.Introducing external mode Red Hat OpenShift Container Storage exposes the Red Hat Ceph Storage services running outside of the OpenShift Container Platform cluster as storage classes. The external mode will mainly be used in the following cases: * Multiple OpenShift Container Storage clusters required to consume storage services from a common external cluster * Separate team (SRE, Storage, etc.) needs to manage the external cluster providing storage service For more information, see https://access.redhat.com/documentation/en-us/red_hat_openshift_container_storage/4.5/html-single/planning_your_deployment/index#external-mode-requirements_rhocs[External mode requirements] and https://access.redhat.com/documentation/en-us/red_hat_openshift_container_storage/4.5/html-single/deploying_openshift_container_storage/index#creating-an-openshift-container-storage-cluster-service-for-external-storage_aws-vmware[how to create external storage cluster service]