（五)从零开始搭建k8s集群—— 使用KubeKey一键式搭建高可用k8s集群及kubesphere管理平台

前言

KubeKey是go语言开发的一款云原生容器构建工具，使用 KubeKe可以轻松、高效、灵活地单独或整体安装 Kubernetes 和 KubeSphere。本节我们使用KubeKey一键式部署一个k8s集群及k8s管理平台KubeSphere。

正文

①准备三台centos服务器，内核版本4.15 or later，服务器配置：2核虚拟CPU，4 GB 内存，30GB存储。

服务器配置

name	ip
m1	192.168.23.131
m2	192.168.23.132
m3	192.168.23.133

②安装k8s环境依赖，在每台服务器执行以下命令

命令：yum install -y socat conntrack ebtables ipset

③下载KubeKey工具

//导入环境变量
export KKZONE=cn
//下载kubekey
curl -sfL https://get-kk.kubesphere.io | sh -

 ④ 使用KubeKey生成一个k8s集群以及KubeSphere集群管理平台启动文件模板k8s.yaml

命令：./kk create config --with-kubesphere v3.1.0 -f k8s.yaml

⑤ 修改k8s集群以及KubeSphere集群管理平台启动文件模板 k8s.yaml

apiVersion: kubekey.kubesphere.io/v1alpha2
kind: Cluster
metadata:
  name: sample
spec:
  hosts:
  - {name: m1, address: 192.168.23.131, internalAddress: 192.168.23.131, user: root, password: "root"}
  - {name: m2, address: 192.168.23.132, internalAddress: 192.168.23.132, user: root, password: "root"}
  - {name: m3, address: 192.168.23.133, internalAddress: 192.168.23.133, user: root, password: "root"}
  roleGroups:
    etcd:
    - m1
    control-plane: 
    - m1
    worker:
    - m2
    - m3
  controlPlaneEndpoint:
    ## Internal loadbalancer for apiservers 
    internalLoadbalancer: haproxy

    domain: lb.kubesphere.local
    address: ""
    port: 6443
  kubernetes:
    version: v1.21.5
    clusterName: cluster.local
  network:
    plugin: calico
    kubePodsCIDR: 10.233.64.0/18
    kubeServiceCIDR: 10.233.0.0/18
    ## multus support. https://github.com/k8snetworkplumbingwg/multus-cni
    multusCNI:
      enabled: false
  registry:
    plainHTTP: false
    privateRegistry: ""
    namespaceOverride: ""
    registryMirrors: []
    insecureRegistries: []
  addons: []


---
apiVersion: installer.kubesphere.io/v1alpha1
kind: ClusterConfiguration
metadata:
  name: ks-installer
  namespace: kubesphere-system
  labels:
    version: v3.1.0
spec:
  persistence:
    storageClass: ""       
  authentication:
    jwtSecret: ""
  zone: ""
  local_registry: ""        
  etcd:
    monitoring: false      
    endpointIps: localhost  
    port: 2379             
    tlsEnable: true
  common:
    redis:
      enabled: false
    redisVolumSize: 2Gi 
    openldap:
      enabled: false
    openldapVolumeSize: 2Gi  
    minioVolumeSize: 20Gi
    monitoring:
      endpoint: http://prometheus-operated.kubesphere-monitoring-system.svc:9090
    es:  
      elasticsearchMasterVolumeSize: 4Gi   
      elasticsearchDataVolumeSize: 20Gi   
      logMaxAge: 7          
      elkPrefix: logstash
      basicAuth:
        enabled: false
        username: ""
        password: ""
      externalElasticsearchUrl: ""
      externalElasticsearchPort: ""  
  console:
    enableMultiLogin: true 
    port: 30880
  alerting:       
    enabled: false
    # thanosruler:
    #   replicas: 1
    #   resources: {}
  auditing:    
    enabled: false
  devops:           
    enabled: false
    jenkinsMemoryLim: 2Gi     
    jenkinsMemoryReq: 1500Mi 
    jenkinsVolumeSize: 8Gi   
    jenkinsJavaOpts_Xms: 512m  
    jenkinsJavaOpts_Xmx: 512m
    jenkinsJavaOpts_MaxRAM: 2g
  events:          
    enabled: false
    ruler:
      enabled: true
      replicas: 2
  logging:         
    enabled: false
    logsidecar:
      enabled: true
      replicas: 2
  metrics_server:             
    enabled: false
  monitoring:
    storageClass: ""
    prometheusMemoryRequest: 400Mi  
    prometheusVolumeSize: 20Gi  
  multicluster:
    clusterRole: none 
  network:
    networkpolicy:
      enabled: false
    ippool:
      type: none
    topology:
      type: none
  openpitrix:
    store:
      enabled: false
  servicemesh:    
    enabled: false  
  kubeedge:
    enabled: false
    cloudCore:
      nodeSelector: {"node-role.kubernetes.io/worker": ""}
      tolerations: []
      cloudhubPort: "10000"
      cloudhubQuicPort: "10001"
      cloudhubHttpsPort: "10002"
      cloudstreamPort: "10003"
      tunnelPort: "10004"
      cloudHub:
        advertiseAddress: 
          - ""           
        nodeLimit: "100"
      service:
        cloudhubNodePort: "30000"
        cloudhubQuicNodePort: "30001"
        cloudhubHttpsNodePort: "30002"
        cloudstreamNodePort: "30003"
        tunnelNodePort: "30004"
    edgeWatcher:
      nodeSelector: {"node-role.kubernetes.io/worker": ""}
      tolerations: []
      edgeWatcherAgent:
        nodeSelector: {"node-role.kubernetes.io/worker": ""}
        tolerations: []

⑥启动k8s集群以及KubeSphere管理平台 

 命令：./kk create cluster -f k8s.yaml

 ⑦验证

• 安装完成

•  验证k8s集群

•  验证KubeSphere

命令：

kubectl logs -n kubesphere-system $(kubectl get pod -n kubesphere-system -l app=ks-install -o jsonpath='{.items[0].metadata.name}') -f

访问：http://192.168.23.131:30880
账号: admin
密码: P@88w0rd

结语

至此，k8s集群及kubesphere容器管理平台就搭建完成了，关于更多k8s集群及kubesphere容器管理平台分享内容，我们下期见咯。。。