Add volume API/CLI

Signed-off-by: Brian Goff <cpuguy83@gmail.com>

api/types/types.go

@@ -301,3 +301,24 @@ type MountPoint struct {
 	Mode        string
 	RW          bool
 }
+
+// Volume represents the configuration of a volume for the remote API
+type Volume struct {
+	Name       string // Name is the name of the volume
+	Driver     string // Driver is the Driver name used to create the volume
+	Mountpoint string // Mountpoint is the location on disk of the volume
+}
+
+// VolumesListResponse contains the response for the remote API:
+// GET "/volumes"
+type VolumesListResponse struct {
+	Volumes []*Volume // Volumes is the list of volumes being returned
+}
+
+// VolumeCreateRequest contains the response for the remote API:
+// POST "/volumes"
+type VolumeCreateRequest struct {
+	Name       string            // Name is the requested name of the volume
+	Driver     string            // Driver is the name of the driver that should be used to create the volume
+	DriverOpts map[string]string // DriverOpts holds the driver specific options to use for when creating the volume.
+}