升级CentOS上的Kubernetes(k8s)部署是一个需要谨慎操作的过程,以确保集群的稳定性和数据的安全性。以下是一个基本的升级步骤指南:
备份数据:
/var/lib/etcd/
。/etc/kubernetes/
。检查集群状态:
kubectl get nodes
确保所有节点状态正常,所有Pod都在运行状态。查看当前版本:
kubectl get node
wget https://dl.k8s.io/release/$(kubeadm version | base64 | tr -d '
') -O /usr/local/bin/kubeadm chmod +x /usr/local/bin/kubeadm
2. **验证kubeadm版本**:
```bash
kubeadm version
检查升级计划:
kubeadm upgrade plan
升级控制平面组件:
kubeadm upgrade apply v1.23.17
(请根据实际情况替换为目标版本号)
升级kubelet和kubectl:
wget https://dl.k8s.io/release/$(kubeadm version | base64 | tr -d '
') -O /usr/local/bin/kubelet chmod +x /usr/local/bin/kubelet
wget https://dl.k8s.io/release/$(kubeadm version | base64 | tr -d ’ ') -O /usr/local/bin/kubectl chmod +x /usr/local/bin/kubectl
6. **重启kubelet服务**:
```bash
sudo systemctl daemon-reload
sudo systemctl restart kubelet
kubectl uncordon k8s-master
wget https://dl.k8s.io/release/$(kubeadm version | base64 | tr -d '
') -O /usr/local/bin/kubeadm chmod +x /usr/local/bin/kubeadm
2. **腾空工作节点**:
```bash
kubectl drain k8s-node1 --ignore-daemonsets
wget https://dl.k8s.io/release/$(kubeadm version | base64 | tr -d '
') -O /usr/local/bin/kubelet chmod +x /usr/local/bin/kubelet
wget https://dl.k8s.io/release/$(kubeadm version | base64 | tr -d ’ ') -O /usr/local/bin/kubectl chmod +x /usr/local/bin/kubectl
4. **重启kubelet服务**:
```bash
sudo systemctl daemon-reload
sudo systemctl restart kubelet
kubectl uncordon k8s-node1
检查集群状态:
kubectl get nodes
验证各个组件的版本:
kubectl get cs
kubectl get pods --all-namespaces
以上步骤是一个基本的升级流程,具体操作可能会因集群规模和环境差异而有所不同。建议参考Kubernetes官方文档进行详细操作。