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Chapter 1. Preparing to deploy OpenShift Data Foundation using Red Hat Virtualization platform

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Before you begin the deployment of Red Hat OpenShift Data Foundation using dynamic or local storage, ensure that your resource requirements are met. See Planning your deployment.

  1. Optional: If you want to enable cluster-wide encryption using an external Key Management System (KMS) then follow the steps:

  2. Minimum starting node requirements

    An OpenShift Data Foundation cluster will be deployed with minimum configuration when the standard deployment resource requirement is not met. See Resource requirements section in Planning guide.

  3. Regional-DR requirements [Developer preview]

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

    For detailed requirements, see Regional-DR requirements and RHACM requirements.

  4. Ensure that the requirements for installing OpenShift Data Foundation using local storage devices are met.

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 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 to be used by OpenShift Data Foundation.
Note

Make sure that the devices have a unique by-id device name for each available raw block device.

  • 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.

Regional-DR requirements [Developer preview]

Disaster Recovery features supported by Red Hat OpenShift Data Foundation require all of the following prerequisites in order 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

To know how subscriptions for OpenShift Data Foundation work, see knowledgebase article on OpenShift Data Foundation subscriptions.

For detailed requirements, see Regional-DR requirements and RHACM requirements.

Arbiter stretch cluster requirements [Technology Preview]

In this case, a single cluster is stretched across two zones with a third zone as the location for the arbiter. This is a Technology Preview feature that is currently intended for deployment in the OpenShift Container Platform on-premises and in the same data center. This solution is not recommended for deployments stretching over multiple data centers. Instead, consider Metro-DR as a first option for no data loss DR solution deployed over multiple data centers with low latency networks.

For detailed requirements and instructions, see Configuring OpenShift Data Foundation for stretch cluster.

Note

Flexible scaling and Arbiter both cannot be enabled at the same time as they have conflicting scaling logic. With Flexible scaling, you can add one node at a time to your OpenShift Data Foundation cluster. Whereas in an Arbiter cluster, you need to add at least one node in each of the two data zones.

Minimum starting node requirements

An OpenShift Data Foundation cluster is deployed with minimum configuration when the standard deployment resource requirement is not met.

For more information, see Resource requirements section in the Planning guide.

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