Comments (3)
csuzhangxc
commented on July 3, 2024
fmt.Sprintf("--pd=%s-pd.%s:%d", backup.Spec.BR.Cluster, clusterNamespace, v1alpha1.DefaultPDClientPort) is a K8s service with all PD members as the backend.
it should resolve to other PD members in different DNS lookup calls.
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kennytm
commented on July 3, 2024
@csuzhangxc what is actually seen from the log is that we received a DNS lookup error from CDC:
pd address (cluster-pd.namespace:2379) not available, error is
Get "https://cluster-pd.namespace:2379/pd/api/v1/config/cluster-version":
dial tcp: lookup cluster-pd.namespace on 100.64.0.10:53: no such host,please check network: [BR:PD:ErrPDUpdateFailed]failed to update PD
is there any chance that switching PD leader will cause the DNS to report NXDOMAIN or return with zero A/AAAA records in the ANSWER section?
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csuzhangxc
commented on July 3, 2024
is there any chance that switching PD leader will cause the DNS to report NXDOMAIN or return with zero A/AAAA records in the ANSWER section?
NO, can not resolve DNS should often be caused by the PD pod being down (or KubeDNS having problems)
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