k8s使用外部mysql做内部服务

创建 mysql-endpoints.yaml

apiVersion: v1
kind: Endpoints
metadata:
  name: mysql-dev
  namespace: default
subsets:
  - addresses:
    - ip: 10.1.0.32
    ports:
      - port: 3306

创建mysql-service.yaml

apiVersion: v1
kind: Service
metadata:
  name: mysql-dev
spec:
  ports:
    - port: 3306

apiVersion: v1
kind: Service
metadata:
  name: mysql-dev
  namespace: default
spec:
  clusterIP: 10.1.61.45
  ports:
  - port: 3306
    targetPort: 3306
    protocol: TCP

使用数据库服务

main.go

package main

import (
    "database/sql"
    "fmt"
    _ "github.com/go-sql-driver/mysql"
    "net/http"
)

func IndexHandler(w http.ResponseWriter, r *http.Request) {
    _, _ = fmt.Fprintln(w, "hello rushui")
}

func RowsHandler(w http.ResponseWriter, r *http.Request) {
    //第⼀步：打开数据库,格式是 ⽤户名：密码@/数据库名称？编码⽅式
    db, err := sql.Open("mysql", "root:root@tcp(mysql-dev:3306)/test?charset=utf8")
    if err != nil {
        fmt.Println(err)
    }
    //关闭数据库
    var id int
    var name string
    //查询数据，指定字段名，返回sql.Rows结果集
    rows, err := db.Query("select id,name from user")
    if err != nil {
        fmt.Println(err)
    }
    defer rows.Close()
    for rows.Next() {
        _ = rows.Scan(&id, &name)
        _, _ = fmt.Fprintln(w, name)
    }
}

func main() {
    http.HandleFunc("/", IndexHandler)
    http.HandleFunc("/rows", RowsHandler)
    _ = http.ListenAndServe(":8081", nil)
}