diff --git a/ansible/roles/trove/templates/trove-guestagent.conf.j2 b/ansible/roles/trove/templates/trove-guestagent.conf.j2
index 27acf78b23..112b22f7d4 100644
--- a/ansible/roles/trove/templates/trove-guestagent.conf.j2
+++ b/ansible/roles/trove/templates/trove-guestagent.conf.j2
@@ -1,10 +1,21 @@
 [DEFAULT]
+log_file = trove-guestagent.log
+log_dir = /var/log/trove/
 transport_url = {{ rpc_transport_url }}
 control_exchange = trove
 root_grant = ALL
 root_grant_option = True
 debug = {{ trove_logging_debug }}
 
+[service_credentials]
+auth_url = {{ keystone_internal_url }}
+region_name = {{ openstack_region_name }}
+project_name = service
+password = {{ trove_keystone_password }}
+project_domain_name = {{ default_project_domain_name }}
+user_domain_name = {{ default_user_domain_name }}
+username = {{ trove_keystone_user }}
+
 [oslo_messaging_rabbit]
 heartbeat_in_pthread = false
 {% if om_enable_rabbitmq_high_availability | bool %}
diff --git a/releasenotes/notes/fix-trove-failed-to-backup-2ae4e4a301638585.yaml b/releasenotes/notes/fix-trove-failed-to-backup-2ae4e4a301638585.yaml
new file mode 100644
index 0000000000..8cf1817c4a
--- /dev/null
+++ b/releasenotes/notes/fix-trove-failed-to-backup-2ae4e4a301638585.yaml
@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    Fix trove failed to discover swift endpoint due to the missing of
+    `service_credentials` in guest-agent.conf.
+    see `bug 2048829 <https://bugs.launchpad.net/kolla-ansible/+bug/2048829>`__