Add method to get diagnostics for Server

lib/OpenCloud/Compute/Resource/Server.php

@@ -775,4 +775,25 @@ public function resume()
 
         return $this->action($object);
     }
+
+    /**
+     * Get server diagnostics
+     *
+     * Gets basic usage data for a specified server.
+     *
+     * @api
+     * @return object
+     */
+    public function diagnostics()
+    {
+        // The diagnostics is only available when the os-server-diagnostics extension is installed.
+        $this->checkExtension('os-server-diagnostics');
+
+        $url = $this->getUrl('diagnostics');
+
+        $response = $this->getClient()->get($url)->send();
+        $body = Formatter::decode($response);
+
+        return $body ?: (object) array();
+    }
 }

tests/OpenCloud/Tests/Compute/Resource/ServerTest.php

@@ -376,4 +376,14 @@ public function test_Create_With_Bootable_Volume_Delete_On_Termination()
         $this->assertEquals(0, $obj->boot_index);
         $this->assertEquals(true, $obj->delete_on_termination);
     }
+
+    public function test_Diagnostics()
+    {
+        $this->addMockSubscriber($this->getTestFilePath('Diagnostics'));
+        $diagnostics = $this->server->diagnostics();
+        $this->assertInternalType('object', $diagnostics);
+        $this->assertEquals(524288, $diagnostics->memory);
+        $this->assertEquals(-1, $diagnostics->vda_errors);
+        $this->assertEquals(662, $diagnostics->vnet1_tx_packets);
+    }
 }

tests/OpenCloud/Tests/Compute/_response/Diagnostics.resp

@@ -0,0 +1,24 @@
+HTTP/1.1 200 OK
+Date: Fri, 15 Nov 2013 14:12:58 GMT
+Content-Length: 1364
+Content-Type: application/json
+X-Compute-Request-Id: req-164dc435-90c2-48ce-9d69-96f170c518c8
+Server: Jetty(8.0.y.z-SNAPSHOT)
+
+{
+    "cpu0_time": 17300000000,
+    "memory": 524288,
+    "vda_errors": -1,
+    "vda_read": 262144,
+    "vda_read_req": 112,
+    "vda_write": 5778432,
+    "vda_write_req": 488,
+    "vnet1_rx": 2070139,
+    "vnet1_rx_drop": 0,
+    "vnet1_rx_errors": 0,
+    "vnet1_rx_packets": 26701,
+    "vnet1_tx": 140208,
+    "vnet1_tx_drop": 0,
+    "vnet1_tx_errors": 0,
+    "vnet1_tx_packets": 662
+}

tests/OpenCloud/Tests/Compute/_response/Extensions.resp

@@ -119,6 +119,14 @@ Server: Jetty(8.0.y.z-SNAPSHOT)
             "alias": "os-keypairs",
             "description": "Keypair Support."
         },
+        {
+            "updated": "2011-12-21T00:00:00+00:00",
+            "name": "ServerDiagnostics",
+            "links": [],
+            "namespace": "http://docs.openstack.org/compute/ext/server-diagnostics/api/v1.1",
+            "alias": "os-server-diagnostics",
+            "description": "Allow Admins to view server diagnostics through server action."
+        },
         {
             "updated": "2012-03-07T14:46:43Z",
             "name": "OSNetworksV2",