ingress-nginx: Upgrade to 0.16.2

ingress-nginx 0.16.2 (https://github.com/kubernetes/ingress-nginx/releases/tag/nginx-0.16.2)

This patch simplify ingress-nginx deployment by default deploy on
master, with customizable options; on the other hand, remove the
additional Ansible group "kube-ingress" and its k8s node label
injection.

Reference to https://kubernetes.io/docs/concepts/services-networking/ingress/#prerequisites:

    GCE/Google Kubernetes Engine deploys an ingress controller on the master.

By changing `ingress_nginx_nodeselector` plus custom k8s node
label, user could customize the DaemonSet deployment target.

If `ingress_nginx_nodeselector` is empty, will deploy DaemonSet on
every k8s node.

roles/kubernetes-apps/ingress_controller/ingress_nginx/tasks/main.yml

@@ -1,5 +1,23 @@
 ---
 
+- name: NGINX Ingress Controller | Remove legacy addon dir and manifests
+  file:
+    path: "{{ kube_config_dir }}/addons/ingress_nginx"
+    state: absent
+  when:
+    - inventory_hostname == groups['kube-master'][0]
+  tags:
+    - upgrade
+
+- name: NGINX Ingress Controller | Remove legacy namespace
+  shell: |
+    {{ bin_dir }}/kubectl delete namespace {{ ingress_nginx_namespace }}
+  ignore_errors: yes
+  when:
+    - inventory_hostname == groups['kube-master'][0]
+  tags:
+    - upgrade
+
 - name: NGINX Ingress Controller | Create addon dir
   file:
     path: "{{ kube_config_dir }}/addons/ingress_nginx"
@@ -7,24 +25,26 @@
     owner: root
     group: root
     mode: 0755
+  when:
+    - inventory_hostname == groups['kube-master'][0]
 
 - name: NGINX Ingress Controller | Create manifests
   template:
     src: "{{ item.file }}.j2"
     dest: "{{ kube_config_dir }}/addons/ingress_nginx/{{ item.file }}"
   with_items:
-    - { name: ingress-nginx-ns, file: ingress-nginx-ns.yml, type: ns }
-    - { name: ingress-nginx-sa, file: ingress-nginx-sa.yml, type: sa }
-    - { name: ingress-nginx-role, file: ingress-nginx-role.yml, type: role }
-    - { name: ingress-nginx-rolebinding, file: ingress-nginx-rolebinding.yml, type: rolebinding }
-    - { name: ingress-nginx-clusterrole, file: ingress-nginx-clusterrole.yml, type: clusterrole }
-    - { name: ingress-nginx-clusterrolebinding, file: ingress-nginx-clusterrolebinding.yml, type: clusterrolebinding }
-    - { name: ingress-nginx-cm, file: ingress-nginx-cm.yml, type: cm }
-    - { name: ingress-nginx-tcp-servicecs-cm, file: ingress-nginx-tcp-servicecs-cm.yml, type: cm }
-    - { name: ingress-nginx-udp-servicecs-cm, file: ingress-nginx-udp-servicecs-cm.yml, type: cm }
-    - { name: ingress-nginx-default-backend-svc, file: ingress-nginx-default-backend-svc.yml, type: svc }
-    - { name: ingress-nginx-default-backend-rs, file: ingress-nginx-default-backend-rs.yml, type: rs }
-    - { name: ingress-nginx-controller-ds, file: ingress-nginx-controller-ds.yml, type: ds }
+    - { name: 00-namespace, file: 00-namespace.yml, type: ns }
+    - { name: deploy-default-backend, file: deploy-default-backend.yml, type: deploy }
+    - { name: svc-default-backend, file: svc-default-backend.yml, type: svc }
+    - { name: cm-ingress-nginx, file: cm-ingress-nginx.yml, type: cm }
+    - { name: cm-tcp-services, file: cm-tcp-services.yml, type: cm }
+    - { name: cm-udp-services, file: cm-udp-services.yml, type: cm }
+    - { name: sa-ingress-nginx, file: sa-ingress-nginx.yml, type: sa }
+    - { name: clusterrole-ingress-nginx, file: clusterrole-ingress-nginx.yml, type: clusterrole }
+    - { name: clusterrolebinding-ingress-nginx, file: clusterrolebinding-ingress-nginx.yml, type: clusterrolebinding }
+    - { name: role-ingress-nginx, file: role-ingress-nginx.yml, type: role }
+    - { name: rolebinding-ingress-nginx, file: rolebinding-ingress-nginx.yml, type: rolebinding }
+    - { name: ds-ingress-nginx-controller, file: ds-ingress-nginx-controller.yml, type: ds }
   register: ingress_nginx_manifests
   when:
     - inventory_hostname == groups['kube-master'][0]