Merge "[k8s] Support configurable health polling interval"

magnum/conf/kubernetes.py

@@ -28,6 +28,11 @@ kubernetes_opts = [
                     'the Kubernetes cluster created. For exmaple, this '
                     'could be a file including the vendor specific '
                     'storage class.'),
+    cfg.IntOpt('health_polling_interval',
+               default=60,
+               help=('The default polling interval for Kubernetes cluster '
+                     'health. If this number is negative the periodic task '
+                     'will be disabled.')),
 ]
 
 

magnum/service/periodic.py

@@ -152,7 +152,9 @@ class MagnumPeriodicTasks(periodic_task.PeriodicTasks):
         super(MagnumPeriodicTasks, self).__init__(conf)
         self.notifier = rpc.get_notifier()
 
-    @periodic_task.periodic_task(spacing=10, run_immediately=True)
+    @periodic_task.periodic_task(
+        spacing=CONF.kubernetes.health_polling_interval,
+        run_immediately=True)
     @set_context
     def sync_cluster_status(self, ctx):
         try:

releasenotes/notes/configurable-k8s-health-polling-interval-75bb83b4701d48c5.yaml

@@ -0,0 +1,13 @@
+---
+features:
+  - |
+    The default 10 seconds health polling interval is too frequent for most of
+    the cases. Now it has been changed to 60s. A new config
+    `health_polling_interval` is supported to make the interval configurable.
+    Cloud admin can totally disable the health polling by set a negative value
+    for the config.
+upgrade:
+  - |
+    If it's still preferred to have 10s health polling interval for Kubernetes
+    cluster. It can be set by config `health_polling_interval` under
+    `kubernetes` section.