High Priority P1 issue - Consul error while upgrading our on-prem k8s user cluster

Hi Team,

I’m trying to upgrade my GKE on-prem Anthos K8s cluster, and we have consul installed in our cluster which was working fine, the upgrade got failed, with the following errors… what could be the cause?

The error from consul-connect-injector pod.
[ERROR] consul-server-connection-manager.consul-server-connection-manager: connection error: error=“failed to discover Consul server addresses: failed to resolve DNS name: consul-server.consul.svc: lookup consul-server.consul.svc on no such host”