Parameterize several dependency endpoints so that they can be overridden with internal mirrors.

Signed-off-by: Chad Swenson <chadswen@gmail.com>

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

@@ -0,0 +1,12 @@
+# Versions
+kubedns_version: 1.7
+kubednsmasq_version: 1.3
+exechealthz_version: 1.1
+
+# Images
+kubedns_image_repo: "gcr.io/google_containers/kubedns-amd64"
+kubedns_image_tag: "{{ kubedns_version }}"
+kubednsmasq_image_repo: "gcr.io/google_containers/kube-dnsmasq-amd64"
+kubednsmasq_image_tag: "{{ kubednsmasq_version }}"
+exechealthz_image_repo: "gcr.io/google_containers/exechealthz-amd64"
+exechealthz_image_tag: "{{ exechealthz_version }}"

roles/kubernetes-apps/ansible/templates/kubedns-rc.yml

@@ -21,7 +21,7 @@ spec:
     spec:
       containers:
       - name: kubedns
-        image: gcr.io/google_containers/kubedns-amd64:1.7
+        image: "{{ kubedns_image_repo }}:{{ kubedns_image_tag }}"
         resources:
           # TODO: Set memory limits when we've profiled the container for large
           # clusters, then set request = limit to keep this container in
@@ -63,7 +63,7 @@ spec:
           name: dns-tcp-local
           protocol: TCP
       - name: dnsmasq
-        image: gcr.io/google_containers/kube-dnsmasq-amd64:1.3
+        image: "{{ kubednsmasq_image_repo }}:{{ kubednsmasq_image_tag }}"
         args:
         - --log-facility=-
         - --cache-size=1000
@@ -77,7 +77,7 @@ spec:
           name: dns-tcp
           protocol: TCP
       - name: healthz
-        image: gcr.io/google_containers/exechealthz-amd64:1.1
+        image: "{{ exechealthz_image_repo }}:{{ exechealthz_image_tag }}"
         resources:
           # keep request = limit to keep this container in guaranteed class
           limits: