Scale a cluster with 18187 pods, did't see large range reads on pods in 4.8.0-0.nightly-2022-05-26-082821 [weliang@weliang ~]$ oc logs etcd-ip-10-0-196-2.us-east-2.compute.internal | grep range_response_count error: a container name must be specified for pod etcd-ip-10-0-196-2.us-east-2.compute.internal, choose one of: [etcdctl etcd etcd-metrics etcd-health-monitor] or one of the init containers: [setup etcd-ensure-env-vars etcd-resources-copy] [weliang@weliang ~]$ oc logs etcd-ip-10-0-196-2.us-east-2.compute.internal -c etcd | grep range_response_count {"level":"warn","ts":"2022-05-26T19:22:55.030Z","caller":"etcdserver/util.go:163","msg":"apply request took too long","took":"127.981229ms","expected-duration":"100ms","prefix":"read-only range ","request":"key:\"/kubernetes.io/namespaces/e03f8864-3a62-40de-8f74-8ff16286539f\" ","response":"range_response_count:1 size:1007"} {"level":"warn","ts":"2022-05-26T19:22:55.030Z","caller":"etcdserver/util.go:163","msg":"apply request took too long","took":"123.276821ms","expected-duration":"100ms","prefix":"read-only range ","request":"key:\"/kubernetes.io/serviceaccounts/openshift-kube-controller-manager/localhost-recovery-client\" ","response":"range_response_count:1 size:424"} {"level":"warn","ts":"2022-05-26T19:22:55.031Z","caller":"etcdserver/util.go:163","msg":"apply request took too long","took":"114.272541ms","expected-duration":"100ms","prefix":"read-only range ","request":"key:\"/kubernetes.io/pods/e03f8864-3a62-40de-8f74-8ff16286539f/node-density-10564\" ","response":"range_response_count:1 size:3528"} {"level":"warn","ts":"2022-05-26T19:22:55.031Z","caller":"etcdserver/util.go:163","msg":"apply request took too long","took":"122.457013ms","expected-duration":"100ms","prefix":"read-only range ","request":"key:\"/kubernetes.io/pods/e03f8864-3a62-40de-8f74-8ff16286539f/node-density-10565\" ","response":"range_response_count:1 size:3528"} {"level":"warn","ts":"2022-05-26T19:28:07.872Z","caller":"etcdserver/util.go:163","msg":"apply request took too long","took":"107.118251ms","expected-duration":"100ms","prefix":"read-only range ","request":"key:\"/kubernetes.io/pods/e03f8864-3a62-40de-8f74-8ff16286539f/\" range_end:\"/kubernetes.io/pods/e03f8864-3a62-40de-8f74-8ff16286539f0\" ","response":"range_response_count:16806 size:60876093"} [weliang@weliang ~]$ oc get pod --all-namespaces | wc -l 18187 [weliang@weliang ~]$ oc get clusterversion NAME VERSION AVAILABLE PROGRESSING SINCE STATUS version 4.8.0-0.nightly-2022-05-26-082821 True False 70m Cluster version is 4.8.0-0.nightly-2022-05-26-082821 [weliang@weliang ~]$
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (OpenShift Container Platform 4.8.42 bug fix update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2022:4737