diff --git a/charmhelpers/contrib/charmsupport/nrpe.py b/charmhelpers/contrib/charmsupport/nrpe.py
index f59fdd6b..0626b328 100644
--- a/charmhelpers/contrib/charmsupport/nrpe.py
+++ b/charmhelpers/contrib/charmsupport/nrpe.py
@@ -126,7 +126,7 @@ class CheckException(Exception):
 
 
 class Check(object):
-    shortname_re = '[A-Za-z0-9-_.]+$'
+    shortname_re = '[A-Za-z0-9-_.@]+$'
     service_template = ("""
 #---------------------------------------------------
 # This file is Juju managed
diff --git a/charmhelpers/contrib/openstack/context.py b/charmhelpers/contrib/openstack/context.py
index d892bad9..8a203754 100644
--- a/charmhelpers/contrib/openstack/context.py
+++ b/charmhelpers/contrib/openstack/context.py
@@ -97,6 +97,7 @@ from charmhelpers.contrib.network.ip import (
 )
 from charmhelpers.contrib.openstack.utils import (
     config_flags_parser,
+    get_os_codename_install_source,
     enable_memcache,
     CompareOpenStackReleases,
     os_release,
@@ -240,6 +241,8 @@ class SharedDBContext(OSContextGenerator):
         else:
             rids = relation_ids(self.interfaces[0])
 
+        rel = (get_os_codename_install_source(config('openstack-origin')) or
+               'icehouse')
         for rid in rids:
             self.related = True
             for unit in related_units(rid):
@@ -253,6 +256,8 @@ class SharedDBContext(OSContextGenerator):
                     'database_password': rdata.get(password_setting),
                     'database_type': 'mysql+pymysql'
                 }
+                if CompareOpenStackReleases(rel) < 'stein':
+                    ctxt['database_type'] = 'mysql'
                 if self.context_complete(ctxt):
                     db_ssl(rdata, ctxt, self.ssl_dir)
                     return ctxt