修改NODE节点的cri-socket
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kubectl edit nodes d0-dev-master002 修改 kubeadm.alpha.kubernetes.io/cri-socket: /var/run/dockershim.sock 改为 kubeadm.alpha.kubernetes.io/cri-socket: /var/run/containerd/containerd.sock |
在主节点上驱逐节点pod并标记为不可调度，这里需要等待一些容器调度完成
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kubectl drain d0-dev-master002 --ignore-daemonsets |
登到d0-dev-master002卸载Docker
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#停掉Docker相关 systemctl stop kubelet systemctl disable docker --now systemctl disable docker.socket --now yum remove docker-ce docker-ce-cli -y |
安装containerd
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yum install -y yum-utils device-mapper-persistent-data lvm2 containerd
containerd config default > /etc/containerd/config.toml
sed -i s#'registry.k8s.io'#'registry.cn-hangzhou.aliyuncs.com/google_containers'#g /etc/containerd/config.toml
sed -i s#'SystemdCgroup = false'#'SystemdCgroup = true'#g /etc/containerd/config.toml
sed -i '/mirrors/ {
a \ \ \ \ \ \ \ \ [plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]
a \ \ \ \ \ \ \ \ \ \ endpoint = ["http://hub-mirror.c.163.com","https://docker.mirrors.ustc.edu.cn","https://registry.docker-cn.com"]
}' /etc/containerd/config.toml
echo 'KUBELET_EXTRA_ARGS="--container-runtime=remote --container-runtime-endpoint=unix:///run/containerd/containerd.sock"' >>/etc/sysconfig/kubelet |
启动kubelt，这中间kubelet可能会重启几次，耐心等待
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systemctl daemon-reload systemctl enable --now containerd && systemctl status containerd systemctl restart kubelet && systemctl status kubelet |
可通过如下命令查看集群状态
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kubectl get events --all-namespaces --sort-by='.metadata.creationTimestamp' |
重启机器立马ready了
恢复调度
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kubectl uncordon d0-dev-master002 |
安装相关容器工具
crictl是k8s默认工具
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echo 'runtime-endpoint: unix:///var/run/containerd/containerd.sock image-endpoint: unix:///var/run/containerd/containerd.sock debug: false pull-image-on-create: false disable-pull-on-run: false' >/etc/crictl.yaml crictl pods crictl pods --name kube-proxy-dnljx crictl images |
但是习惯docker命令的建议可以使用nerdctl
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cd /tmp wget http://1.116.235.157:1080/software/nerdctl-1.6.0-linux-amd64.tar.gz tar zxvf nerdctl-1.6.0-linux-amd64.tar.gz cp nerdctl /usr/local/sbin nerdctl -n k8s.io ps nerdctl -n k8s.io images echo 'source <(nerdctl completion bash)' >> /etc/profile source /etc/profile |
如果需要用nerdctl构建的话需要完整版的