# 原生DB
***创建* *go版本下database/sql包sql.DB数据源，进行mysql操作***。
1. 在go.mod文件中引入依赖，即引入MAS-GO-SDK。 
   ```
   github.com/huaweicloud/devcloud-go
   ```
   ![](https://support.huaweicloud.com/devg-mas/zh-cn_image_0000001217003630.png)
   
   
2. 结合[配置项说明](https://support.huaweicloud.com/devg-mas/mas-devg-0056.html)，添加配置文件或者配置信息。
   
   - 配置文件示例config_mysql.yaml。
     ```
     props:
       version: v1
       appId: xxx
       monitorId: xxxx
       databaseName: xxxx
     etcd:
       address: xxx.xxx.xxx.xxx:xxxx
       apiVersion: v3
       username: xxxx
       password: xxxx
       httpsEnable: false
     # require
     datasource:
       ds0:
         url: tcp(xxx.xxx.xxx.xxx:xxxx)/ds0
         username: xxxx
         password: xxxx
       ds0-slave0:
         url: tcp(xxx.xxx.xxx.xxx:xxxx)/ds0-slave0
         username: xxxx
         password: xxxx
       ds0-slave1:
         url: tcp(xxx.xxx.xxx.xxx:xxxx)/ds0-slave1
         username: xxxx
         password: xxxx
       ds1:
         url: tcp(xxx.xxx.xxx.xxx:xxxx)/ds1
         username: xxxx
         password: xxxx
       ds1-slave0:
         url: tcp(xxx.xxx.xxx.xxx:xxxx)/ds1-slave0
         username: xxxx
         password: xxxx
       ds1-slave1:
         url: tcp(xxx.xxx.xxx.xxx:xxxx)/ds1-slave1
         username: xxxx
         password: xxxx
     # require
     router:
       active: c0
       routeAlgorithm: single-read-write
       retry:
         times: 10
         delay: 50# ms
       nodes:
         c0:
           master: ds0
           loadBalance: RANDOM
           slaves:
             - ds0-slave0
             - ds0-slave1
         c1:
           master: ds1
           loadBalance: ROUND_ROBIN
           slaves:
             - ds1-slave0
             - ds1-slave1
     ```
     
   
   - 配置信息。
     ```
     func mysqlConfiguration() *config.ClusterConfiguration {
         return &config.ClusterConfiguration{
             Props: &mas.PropertiesConfiguration{
                 Version: "v1",
                 AppID: "xxx",
                 MonitorID: "xxxx",
                 DatabaseName: "xxx",
             },
             EtcdConfig: &etcd.EtcdConfiguration{
                 Address: "xxx.xxx.xxx.xxx:xxxx",
                 APIVersion: "v3",
                 Username: "xxxx",
                 Password: "xxxx",
                 HTTPSEnable: false,
             },
             RouterConfig: &config.RouterConfiguration{
                 Nodes: map[string]*config.NodeConfiguration{
                   "dc0": {
                         Master: "ds0",
                         LoadBalance: "RANDOM",
                         Slaves: []string{"ds0-slave0","ds0-slave1"},
                     },
                 "dc1": {
                         Master: "ds1",
                         LoadBalance: "ROUND_ROBIN",
                         Slaves: []string{"ds1-slave0","ds1-slave1"},
                     },
                 },
                 Active: "dc0",
                 Retry: &config.RetryConfiguration{
                     Times: "10",
                     Delay: "50",
                 },
                 RouteAlgorithm: "single-read-write",
             },
             DataSource: map[string]*config.DataSourceConfiguration{
                 "ds0": {
                     URL:      "tcp(xxx.xxx.xxx.xxx:xxxx)/ds0",
                     Username: "xxxx",
                     Password: "xxxx",
                 },
                 "ds0-slave0": {
                     URL:      "tcp(xxx.xxx.xxx.xxx:xxxx)/ds0-slave0",
                     Username: "xxxx",
                     Password: "xxxx",
                 },
                 "ds0-slave1": {
                     URL:      "tcp(xxx.xxx.xxx.xxx:xxxx)/ds0-slave1",
                     Username: "xxxx",
                     Password: "xxxx",
                 },
                 "ds1": {
                     URL:      "tcp(xxx.xxx.xxx.xxx:xxxx)/ds1",
                     Username: "xxxx",
                     Password: "xxxx",
                 },
                 "ds1-slave0": {
                     URL:      "tcp(xxx.xxx.xxx.xxx:xxxx)/ds1-slave0",
                     Username: "xxxx",
                     Password: "xxxx",
                 },
                 "ds1-slave1": {
                     URL:      "tcp(xxx.xxx.xxx.xxx:xxxx)/ds1-slave1",
                     Username: "xxxx",
                     Password: "xxxx",
                 },
             },
         }
     }
     ```
     
   
   
   
   
3. 初始化创建sql.DB数据源DevSporeDb。 
   - 配置文件方式创建
     ```
     import (
         "database/sql"
         "log"
         _ "github.com/huaweicloud/devcloud-go/sql-driver/mysql"
     )
     var (
         DevSporeDb *sql.DB
         err error
     )
     func init() {
         DevSporeDb, err = sql.Open("devspore_mysql", "./conf/resources/config_mysql.yaml")
         if err != nil {
             log.Fatalln(err)
         }
     }
     ```
     
   
   - 配置信息方式创建。
     ```
     import (
         "database/sql"
         "log"
         devspore "github.com/huaweicloud/devcloud-go/sql-driver/mysql"
     )
     var (
         DevSporeDb *sql.DB
         err error
     )
     func init() {
         devspore.SetClusterConfiguration(mysqlConfiguration())
         DevSporeDb, err = sql.Open("devspore_mysql", "")
         if err != nil {
             log.Fatalln(err)
         }
     }
     ```
     
   
   
   
   
4. 在需要执行MySQL操作的地方使用DevSporeDb执行MySQL操作，具体执行因业务各异，执行对应的sql.DB命令。