percona cluster next charm seeing issues in HA with 'hook failed: "shared-db-relation-changed" for mysql:shared-db'

We have the percona cluster next charm rev 37 setup in a 3 node HA mode in LXC
containers, and are seeing a hook failure fairly consistantly across different
services (heat, glance, etc) while deploying:

   'hook failed: "shared-db-relation-changed" for mysql:shared-db'

In the unit log, I see:

  2014-10-02 05:39:02 INFO shared-db-relation-changed 2014-10-02 05:39:02.368 18707 CRITICAL glance [-] OperationalError: (OperationalError) (1045, "Access denied for user 'glance'@'x-y-z-101.maas' (using password: YES)") None None

But looking on the mysql unit, I see:

mysql> select user, host from mysql.user where user = 'glance';
+--------+----------------+
| user | host |
+--------+----------------+
| glance | x.y.z.101 |
| glance | x.y.z.90 |
+--------+----------------+

mysql> show grants for 'glance'@'x.y.z.101';
+--------------------------------------------------------------------------------------------------------------------+
| Grants for glance@x.y.z.101 |
+--------------------------------------------------------------------------------------------------------------------+
| GRANT USAGE ON *.* TO 'glance'@'x.y.z.101' IDENTIFIED BY PASSWORD '*THISISREALLYNOTMYPASSWORD' |
| GRANT ALL PRIVILEGES ON `glance`.* TO 'glance'@'x.y.z.101' |
+--------------------------------------------------------------------------------------------------------------------+

A quick duplication of the grants for 'glance'@'x-y-z-101.maas' later, and then
juju resolved --retry on the glance unit works.

This seems like another issue with using LXCs and not getting the right
hostnames added for access.

Please let us know if you need any further information.