.Configuring authentication for the memcached service Starting with RHOSO 18.0.14 (Feature Release 4), you can configure the cache maintained by the memcached service to require authentication to increase the security of your cloud by restricting access to the cached data of your cloud. For more information, see link: https://docs.redhat.com/en/documentation/red_hat_openstack_services_on_openshift/18.0/html/customizing_the_red_hat_openstack_services_on_openshift_deployment/assembly_customizing-the-control-plane#proc_configuring-memcached-service-authentication_custom_controlplane [Configuring authentication for the memcached service] in Customizing the Red Hat OpenStack Services on OpenShift deployment.