Red Hat Summit3.3. Requirements for enabling Metro-DR
The prerequisites to installing a disaster recovery solution supported by Red Hat OpenShift Data Foundation are as follows:
You must have the following OpenShift clusters that have network reachability between them:
- Hub cluster where Red Hat Advanced Cluster Management (RHACM) for Kubernetes operator are installed.
- Primary managed cluster where OpenShift Data Foundation is running.
- Secondary managed cluster where OpenShift Data Foundation is running.
注記For configuring hub recovery setup, you need a 4th cluster which acts as the passive hub. The primary managed cluster (Site-1) can be co-situated with the active RHACM hub cluster while the passive hub cluster is situated along with the secondary managed cluster (Site-2). Alternatively, the active RHACM hub cluster can be placed in a neutral site (Site-3) that is not impacted by the failures of either of the primary managed cluster at Site-1 or the secondary cluster at Site-2. In this situation, if a passive hub cluster is used it can be placed with the secondary cluster at Site-2. For more information, see Configuring passive hub cluster for hub recovery.
Hub recovery is a Technology Preview feature and is subject to Technology Preview support limitations.
Ensure that RHACM operator and MultiClusterHub is installed on the Hub cluster. See RHACM installation guide for instructions.
After the operator is successfully installed, a popover with a message that the Web console update is available appears on the user interface. Click Refresh web console from this popover for the console changes to reflect.
Ensure that application traffic routing and redirection are configured appropriately.
On the Hub cluster
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Navigate to All Clusters
Infrastructure Clusters. - Import or create the Primary managed cluster and the Secondary managed cluster using the RHACM console.
- Choose the appropriate options for your environment.
After the managed clusters are successfully created or imported, you can see the list of clusters that were imported or created on the console. For instructions, see Creating a cluster and Importing a target managed cluster to the hub cluster.
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Navigate to All Clusters
The Openshift Container Platform managed clusters and the Red Hat Ceph Storage (RHCS) nodes have distance limitations. The network latency between the sites must be below 10 milliseconds round-trip time (RTT).
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