Add k8s target config

Change-Id: Ic10eade23c9bff56de2a448ee63159152762ff67
diff --git a/kubernetes/meta/prometheus.yml b/kubernetes/meta/prometheus.yml
index a8f71cc..df0ee76 100644
--- a/kubernetes/meta/prometheus.yml
+++ b/kubernetes/meta/prometheus.yml
@@ -11,6 +11,11 @@
 server:
 {%- if network.get('engine', '') == 'calico' and network.get('prometheus', {}).get('enabled', False) %}
   target:
+    kubernetes:
+      enabled: true
+      api_ip: ${_param:kubernetes_control_address}
+      cert_name: prometheus-server.crt
+      key_name: prometheus-server.key
     static:
       calico:
         endpoint: