Add a helpful error message to nova-manage in case of NoMoreNetworks.

This is one of the most common problems people have, and the solution
is not currently easily discoverable. This should address that.

1 files changed, 8 insertions, 3 deletions

diff --git a/bin/nova-manage b/bin/nova-manage
index eb7c6b87b..62eec8353 100755
--- a/bin/nova-manage
+++ b/bin/nova-manage
@@ -359,9 +359,14 @@ class ProjectCommands(object):
     def zipfile(self, project_id, user_id, filename='nova.zip'):
         """Exports credentials for project to a zip file
         arguments: project_id user_id [filename='nova.zip]"""
-        zip_file = self.manager.get_credentials(user_id, project_id)
-        with open(filename, 'w') as f:
-            f.write(zip_file)
+        try:
+            zip_file = self.manager.get_credentials(user_id, project_id)
+            with open(filename, 'w') as f:
+                f.write(zip_file)
+        except db.api.NoMoreNetworks:
+            print ('No more networks available. If this is a new '
+                   'installation, you need\nto call something like this:\n\n'
+                   '    nova-manage network create 10.0.0.0/8 10 64\n\n')
 
 
 class FloatingIpCommands(object):