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目录
Kubernetes上安装KubeSphere教程
2023-02-24 12:59:07

该篇集群搭建是在我前两篇博文的基础上搭建的

k8s集群环境搭建
k8s实战 这里主要是装好了NFS

参考官方文档，在Kubernetes上安装：https://kubesphere.io/zh/docs/v3.3/installing-on-kubernetes/introduction/overview/

一、环境准备

1、k8s版本

1-1、官网上说如需在 Kubernetes 上安装 KubeSphere 3.3，您的 Kubernetes 版本必须为：v1.19.x、v1.20.x、v1.21.x、 v1.22.x、 v1.23.x 和 * v1.24.x。带星号的版本可能出现边缘节点部分功能不可用的情况。因此，如需使用边缘节点，推荐安装 v1.21.x 及之前的版本。

我们先看一下自己的版本

  1. [root@k8s-new-master ~]# kubectl version
  2. Client Version: version.Info{Major:"1", Minor:"20", GitVersion:"v1.20.9", GitCommit:"7a576bc3935a6b555e33346fd73ad77c925e9e4a", GitTreeState:"clean", BuildDate:"2021-07-15T21:01:38Z", GoVersion:"go1.15.14", Compiler:"gc", Platform:"linux/amd64"}
  3. Server Version: version.Info{Major:"1", Minor:"20", GitVersion:"v1.20.9", GitCommit:"7a576bc3935a6b555e33346fd73ad77c925e9e4a", GitTreeState:"clean", BuildDate:"2021-07-15T20:56:38Z", GoVersion:"go1.15.14", Compiler:"gc", Platform:"linux/amd64"}

