add autoconf_event_delay to reduce event requests

kubernetes/check.py

@@ -32,6 +32,8 @@
 DEFAULT_COLLECT_EVENTS = False
 DEFAULT_NAMESPACES = ['default']
 
+DEFAULT_AUTOCONF_EVENT_DELAY = 5
+
 NET_ERRORS = ['rx_errors', 'tx_errors', 'rx_dropped', 'tx_dropped']
 
 DEFAULT_ENABLED_GAUGES = [
@@ -108,12 +110,13 @@ def __init__(self, name, init_config, agentConfig, instances=None):
                 self.event_retriever = self.kubeutil.get_event_retriever()
             else:
                 # Only fetch service and pod events for service mapping and SD
-                self.event_retriever = self.kubeutil.get_event_retriever(kinds=['Service', 'Pod'])
+                event_delay = inst.get('autoconf_event_delay', DEFAULT_AUTOCONF_EVENT_DELAY) * 60
+                self.event_retriever = self.kubeutil.get_event_retriever(kinds=['Service', 'Pod'],
+                                                                         delay=event_delay)
         else:
             self._collect_events = None
             self.event_retriever = None
 
-
     def _perform_kubelet_checks(self, url):
         service_check_base = NAMESPACE + '.kubelet.check'
         is_ok = True

kubernetes/conf.yaml.example

@@ -51,6 +51,11 @@ instances:
   #
   # collect_events: false
   #
+  # Matching the pods to Kubernetes services requires to retrieve events regularly.
+  # To reduce the traffic to the apiserver, only query them every 5 minutes, adding a delay
+  # in pod -> service matching. You can configure it below (in minutes)
+  #
+  # autoconf_event_delay: 5
   #
   # The namespaces for which events should be collected.
   # If not modified, the 'default' namespace will be used.