Download images as dependencies of roles

Pre download all required container images as roles' deps.
Drop unused flannel-server-helper images pre download.
Improve pods creation post-install test pre downloaded busybox.
Improve logs collection script with kubectl describe, fix sudo/etcd/weave
commands.

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>

roles/download/defaults/main.yml

@@ -24,7 +24,6 @@ calico_version: v1.0.0-beta
 calico_cni_version: v1.4.2
 weave_version: v1.6.1
 flannel_version: v0.6.2
-flannel_server_helper_version: 0.1
 pod_infra_version: 3.0
 
 # Download URL's
@@ -40,8 +39,6 @@ etcd_checksum: "385afd518f93e3005510b7aaa04d38ee4a39f06f5152cd33bb86d4f0c94c7485
 etcd_deployment_type: "docker"
 etcd_image_repo: "quay.io/coreos/etcd"
 etcd_image_tag: "{{ etcd_version }}"
-flannel_server_helper_image_repo: "gcr.io/google_containers/flannel-server-helper"
-flannel_server_helper_image_tag: "{{ flannel_server_helper_version }}"
 flannel_image_repo: "quay.io/coreos/flannel"
 flannel_image_tag: "{{ flannel_version }}"
 calicoctl_image_repo: "calico/ctl"
@@ -52,10 +49,28 @@ calico_node_image_repo: "calico/node"
 calico_node_image_tag: "{{ calico_version }}"
 calico_cni_image_repo: "calico/cni"
 calico_cni_image_tag: "{{ calico_cni_version }}"
+calico_policy_image_repo: "calico/kube-policy-controller"
+calico_policy_image_tag: latest
+exechealthz_version: 1.1
+exechealthz_image_repo: "gcr.io/google_containers/exechealthz-amd64"
+exechealthz_image_tag: "{{ exechealthz_version }}"
 hyperkube_image_repo: "quay.io/coreos/hyperkube"
 hyperkube_image_tag: "{{ kube_version }}_coreos.0"
 pod_infra_image_repo: "gcr.io/google_containers/pause-amd64"
 pod_infra_image_tag: "{{ pod_infra_version }}"
+nginx_image_repo: nginx
+nginx_image_tag: 1.11.4-alpine
+dnsmasq_version: 2.72
+dnsmasq_image_repo: "andyshinn/dnsmasq"
+dnsmasq_image_tag: "{{ dnsmasq_version }}"
+kubednsmasq_version: 1.3
+kubednsmasq_image_repo: "gcr.io/google_containers/kube-dnsmasq-amd64"
+kubednsmasq_image_tag: "{{ kubednsmasq_version }}"
+kubedns_version: 1.7
+kubedns_image_repo: "gcr.io/google_containers/kubedns-amd64"
+kubedns_image_tag: "{{ kubedns_version }}"
+test_image_repo: busybox
+test_image_tag: latest
 
 downloads:
   weave:
@@ -88,11 +103,6 @@ downloads:
     repo: "{{ flannel_image_repo }}"
     tag: "{{ flannel_image_tag }}"
     enabled: "{{ kube_network_plugin == 'flannel' or kube_network_plugin == 'canal' }}"
-  flannel_server_helper:
-    container: true
-    repo: "{{ flannel_server_helper_image_repo }}"
-    tag: "{{ flannel_server_helper_image_tag }}"
-    enabled: "{{ kube_network_plugin == 'flannel' or kube_network_plugin == 'canal' }}"
   calicoctl:
     container: true
     repo: "{{ calicoctl_image_repo }}"
@@ -108,10 +118,39 @@ downloads:
     repo: "{{ calico_cni_image_repo }}"
     tag: "{{ calico_cni_image_tag }}"
     enabled: "{{ kube_network_plugin == 'calico' or kube_network_plugin == 'canal' }}"
+  calico_policy:
+    container: true
+    repo: "{{ calico_policy_image_repo }}"
+    tag: "{{ calico_policy_image_tag }}"
+    enabled: "{{ kube_network_plugin == 'canal' }}"
   pod_infra:
     container: true
     repo: "{{ pod_infra_image_repo }}"
     tag: "{{ pod_infra_image_tag }}"
+  nginx:
+    container: true
+    repo: "{{ nginx_image_repo }}"
+    tag: "{{ nginx_image_tag }}"
+  dnsmasq:
+    container: true
+    repo: "{{ dnsmasq_image_repo }}"
+    tag: "{{ dnsmasq_image_tag }}"
+  kubednsmasq:
+    container: true
+    repo: "{{ kubednsmasq_image_repo }}"
+    tag: "{{ kubednsmasq_image_tag }}"
+  kubedns:
+    container: true
+    repo: "{{ kubedns_image_repo }}"
+    tag: "{{ kubedns_image_tag }}"
+  testbox:
+    container: true
+    repo: "{{ test_image_repo }}"
+    tag: "{{ test_image_tag }}"
+  exechealthz:
+    container: true
+    repo: "{{ exechealthz_image_repo }}"
+    tag: "{{ exechealthz_image_tag }}"
 
 download:
   container: "{{ file.container|default('false') }}"