[kubernetes] add metrics for k8s deployments

checks.d/kubernetes.py

@@ -317,13 +317,41 @@ def _update_metrics(self, instance, pods_list):
 
         self._update_pods_metrics(instance, pods_list)
 
+        deployment_list = self.kubeutil.retrieve_deployments_list()
+        self._update_deployment_metrics(instance, deployment_list)
+
+    def _update_deployment_metrics(self, instance, deployments):
+        deployments_map = dict()
+        for deployment in deployments['items']:
+            try:
+                pod_count = deployment['status']['replicas']
+                pod_desired_count = deployment['spec']['replicas']
+                pod_available_count = deployment['status']['availableReplicas']
+                deployments_map[deployment['metadata']['name']] = {
+                    'pods': pod_count,
+                    'desired': pod_desired_count,
+                    'available': pod_available_count,
+                    'unavailable': pod_count - pod_available_count
+                }
+            except KeyError:
+                continue
+
+        tags = instance.get('tags', [])
+        for dep, stats in deployments_map.iteritems():
+            _tags = tags[:]
+            _tags.append('kube_deployment:{0}'.format(dep))
+            self.publish_gauge(self, NAMESPACE + '.pods.running', stats['pods'], _tags)
+            self.publish_gauge(self, NAMESPACE + '.pods.desired', stats['desired'], _tags)
+            self.publish_gauge(self, NAMESPACE + '.pods.available', stats['available'], _tags)
+            self.publish_gauge(self, NAMESPACE + '.pods.unavailable', stats['unavailable'], _tags)
+
     def _update_pods_metrics(self, instance, pods):
         supported_kinds = [
             "DaemonSet",
-            "Deployment",
             "Job",
             "ReplicationController",
-            "ReplicaSet",
+            "Deployment",
+            "ReplicaSet"
         ]
 
         controllers_map = defaultdict(int)

tests/checks/fixtures/kubernetes/deployments_list.json

@@ -0,0 +1,136 @@
+{
+  "kind": "DeploymentList",
+  "apiVersion": "extensions/v1beta1",
+  "metadata": {
+    "selfLink": "/apis/extensions/v1beta1/deployments",
+    "resourceVersion": "1323769"
+  },
+  "items": [
+    {
+      "metadata": {
+        "name": "heapster-v1.1.0",
+        "namespace": "kube-system",
+        "selfLink": "/apis/extensions/v1beta1/namespaces/kube-system/deployments/heapster-v1.1.0",
+        "uid": "4707e5fd-4e98-11e6-8ed7-42010af0019d",
+        "resourceVersion": "1146651",
+        "generation": 4,
+        "creationTimestamp": "2016-07-20T16:37:41Z",
+        "labels": {
+          "k8s-app": "heapster",
+          "kubernetes.io/cluster-service": "true",
+          "version": "v1.1.0"
+        },
+        "annotations": {
+          "deployment.kubernetes.io/revision": "2"
+        }
+      },
+      "spec": {
+        "replicas": 1,
+        "selector": {
+          "matchLabels": {
+            "k8s-app": "heapster",
+            "version": "v1.1.0"
+          }
+        },
+        "template": {
+          "metadata": {
+            "creationTimestamp": null,
+            "labels": {
+              "k8s-app": "heapster",
+              "version": "v1.1.0"
+            }
+          },
+          "spec": {
+            "containers": [
+              {
+                "name": "heapster",
+                "image": "eu.gcr.io/google_containers/heapster:v1.1.0",
+                "command": [
+                  "/heapster",
+                  "--source=kubernetes.summary_api:''"
+                ],
+                "resources": {
+                  "limits": {
+                    "cpu": "88m",
+                    "memory": "204Mi"
+                  },
+                  "requests": {
+                    "cpu": "88m",
+                    "memory": "204Mi"
+                  }
+                },
+                "terminationMessagePath": "/dev/termination-log",
+                "imagePullPolicy": "IfNotPresent"
+              },
+              {
+                "name": "heapster-nanny",
+                "image": "eu.gcr.io/google_containers/addon-resizer:1.3",
+                "command": [
+                  "/pod_nanny",
+                  "--cpu=80m",
+                  "--extra-cpu=0.5m",
+                  "--memory=140Mi",
+                  "--extra-memory=4Mi",
+                  "--threshold=5",
+                  "--deployment=heapster-v1.1.0",
+                  "--container=heapster",
+                  "--poll-period=300000",
+                  "--estimator=exponential"
+                ],
+                "env": [
+                  {
+                    "name": "MY_POD_NAME",
+                    "valueFrom": {
+                      "fieldRef": {
+                        "apiVersion": "v1",
+                        "fieldPath": "metadata.name"
+                      }
+                    }
+                  },
+                  {
+                    "name": "MY_POD_NAMESPACE",
+                    "valueFrom": {
+                      "fieldRef": {
+                        "apiVersion": "v1",
+                        "fieldPath": "metadata.namespace"
+                      }
+                    }
+                  }
+                ],
+                "resources": {
+                  "limits": {
+                    "cpu": "50m",
+                    "memory": "92960Ki"
+                  },
+                  "requests": {
+                    "cpu": "50m",
+                    "memory": "92960Ki"
+                  }
+                },
+                "terminationMessagePath": "/dev/termination-log",
+                "imagePullPolicy": "IfNotPresent"
+              }
+            ],
+            "restartPolicy": "Always",
+            "terminationGracePeriodSeconds": 30,
+            "dnsPolicy": "ClusterFirst",
+            "securityContext": {}
+          }
+        },
+        "strategy": {
+          "type": "RollingUpdate",
+          "rollingUpdate": {
+            "maxUnavailable": 1,
+            "maxSurge": 1
+          }
+        }
+      },
+      "status": {
+        "observedGeneration": 4,
+        "replicas": 1,
+        "updatedReplicas": 1,
+        "availableReplicas": 1
+      }
+    }
+  ]
+}