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Cluster information:
Kubernetes version: 1.15.3
Cloud being used: (put bare-metal if not on a public cloud) AWS
Installation method: Ansible
Host OS: Red Hat Enterprise Linux Server release 7.9 (Maipo)
CNI and version: 10-flannel.conflist
CRI and version: docker://18.9.9
On Master node I’m tring to connect to 30888 with localhost.
But If I’m tring to connect same port on worker node its connecting.
[root@STLAWSXAI03 ysudhir]# telnet 127.0.0.1 30888
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.
^CConnection closed by foreign host.
Logs in journalctl -xeu kubelet
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.468798 11932 kuberuntime_manager.go:928] updating runtime config through cri with podcidr 10.244.0.0/24
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.468964 11932 docker_service.go:353] docker cri received runtime config &RuntimeConfig{NetworkConfig:&Networ
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.469113 11932 kubelet_network.go:77] Setting Pod CIDR: -> 10.244.0.0/24
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: E1018 08:55:18.499068 11932 reflector.go:125] object-"kube-system"/"flannel-token-2g6q2": Failed to list *v1.Secret: secre
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: E1018 08:55:18.499135 11932 reflector.go:125] object-"kube-system"/"kube-flannel-cfg": Failed to list *v1.ConfigMap: confi
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: E1018 08:55:18.499182 11932 reflector.go:125] object-"kube-system"/"coredns": Failed to list *v1.ConfigMap: configmaps "co
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: E1018 08:55:18.499218 11932 reflector.go:125] object-"kube-system"/"coredns-token-d5wx4": Failed to list *v1.Secret: secre
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: E1018 08:55:18.499566 11932 reflector.go:125] object-"kube-system"/"kube-proxy-token-45bkr": Failed to list *v1.Secret: se
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: E1018 08:55:18.499623 11932 reflector.go:125] object-"kube-system"/"kube-proxy": Failed to list *v1.ConfigMap: configmaps
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.582777 11932 reconciler.go:203] operationExecutor.VerifyControllerAttachedVolume started for volume "flanne
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.582831 11932 reconciler.go:203] operationExecutor.VerifyControllerAttachedVolume started for volume "flanne
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.582862 11932 reconciler.go:203] operationExecutor.VerifyControllerAttachedVolume started for volume "run" (
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.582890 11932 reconciler.go:203] operationExecutor.VerifyControllerAttachedVolume started for volume "cni" (
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.582919 11932 reconciler.go:203] operationExecutor.VerifyControllerAttachedVolume started for volume "config
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.582948 11932 reconciler.go:203] operationExecutor.VerifyControllerAttachedVolume started for volume "coredn
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.582973 11932 reconciler.go:203] operationExecutor.VerifyControllerAttachedVolume started for volume "flanne
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.582998 11932 reconciler.go:203] operationExecutor.VerifyControllerAttachedVolume started for volume "flanne
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.583025 11932 reconciler.go:203] operationExecutor.VerifyControllerAttachedVolume started for volume "run" (
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.583050 11932 reconciler.go:203] operationExecutor.VerifyControllerAttachedVolume started for volume "cni" (
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.583076 11932 reconciler.go:203] operationExecutor.VerifyControllerAttachedVolume started for volume "kube-p
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.583104 11932 reconciler.go:203] operationExecutor.VerifyControllerAttachedVolume started for volume "kube-p
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.583128 11932 reconciler.go:203] operationExecutor.VerifyControllerAttachedVolume started for volume "xtable
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.583154 11932 reconciler.go:203] operationExecutor.VerifyControllerAttachedVolume started for volume "lib-mo
