Kubernetes leaderelection improvements (#21896) (#21953)

(cherry picked from commit 9dc2f8c)
elastic · Oct 19, 2020 · 760faa1 · 760faa1
1 parent 6be236c
commit 760faa1
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Showing 2 changed files with 9 additions and 5 deletions.
diff --git a/libbeat/autodiscover/providers/kubernetes/kubernetes.go b/libbeat/autodiscover/providers/kubernetes/kubernetes.go
@@ -249,9 +249,13 @@ func NewLeaderElectionManager(
 	} else {
 		id = "beats-leader-" + uuid.String()
 	}
+	ns, err := kubernetes.InClusterNamespace()
+	if err != nil {
+		ns = "default"
+	}
 	lease := metav1.ObjectMeta{
 		Name:      cfg.LeaderLease,
-		Namespace: "default",
+		Namespace: ns,
 	}
 	metaUID := lease.GetObjectMeta().GetUID()
 	lem.leaderElection = leaderelection.LeaderElectionConfig{
@@ -262,7 +266,7 @@ func NewLeaderElectionManager(
 				Identity: id,
 			},
 		},
-		ReleaseOnCancel: true,
+		ReleaseOnCancel: false,
 		LeaseDuration:   15 * time.Second,
 		RenewDeadline:   10 * time.Second,
 		RetryPeriod:     2 * time.Second,

diff --git a/libbeat/common/kubernetes/util.go b/libbeat/common/kubernetes/util.go
@@ -101,7 +101,7 @@ func DiscoverKubernetesNode(log *logp.Logger, host string, inCluster bool, clien
 	}
 	ctx := context.TODO()
 	if inCluster {
-		ns, err := inClusterNamespace()
+		ns, err := InClusterNamespace()
 		if err != nil {
 			log.Errorf("kubernetes: Couldn't get namespace when beat is in cluster with error: %+v", err.Error())
 			return defaultNode
@@ -158,9 +158,9 @@ func machineID() string {
 	return ""
 }
 
-// inClusterNamespace gets namespace from serviceaccount when beat is in cluster.
+// InClusterNamespace gets namespace from serviceaccount when beat is in cluster.
 // code borrowed from client-go with some changes.
-func inClusterNamespace() (string, error) {
+func InClusterNamespace() (string, error) {
 	// get namespace associated with the service account token, if available
 	data, err := ioutil.ReadFile("/var/run/secrets/kubernetes.io/serviceaccount/namespace")
 	if err != nil {