Allow Lease metrics to be exported across all namespaces

Author: lantingchiang

docs/lease-metrics.md

@@ -1,6 +1,6 @@
 # Lease Metrics
 
-| Metric name| Metric type | Labels/tags | Status |
-| ---------- | ----------- | ----------- | ----------- |
-| kube_lease_owner | Gauge | `lease`=&lt;lease-name&gt; <br> `owner_kind`=&lt;onwer kind&gt; <br> `owner_name`=&lt;owner name&gt; | EXPERIMENTAL |
-| kube_lease_renew_time | Gauge | `lease`=&lt;lease-name&gt; | EXPERIMENTAL |
+| Metric name| Metric type | Labels/tags                                                                                                                               | Status |
+| ---------- | ----------- |-------------------------------------------------------------------------------------------------------------------------------------------| ----------- |
+| kube_lease_owner | Gauge | `lease`=&lt;lease-name&gt; <br> `owner_kind`=&lt;onwer kind&gt; <br> `owner_name`=&lt;owner name&gt; <br> `namespace` = &lt;namespace&gt; | EXPERIMENTAL |
+| kube_lease_renew_time | Gauge | `lease`=&lt;lease-name&gt; <br> `namespace` = &lt;namespace&gt;                                                                                                               | EXPERIMENTAL |

internal/store/lease.go

@@ -107,10 +107,10 @@ func wrapLeaseFunc(f func(*coordinationv1.Lease) *metric.Family) func(interface{
 func createLeaseListWatch(kubeClient clientset.Interface, _ string, _ string) cache.ListerWatcher {
 	return &cache.ListWatch{
 		ListFunc: func(opts metav1.ListOptions) (runtime.Object, error) {
-			return kubeClient.CoordinationV1().Leases("kube-node-lease").List(context.TODO(), opts)
+			return kubeClient.CoordinationV1().Leases("").List(context.TODO(), opts)
 		},
 		WatchFunc: func(opts metav1.ListOptions) (watch.Interface, error) {
-			return kubeClient.CoordinationV1().Leases("kube-node-lease").Watch(context.TODO(), opts)
+			return kubeClient.CoordinationV1().Leases("").Watch(context.TODO(), opts)
 		},
 	}
 }