11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.108952 974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.209293 974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.310543 974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.411121 974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.511949 974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.612822 974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.713249 974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.781263 974 controller.go:144] failed to ensure lease exists, will retry in 7s, error: leases.coordination.k8s.io "localhost.localdomain" is forbidden: User "system:node:k8s222" cannot get resource "leases" in API group "coordination.k8s.io" in the namespace "kube-node-lease": can only access node lease with the same name as the requesting node
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.813355 974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"
11月 05 10:58:35 localhost.localdomain kubelet[974]: E1105 10:58:35.913495 974 kubelet.go:2412] "Error getting node" err="node "localhost.localdomain" not found"
1.1 该节点一直NotReady
[root@crust-m01 ~]# kubectl get node
NAME STATUS ROLES AGE VERSION
k8s220 NotReady control-plane,master 44d v1.21.3
k8s221 NotReady <none> 44d v1.21.3
k8s222 NotReady <none> 44d v1.21.3
1.2 查看该节点详细信息
[root@localhost ~]# kubectl describe node k8s221
……
Unschedulable: false
Lease:
HolderIdentity: k8s221
AcquireTime: <unset>
RenewTime: Tue, 28 Sep 2021 14:37:08 +0800
Conditions:
Type Status LastHeartbeatTime LastTransitionTime Reason Message
---- ------ ----------------- ------------------ ------ -------
MemoryPressure Unknown Tue, 28 Sep 2021 14:32:16 +0800 Tue, 28 Sep 2021 14:38:17 +0800 NodeStatusUnknown Kubelet stopped posting node status.
DiskPressure Unknown Tue, 28 Sep 2021 14:32:16 +0800 Tue, 28 Sep 2021 14:38:17 +0800 NodeStatusUnknown Kubelet stopped posting node status.
PIDPressure Unknown Tue, 28 Sep 2021 14:32:16 +0800 Tue, 28 Sep 2021 14:38:17 +0800 NodeStatusUnknown Kubelet stopped posting node status.
Ready Unknown Tue, 28 Sep 2021 14:32:16 +0800 Tue, 28 Sep 2021 14:38:17 +0800 NodeStatusUnknown Kubelet stopped posting node status.
……
1.3 该节点上查看kubelet日志
[root@crust-m2 ~]# service kubelet status -l
Redirecting to /bin/systemctl status -l kubelet.service
● kubelet.service - kubelet: The Kubernetes Node Agent
Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled)
Drop-In: /usr/lib/systemd/system/kubelet.service.d
└─10-kubeadm.conf
Active: active (running) since 二 2021-09-28 14:51:57 CST; 4min 6s ago
Docs: https://kubernetes.io/docs/
Main PID: 21165 (kubelet)
Tasks: 19
Memory: 43.0M
CGroup: /system.slice/kubelet.service
└─21165 /usr/bin/kubelet --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf --config=/var/lib/kubelet/config.yaml --network-plugin=cni --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.4.1
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.119645 21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.220694 21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.321635 21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.385100 21165 eviction_manager.go:255] "Eviction manager: failed to get summary stats" err="failed to get node info: node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.422387 21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.523341 21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.624021 21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.724418 21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.825475 21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"
9月 28 14:56:03 crust-m2 kubelet[21165]: E0928 14:56:03.926199 21165 kubelet.go:2291] "Error getting node" err="node "crust-m2" not found"
2. 【排错】
-
1.3中日志输出的启动命令如下
/usr/bin/kubelet --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf --config=/var/lib/kubelet/config.yaml --network-plugin=cni --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.4.1
查看并分析启动命令中所有配置文件都没有问题
-
发现1.3 中输出的错误
err="node "localhost.localdomain" not found
而master上kubectl get node的信息 三个node是k8s220，k8s221，k8s222 -
结论
之前安装kubernetes的时候，master的名字是k8s220，node是k8s221，k8s222，因为/etc/hostname中默认写成了localhost.localdomain，因此kubelet一直报错
3. 【修改】
- 修改hostname文件，并执行hostname命令修改服务器名称
- 重启kubelete
原文地址：https://blog.csdn.net/m0_60721514/article/details/123192723
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