1.20.9是符合上面描述的版本的。

1-2、可用 CPU > 1 核；内存 > 2 G。CPU 必须为 x86_64，暂时不支持 Arm 架构的 CPU。
我的虚拟机配置是2核4G也是符合要求的

1-3、Kubernetes 集群已配置默认 StorageClass（请使用 kubectl get sc 进行确认）。

  1. [root@k8s-new-master ~]# kubectl get sc
  2. No resources found

这个是空的，不符合要求，得先装一下。
直接准备好yaml，用kubectl命令安装即可

  1. ## 创建了一个存储类
  2. apiVersion: storage.k8s.io/v1
  3. kind: StorageClass
  4. metadata:
  5.   name: nfs-storage
  6.   annotations:
  7.     storageclass.kubernetes.io/is-default-class: "true"
  8. provisioner: k8s-sigs.io/nfs-subdir-external-provisioner
  9. parameters:
  10.   archiveOnDelete: "true"  ## 删除pv的时候，pv的内容是否要备份
  12. ---
  13. apiVersion: apps/v1
  14. kind: Deployment
  15. metadata:
  16.   name: nfs-client-provisioner
  17.   labels:
  18.     app: nfs-client-provisioner
  19.   # replace with namespace where provisioner is deployed
  20.   namespace: default
  21. spec:
  22.   replicas: 1
  23.   strategy:
  24.     type: Recreate
  25.   selector:
  26.     matchLabels:
  27.       app: nfs-client-provisioner
  28.   template:
  29.     metadata:
  30.       labels:
  31.         app: nfs-client-provisioner
  32.     spec:
  33.       serviceAccountName: nfs-client-provisioner
  34.       containers:
  35.         - name: nfs-client-provisioner
  36.           image: registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images/nfs-subdir-external-provisioner:v4.0.2
  37.           # resources:
  38.           #    limits:
  39.           #      cpu: 10m
  40.           #    requests:
  41.           #      cpu: 10m
  42.           volumeMounts:
  43.             - name: nfs-client-root
  44.               mountPath: /persistentvolumes
  45.           env:
  46.             - name: PROVISIONER_NAME
  47.               value: k8s-sigs.io/nfs-subdir-external-provisioner
  48.             - name: NFS_SERVER
  49.               value: 192.168.192.8 ## 指定自己nfs服务器地址
  50.             - name: NFS_PATH  
  51.               value: /nfs/data  ## nfs服务器共享的目录
  52.       volumes:
  53.         - name: nfs-client-root
  54.           nfs:
  55.             server: 192.168.192.8 ## 指定自己nfs服务器地址
  56.             path: /nfs/data
  57. ---
  58. apiVersion: v1
  59. kind: ServiceAccount
  60. metadata:
  61.   name: nfs-client-provisioner
  62.   # replace with namespace where provisioner is deployed
  63.   namespace: default
  64. ---
  65. kind: ClusterRole
  66. apiVersion: rbac.authorization.k8s.io/v1
  67. metadata:
  68.   name: nfs-client-provisioner-runner
  69. rules:
  70.   - apiGroups: [""]
  71.     resources: ["nodes"]
  72.     verbs: ["get", "list", "watch"]
  73.   - apiGroups: [""]
  74.     resources: ["persistentvolumes"]
  75.     verbs: ["get", "list", "watch", "create", "delete"]
  76.   - apiGroups: [""]
  77.     resources: ["persistentvolumeclaims"]
  78.     verbs: ["get", "list", "watch", "update"]
  79.   - apiGroups: ["storage.k8s.io"]
  80.     resources: ["storageclasses"]
  81.     verbs: ["get", "list", "watch"]
  82.   - apiGroups: [""]
  83.     resources: ["events"]
  84.     verbs: ["create", "update", "patch"]
  85. ---
  86. kind: ClusterRoleBinding
  87. apiVersion: rbac.authorization.k8s.io/v1
  88. metadata:
  89.   name: run-nfs-client-provisioner
  90. subjects:
  91.   - kind: ServiceAccount
  92.     name: nfs-client-provisioner
  93.     # replace with namespace where provisioner is deployed
  94.     namespace: default
  95. roleRef:
  96.   kind: ClusterRole
  97.   name: nfs-client-provisioner-runner
  98.   apiGroup: rbac.authorization.k8s.io
  99. ---
  100. kind: Role
  101. apiVersion: rbac.authorization.k8s.io/v1
  102. metadata:
  103.   name: leader-locking-nfs-client-provisioner
  104.   # replace with namespace where provisioner is deployed
  105.   namespace: default
  106. rules:
  107.   - apiGroups: [""]
  108.     resources: ["endpoints"]
  109.     verbs: ["get", "list", "watch", "create", "update", "patch"]
  110. ---
  111. kind: RoleBinding
  112. apiVersion: rbac.authorization.k8s.io/v1
  113. metadata:
  114.   name: leader-locking-nfs-client-provisioner
  115.   # replace with namespace where provisioner is deployed
  116.   namespace: default
  117. subjects:
  118.   - kind: ServiceAccount
  119.     name: nfs-client-provisioner
  120.     # replace with namespace where provisioner is deployed
  121.     namespace: default
  122. roleRef:
  123.   kind: Role
  124.   name: leader-locking-nfs-client-provisioner
  125.   apiGroup: rbac.authorization.k8s.io

执行

  1. kubectl apply -f sc.yaml

再查看

  1. root@k8s-new-master ~]# kubectl get sc
  2. NAME                    PROVISIONER                                   RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
  3. nfs-storage (default)   k8s-sigs.io/nfs-subdir-external-provisioner   Delete          Immediate           false                  30s
  4. [root@k8s-new-master ~]#

