Cleanup defaults file from kubernetes-apps and add dashboard to download role (#3800)

* Remove variables defined in download role. Fixes #3799

* Cleanup some more variables

* Fix bad templating

* Minor fix

* Add dashboard to download role. Fixes #3736

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

@@ -1,8 +1,4 @@
 ---
-# Versions
-kubedns_version: 1.14.13
-kubednsautoscaler_version: 1.2.0
-
 # Limits for dnsmasq/kubedns apps
 dns_memory_limit: 170Mi
 dns_cpu_requests: 100m
@@ -10,27 +6,13 @@ dns_memory_requests: 70Mi
 dns_min_replicas: 2
 dns_nodes_per_replica: 10
 dns_cores_per_replica: 20
-dns_prevent_single_point_failure: "{{ 'true' if dns_min_replicas > 1 else 'false' }}"
-
-# Images
-image_arch: "{{host_architecture}}"
-
-kubedns_image_repo: "gcr.io/google_containers/k8s-dns-kube-dns-{{ image_arch }}"
-kubedns_image_tag: "{{ kubedns_version }}"
-dnsmasq_nanny_image_repo: "gcr.io/google_containers/k8s-dns-dnsmasq-nanny-{{ image_arch }}"
-dnsmasq_nanny_image_tag: "{{ kubedns_version }}"
-dnsmasq_sidecar_image_repo: "gcr.io/google_containers/k8s-dns-sidecar-{{ image_arch }}"
-dnsmasq_sidecar_image_tag: "{{ kubedns_version }}"
-dnsautoscaler_image_repo: "gcr.io/google_containers/cluster-proportional-autoscaler-{{ image_arch }}"
-dnsautoscaler_image_tag: "{{ kubednsautoscaler_version }}"
+dns_prevent_single_point_failure: "{{ 'true' if dns_min_replicas|int > 1 else 'false' }}"
 
 # Netchecker
 deploy_netchecker: false
 netchecker_port: 31081
 agent_report_interval: 15
 netcheck_namespace: default
-agent_img: "{{ netcheck_agent_image_repo }}:{{ netcheck_agent_image_tag }}"
-server_img: "{{ netcheck_server_image_repo }}:{{ netcheck_server_image_tag }}"
 
 # Limits for netchecker apps
 netchecker_agent_cpu_limit: 30m
@@ -50,8 +32,6 @@ netchecker_server_group: 1000
 
 # Dashboard
 dashboard_enabled: true
-dashboard_image_repo: gcr.io/google_containers/kubernetes-dashboard-{{ image_arch }}
-dashboard_image_tag: v1.10.0
 
 # Limits for dashboard
 dashboard_cpu_limit: 100m

roles/kubernetes-apps/ansible/templates/netchecker-agent-ds.yml.j2

@@ -22,7 +22,7 @@ spec:
         beta.kubernetes.io/os: linux
       containers:
         - name: netchecker-agent
-          image: "{{ agent_img }}"
+          image: "{{ netcheck_agent_image_repo }}:{{ netcheck_agent_image_tag }}"
           env:
             - name: MY_POD_NAME
               valueFrom:

roles/kubernetes-apps/ansible/templates/netchecker-agent-hostnet-ds.yml.j2

@@ -26,7 +26,7 @@ spec:
           operator: Exists
       containers:
         - name: netchecker-agent
-          image: "{{ agent_img }}"
+          image: "{{ netcheck_agent_image_repo }}:{{ netcheck_agent_image_tag }}"
           env:
             - name: MY_POD_NAME
               valueFrom:

roles/kubernetes-apps/ansible/templates/netchecker-server-deployment.yml.j2

@@ -16,7 +16,7 @@ spec:
 {% endif %}
       containers:
         - name: netchecker-server
-          image: "{{ server_img }}"
+          image: "{{ netcheck_server_image_repo }}:{{ netcheck_server_image_tag }}"
           env:
           imagePullPolicy: {{ k8s_image_pull_policy }}
           resources: