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  • K8S中POD节点状态ContainerCreating原因排查

    现象:

    # kubectl get pods -n kube-system |grep dashboard
    kubernetes-dashboard-6685cb584f-dqkwk   0/1     ContainerCreating   0          13m
    

    状态一直是ContainerCreating。

    查看pod日志:

    # kubectl describe pod kubernetes-dashboard-6685cb584f-dqkwk --namespace=kube-system
    ...
     Warning  FailedCreatePodSandBox  13m                     kubelet, k8s-220   Failed create pod sandbox: rpc error: code = Unknown desc = failed to set up sandbox container "fe44dea0870b79dbf2ae7d6de0eff1583c8ba99566775e70bfc44ca2088a74ce" network for pod "kubernetes-dashboard-6685cb584f-dqkwk": NetworkPlugin cni failed to set up pod "kubernetes-dashboard-6685cb584f-dqkwk_kube-system" network: failed to set bridge addr: "cni0" already has an IP address different from 10.244.2.1/24
    ...
    

    可以看到是网络问题。

    原因是node之前反复添加过,添加之前需要清除下网络
    node上执行:

    # kubeadm reset
    # systemctl stop kubelet
    # systemctl stop docker
    # rm -rf /var/lib/cni/ /var/lib/kubelet/* /etc/cni/
    # ifconfig cni0 down
    # ifconfig flannel.1 down
    # ifconfig docker0 down
    # ip link delete cni0
    # ip link delete flannel.1
    # systemctl start docker
    # # kubeadm join xxx
    

    重新加入后问题即可解决。

    # kubectl get pods -n kube-system |grep dashboard
    kubernetes-dashboard-6685cb584f-dqkwk   1/1     Running   0          14m
    

    可以看到状态变为了Running。

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  • 原文地址:https://www.cnblogs.com/aresxin/p/K8S-issue1.html
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