kubernates 1.20.6安装

kubernates 安装

1. 前置要求

• 硬件条件 三台主机 1主2从
• 硬件配置 master 2核4G slave 2核2G

2. 安装

• 访问GitHub 仓库 https://github.com/lework/kainstall
• 运行以下脚本

  bash -c "$(curl -sSL https://cdn.jsdelivr.net/gh/lework/kainstall@master/kainstall-centos.sh)"  
    - init 
    --master 192.168.147.128 
    --worker 192.168.147.132,192.168.147.133 
    --user root 
    --password 123123 
    --port 22 
    --version 1.20.6
             

  经过漫长的等待 ,会有提示信息，然后输入k8s的管理命令确认kubectl cluster-info是否运行正常，如果不成功，查看下面的日志文件进行排坑

  ...
  xzO3coGy8vsFtAkZHLsTiFAWzjYZXKIZZx-cxaZvpYfzO-uNPa3UcFL2aKiqNS0Hr-kjHhFhcMxxH-yWuwodZYn4qzeI1ZIV_-Cg1wte1s3Covb15g
    [ops] etcd backup directory: /var/lib/etcd/backups
  
    See detailed log >>> /tmp/kainstall.t2964vNRW6/kainstall.log
             

3. 安装dashboard

• 1. 前往github https://github.com/kubernetes/dashboard，找到下载说明
  2. 下载

     kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.3.1/aio/deploy/recommended.yaml
                

  3. 查看dashboard是否运行kubectl get pod --namespace=kube-system,如下日志信息

     NAME                                       READY   STATUS      RESTARTS   AGE
     coredns-8496bbfb78-7l9gs                   1/1     Running     1          118m
     coredns-8496bbfb78-r87cr                   1/1     Running     1          118m
     default-http-backend-6946487d9b-rshx5      1/1     Running     1          119m
     etcd-k8s-master-node1                      1/1     Running     1          122m
     etcd-snapshot-1625813807-5s5xf             0/1     Completed   0          118m
     kube-apiserver-k8s-master-node1            1/1     Running     1          122m
     kube-controller-manager-k8s-master-node1   1/1     Running     1          122m
     kube-flannel-ds-9pg5p                      1/1     Running     1          121m
     kube-flannel-ds-whbxz                      1/1     Running     1          121m
     kube-flannel-ds-xxggv                      1/1     Running     1          121m
     kube-proxy-cpnnx                           1/1     Running     1          121m
     kube-proxy-fv62v                           1/1     Running     1          121m
     kube-proxy-t29xk                           1/1     Running     1          121m
     kube-scheduler-k8s-master-node1            1/1     Running     1          122m
     metrics-server-998c79b89-qzsmj             0/1     Running     1          120m
                

  4. 启动代理kubectl proxy
  5. 在本地进行ssh正向代理,记得配置免密

     ssh -L localhost:8001:localhost:8001 -NT [email protected]
                

  6. 访问网页出现如下内容,说明服务启动完成

4. 创建dashboard用户

1. 创建用户

   kubectl create serviceaccount dashboard-admin -n kube-system
              

2. 授权 (绑定用户为集群管理用户)

   kubectl create clusterrolebinding dashboard-cluster-admin --clusterrole=cluster-admin --serviceaccount=kube-system:dashboard-admin
              

3. 查看token

   kubectl describe -n=kube-system  secret dashboard-admin-token-qqrjx
              

   • 详细信息，复制token

   Name:         dashboard-admin-token-qqrjx
   Namespace:    kube-system
   Labels:       <none>
   Annotations:  kubernetes.io/service-account.name: dashboard-admin
                 kubernetes.io/service-account.uid: e3b577a7-fd60-4705-bfe9-df87d88b97f5
   
   Type:  kubernetes.io/service-account-token
   Data
   ====
   ca.crt:     1066 bytes
   namespace:  11 bytes
   token:      eyJhbGciOiJSUzI1NiIsImtpZCI6InhiLTVQTjBLVHRkd24zNkd5QWVXWXNZaUI0M0FyVkZBNWI4S0pXRWZta2MifQ.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.IrVjifmz2Ka0utLv17jKxdtGXG2A6XvmqIO9tcLwTSmYcsnnsUYdKDV-nKzQt7RZZmsbdangCxHOSFNN-bFVyzltHgmnCji4ViJgsgG1ATw7GAAoZBcydm-1sf9XUoQvvXJ7pX-sthpXbPjAItzfoNw5I6Re4DniuhAqsMxjqiOCkreFhV-vc0uww88InPlrfuvYesonj_L0hJnrZJOZbJ7r1QPrery3x9PfGP7F19OMTUfe_iPIu_GFhED8u6aN8OR_uhDSE_EII1zQuLWYV6ksuaxG5s-RNfmJqLfG-HnEwJheJZ_63ceA-j4N4imZ_nNozUAC732ec4_MGIYgLA
              

5. 总结

1. k8s的部署难度真不是一般的高,踩坑挺多的
2. 感谢有一键部署工具，少了很多弯路，前期调研部署工具花了较多时间，官方提供的ansible playbook 安装 会遇到网络问题。
3. master节点一定要4g内存，之前用2g内存会挂掉

6.参考资料

1. https://github.com/kubernetes/dashboard
2. https://kubernetes.io/zh/docs/tasks/access-application-cluster/web-ui-dashboard/
3. https://github.com/kubernetes/dashboard