Convert dashboard to kubectl_apply_stdin

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

----
-- name: Kubernetes Apps | Lay down dashboard template
-  template:
-    src: "{{ item.file }}.j2"
-    dest: "{{ kube_config_dir }}/{{ item.file }}"
-    mode: "0644"
-  with_items:
-    - { file: dashboard.yml, type: deploy, name: kubernetes-dashboard }
-  register: manifests
-  when: inventory_hostname == groups['kube_control_plane'][0]
-
-- name: Kubernetes Apps | Start dashboard
-  kube:
-    name: "{{ item.item.name }}"
-    namespace: "{{ dashboard_namespace }}"
-    kubectl: "{{ bin_dir }}/kubectl"
-    resource: "{{ item.item.type }}"
-    filename: "{{ kube_config_dir }}/{{ item.item.file }}"
-    state: "latest"
-  with_items: "{{ manifests.results }}"
-  when: inventory_hostname == groups['kube_control_plane'][0]

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

@@ -67,7 +67,13 @@
     - netchecker
 
 - name: Kubernetes Apps | Dashboard
-  import_tasks: dashboard.yml
+  command:
+    cmd: "{{ kubectl_apply_stdin }}"
+    stdin: "{{ lookup('template', 'dashboard.yml.j2') }}"
+  delegate_to: "{{ groups['kube_control_plane'][0] }}"
+  run_once: true
+  vars:
+    namespace: "{{ dashboard_namespace }}"
   when: dashboard_enabled
   tags:
     - dashboard

roles/kubernetes-apps/ansible/templates/dashboard.yml.j2

@@ -17,16 +17,15 @@
 #
 # Example usage: kubectl create -f <this_file>
 
-{% if dashboard_namespace != "kube-system" %}
+{% if namespace != 'kube-system' %}
 ---
 apiVersion: v1
 kind: Namespace
 metadata:
-  name: {{ dashboard_namespace }}
+  name: {{ namespace }}
   labels:
-    name: {{ dashboard_namespace }}
+    name: {{ namespace }}
 {% endif %}
-
 ---
 # ------------------- Dashboard Secrets ------------------- #
 apiVersion: v1
@@ -35,7 +34,6 @@ metadata:
   labels:
     k8s-app: kubernetes-dashboard
   name: kubernetes-dashboard-certs
-  namespace: {{ dashboard_namespace }}
 type: Opaque
 
 ---
@@ -45,7 +43,6 @@ metadata:
   labels:
     k8s-app: kubernetes-dashboard
   name: kubernetes-dashboard-csrf
-  namespace: {{ dashboard_namespace }}
 type: Opaque
 data:
   csrf: ""
@@ -57,7 +54,6 @@ metadata:
   labels:
     k8s-app: kubernetes-dashboard
   name: kubernetes-dashboard-key-holder
-  namespace: {{ dashboard_namespace }}
 type: Opaque
 
 ---
@@ -68,7 +64,6 @@ metadata:
   labels:
     k8s-app: kubernetes-dashboard
   name: kubernetes-dashboard-settings
-  namespace: {{ dashboard_namespace }}
 
 ---
 # ------------------- Dashboard Service Account ------------------- #
@@ -79,7 +74,6 @@ metadata:
   labels:
     k8s-app: kubernetes-dashboard
   name: kubernetes-dashboard
-  namespace: {{ dashboard_namespace }}
 
 ---
 # ------------------- Dashboard Role & Role Binding ------------------- #
@@ -89,7 +83,6 @@ metadata:
   labels:
     k8s-app: kubernetes-dashboard
   name: kubernetes-dashboard
-  namespace: {{ dashboard_namespace }}
 rules:
   # Allow Dashboard to get, update and delete Dashboard exclusive secrets.
   - apiGroups: [""]
@@ -118,7 +111,6 @@ metadata:
   labels:
     k8s-app: kubernetes-dashboard
   name: kubernetes-dashboard
-  namespace: {{ dashboard_namespace }}
 roleRef:
   apiGroup: rbac.authorization.k8s.io
   kind: Role
@@ -126,7 +118,7 @@ roleRef:
 subjects:
   - kind: ServiceAccount
     name: kubernetes-dashboard
-    namespace: {{ dashboard_namespace }}
+    namespace: {{ namespace }}
 
 ---
 apiVersion: rbac.authorization.k8s.io/v1
@@ -140,7 +132,7 @@ roleRef:
 subjects:
   - kind: ServiceAccount
     name: kubernetes-dashboard
-    namespace: {{ dashboard_namespace }}
+    namespace: {{ namespace }}
 
 ---
 # ------------------- Dashboard Deployment ------------------- #
@@ -151,7 +143,6 @@ metadata:
   labels:
     k8s-app: kubernetes-dashboard
   name: kubernetes-dashboard
-  namespace: {{ dashboard_namespace }}
 spec:
   replicas: {{ dashboard_replicas }}
   revisionHistoryLimit: 10
@@ -182,7 +173,7 @@ spec:
             - containerPort: 8443
               protocol: TCP
           args:
-            - --namespace={{ dashboard_namespace }}
+            - --namespace={{ namespace }}
 {% if dashboard_use_custom_certs %}
             - --tls-key-file={{ dashboard_tls_key_file }}
             - --tls-cert-file={{ dashboard_tls_cert_file }}
@@ -238,7 +229,6 @@ metadata:
   labels:
     k8s-app: kubernetes-dashboard
   name: kubernetes-dashboard
-  namespace: {{ dashboard_namespace }}
 spec:
   ports:
     - port: 443
@@ -270,7 +260,6 @@ metadata:
   labels:
     k8s-app: kubernetes-metrics-scraper
   name: dashboard-metrics-scraper
-  namespace: {{ dashboard_namespace }}
 spec:
   ports:
     - port: 8000
@@ -287,7 +276,6 @@ metadata:
   labels:
     k8s-app: kubernetes-metrics-scraper
   name: kubernetes-metrics-scraper
-  namespace: {{ dashboard_namespace }}
 spec:
   replicas: 1
   revisionHistoryLimit: 10