Kubernetes 1.24 1.25 集群应用docker作为容器
背景
在新版本Kubernetes环境（1.24以及以上版本）下官网不在反对docker作为容器运行时了，若要持续应用docker 须要对docker进行配置一番。须要装置cri-docker作为Kubernetes容器
查看以后容器运行时
# 查看指定节点容器运行时kubectl describe node k8s-node05 | grep Container Container Runtime Version: containerd://1.6.8# 查看所有节点容器运行时kubectl describe node | grep Container Container Runtime Version: containerd://1.6.8 Container Runtime Version: containerd://1.6.8 Container Runtime Version: containerd://1.6.8 Container Runtime Version: containerd://1.6.8 Container Runtime Version: containerd://1.6.8 Container Runtime Version: containerd://1.6.8 Container Runtime Version: containerd://1.6.8 Container Runtime Version: containerd://1.6.8装置docker
# 更新源信息yum update# 装置必要软件yum install -y yum-utils device-mapper-persistent-data lvm2# 写入docker源信息sudo yum-config-manager \ --add-repo \ https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/centos/docker-ce.repo# 更新源信息并进行装置yum updateyum install docker-ce docker-ce-cli containerd.io# 配置加速器sudo mkdir -p /etc/dockersudo tee /etc/docker/daemon.json <<-'EOF'{ "registry-mirrors": ["https://ted9wxpi.mirror.aliyuncs.com"], "exec-opts": ["native.cgroupdriver=systemd"]}EOFsudo systemctl daemon-reloadsudo systemctl restart docker装置cri-docker
# 因为1.24以及更高版本不反对docker所以装置cri-docker# 下载cri-docker wget https://ghproxy.com/https://github.com/Mirantis/cri-dockerd/releases/download/v0.2.5/cri-dockerd-0.2.5.amd64.tgz# 解压cri-dockertar xvf cri-dockerd-0.2.5.amd64.tgz cp cri-dockerd/cri-dockerd /usr/bin/# 写入启动配置文件cat > /usr/lib/systemd/system/cri-docker.service <<EOF[Unit]Description=CRI Interface for Docker Application Container EngineDocumentation=https://docs.mirantis.comAfter=network-online.target firewalld.service docker.serviceWants=network-online.targetRequires=cri-docker.socket[Service]Type=notifyExecStart=/usr/bin/cri-dockerd --network-plugin=cni --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.7ExecReload=/bin/kill -s HUP $MAINPIDTimeoutSec=0RestartSec=2Restart=alwaysStartLimitBurst=3StartLimitInterval=60sLimitNOFILE=infinityLimitNPROC=infinityLimitCORE=infinityTasksMax=infinityDelegate=yesKillMode=process[Install]WantedBy=multi-user.targetEOF# 写入socket配置文件cat > /usr/lib/systemd/system/cri-docker.socket <<EOF[Unit]Description=CRI Docker Socket for the APIPartOf=cri-docker.service[Socket]ListenStream=%t/cri-dockerd.sockSocketMode=0660SocketUser=rootSocketGroup=docker[Install]WantedBy=sockets.targetEOF# 进行启动cri-dockersystemctl daemon-reload ; systemctl enable cri-docker --now为kubelet配置容器运行时
# 1.25 版本下 所有k8s节点配置kubelet servicecat > /usr/lib/systemd/system/kubelet.service << EOF[Unit]Description=Kubernetes KubeletDocumentation=https://github.com/kubernetes/kubernetesAfter=containerd.serviceRequires=containerd.service[Service]ExecStart=/usr/local/bin/kubelet \\ --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig \\ --kubeconfig=/etc/kubernetes/kubelet.kubeconfig \\ --config=/etc/kubernetes/kubelet-conf.yml \\ --container-runtime-endpoint=unix:///run/cri-dockerd.sock \\ --node-labels=node.kubernetes.io/node=[Install]WantedBy=multi-user.targetEOF# 1.24 版本下 所有k8s节点配置kubelet servicecat > /usr/lib/systemd/system/kubelet.service << EOF[Unit]Description=Kubernetes KubeletDocumentation=https://github.com/kubernetes/kubernetesAfter=containerd.serviceRequires=containerd.service[Service]ExecStart=/usr/local/bin/kubelet \\ --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig \\ --kubeconfig=/etc/kubernetes/kubelet.kubeconfig \\ --config=/etc/kubernetes/kubelet-conf.yml \\ --container-runtime=remote \\ --runtime-request-timeout=15m \\ --container-runtime-endpoint=unix:///run/cri-dockerd.sock \\ --cgroup-driver=systemd \\ --node-labels=node.kubernetes.io/node= \\ --feature-gates=IPv6DualStack=true[Install]WantedBy=multi-user.targetEOF# 重启systemctl daemon-reloadsystemctl restart kubeletsystemctl enable --now kubelet验证
# 查看指定节点容器运行时kubectl describe node k8s-node05 | grep Container Container Runtime Version: docker://20.10.17# 查看所有节点容器运行时kubectl describe node | grep Container Container Runtime Version: containerd://1.6.8 Container Runtime Version: containerd://1.6.8 Container Runtime Version: containerd://1.6.8 Container Runtime Version: containerd://1.6.8 Container Runtime Version: containerd://1.6.8 Container Runtime Version: containerd://1.6.8 Container Runtime Version: containerd://1.6.8 Container Runtime Version: docker://20.10.17对于
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