Add addons args in ensure-kubernetes role

Minikube provides addons and we can enable specific addons by passing the --addons arg when using minikube cli

Change-Id: I8d10e3a3dde1070b5c79406285035dacb59dddc8

roles/ensure-kubernetes/README.rst

@@ -23,3 +23,8 @@ An ansible role to install kubernetes.
 
    Which kubernetes runtime to use; values are ``docker`` or
    ``cri-o``.
+
+.. zuul:rolevar:: ensure_kubernetes_minikube_addons
+   :default: []
+
+   List of addons to configure in k8s. Use this to enable the addons.

roles/ensure-kubernetes/defaults/main.yaml

@@ -1,4 +1,5 @@
 install_kubernetes_with_cluster: True
 minikube_version: latest
 minikube_dns_resolvers: []
+ensure_kubernetes_minikube_addons: []
 kubernetes_runtime: docker

roles/ensure-kubernetes/tasks/minikube.yaml

@@ -38,7 +38,7 @@
 
 - name: Default args
   set_fact:
-    minikube_args: ""
+    extra_args: ""
 
 - name: Configure dns options if set
   block:
@@ -49,12 +49,20 @@
         mode: "0444"
     - name: Set extra kube setttings
       set_fact:
-        minikube_args: "--extra-config=kubelet.resolv-conf={{ ansible_user_dir }}/.minikube/k8s_resolv.conf"
+        extra_args: "--extra-config=kubelet.resolv-conf={{ ansible_user_dir }}/.minikube/k8s_resolv.conf"
   when: minikube_dns_resolvers|length>0
 
 - name: Start Minikube
   become: yes
-  command: "/tmp/minikube start --v=7 --vm-driver=none --container-runtime={{ kubernetes_runtime }} {{ minikube_args }}"
+  command: >-
+    /tmp/minikube start
+    --v=7
+    --vm-driver=none
+    --container-runtime={{ kubernetes_runtime }}
+    {{ extra_args }}
+    {% for _addon in ensure_kubernetes_minikube_addons %}
+    --addons={{ _addon }}
+    {% endfor %}
   environment:
     MINIKUBE_WANTUPDATENOTIFICATION: false
     MINIKUBE_WANTREPORTERRORPROMPT: false