目前也已经有了，可以进行搭建了。

我们这里最好再安装一个集群监控指标组件

2、metrics-server

集群指标监控组件

  1. apiVersion: v1
  2. kind: ServiceAccount
  3. metadata:
  4.   labels:
  5.     k8s-app: metrics-server
  6.   name: metrics-server
  7.   namespace: kube-system
  8. ---
  9. apiVersion: rbac.authorization.k8s.io/v1
  10. kind: ClusterRole
  11. metadata:
  12.   labels:
  13.     k8s-app: metrics-server
  14.     rbac.authorization.k8s.io/aggregate-to-admin: "true"
  15.     rbac.authorization.k8s.io/aggregate-to-edit: "true"
  16.     rbac.authorization.k8s.io/aggregate-to-view: "true"
  17.   name: system:aggregated-metrics-reader
  18. rules:
  19. - apiGroups:
  20.   - metrics.k8s.io
  21.   resources:
  22.   - pods
  23.   - nodes
  24.   verbs:
  25.   - get
  26.   - list
  27.   - watch
  28. ---
  29. apiVersion: rbac.authorization.k8s.io/v1
  30. kind: ClusterRole
  31. metadata:
  32.   labels:
  33.     k8s-app: metrics-server
  34.   name: system:metrics-server
  35. rules:
  36. - apiGroups:
  37.   - ""
  38.   resources:
  39.   - pods
  40.   - nodes
  41.   - nodes/stats
  42.   - namespaces
  43.   - configmaps
  44.   verbs:
  45.   - get
  46.   - list
  47.   - watch
  48. ---
  49. apiVersion: rbac.authorization.k8s.io/v1
  50. kind: RoleBinding
  51. metadata:
  52.   labels:
  53.     k8s-app: metrics-server
  54.   name: metrics-server-auth-reader
  55.   namespace: kube-system
  56. roleRef:
  57.   apiGroup: rbac.authorization.k8s.io
  58.   kind: Role
  59.   name: extension-apiserver-authentication-reader
  60. subjects:
  61. - kind: ServiceAccount
  62.   name: metrics-server
  63.   namespace: kube-system
  64. ---
  65. apiVersion: rbac.authorization.k8s.io/v1
  66. kind: ClusterRoleBinding
  67. metadata:
  68.   labels:
  69.     k8s-app: metrics-server
  70.   name: metrics-server:system:auth-delegator
  71. roleRef:
  72.   apiGroup: rbac.authorization.k8s.io
  73.   kind: ClusterRole
  74.   name: system:auth-delegator
  75. subjects:
  76. - kind: ServiceAccount
  77.   name: metrics-server
  78.   namespace: kube-system
  79. ---
  80. apiVersion: rbac.authorization.k8s.io/v1
  81. kind: ClusterRoleBinding
  82. metadata:
  83.   labels:
  84.     k8s-app: metrics-server
  85.   name: system:metrics-server
  86. roleRef:
  87.   apiGroup: rbac.authorization.k8s.io
  88.   kind: ClusterRole
  89.   name: system:metrics-server
  90. subjects:
  91. - kind: ServiceAccount
  92.   name: metrics-server
  93.   namespace: kube-system
  94. ---
  95. apiVersion: v1
  96. kind: Service
  97. metadata:
  98.   labels:
  99.     k8s-app: metrics-server
  100.   name: metrics-server
  101.   namespace: kube-system
  102. spec:
  103.   ports:
  104.   - name: https
  105.     port: 443
  106.     protocol: TCP
  107.     targetPort: https
  108.   selector:
  109.     k8s-app: metrics-server
  110. ---
  111. apiVersion: apps/v1
  112. kind: Deployment
  113. metadata:
  114.   labels:
  115.     k8s-app: metrics-server
  116.   name: metrics-server
  117.   namespace: kube-system
  118. spec:
  119.   selector:
  120.     matchLabels:
  121.       k8s-app: metrics-server
  122.   strategy:
  123.     rollingUpdate:
  124.       maxUnavailable: 0
  125.   template:
  126.     metadata:
  127.       labels:
  128.         k8s-app: metrics-server
  129.     spec:
  130.       containers:
  131.       - args:
  132.         - --cert-dir=/tmp
  133.         - --kubelet-insecure-tls
  134.         - --secure-port=4443
  135.         - --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
  136.         - --kubelet-use-node-status-port
  137.         image: registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images/metrics-server:v0.4.3
  138.         imagePullPolicy: IfNotPresent
  139.         livenessProbe:
  140.           failureThreshold: 3
  141.           httpGet:
  142.             path: /livez
  143.             port: https
  144.             scheme: HTTPS
  145.           periodSeconds: 10
  146.         name: metrics-server
  147.         ports:
  148.         - containerPort: 4443
  149.           name: https
  150.           protocol: TCP
  151.         readinessProbe:
  152.           failureThreshold: 3
  153.           httpGet:
  154.             path: /readyz
  155.             port: https
  156.             scheme: HTTPS
  157.           periodSeconds: 10
  158.         securityContext:
  159.           readOnlyRootFilesystem: true
  160.           runAsNonRoot: true
  161.           runAsUser: 1000
  162.         volumeMounts:
  163.         - mountPath: /tmp
  164.           name: tmp-dir
  165.       nodeSelector:
  166.         kubernetes.io/os: linux
  167.       priorityClassName: system-cluster-critical
  168.       serviceAccountName: metrics-server
  169.       volumes:
  170.       - emptyDir: {}
  171.         name: tmp-dir
  172. ---
  173. apiVersion: apiregistration.k8s.io/v1
  174. kind: APIService
  175. metadata:
  176.   labels:
  177.     k8s-app: metrics-server
  178.   name: v1beta1.metrics.k8s.io
  179. spec:
  180.   group: metrics.k8s.io
  181.   groupPriorityMinimum: 100
  182.   insecureSkipTLSVerify: true
  183.   service:
  184.     name: metrics-server
  185.     namespace: kube-system
  186.   version: v1beta1
  187.   versionPriority: 100

