Chapter 1. Overview of deploying in external mode


Red Hat OpenShift Data Foundation can make services from an external Red Hat Ceph Storage cluster available for consumption through OpenShift Container Platform clusters running on any platform.

See Planning your deployment for more information.

For instructions regarding how to install a RHCS cluster, see the installation guide.

Follow these steps to deploy OpenShift Data Foundation in external mode:

1.1. Disaster recovery requirements

Disaster Recovery features supported by Red Hat OpenShift Data Foundation require all of the following prerequisites to successfully implement a disaster recovery solution:

  • A valid Red Hat OpenShift Data Foundation Advanced subscription
  • A valid Red Hat Advanced Cluster Management for Kubernetes subscription

For more information, see the knowledgebase article on OpenShift Data Foundation subscriptions.

For detailed disaster recovery solution requirements, see Configuring OpenShift Data Foundation Disaster Recovery for OpenShift Workloads guide, and Requirements and recommendations section of the Install guide in Red Hat Advanced Cluster Management for Kubernetes documentation.

1.2. Network ports required between OpenShift Container Platform and Ceph when using external mode deployment

List of TCP ports, source OpenShift Container Platform and destination RHCS

TCP portsTo be used for

6789, 3300

Ceph Monitor

6800 - 7300

Ceph OSD, MGR, MDS

9283

Ceph MGR Prometheus Exporter

For more information about why these ports are required, see Chapter 2. Ceph network configuration of RHCS Configuration Guide.

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