Wei Zhou fc44df7c95
CKS: create HA cluster with 3 control VMs instead 2 (#8297)
This PR fixes the test failures with CKS HA-cluster upgrade.
In production, the CKS HA cluster should have at least 3 control VMs as well.
The etcd cluster requires 3 members to achieve reliable HA. The etcd daemon in control VMs uses RAFT protocol to determine the roles of nodes. During upgrade of CKS with HA, the etcd become unreliable if there are only 2 control VMs.
2023-12-09 11:33:05 +05:30
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