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* xref:../../edge_computing/image_based_upgrade/cnf-image-based-upgrade-base.adoc#cnf-image-based-upgrade[Performing an image-based upgrade for {sno} clusters with {lcao}]
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* xref:../../edge_computing/image_based_upgrade/ztp-image-based-upgrade.adoc#ztp-image-based-upgrade[Performing an image-based upgrade for {sno} clusters using {ztp}]
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You can use a single resource on the hub cluster, the `ImageBasedGroupUpgrade` custom resource (CR), to manage an imaged-based upgrade on a selected group of managed clusters through all stages.
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{cgu-operator-first} reconciles the `ImageBasedGroupUpgrade` CR and creates the underlying resources to complete the defined stage transitions, either in a manually controlled or a fully automated upgrade flow.
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For more information about the image-based upgrade, see "Understanding the image-based upgrade for single-node OpenShift clusters".
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You can use a single resource on the hub cluster, the `ImageBasedGroupUpgrade` custom resource (CR), to manage an imaged-based upgrade on a selected group of managed clusters through all stages.
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{cgu-operator-first} reconciles the `ImageBasedGroupUpgrade` CR and creates the underlying resources to complete the defined stage transitions, either in a manually controlled or a fully automated upgrade flow.
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[role="_additional-resources"]
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.Additional resources
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* xref:../../edge_computing/image_based_upgrade/cnf-understanding-image-based-upgrade.adoc#cnf-understanding-image-based-upgrade[Understanding the image-based upgrade for single-node OpenShift clusters]
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* xref:../../backup_and_restore/control_plane_backup_and_restore/disaster_recovery/scenario-3-expired-certs.adoc#dr-scenario-3-recovering-expired-certs_dr-recovering-expired-certs[Recovering from expired control plane certificates]
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////
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* xref:../../edge_computing/ztp-preparing-the-hub-cluster.adoc#ztp-preparing-the-ztp-git-repository-ver-ind_ztp-preparing-the-hub-cluster[Preparing the {ztp} site configuration repository for version independence]
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* xref:../../backup_and_restore/application_backup_and_restore/backing_up_and_restoring/oadp-creating-backup-cr.adoc#oadp-creating-backup-cr-doc[Creating a Backup CR]
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* xref:../../backup_and_restore/application_backup_and_restore/backing_up_and_restoring/restoring-applications.adoc#oadp-creating-restore-cr_restoring-applications[Creating a Restore CR]
Copy file name to clipboardExpand all lines: installing/installing_openstack/installing-openstack-three-node.adoc
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In {product-title} version {product-version}, you can install a three-node cluster on {rh-openstack-first}. A three-node cluster consists of three control plane machines, which also act as compute machines. This type of cluster provides a smaller, more resource efficient cluster, for cluster administrators and developers to use for testing, development, and production.
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You can install a three-node cluster on installer-provisioned infrastructure only.
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You can install a three-node cluster by using either installer-provisioned or user-provisioned infrastructure.
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* xref:../../installing/installing_openstack/installing-openstack-installer-custom.adoc#installing-openstack-installer-custom[Installing a cluster on OpenStack with customizations]
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* xref:../../installing/installing_openstack/installing-openstack-installer-custom.adoc#installing-openstack-installer-custom[Installing a cluster on OpenStack with customizations]
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* xref:../../installing/installing_openstack/installing-openstack-installer-custom.adoc#installing-openstack-installer-custom[Installing a cluster on OpenStack with customizations]
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* xref:../../installing/installing_openstack/installing-openstack-user.adoc#installing-openstack-user[Installing a cluster on OpenStack on your own infrastructure]
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