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Chapter 1. Configuring and deploying a Red Hat OpenStack Platform hyperconverged infrastructure

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1.1. Hyperconverged infrastructure overview

Red Hat OpenStack Platform (RHOSP) hyperconverged infrastructures (HCI) consist of hyperconverged nodes. In RHOSP HCI, the Compute and Storage services are colocated on these hyperconverged nodes for optimized resource use. You can deploy an overcloud with only hyperconverged nodes, or a mixture of hyperconverged nodes with normal Compute and Red Hat Ceph Storage nodes.

Note

You must use Red Hat Ceph Storage as the storage provider.

Tip

Use BlueStore as the back end for HCI deployments to make use of the BlueStore memory handling features.

Hyperconverged infrastructures are built using a variation of the deployment process described in Deploying Red Hat Ceph and OpenStack together with director. In this deployment scenario, RHOSP director deploys your cloud environment, which director calls the overcloud, and Red Hat Ceph Storage. You manage and scale the Ceph cluster itself separate from the overcloud configuration.

Important

Instance HA is not supported on RHOSP HCI environments. To use Instance HA in your RHOSP HCI environment, you must designate a subset of the Compute nodes with the ComputeInstanceHA role to use the Instance HA. Red Hat Ceph Storage services must not be hosted on the Compute nodes that host Instance HA.

Red Hat OpenStack Platform 17.1 only supports Red Hat Ceph Storage 6 for new deployments. Red Hat Ceph Storage 5 is not supported in new deployment scenarios.

Important

All HCI nodes in supported Hyperconverged Infrastructure environments must use the same version of Red Hat Enterprise Linux as the version used by the Red Hat OpenStack Platform controllers. If you wish to use multiple Red Hat Enterprise versions in a hybrid state on HCI nodes in the same Hyperconverged Infrastructure environment, contact the Red Hat Customer Experience and Engagement team to discuss a support exception.

For HCI configuration guidance, see Configuration guidance.

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