首先，准备三台虚拟机，一台master，两台node

环境说明:

• Ubuntu 20.04
• master 192.168.5.112
• node 192.168.5.113,192.168.5.114

WARNING

必须修改主机名

在master机器上运行如下命令

curl -sfL http://rancher-mirror.cnrancher.com/k3s/k3s-install.sh | INSTALL_K3S_MIRROR=cn sh -s - --docker

# 安装状态
kubectl get all -n kube-system

token地址/var/lib/rancher/k3s/server/node-token

token:K10ab5ba1d423c4d2af65b0fc7148d9a2642c9b143af8864166c3758d3b3f69ed45::server:76d0e237dc24a5f973ffdc62f1156841

节点上运行如下命令

curl -sfL http://rancher-mirror.cnrancher.com/k3s/k3s-install.sh | INSTALL_K3S_MIRROR=cn K3S_URL=https://192.168.5.112:6443 K3S_TOKEN=K10ab5ba1d423c4d2af65b0fc7148d9a2642c9b143af8864166c3758d3b3f69ed45::server:76d0e237dc24a5f973ffdc62f1156841 sh -s - --docker

完成后在master运行kubectl get node查看节点是否已经接入

配置数据库

• mysql-deployment.yaml

apiVersion: v1
kind: ReplicationController
metadata:
  name: mysql-rc
  labels:
    name: mysql-rc
spec:
  replicas: 1
  selector:
    name: mysql-pod
  template:
    metadata:
      labels: 
        name: mysql-pod
    spec:
      containers:
      - name: mysql
        image: mysql
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 3306
        env:
        - name: MYSQL_ROOT_PASSWORD
          value: "root"

• mysql-service.yml

apiVersion: v1
kind: Service
metadata:
  name: mysql-svc
  labels: 
    name: mysql-svc
spec:
  type: NodePort
  ports:
  - port: 3306
    protocol: TCP
    targetPort: 3306
    name: http
    nodePort: 30306
  selector:
    name: mysql-pod

执行以下命令

# 创建应用
kubectl create -f mysql-deployment.yaml
kubectl create -f mysql-service.yml

# 查看pod
kubectl get pod

链接数据库 192.168.5.112:30306/root@root

To Be Continued！😎