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.583168 11932 reconciler.go:150] Reconciler: start to sync state
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.720943 11932 kubelet_node_status.go:114] Node stlawsxai01 was previously registered
Oct 18 08:55:18 STLAWSXAI01 kubelet[11932]: I1018 08:55:18.721046 11932 kubelet_node_status.go:75] Successfully registered node stlawsxai01
Oct 18 08:55:19 STLAWSXAI01 kubelet[11932]: E1018 08:55:19.688212 11932 configmap.go:203] Couldn't get configMap kube-system/kube-flannel-cfg: couldn't propagate obje
Oct 18 08:55:19 STLAWSXAI01 kubelet[11932]: E1018 08:55:19.688361 11932 nestedpendingoperations.go:270] Operation for "\"kubernetes.io/configmap/34169b63-cb9b-412b-8
Oct 18 08:55:19 STLAWSXAI01 kubelet[11932]: E1018 08:55:19.688422 11932 secret.go:198] Couldn't get secret kube-system/flannel-token-2g6q2: couldn't propagate object
Oct 18 08:55:19 STLAWSXAI01 kubelet[11932]: E1018 08:55:19.688486 11932 nestedpendingoperations.go:270] Operation for "\"kubernetes.io/secret/34169b63-cb9b-412b-8770-
Oct 18 08:55:19 STLAWSXAI01 kubelet[11932]: E1018 08:55:19.688507 11932 secret.go:198] Couldn't get secret kube-system/kube-proxy-token-45bkr: couldn't propagate obje
Oct 18 08:55:19 STLAWSXAI01 kubelet[11932]: E1018 08:55:19.688550 11932 nestedpendingoperations.go:270] Operation for "\"kubernetes.io/secret/bb29d169-0ac5-4782-928d-
Oct 18 08:55:19 STLAWSXAI01 kubelet[11932]: E1018 08:55:19.688567 11932 configmap.go:203] Couldn't get configMap kube-system/kube-proxy: couldn't propagate object cac
Oct 18 08:55:19 STLAWSXAI01 kubelet[11932]: E1018 08:55:19.688620 11932 nestedpendingoperations.go:270] Operation for "\"kubernetes.io/configmap/bb29d169-0ac5-4782-92
Oct 18 08:55:19 STLAWSXAI01 kubelet[11932]: E1018 08:55:19.688644 11932 configmap.go:203] Couldn't get configMap kube-system/kube-flannel-cfg: couldn't propagate obje
Oct 18 08:55:19 STLAWSXAI01 kubelet[11932]: E1018 08:55:19.688685 11932 nestedpendingoperations.go:270] Operation for "\"kubernetes.io/configmap/656541ca-c19b-4674-b7
Oct 18 08:55:19 STLAWSXAI01 kubelet[11932]: E1018 08:55:19.688719 11932 secret.go:198] Couldn't get secret kube-system/flannel-token-2g6q2: couldn't propagate object
Oct 18 08:55:19 STLAWSXAI01 kubelet[11932]: E1018 08:55:19.688760 11932 nestedpendingoperations.go:270] Operation for "\"kubernetes.io/secret/656541ca-c19b-4674-b75e-
Oct 18 08:55:19 STLAWSXAI01 kubelet[11932]: E1018 08:55:19.688778 11932 configmap.go:203] Couldn't get configMap kube-system/coredns: couldn't propagate object cache:
Oct 18 08:55:19 STLAWSXAI01 kubelet[11932]: E1018 08:55:19.688818 11932 nestedpendingoperations.go:270] Operation for "\"kubernetes.io/configmap/07bc1632-d4b7-46e9-91
Oct 18 08:55:19 STLAWSXAI01 kubelet[11932]: E1018 08:55:19.688836 11932 secret.go:198] Couldn't get secret kube-system/coredns-token-d5wx4: couldn't propagate object
Oct 18 08:55:19 STLAWSXAI01 kubelet[11932]: E1018 08:55:19.688875 11932 nestedpendingoperations.go:270] Operation for "\"kubernetes.io/secret/07bc1632-d4b7-46e9-9178-
Oct 18 08:55:20 STLAWSXAI01 kubelet[11932]: W1018 08:55:20.313476 11932 kuberuntime_container.go:691] No ref for container {"docker" "d3498175b47219e6fa08dc39982a1062
Oct 18 08:55:20 STLAWSXAI01 kubelet[11932]: W1018 08:55:20.574165 11932 cni.go:309] CNI failed to retrieve network namespace path: cannot find network namespace for t
Oct 18 08:55:21 STLAWSXAI01 kubelet[11932]: W1018 08:55:21.325861 11932 pod_container_deletor.go:75] Container "f1e89f46946064c4d3d1a5d309bd8b400bd623630aff311c905717
Oct 18 12:34:57 STLAWSXAI01 kubelet[11932]: W1018 12:34:57.523479 11932 reflector.go:302] k8s.io/kubernetes/pkg/kubelet/config/apiserver.go:47: watch of *v1.Pod ended
Oct 18 17:52:06 STLAWSXAI01 kubelet[11932]: W1018 17:52:06.578242 11932 reflector.go:302] k8s.io/kubernetes/pkg/kubelet/config/apiserver.go:47: watch of *v1.Pod ended
Oct 18 23:11:52 STLAWSXAI01 kubelet[11932]: W1018 23:11:52.635685 11932 reflector.go:302] k8s.io/kubernetes/pkg/kubelet/config/apiserver.go:47: watch of *v1.Pod ended
Oct 19 04:31:29 STLAWSXAI01 kubelet[11932]: W1019 04:31:29.686957 11932 reflector.go:302] k8s.io/kubernetes/pkg/kubelet/config/apiserver.go:47: watch of *v1.Pod ended
Can you please tell, is there any configuration issue I need to check or any port need to open in my security group.