For a cloud controller manager (CCM) with the --cloud-provider=external option set to cloud-provider-vsphere , a known issue exists for a cluster that operates in a networking environment with multiple subnets.
When you upgrade your cluster from OpenShift Container Platform 4.12 to OpenShift Container Platform 4.13, the CCM selects a wrong node IP address and this operation generates an error message in the namespaces/openshift-cloud-controller-manager/pods/vsphere-cloud-controller-manager logs. The error message indicates a mismatch with the node IP address and the vsphere-cloud-controller-manager pod IP address in your cluster.
The known issue might not impact the cluster upgrade operation, but you can set the correct IP address in both the nodeNetworking.external.networkSubnetCidr and the nodeNetworking.internal.networkSubnetCidr parameters for the nodeNetworking object that your cluster uses for its networking requirements.
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