support instances with no public ip

default to private ip if the instance doesn't have a public ip assigned. (causes list index out of range error otherwise)

plugins/inventory/gce.py

@@ -221,7 +221,7 @@ class GceInventory(object):
             'gce_image': inst.image,
             'gce_machine_type': inst.size,
             'gce_private_ip': inst.private_ips[0],
-            'gce_public_ip': inst.public_ips[0],
+            'gce_public_ip': inst.public_ips[0] if len(inst.public_ips) >= 1 else None,
             'gce_name': inst.name,
             'gce_description': inst.extra['description'],
             'gce_status': inst.extra['status'],
@@ -230,7 +230,7 @@ class GceInventory(object):
             'gce_metadata': md,
             'gce_network': net,
             # Hosts don't have a public name, so we add an IP
-            'ansible_ssh_host': inst.public_ips[0]
+            'ansible_ssh_host': inst.public_ips[0] if len(inst.public_ips) >= 1 else inst.private_ips[0]
         }
 
     def get_instance(self, instance_name):