二、安装KubeSphere

1、下载核心文件

  1. wget https://github.com/kubesphere/ks-installer/releases/download/v3.1.1/kubesphere-installer.yaml
  2. wget https://github.com/kubesphere/ks-installer/releases/download/v3.1.1/cluster-configuration.yaml

如果下载不到，请用下面的地址

  1. wget https://www.suibibk.com//fileupload/files/kubesphere-installer.yaml
  2. wget https://www.suibibk.com//fileupload/files/cluster-configuration.yaml

2、修改cluster-configuration

在 cluster-configuration.yaml中指定我们需要开启的功能
参照官网“启用可插拔组件”
https://kubesphere.io/zh/docs/v3.3/pluggable-components/

3、执行安装

  1. kubectl apply -f kubesphere-installer.yaml
  2. kubectl apply -f cluster-configuration.yaml

4、查看安装进度

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

要过一会才能查看到进度

  1. **************************************************
  2. Waiting for all tasks to be completed ...
  3. task network status is successful  (1/11)
  4. task alerting status is successful  (2/11)
  5. task multicluster status is successful  (3/11)
  6. task openpitrix status is successful  (4/11)
  7. task auditing status is successful  (5/11)
  8. task logging status is successful  (6/11)
  9. task events status is successful  (7/11)
  10. task kubeedge status is successful  (8/11)
  11. task devops status is successful  (9/11)
  12. task monitoring status is successful  (10/11)
  13. ...

貌似要等挺久的呢，等待中…

  1. **************************************************
  2. Collecting installation results ...
  3. #####################################################
  4. ###              Welcome to KubeSphere!           ###
  5. #####################################################
  7. Console: http://192.168.192.8:30880
  8. Account: admin
  9. Password: P@88w0rd

我能说等了差不多一个钟么，我以为坏掉了呢！可能是我的本地配置太垃圾了，尝试访问下。

5、访问登录

登录后，我把密码改为了：Abc123

也就是后面实战的登录为

  1. Console: http://192.168.192.8:30880
  2. Account: admin
  3. Password: Abc123

参考
1、视频教程
https://www.bilibili.com/video/BV13Q4y1C7hS
2、笔记
https://www.yuque.com/leifengyang/oncloud/

 604

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