diff --git a/zaza/openstack/charm_tests/glance_simplestreams_sync/setup.py b/zaza/openstack/charm_tests/glance_simplestreams_sync/setup.py
index ec6107b..96648af 100644
--- a/zaza/openstack/charm_tests/glance_simplestreams_sync/setup.py
+++ b/zaza/openstack/charm_tests/glance_simplestreams_sync/setup.py
@@ -18,9 +18,31 @@
 
 import logging
 import tenacity
+import pprint
 
 import zaza.model as zaza_model
 import zaza.openstack.utilities.generic as generic_utils
+import zaza.openstack.utilities.openstack as openstack_utils
+
+
+def _get_catalog():
+    """Retrieve the Keystone service catalog.
+
+    :returns: The raw Keystone service catalog.
+    :rtype: List[Dict]
+    """
+    keystone_session = openstack_utils.get_overcloud_keystone_session()
+    keystone_client = openstack_utils.get_keystone_session_client(
+        keystone_session)
+
+    token = keystone_session.get_token()
+    token_data = keystone_client.tokens.get_token_data(token)
+
+    if 'catalog' not in token_data['token']:
+        raise ValueError('catalog not in token data: "{}"'
+                         .format(pprint.pformat(token_data)))
+
+    return token_data['token']['catalog']
 
 
 def sync_images():
@@ -31,17 +53,27 @@ def sync_images():
     deployment.
     """
     logging.info("Synchronising images using glance-simplestreams-sync")
-    for attempt in tenacity.Retrying(
-            stop=tenacity.stop_after_attempt(3),
-            wait=tenacity.wait_exponential(
-                multiplier=1, min=2, max=10),
-            reraise=True):
-        with attempt:
-            generic_utils.assertActionRanOK(
-                zaza_model.run_action_on_leader(
-                    "glance-simplestreams-sync",
-                    "sync-images",
-                    raise_on_failure=True,
-                    action_params={},
+
+    catalog = None
+    try:
+        for attempt in tenacity.Retrying(
+                stop=tenacity.stop_after_attempt(3),
+                wait=tenacity.wait_exponential(
+                    multiplier=1, min=2, max=10),
+                reraise=True):
+            with attempt:
+                # Proactively retrieve the Keystone service catalog so that we
+                # can log it in the event of a failure.
+                catalog = _get_catalog()
+                generic_utils.assertActionRanOK(
+                    zaza_model.run_action_on_leader(
+                        "glance-simplestreams-sync",
+                        "sync-images",
+                        raise_on_failure=True,
+                        action_params={},
+                    )
                 )
-            )
+    except Exception:
+        logging.info('Contents of Keystone service catalog: "{}"'
+                     .format(pprint.pformat(catalog)))
+        raise