Chapter 1. Preparing to deploy OpenShift Data Foundation When you deploy OpenShift Data Foundation on OpenShift Container Platform using the local storage devices on any platform, you can create internal cluster resources. This approach internally provisions base services so that all the applications can access additional storage classes. You can also deploy OpenShift Data Foundation to use an external Red Hat Ceph Storage cluster and IBM FlashSystem. For instructions, see Deploying OpenShift Data Foundation in external mode . External mode deployment works on clusters that are detected as non-cloud. If your cluster is not detected correctly, open up a bug in Bugzilla . Before you begin the deployment of Red Hat OpenShift Data Foundation using a local storage, ensure that you meet the resource requirements. See Requirements for installing OpenShift Data Foundation using local storage devices . Optional: If you want to enable cluster-wide encryption using an external Key Management System (KMS) follow these steps: Ensure that you have a valid Red Hat OpenShift Data Foundation Advanced subscription. To know how subscriptions for OpenShift Data Foundation work, see knowledgebase article on OpenShift Data Foundation subscriptions . When the Token authentication method is selected for encryption, refer to Enabling cluster-wide encryption with the Token authentication using KMS . When the Kubernetes authentication method is selected for encryption then refer to Enabling cluster-wide encryption with KMS using the Kubernetes authentication method . Ensure that you are using signed certificates on your vault servers. After completing the preparatory steps, perform the following procedures: Install the Local Storage Operator . Install the Red Hat OpenShift Data Foundation Operator . Create the OpenShift Data Foundation cluster on any platform . 1.1. Requirements for installing OpenShift Data Foundation using local storage devices Node requirements The cluster must consist of at least three OpenShift Container Platform worker or infrastructure nodes with locally attached-storage devices on each of them. Each of the three selected nodes must have at least one raw block device available. OpenShift Data Foundation uses the one or more available raw block devices. The devices you use must be empty, the disks must not include Physical Volumes (PVs), Volume Groups (VGs), or Logical Volumes (LVs) remaining on the disk. For more information, see the Resource requirements section in the Planning guide . 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 (RHACM) for Kubernetes subscription. To know in detail how subscriptions for OpenShift Data Foundation work, see 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. Minimum starting node requirements An OpenShift Data Foundation cluster is deployed with a minimum configuration when the resource requirement for a standard deployment is not met. For more information, see the Resource requirements section in the Planning guide .

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