diff --git a/ansible/roles/zun/templates/zun.conf.j2 b/ansible/roles/zun/templates/zun.conf.j2
index 89e82ccd73..8ff658d132 100644
--- a/ansible/roles/zun/templates/zun.conf.j2
+++ b/ansible/roles/zun/templates/zun.conf.j2
@@ -72,22 +72,27 @@ memcached_servers = {% for host in groups['memcached'] %}{{ 'api' | kolla_addres
 [zun_client]
 region_name = {{ openstack_region_name }}
 endpoint_type = internalURL
+ca_file = {{ openstack_cacert }}
 
 [glance_client]
 region_name = {{ openstack_region_name }}
 endpoint_type = internalURL
+ca_file = {{ openstack_cacert }}
 
 [neutron_client]
 region_name = {{ openstack_region_name }}
 endpoint_type = internalURL
+ca_file = {{ openstack_cacert }}
 
 [cinder_client]
 region_name = {{ openstack_region_name }}
 endpoint_type = internalURL
+ca_file = {{ openstack_cacert }}
 
 [placement_client]
 region_name = {{ openstack_region_name }}
 endpoint_type = internalURL
+ca_file = {{ openstack_cacert }}
 
 {% if enable_osprofiler | bool %}
 [profiler]