kubeadm升级kubernetes HA版本

以你之姓@ 2022-03-01 01:52 187阅读 0赞

# kubeadm升级kubernetes HA版本 #

### 文章目录 ###

*  kubeadm升级kubernetes HA版本
 *   *  1. 版本说明
     *  2. 操作说明
     *   *  2.1 master节点升级
         *  2.2 node节点升级

## 1. 版本说明 ##

文档适用`v1.12.x`升级到`v1.13.y`或者`1.13.x`升级到`v1.13.y`

## 2. 操作说明 ##

### 2.1 master节点升级 ###

**第一台master节点**

# 首先升级kubeadm
    yum upgrade -y kubeadm --disableexcludes=kubernetes
    kubeadm version
    kubeadm upgrade plan
    
    node=master1    
    kubectl drain $node --ignore-daemonsets    
    cd /etc/kubernetes/    
    kubectl -n kube-system get cm kubeadm-config -oyaml > kubeadm-config.yaml    
    # 删除etcd相关配置，添加所有的apiEndpoints
    kubectl edit configmap -n kube-system kubeadm-config
    
    kubeadm upgrade apply v1.13.4    
    \mv /etc/sysconfig/kubelet /tmp/
    yum upgrade -y kubelet kubeadm kubectl --disableexcludes=kubernetes
    kubeadm upgrade node config --kubelet-version $(kubelet --version | cut -d ' ' -f 2)
    \mv /tmp/kubelet /etc/sysconfig/
    systemctl daemon-reload
    systemctl restart kubelet
    systemctl status kubelet
    # 以下步骤若执行失败，可以其它master节点操作
    kubectl uncordon $node
    kubectl get nodes

**其它master节点**

# 上面操作中以下命令作相应替换
    ## kubeadm upgrade apply v1.13.4
    kubeadm upgrade node experimental-control-plane

一台一台master升级成功后，依次升级。

### 2.2 node节点升级 ###

在master上操作：  
禁止调度POD

node=node4
    kubectl drain $node --ignore-daemonsets

在节点上操作：  
升级命令工具和重启kubelet。

\mv /etc/sysconfig/kubelet /tmp/
    yum upgrade -y kubelet kubeadm --disableexcludes=kubernetes
    kubeadm upgrade node config --kubelet-version $(kubelet --version | cut -d ' ' -f 2)
    \mv /tmp/kubelet /etc/sysconfig/
    systemctl daemon-reload
    systemctl restart kubelet
    systemctl status kubelet

在master上操作：  
开启POD调度

node=node4
    kubectl uncordon $node
    kubectl get nodes

一台一台node升级成功后，依次升级。

参考资料：  
\[1\] [https://kubernetes.io/docs/tasks/administer-cluster/kubeadm/kubeadm-upgrade-ha-1-13/][https_kubernetes.io_docs_tasks_administer-cluster_kubeadm_kubeadm-upgrade-ha-1-13]  
\[2\] [https://kubernetes.io/docs/tasks/administer-cluster/kubeadm/kubeadm-upgrade-1-13/][https_kubernetes.io_docs_tasks_administer-cluster_kubeadm_kubeadm-upgrade-1-13]

[https_kubernetes.io_docs_tasks_administer-cluster_kubeadm_kubeadm-upgrade-ha-1-13]: https://kubernetes.io/docs/tasks/administer-cluster/kubeadm/kubeadm-upgrade-ha-1-13/
[https_kubernetes.io_docs_tasks_administer-cluster_kubeadm_kubeadm-upgrade-1-13]: https://kubernetes.io/docs/tasks/administer-cluster/kubeadm/kubeadm-upgrade-1-13/