kubernetes管理工具--kubectl

本是古典何须时尚 2023-08-17 17:13 126阅读 0赞

## 一、kubernetes集群管理工具kubectl命令 ##

![462684-20190821124655027-1874082840.png][]

![462684-20190821124710553-563805866.png][]

## 二、kubectl工具管理集群 ##

1、创建

kubectl run nginx --replicas=3 --image=nginx:1.14 --port=80  
kubectl get deploy,pods  
![462684-20190821130139911-543571964.png][]

部署应用时，先拉取镜像，等待片刻：

![462684-20190821130253732-1723417286.png][]

2、发布

把应用发布到外网：  
kubectl expose deployment nginx --port=80 --type=NodePort --target-port=80 --name=nginx-service  
kubectl get service

![462684-20190821130423311-243653960.png][]

通过38757端口就可以访问应用了。

![462684-20190821130518829-1218564379.png][]

可以看到，应用部署在两台node上。

通过任意一台node的38757端口都可以访问应用。

![462684-20190821130700274-435179189.png][]

3、 更新  
kubectl set image deployment/nginx nginx=nginx:1.15

![462684-20190821130736176-528767267.png][]

![462684-20190821130912755-1582140242.png][]

kubernetes的更新为滚动更新方式，新版本的启动1个，旧版本的杀掉一个，滚动式更新。

4、 回滚  
kubectl rollout history deployment/nginx

![462684-20190821131004677-1696983799.png][]

可以看到，有2个历史版本，我们可以回滚到任意版本。

回滚到版本2

kubectl rollout undo daemonset/nginx --to-revision=2

回滚到上一个版本：  
kubectl rollout undo deployment/nginx

5、 删除  
kubectl delete deploy/nginx  
kubectl delete svc/nginx-service

## 三、kubectl远程连接k8s集群 ##

生成config文件

cat kubeconfig-remote.sh

# 设置集群参数
    kubectl config set-cluster kubernetes \
      --server=https://10.11.97.187:6443 \
      --certificate-authority=./k8s-cert/ca.pem \
      --embed-certs=true \
      --kubeconfig=config
    
    # 设置客户端认证参数
    kubectl config set-credentials cluster-admin \
      --certificate-authority=./k8s-cert/ca.pem  \
      --embed-certs=true \
      --client-key=./k8s-cert/admin-key.pem \
      --client-certificate=./k8s-cert/admin.pem \
      --kubeconfig=config
    
    # 设置上下文参数
    kubectl config set-context default \
      --cluster=kubernetes \
      --user=cluster-admin  \
      --kubeconfig=config
    
    # 设置默认上下文
    kubectl config use-context default --kubeconfig=config

sh kubeconfig-remote.sh

Cluster "kubernetes" set.
    User "cluster-admin" set.
    Context "default" created.
    Switched to context "default".

cat config

apiVersion: v1
    clusters:
    - cluster:
    certificate-authority-data: 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
    server: https://10.11.97.187:6443
    name: kubernetes
    contexts:
    - context:
    cluster: kubernetes
    user: cluster-admin
    name: default
    current-context: default
    kind: Config
    preferences: {}
    users:
    - name: cluster-admin
    user:
    client-certificate-data: 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
    client-key-data: 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

拷贝文件到Node

![462684-20190821133041625-1805118521.png][]

Node节点上测试

[root@k8s-node01 ~]# kubectl --kubeconfig=./config get node
    NAME           STATUS   ROLES    AGE   VERSION
    10.11.97.181   Ready    <none>   26d   v1.12.1
    10.11.97.71    Ready    <none>   26d   v1.12.1

如果不希望在命令行加kubeconfig选项，可以创建一个目录.kube，将config文件放入下面即可。

![462684-20190821133318346-91411469.png][]

这样就可以在Node节点上使用kubectl工具了。

转载于:https://www.cnblogs.com/skyflask/articles/11388088.html

[462684-20190821124655027-1874082840.png]: /images/20230808/dde7ed1b4cf84bbb9bf0da6eaa5fd7ed.png
[462684-20190821124710553-563805866.png]: /images/20230808/c15dafc9a5e64709a7beb1e72cc5e9ed.png
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[462684-20190821130700274-435179189.png]: /images/20230808/93a312b816754602853f1977584f7d0c.png
[462684-20190821130736176-528767267.png]: /images/20230808/8675434bc92642d39519686294aabda7.png
[462684-20190821130912755-1582140242.png]: /images/20230808/3deb52dcbe324074b641e166cf40df7f.png
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[462684-20190821133318346-91411469.png]: /images/20230808/34c632417e604b9face7f1e5051d8211.png