If most of the nodes in the Raft cluster are corrupted and the cluster is inoperable, the following recovery methods are available:
As a result, you get a new cluster with a single node that has the KUMA Core service installed. If you need high availability, you can restore the KUMA Core services on the old nodes or install KUMA Core services on new nodes and add these nodes to the Raft cluster. You do not need to reset certificates of microservices, such as collectors, correlators, storages, and others, but if you are restoring from backup, you may need to change the value of the --core parameter in the systemd file to make the services communicate with the correct KUMA Core if the list of cluster nodes is changed as part of the restoration process.