[Exercise 2.2: Deploy a New Cluster] Hit "node xx not found" issue
I followed the guide to create my cluster on Ali Cloud, and the two instances with 2cpu, 8G.
root@master:~# cat /etc/hosts 10.250.115.210 master 10.250.115.211 slaver root@master:~# hostname master
the kubeadm init
always block at following block
I0201 00:57:06.271718 29692 waitcontrolplane.go:91] [wait-control-plane] Waiting for the API server to be healthy [wait-control-plane] Waiting for the kubelet to boot up the control plane as static Pods from directory "/etc/kubernetes/manifests". This can take up to 4m0s [kubelet-check] Initial timeout of 40s passed.
I googled it and found the following issue seems like what I met.
https://github.com/cri-o/cri-o/issues/2357
https://github.com/kubernetes/kubeadm/issues/1153
https://github.com/kubernetes/kubeadm/issues/2370
https://github.com/kubernetes/kubernetes/issues/106464
I did remove the docker if it exists, and double confirm the type of container group is the same in crio and kubelet. the error reporting is still kubelet's problem like below:
Feb 01 00:57:19 master kubelet[29902]: E0201 00:57:19.198073 29902 kubelet.go:2422] "Error getting node" err="node \"master\" not found" Feb 01 00:57:19 master kubelet[29902]: E0201 00:57:19.298393 29902 kubelet.go:2422] "Error getting node" err="node \"master\" not found" Feb 01 00:57:19 master kubelet[29902]: E0201 00:57:19.398656 29902 kubelet.go:2422] "Error getting node" err="node \"master\" not found" Feb 01 00:57:19 master kubelet[29902]: E0201 00:57:19.499651 29902 kubelet.go:2422] "Error getting node" err="node \"master\" not found" Feb 01 00:57:19 master kubelet[29902]: E0201 00:57:19.599724 29902 kubelet.go:2422] "Error getting node" err="node \"master\" not found" Feb 01 00:57:19 master kubelet[29902]: E0201 00:57:19.700032 29902 kubelet.go:2422] "Error getting node" err="node \"master\" not found" Feb 01 00:57:19 master kubelet[29902]: E0201 00:57:19.800410 29902 kubelet.go:2422] "Error getting node" err="node \"master\" not found" Feb 01 00:57:19 master kubelet[29902]: E0201 00:57:19.900674 29902 kubelet.go:2422] "Error getting node" err="node \"master\" not found" Feb 01 00:57:20 master kubelet[29902]: E0201 00:57:20.001051 29902 kubelet.go:2422] "Error getting node" err="node \"master\" not found" Feb 01 00:57:20 master kubelet[29902]: E0201 00:57:20.101439 29902 kubelet.go:2422] "Error getting node" err="node \"master\" not found"
I tried to upgrade the kubeadm, kubelet, kubectl to the newest version 1.23.3
. it seems not to work. is there anyone who may give some insight about it? thanks.
BTW, below is the kubeadm.yaml
serve for kubeadm init
.
apiVersion: kubeadm.k8s.io/v1beta2 bootstrapTokens: - groups: - system:bootstrappers:kubeadm:default-node-token token: abcdef.0123456789abcdef ttl: 24h0m0s usages: - signing - authentication kind: InitConfiguration localAPIEndpoint: bindPort: 6443 nodeRegistration: criSocket: unix:///var/run/crio/crio.sock name: master taints: null --- apiServer: timeoutForControlPlane: 4m0s apiVersion: kubeadm.k8s.io/v1beta2 certificatesDir: /etc/kubernetes/pki clusterName: kubernetes controllerManager: {} dns: type: CoreDNS etcd: local: dataDir: /var/lib/etcd imageRepository: registry.aliyuncs.com/google_containers kind: ClusterConfiguration kubernetesVersion: 1.23.3 networking: dnsDomain: cluster.local serviceSubnet: 10.96.0.0/12 podSubnet: 192.168.0.0/16 scheduler: {} --- apiVersion: kubelet.config.k8s.io/v1beta1 authentication: anonymous: enabled: false webhook: cacheTTL: 0s enabled: true x509: clientCAFile: /etc/kubernetes/pki/ca.crt authorization: mode: Webhook webhook: cacheAuthorizedTTL: 0s cacheUnauthorizedTTL: 0s cgroupDriver: systemd clusterDNS: - 10.96.0.10 clusterDomain: cluster.local cpuManagerReconcilePeriod: 0s evictionPressureTransitionPeriod: 0s fileCheckFrequency: 0s healthzBindAddress: 127.0.0.1 healthzPort: 10248 httpCheckFrequency: 0s imageMinimumGCAge: 0s kind: KubeletConfiguration logging: {} nodeStatusReportFrequency: 0s nodeStatusUpdateFrequency: 0s resolvConf: /run/systemd/resolve/resolv.conf rotateCertificates: true runtimeRequestTimeout: 0s shutdownGracePeriod: 0s shutdownGracePeriodCriticalPods: 0s staticPodPath: /etc/kubernetes/manifests streamingConnectionIdleTimeout: 0s syncFrequency: 0s volumeStatsAggPeriod: 0s
Best Answer
-
it is caused by the API server is not healthy.
0
Answers
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I forgot one thing, I tested it locally in VMware Pro with the same configuration, and the problem remains the same.
0 -
Hi @yang.wang11,
Kubernetes is highly sensitive to VM instance/Node networking configuration. Have you had a chance to watch the two cluster set up videos for AWS and GCP? While they are different cloud providers, it is possible you may find some networking and firewall configuration tips that can be used in other cloud settings or local hypervisors.
I would also stick with the recommended Kubernetes v1.22.1, as per the lab guide, and the VM guest OS - Ubuntu 18.04 LTS. Disable guest OS firewalls if any are enabled by default, and disable swap as well.
Regards,
-Chris0
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