补一个集群拓扑，感觉像是连通性的问题
test-discovery ClusterIP 10.96.73.219 <none> 10261/TCP,10262/TCP 72d
test-grafana NodePort 10.96.15.87 <none> 3000:32255/TCP 72d
test-monitor-reloader NodePort 10.96.170.18 <none> 9089:30505/TCP 72d
test-pd ClusterIP 10.96.13.105 <none> 2379/TCP 72d
test-pd-peer ClusterIP None <none> 2380/TCP 72d
test-prometheus NodePort 10.96.250.229 <none> 9090:31017/TCP 72d
test-tidb NodePort 10.96.39.181 <none> 4000:30401/TCP,10080:31070/TCP 72d
test-tidb-peer ClusterIP None <none> 10080/TCP 72d
test-tiflash-peer ClusterIP None <none> 3930/TCP,20170/TCP 134m
test-tikv-peer ClusterIP None <none> 20160/TCP 72d