141 lines
3.4 KiB
Markdown
141 lines
3.4 KiB
Markdown
---
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vssueId: 92
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description: Kubernete安装文档_使用kubeadm升级kubernetes集群
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---
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# Kubernetes从1.15.x升级到 1.15.4
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参考文档： kubernetes 官网文档 [kubeadm upgrade](https://kubernetes.io/docs/reference/setup-tools/kubeadm/kubeadm-upgrade/)
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## 前提条件
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* 您使用 kubeadm 安装了 kubernetes v1.15.0 / v1.15.1 / v1.15.2 / v1.15.3 集群
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* 您想要将其升级到最新的版本 kubernetes v1.15.4
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::: tip
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www.kuboard.cn 是一款免费的基于 Kubernetes 的微服务管理界面，目前只能提供 kubernetes v1.15.0 / v1.15.1 / v1.15.2 / v1.15.3 到 kubernetes v1.15.4 的升级文档，其他版本的集群，请参考 kubernetes 官网文档 [kubeadm upgrade](https://kubernetes.io/docs/reference/setup-tools/kubeadm/kubeadm-upgrade/)
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:::
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## 升级 kubeadm/kubelet/kubectl
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在所有节点（包括 master、worker 节点）执行命令
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``` sh
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# 在所有节点执行（包括 master 和 worker 节点）
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yum install -y kubelet-1.15.4 kubeadm-1.15.4 kubectl-1.15.4
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systemctl daemon-reload
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systemctl restart kubelet
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```
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## 查看集群配置
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在第一个 master 节点执行命令
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``` sh
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# 只在第一个 master 节点执行
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kubeadm config view
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```
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输入结果如下所示：（根据集群配置不一样，您的结果可能不同）
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``` yaml {15,17}
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apiServer:
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extraArgs:
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authorization-mode: Node,RBAC
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timeoutForControlPlane: 4m0s
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apiVersion: kubeadm.k8s.io/v1beta2
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certificatesDir: /etc/kubernetes/pki
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clusterName: kubernetes
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controlPlaneEndpoint: apiserver.demo:6443
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controllerManager: {}
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dns:
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type: CoreDNS
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etcd:
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local:
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dataDir: /var/lib/etcd
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imageRepository: k8s.gcr.io
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kind: ClusterConfiguration
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kubernetesVersion: v1.15.0
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networking:
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dnsDomain: cluster.local
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serviceSubnet: 10.96.0.0/12
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scheduler: {}
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```
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## 创建升级用的配置文件
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**创建文件 kubeadm-config-upgrade.yaml**
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文件内容如下所示，根据前面 `kubeadm config view` 的执行结果，修改了如下字段：
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* imageRepository 的值修改为：registry.cn-hangzhou.aliyuncs.com/google_containers
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* kubernetesVersion 的值修改为： v1.15.4
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``` yaml {15,17}
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apiServer:
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extraArgs:
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authorization-mode: Node,RBAC
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timeoutForControlPlane: 4m0s
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apiVersion: kubeadm.k8s.io/v1beta2
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certificatesDir: /etc/kubernetes/pki
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clusterName: kubernetes
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controlPlaneEndpoint: apiserver.demo:6443
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controllerManager: {}
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dns:
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type: CoreDNS
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etcd:
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local:
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dataDir: /var/lib/etcd
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imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers
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kind: ClusterConfiguration
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kubernetesVersion: v1.15.4
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networking:
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dnsDomain: cluster.local
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serviceSubnet: 10.96.0.0/12
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scheduler: {}
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```
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## 执行 kubeadm upgrade 命令
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在第一个 master 节点上执行：
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查看升级后的变化
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``` sh
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# 只在第一个 master 节点执行
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kubeadm upgrade diff --config kubeadm-config-upgrade.yaml
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```
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执行升级 dry-run
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``` sh
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# 只在第一个 master 节点执行
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kubeadm upgrade apply --config kubeadm-config-upgrade.yaml --dry-run
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```
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执行升级动作
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``` sh
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# 只在第一个 master 节点执行
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kubeadm upgrade apply --config kubeadm-config-upgrade.yaml
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```
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## 升级 worker 节点
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针对所有的 worker 节点，执行
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``` sh
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# 只在 worker 节点执行（所有的 worker 节点）
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kubeadm upgrade node
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```
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## 检查升级结果
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在第一个 master 节点执行
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``` sh
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# 只在第一个 master 节点执行
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kubectl get nodes -o wide
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kubectl version
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kubeadm config view
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```
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