K8s集成KubeSphere

准备工作

如需在 Kubernetes 上安装 KubeSphere 3.2.1，您的 Kubernetes 版本必须为：v1.19.x，v1.20.x，v1.21.x 或 v1.22.x（实验性支持）。

可用 CPU > 1 核；内存 > 2 G。

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

使用 –cluster-signing-cert-file 和 –cluster-signing-key-file 参数启动集群时，kube-apiserver 将启用 CSR 签名功能。请参见 RKE 安装问题。

# 检查版本
kubectl version

# 检查可用资源
free -g

# 检查是否有默认 StorageClass
kubectl get sc

可以看到 K8S 集群中目前没有 StorageClass 资源，需要创建资源。

配置动态供应的默认存储

---
# 创建动态供应的默认存储
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: nfs-storage
  annotations:
    storageclass.kubernetes.io/is-default-class: "true"
provisioner: k8s-sigs.io/nfs-subdir-external-provisioner
parameters:
  archiveOnDelete: "true"  ## 删除pv的时候，pv的内容是否要备份
---
# 创建nfs部署
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nfs-client-provisioner
  labels:
    app: nfs-client-provisioner
  namespace: k8s-test
spec:
  replicas: 1
  strategy:
    type: Recreate
  selector:
    matchLabels:
      app: nfs-client-provisioner
  template:
    metadata:
      labels:
        app: nfs-client-provisioner
    spec:
      serviceAccountName: nfs-client-provisioner
      containers:
        - name: nfs-client-provisioner
          image: registry.cn-hangzhou.aliyuncs.com/lfy_k8s_images/nfs-subdir-external-provisioner:v4.0.2
          resources:
            limits:
              cpu: 100G
            requests:
              cpu: 100G
          volumeMounts:
            - name: nfs-client-root
              mountPath: /persistentvolumes
          env:
            - name: PROVISIONER_NAME
              value: k8s-sigs.io/nfs-subdir-external-provisioner
            - name: NFS_SERVER
              value: 172.31.39.64 ## 指定自己nfs服务器地址
            - name: NFS_PATH
              value: /root/nfs/data  ## nfs服务器共享的目录
      volumes:
        - name: nfs-client-root
          nfs:
            server: 172.31.39.64
            path: /root/nfs/data
---
# 创建服务账户
apiVersion: v1
kind: ServiceAccount
metadata:
  name: nfs-client-provisioner
  namespace: k8s-test
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: nfs-client-provisioner-runner
rules:
  - apiGroups: [""]
    resources: ["nodes"]
    verbs: ["get", "list", "watch"]
  - apiGroups: [""]
    resources: ["persistentvolumes"]
    verbs: ["get", "list", "watch", "create", "delete"]
  - apiGroups: [""]
    resources: ["persistentvolumeclaims"]
    verbs: ["get", "list", "watch", "update"]
  - apiGroups: ["storage.k8s.io"]
    resources: ["storageclasses"]
    verbs: ["get", "list", "watch"]
  - apiGroups: [""]
    resources: ["events"]
    verbs: ["create", "update", "patch"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: run-nfs-client-provisioner
subjects:
  - kind: ServiceAccount
    name: nfs-client-provisioner
    namespace: k8s-test
roleRef:
  kind: ClusterRole
  name: nfs-client-provisioner-runner
  apiGroup: rbac.authorization.k8s.io
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: leader-locking-nfs-client-provisioner
  namespace: k8s-test
rules:
  - apiGroups: [""]
    resources: ["endpoints"]
    verbs: ["get", "list", "watch", "create", "update", "patch"]
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: leader-locking-nfs-client-provisioner
  namespace: k8s-test
subjects:
  - kind: ServiceAccount
    name: nfs-client-provisioner
    namespace: k8s-test
roleRef:
  kind: Role
  name: leader-locking-nfs-client-provisioner
  apiGroup: rbac.authorization.k8s.io

部署 KubeSphere

确保现有的Kubernetes集群满足所有要求之后，执行以下命令：

1. 开始安装

# 下载并应用kubesphere-installer文件
kubectl apply -f https://github.com/kubesphere/ks-installer/releases/download/v3.3.0/kubesphere-installer.yaml

# 下载并应用cluster-configuration文件
kubectl apply -f https://github.com/kubesphere/ks-installer/releases/download/v3.3.0/cluster-configuration.yaml

1. 检查安装日志

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

1. 使用 kubectl get pod --all-namespaces 查看所有 Pod 在 KubeSphere相关的命名空间是否正常运行。如果是正常运行，请通过以下命令来检查控制台的端口（默认为 30880）：

kubectl get svc/ks-console -n kubesphere-system

1. 通过 NodePort (IP:30880) 使用默认帐户和密码 (admin/P@88w0rd) 访问 Web 控制台。