關于kubesphere1.20.0安裝詳細步驟

##準備環境

名稱      IP                 系統
master    192.168.1.43       Centos7.9
node1     192.168.1.44       Centos7.9
node2     192.168.1.45       Centos7.9
NFS       192.168.1.46       Centos7.9

安裝docker
這里docker的安裝用腳本快速安裝，也可以yum安裝，這里就不多說了（：

根據規劃設定主機名

hostnamectl set-hostname master
hostnamectl set-hostname node1
hostnamectl set-hostname node2

在添加hosts

cat >> /etc/hosts << EOF
192.168.1.43 master
192.168.1.44 node1
192.168.1.45 node2
EOF

關閉防火墻

systemctl stop firewalld && systemctl disable firewalld

關閉selinux(在3臺機運行)

sed -i 's/enforcing/disabled/' /etc/selinux/config && setenforce 0

關閉swap

swapoff -a && sed -ri 's/.*swap.*/#&/' /etc/fstab

時間同步

yum install ntpdate -y && ntpdate time.windows.com

配置內核引數，將橋接的IPv4流量傳遞到iptables的鏈

cat > /etc/sysctl.d/k8s.conf <<EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF

使配置的內核引數生效

sysctl --system

添加kubernetes阿里YUM源

cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

安裝kubectl、kubelet、kubeadm并設定開機啟動

yum install kubectl-1.20.0 kubelet-1.20.0 kubeadm-1.20.0 && systemctl enable kubelet && systemctl start kubelet

初始化k8s集群

kubeadm init --kubernetes-version=1.20.0  \
--apiserver-advertise-address=192.168.1.43   \
--image-repository registry.aliyuncs.com/google_containers  \
--service-cidr=10.10.0.0/16 --pod-network-cidr=10.122.0.0/16

至此kubenetes已經安裝完成，初始化成功后根據生成kubectl jion樣式命令在弄的節點執行，可將該節點加入集群（注：初始化成功之后會有兩串命令一個是將改節點以master身份加入，另一個是作為node加入），添加完成之后輸入命令：kubectl get node 會顯示該集群的所有節點，但是此時的節點都為NotReady狀態，在添加網路插件之后，節點狀態為Ready
安裝flannel網路插件

kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml

發送admin.conf到所有節點，可以在任何一個節點管理集群

scp /etc/kubernetes/admin.conf root@node1:/etc/kubernetes/admin.conf
scp /etc/kubernetes/admin.conf root@node2:/etc/kubernetes/admin.conf

在node節點上加入環境變數

echo "export KUBECONFIG=/etc/kubernetes/admin.conf" >> /etc/profile
source /etc/profile

安裝NFS

安裝nfs-utils、rpcbind（master和node都安裝）

yum install nfs-utils rpcbind -y

啟動服務(注意服務啟動順序)

systemctl start rpcbind
systemctl start nfs

掛載目錄（在宿主機創建相應目錄）

mount -t nfs 192.168.1.46:/data/nfs /mnt

編輯exports，設定權限（這里的權限一定要給NFS的目錄寫的權限）

vim /etc/exports
/data/nfs *(rw,no_root_squash,sync)

查看是否掛載

showmount -e 192.168.1.43

生成stronge-class
編輯1.yaml檔案

---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: nfs-provisioner
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
   name: nfs-provisioner-runner
   namespace: default
rules:
   -  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: ["watch", "create", "update", "patch"]
   -  apiGroups: [""]
      resources: ["services", "endpoints"]
      verbs: ["get","create","list", "watch","update"]
   -  apiGroups: ["extensions"]
      resources: ["podsecuritypolicies"]
      resourceNames: ["nfs-provisioner"]
      verbs: ["use"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: run-nfs-provisioner
subjects:
  - kind: ServiceAccount
    name: nfs-provisioner
    namespace: default
roleRef:
  kind: ClusterRole
  name: nfs-provisioner-runner
  apiGroup: rbac.authorization.k8s.io

編輯2.yaml檔案

kind: Deployment
apiVersion: apps/v1
metadata:
  name: nfs-client-provisioner
spec:
  selector:
    matchLabels:
      app: nfs-client-provisioner
  replicas: 1
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: nfs-client-provisioner
    spec:
      serviceAccount: nfs-provisioner
      containers:
        - name: nfs-client-provisioner
          image: vbouchaud/nfs-client-provisioner
          volumeMounts:
            - name: nfs-client
              mountPath: /persistentvolumes
          env:
            - name: PROVISIONER_NAME
              value: fuseim.pri/ifs
            - name: NFS_SERVER
              value: 192.168.1.46  ##NFS的IP
            - name: NFS_PATH
              value: /data/nfs   ##宿主機NFS掛載的目錄
      volu0mes:
        - name: nfs-client
          nfs:
            server: 192.168.1.46    ##NFS的IP
            path: /data/nfs    ##宿主機NFS掛載的目錄

編輯3.yaml檔案

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: nfs-storage
provisioner: fuseim.pri/ifs
reclaimPolicy: Retain

按順序在master上執行

kubectl apply -f 1.yaml
kubectl apply -f 2.yaml
kubectl apply -f 3.yaml

設定默認存盤(檢查是否設定為默認存盤：kubectl get sc)

kubectl patch storageclass nfs-storage -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'

以上步驟都成功執行之后，開始安裝kubesphere

kubectl apply -f https://github.com/kubesphere/ks-installer/releases/download/v3.1.0/kubesphere-installer.yaml
kubectl apply -f https://github.com/kubesphere/ks-installer/releases/download/v3.1.0/cluster-configuration.yaml

檢查日志

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

如果日志沒有失敗，在日志最后會輸出kubesphere的訪問地址以及登錄的賬號地址

參考文獻

##安裝Kubernetes：https://blog.csdn.net/u013218587/article/details/111186022
##nfs相關：https://www.cnblogs.com/whych/p/9196537.html
##設定默認存盤：:https://blog.csdn.net/u011943534/article/details/100887530
##安裝kubesphere：https://kubesphere.com.cn/docs/quick-start/minimal-kubesphere-on-k8s/
##啟用可插拔熱鍵：https://kubesphere.com.cn/docs/quick-start/enable-pluggable-components/#%E5%9C%A8%E5%AE%89%E8%A3%85%E5%90%8E%E5%90%AF%E7%94%A8%E5%8F%AF%E6%8F%92%E6%8B%94%E7%BB%84%E4%BB%B6