Install python-httplib2 required packaged

roles/etcd/tasks/install.yml

@@ -15,3 +15,9 @@
 
 - name: Create etcd2 binary symlink
   file: src=/usr/local/bin/etcd dest=/usr/local/bin/etcd2 state=link
+
+- name: install required python module 'httplib2'
+  apt:
+    name: "python-httplib2"
+    state: present
+  when: inventory_hostname == groups['kube-master'][0] or inventory_hostname == groups['etcd'][0]

roles/kubernetes/master/tasks/main.yml

@@ -32,6 +32,7 @@
     - "{{ kube_cert_dir }}"
     - "{{ kube_users_dir }}"
   delegate_to: "{{ groups['kube-master'][0] }}"
+  when: inventory_hostname != "{{ groups['kube-master'][0] }}"
 
 # Write manifests
 - name: Write kube-apiserver manifest
@@ -48,12 +49,6 @@
     port: "{{kube_apiserver_insecure_port}}"
     delay: 10
 
-- name: install required python module 'httplib2'
-  apt:
-    name: "python-httplib2"
-    state: present
-  when: inventory_hostname == groups['kube-master'][0]
-
 - name: Create 'kube-system' namespace
   uri:
     url: http://127.0.0.1:{{ kube_apiserver_insecure_port }}/api/v1/namespaces