Make growpart only run on Azure

roles/kubernetes/preinstall/tasks/growpart-centos-7.yml → roles/kubernetes/preinstall/tasks/growpart-azure-centos-7.yml

 ---
 
+# Running growpart seems to be only required on Azure, as other Cloud Providers do this at boot time
+
 - name: install growpart
   package: name=cloud-utils-growpart state=latest
 

roles/kubernetes/preinstall/tasks/main.yml

@@ -181,8 +181,14 @@
 - include: resolvconf.yml
   tags: [bootstrap-os, resolvconf]
   
-- include: growpart-centos-7.yml
-  when: ansible_distribution in ["CentOS","RedHat"] and
+- name: Check if we are running inside a Azure VM
+  stat: path=/var/lib/waagent/
+  register: azure_check
+  tags: bootstrap-os
+
+- include: growpart-azure-centos-7.yml
+  when: azure_check.stat.exists and
+        ansible_distribution in ["CentOS","RedHat"] and
         ansible_distribution_major_version >= 7
   tags: bootstrap-os