Merge pull request #25604 from allencloud/add-missing-fields-in-volume-api

add fields in volume api for 1.24, 1.25
(cherry picked from commit a3432c2fdb)

Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au>

Conflicts:
	docs/reference/api/docker_remote_api_v1.25.md

docs/reference/api/docker_remote_api_v1.24.md

@@ -2906,7 +2906,9 @@ Return low-level information about the `exec` command `id`.
         {
           "Name": "tardis",
           "Driver": "local",
-          "Mountpoint": "/var/lib/docker/volumes/tardis"
+          "Mountpoint": "/var/lib/docker/volumes/tardis",
+          "Labels": null,
+          "Scope": "local"
         }
       ],
       "Warnings": []
@@ -2941,6 +2943,7 @@ Create a volume
         "com.example.some-label": "some-value",
         "com.example.some-other-label": "some-other-value"
       },
+      "Driver": "custom"
     }
 
 **Example response**:
@@ -2950,13 +2953,16 @@ Create a volume
 
     {
       "Name": "tardis",
-      "Driver": "local",
+      "Driver": "custom",
       "Mountpoint": "/var/lib/docker/volumes/tardis",
-      "Status": null,
+      "Status": {
+        "hello": "world"
+      },
       "Labels": {
         "com.example.some-label": "some-value",
         "com.example.some-other-label": "some-other-value"
       },
+      "Scope": "local"
     }
 
 **Status codes**:
@@ -2970,8 +2976,13 @@ Create a volume
 - **Driver** - Name of the volume driver to use. Defaults to `local` for the name.
 - **DriverOpts** - A mapping of driver options and values. These options are
     passed directly to the driver and are driver specific.
-- **Labels** - Labels to set on the volume, specified as a map: `{"key":"value" [,"key2":"value2"]}`
+- **Labels** - Labels to set on the volume, specified as a map: `{"key":"value","key2":"value2"}`
 
+**JSON fields in response**:
+
+Refer to the [inspect a volume](#inspect-a-volume) section or details about the
+JSON fields returned in the response.
+ 
 ### Inspect a volume
 
 `GET /volumes/(name)`
@@ -2989,12 +3000,16 @@ Return low-level information on the volume `name`
 
     {
         "Name": "tardis",
-        "Driver": "local",
+        "Driver": "custom",
         "Mountpoint": "/var/lib/docker/volumes/tardis/_data",
+        "Status": {
+          "hello": "world"
+        },
         "Labels": {
             "com.example.some-label": "some-value",
             "com.example.some-other-label": "some-other-value"
-        }
+        },
+        "Scope": "local"
     }
 
 **Status codes**:
@@ -3003,6 +3018,23 @@ Return low-level information on the volume `name`
 -   **404** - no such volume
 -   **500** - server error
 
+**JSON fields in response**:
+
+The following fields can be returned in the API response. Empty fields, or
+fields that are not supported by the volume's driver may be omitted in the
+response.
+
+- **Name** - Name of the volume.
+- **Driver** - Name of the volume driver used by the volume.
+- **Mountpoint** - Mount path of the volume on the host.
+- **Status** - Low-level details about the volume, provided by the volume driver.
+    Details are returned as a map with key/value pairs: `{"key":"value","key2":"value2"}`.
+    The `Status` field is optional, and is omitted if the volume driver does not
+    support this feature.
+- **Labels** - Labels set on the volume, specified as a map: `{"key":"value","key2":"value2"}`.
+- **Scope** - Scope describes the level at which the volume exists, can be one of
+    `global` for cluster-wide or `local` for machine level. The default is `local`.
+
 ### Remove a volume
 
 `DELETE /volumes/(name)`