kubelet证书过期[已解决]

半兽人 发表于: 2019-11-07   最后更新时间: 2020-03-22 22:06:48  
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巡检时发现一些节点报以下错误,发现证书过期

kubelet: I1107 11:23:12.857909   23311 bootstrap.go:239] Failed to connect to apiserver: the server has asked for the client to provide credentials

1、删除过期节点的kubelet证书

rm -f /etc/kubernetes/kubelet.kubeconfig
rm -f /etc/kubernetes/cert/kubelet.*
rm -rf /etc/kubernetes/kubelet-bootstrap.kubeconfig

2、创建bootstrap:

# 要过期的kubelet节点
export NODE_NAMES=(kube-node5)
for node_name in ${NODE_NAMES[@]}
  do
    echo ">>> ${node_name}"

    # 创建 token
    export BOOTSTRAP_TOKEN=$(kubeadm token create \
      --description kubelet-bootstrap-token \
      --groups system:bootstrappers:${node_name} \
      --kubeconfig ~/.kube/config)

    # 设置集群参数
    kubectl config set-cluster kubernetes \
      --certificate-authority=/etc/kubernetes/cert/ca.pem \
      --embed-certs=true \
      --server=${KUBE_APISERVER} \
      --kubeconfig=kubelet-bootstrap-${node_name}.kubeconfig

    # 设置客户端认证参数
    kubectl config set-credentials kubelet-bootstrap \
      --token=${BOOTSTRAP_TOKEN} \
      --kubeconfig=kubelet-bootstrap-${node_name}.kubeconfig

    # 设置上下文参数
    kubectl config set-context default \
      --cluster=kubernetes \
      --user=kubelet-bootstrap \
      --kubeconfig=kubelet-bootstrap-${node_name}.kubeconfig

    # 设置默认上下文
    kubectl config use-context default --kubeconfig=kubelet-bootstrap-${node_name}.kubeconfig
  done

3、查看 kubeadm 为各节点创建的 token:

kubeadm token list --kubeconfig ~/.kube/config

4、将bootstrap分发到要过期的节点上

export NODE_NAMES=(kube-node5)
for node_name in ${NODE_NAMES[@]}
  do
    echo ">>> ${node_name}"
    scp kubelet-bootstrap-${node_name}.kubeconfig k8s@${node_name}:/etc/kubernetes/kubelet-bootstrap.kubeconfig
  done

5、重新启动kubelet

systemctl restart kubelet
systemctl status kubelet
更新于 2020-03-22

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