117 lines
3.5 KiB
Markdown
117 lines
3.5 KiB
Markdown
---
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vssueId: 141
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description: Kubernetes升级1.16.x。本文描述了如何从 Kubernetes 网络插件 calico 3.8.x 升级到 3.9。执行命令 kubectl describe deployment calico-kube-controllers -n kube-system 确认当前 calico 版本
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meta:
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- name: keywords
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content: Kubernetes升级,K8S升级,升级calico
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---
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# 升级网络插件calico
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<AdSenseTitle/>
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::: danger
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升级 calico 时，集群内部网络会不可用，请选择合适的时间升级
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:::
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## 确认当前版本
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执行以下命令确认当前 calico 版本
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``` sh
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kubectl describe deployment calico-kube-controllers -n kube-system
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```
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输出结果如下所示：
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``` yaml {18}
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Name: calico-kube-controllers
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Namespace: kube-system
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CreationTimestamp: Tue, 20 Aug 2019 06:38:17 +0800
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Labels: k8s-app=calico-kube-controllers
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Annotations: deployment.kubernetes.io/revision: 1
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kubectl.kubernetes.io/last-applied-configuration:
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{"apiVersion":"apps/v1","kind":"Deployment","metadata":{"annotations":{},"labels":{"k8s-app":"calico-kube-controllers"},"name":"calico-kub...
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Selector: k8s-app=calico-kube-controllers
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Replicas: 1 desired | 1 updated | 1 total | 1 available | 0 unavailable
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StrategyType: Recreate
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MinReadySeconds: 0
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Pod Template:
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Labels: k8s-app=calico-kube-controllers
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Annotations: scheduler.alpha.kubernetes.io/critical-pod:
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Service Account: calico-kube-controllers
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Containers:
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calico-kube-controllers:
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Image: calico/kube-controllers:v3.8.2
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Port: <none>
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Host Port: <none>
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Readiness: exec [/usr/bin/check-status -r] delay=0s timeout=1s period=10s #success=1 #failure=3
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Environment:
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ENABLED_CONTROLLERS: node
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DATASTORE_TYPE: kubernetes
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Mounts: <none>
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Volumes: <none>
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```
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## 清理已有安装
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如上所示，calico镜像是 v3.8.2，要清理已有 calico 安装，执行命令：
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``` sh
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# 如果版本号是 v3.8.2 或者 v3.8.x，则删除命令如下
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kubectl delete -f https://kuboard.cn/install-script/calico/calico-3.8.yaml
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```
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## 安装新版本
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执行命令查看kubeadmin的配置
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```sh
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kubeadm config view
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```
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输出结果如下所示：
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``` yaml {21}
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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: v1.16.0
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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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podSubnet: 10.100.0.1/16
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scheduler: {}
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```
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执行以下命令，安装 calico 3.9，请注意，下面的 POD_SUBNET 环境变量来自于上面的输出结果：（输出结果中，podSubnet字段可能为空，这说明集群安装集群时使用了默认的配置，升级时，请仍然保留空值。）
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``` sh {2}
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# 命令行中环境变量 POD_SUBNET 的取值 10.100.0.1/16 来自于上一个命令的输出结果
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export POD_SUBNET=10.100.0.1/16
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rm -f calico-3.9.2.yaml
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wget https://kuboard.cn/install-script/calico/calico-3.9.2.yaml
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sed -i "s#192\.168\.0\.0/16#${POD_SUBNET}#" calico-3.9.2.yaml
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kubectl apply -f calico-3.9.2.yaml
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```
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此时可执行命令检查 calico 的版本：
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``` sh
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kubectl describe deployment calico-kube-controllers -n kube-system
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```
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:tada: :tada: :tada:
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