ceph: improve cluster setup

Remove separate NetBox lookups. Explicitly allow connections between
cluster nodes. Tigthen temporary allowed IPv6 ranges.

filter_plugins/netbox.py

@@ -0,0 +1,15 @@
+#!/usr/bin/python
+
+class FilterModule(object):
+    '''Various utilities for manipulating NetBox data'''
+    def filters(self):
+        return {
+            'device_address': self.device_address
+        }
+
+    def device_address(self, device):
+        '''Return loopback IP addresses for an L3 attached device'''
+        for iface in device['interfaces']:
+            for addr in iface['ip_addresses']:
+                if addr.get('role') and addr['role'].get('value') == 'loopback':
+                    yield addr