume output.
+
+**--format**=""
+
+Format volume output using Go template.
+
+**--help**
+
+Print usage statement.
+
+**-q**, **--quiet**=[]
+
+Print volume output in quiet mode. Only print the volume names.
+
+## EXAMPLES
+
+```
+$ podman volume ls
+
+$ podman volume ls --format json
+
+$ podman volume ls --format "{{.Driver}} {{.Scope}}"
+
+$ podman volume ls --filter name=foo,label=blue
+```
+
+## SEE ALSO
+podman-volume(1)
+
+## HISTORY
+November 2018, Originally compiled by Urvashi Mohnani <umohnani@redhat.com>
diff --git a/docs/podman-volume-prune.1.md b/docs/podman-volume-prune.1.md
new file mode 100644
index 000000000..a06bb2fa4
--- /dev/null
+++ b/docs/podman-volume-prune.1.md
@@ -0,0 +1,38 @@
+% podman-volume-prune(1)
+
+## NAME
+podman\-volume\-prune - Remove all unused volumes
+
+## SYNOPSIS
+**podman volume rm** [*options*]
+
+## DESCRIPTION
+
+Removes all unused volumes. You will be prompted to confirm the removal of all the
+unused volumes. To bypass the confirmation, use the **--force** flag.
+
+
+## OPTIONS
+
+**-f**, **--force**=""
+
+Do not prompt for confirmation.
+
+**--help**
+
+Print usage statement
+
+
+## EXAMPLES
+
+```
+$ podman volume prune
+
+$ podman volume prune --force
+```
+
+## SEE ALSO
+podman-volume(1)
+
+## HISTORY
+November 2018, Originally compiled by Urvashi Mohnani <umohnani@redhat.com>
diff --git a/docs/podman-volume-rm.1.md b/docs/podman-volume-rm.1.md
new file mode 100644
index 000000000..c23d7675c
--- /dev/null
+++ b/docs/podman-volume-rm.1.md
@@ -0,0 +1,45 @@
+% podman-volume-rm(1)
+
+## NAME
+podman\-volume\-rm - Remove one or more volumes
+
+## SYNOPSIS
+**podman volume rm** [*options*]
+
+## DESCRIPTION
+
+Removes one ore more volumes. Only volumes that are not being used will be removed.
+If a volume is being used by a container, an error will be returned unless the **--force**
+flag is being used. To remove all the volumes, use the **--all** flag.
+
+
+## OPTIONS
+
+**-a**, **--all**=""
+
+Remove all volumes.
+
+**-f**, **--force**=""
+
+Remove a volume by force, even if it is being used by a container
+
+**--help**
+
+Print usage statement
+
+
+## EXAMPLES
+
+```
+$ podman volume rm myvol1 myvol2
+
+$ podman volume rm --all
+
+$ podman volume rm --force myvol
+```
+
+## SEE ALSO
+podman-volume(1)
+
+## HISTORY
+November 2018, Originally compiled by Urvashi Mohnani <umohnani@redhat.com>
diff --git a/docs/podman-volume.1.md b/docs/podman-volume.1.md
new file mode 100644
index 000000000..ac32abbd6
--- /dev/null
+++ b/docs/podman-volume.1.md
@@ -0,0 +1,23 @@
+% podman-volume(1)
+
+## NAME
+podman\-volume - Simple management tool for volumes.
+
+## SYNOPSIS
+**podman volume** *subcommand*
+
+## DESCRIPTION
+podman volume is a set of subcommands that manage volumes.
+
+## SUBCOMMANDS
+
+| Subcommand                                             | Description                                                                    |
+| -------------------------------------------------      | ------------------------------------------------------------------------------ |
+| [podman-volume-create(1)](podman-volume-create.1.md)   | Create a new volume.                                                           |
+| [podman-volume-inspect(1)](podman-volume-inspect.1.md) | Get detailed information on one or more volumes.                               |
+| [podman-volume-ls(1)](podman-volume-ls.1.md)           | List all the available volumes.                                                |
+| [podman-volume-rm(1)](podman-volume-rm.1.md)           | Remove one or more volumes.                                                    |
+| [podman-volume-prune(1)](podman-volume-prune.1.md)     | Remove all unused volumes.                                                     |
+
+## HISTORY
+November 2018, Originally compiled by Urvashi Mohnani <umohnani@redhat.com>