Add k8s metallb switch parameter in k8s models

Use part of private adresses pool for metallb addresses.
By default metallb is disabled.

Change-Id: I60f62abbbf5681a91304c88560912f43802a89f2
Related-PROD: PROD-21474
diff --git a/classes/cluster/k8s-compact/kubernetes/control.yml b/classes/cluster/k8s-compact/kubernetes/control.yml
index 53dcbf8..d937d71 100644
--- a/classes/cluster/k8s-compact/kubernetes/control.yml
+++ b/classes/cluster/k8s-compact/kubernetes/control.yml
@@ -47,6 +47,10 @@
           enabled: ${_param:kubernetes_externaldns_enabled}
           image: ${_param:kubernetes_externaldns_image}
           provider: ${_param:kubernetes_externaldns_provider}
+        metallb:
+          enabled: ${_param:kubernetes_metallb_enabled}
+          addresses:
+          - ${_param:kubernetes_metallb_addresses_pool}
     master:
       service_addresses: 10.201.0.0/16
       addons:
diff --git a/classes/cluster/k8s-compact/kubernetes/init.yml b/classes/cluster/k8s-compact/kubernetes/init.yml
index 7a71f6a..fd00525 100644
--- a/classes/cluster/k8s-compact/kubernetes/init.yml
+++ b/classes/cluster/k8s-compact/kubernetes/init.yml
@@ -49,3 +49,5 @@
     kubernetes_virtlet_enabled: true
     kubernetes_coredns_enabled: false
     kubernetes_externaldns_enabled: false
+    kubernetes_metallb_addresses_pool: 172.16.10.60-172.16.10.80
+    kubernetes_metallb_enabled: false
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