fix(etcd): update etcd-metrics to endpointslice using single subset (#12846)

Signed-off-by: Meza <meza-xyz@proton.me>

roles/kubernetes-apps/ansible/tasks/main.yml

@@ -82,7 +82,7 @@
   delegate_to: "{{ groups['kube_control_plane'][0] }}"
   run_once: true
   loop:
-    - etcd_metrics-endpoints.yml.j2
+    - etcd_metrics-endpointslices.yml.j2
     - etcd_metrics-service.yml.j2
   when: etcd_metrics_port is defined and etcd_metrics_service_labels is defined
   tags:

roles/kubernetes-apps/ansible/templates/etcd_metrics-endpoints.yml.j2

@@ -1,20 +0,0 @@
-apiVersion: v1
-kind: Endpoints
-metadata:
-  name: etcd-metrics
-  namespace: kube-system
-  labels:
-    k8s-app: etcd
-    app.kubernetes.io/managed-by: Kubespray
-subsets:
-{% for etcd_metrics_address, etcd_host in etcd_metrics_addresses.split(',') | zip(etcd_hosts) %}
-  - addresses:
-      - ip: {{ etcd_metrics_address | urlsplit('hostname') }}
-        targetRef:
-          kind: Node
-          name: {{ etcd_host }}
-    ports:
-      - name: http-metrics
-        port: {{ etcd_metrics_address | urlsplit('port') }}
-        protocol: TCP
-{% endfor %}

roles/kubernetes-apps/ansible/templates/etcd_metrics-endpointslices.yml.j2

@@ -0,0 +1,25 @@
+apiVersion: discovery.k8s.io/v1
+kind: EndpointSlice
+metadata:
+  name: etcd-metrics
+  namespace: kube-system
+  labels:
+    k8s-app: etcd
+    app.kubernetes.io/managed-by: Kubespray
+    kubernetes.io/service-name: etcd-metrics
+addressType: IPv4
+endpoints:
+{% for etcd_metrics_address, etcd_host in etcd_metrics_addresses.split(',') | zip(etcd_hosts) %}
+  - addresses:
+      - "{{ etcd_metrics_address | urlsplit('hostname') }}"
+    conditions:
+      ready: true
+    nodeName: {{ etcd_host }}
+    targetRef:
+      kind: Node
+      name: {{ etcd_host }}
+{% endfor %}
+ports:
+  - name: http-metrics
+    port: {{ etcd_metrics_port }}
+    protocol: TCP