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 \
--master192.168.147.128 \
--worker192.168.147.132,192.168.147.133 \
--user root \
--password123123 \
--port22 \
--version1.20.6

1.  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 -fhttps://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

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

ssh-L localhost:8001:localhost:8001 -NT root@192.168.147.128

• 访问网页出现如下内容,说明服务启动完成

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:    

 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