Add kube dashboard, enabled by default (#1643)

* Add kube dashboard, enabled by default

Also add rbac role for kube user

* Update main.yml

inventory/group_vars/k8s-cluster.yml

@@ -45,6 +45,8 @@ kube_users:
   kube:
     pass: "{{kube_api_pwd}}"
     role: admin
+    groups:
+      - system:masters
 
 ## It is possible to activate / deactivate selected authentication methods (basic auth, static token auth)
 #kube_oidc_auth: false
@@ -141,6 +143,9 @@ vault_deployment_type: docker
 # K8s image pull policy (imagePullPolicy)
 k8s_image_pull_policy: IfNotPresent
 
+# Kubernetes dashboard (available at http://first_master:6443/ui by default)
+dashboard_enabled: true
+
 # Monitoring apps for k8s
 efk_enabled: false