MGR高可用

mysql-router

[https://mirrors.tuna.tsinghua.edu.cn/mysql/downloads/MySQL-Router/](https://mirrors.tuna.tsinghua.edu.cn/mysql/downloads/MySQL-Router/)

mysql-router-2.0.3-linux-glibc2.12-x86-64bit.tar.gz

![image.png](https://upload-images.jianshu.io/upload_images/13766704-b0865bf7cb6da042.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

参考：https://cloud.tencent.com/developer/article/1697593

[root@MiWiFi-R3600-srv mysql-router]# cat /etc/mysql-route/mysqlrouter.conf

# MySQL Router sample configuration
#
# The following is a sample configuration file which shows
# most of the plugins available and most of their options.
#
# The paths used are defaults and should be adapted based
# on how MySQL Router was installed, for example, using the
# CMake option CMAKE_INSTALL_PREFIX
#
# The logging_folder is kept empty so message go to the
# console.
#
# The fabric_cache plugin only works with the MySQL-RPC
# protocol (by default running on port 32275)
#

[DEFAULT]
# 日志存放目录
logging_folder = /data/log/mysql-route
# 插件存放目录
plugin_folder = /usr/local/mysql-router/lib/mysqlrouter
# 配置文件存放目录
config_folder = /etc/mysql-route
# 运行目录
runtime_folder = /var/run

#[logger]
# 日志运行级别
level = INFO

#[fabric_cache]
#address = your_fabric_node.example.com:32275
#user =

[routing:basic_failover]
# To be more transparent, use MySQL Server port 3306
#bind_port = 7001
#mode = read-write
#destinations = mysql-server1:3306,mysql-server2
# 写节点地址
bind_address = 192.168.31.207
# 写节点端口
bind_port = 7001
# 模式，读写
mode = read-write
# 主节点地址：默认情况下第一台主数据库为写主库，当第一台主数据库DOWN机后，第二台数据库被提升为主库
destinations = 192.168.31.207:3306,192.168.31.28:3306,192.168.31.23:3306



#[routing:homepage_reads_fabric]
#bind_port = 7002
#destinations = fabric+cache:///group/homepage_group?allow_primary_reads=yes
#mode = read-only

# If no plugin is configured which starts a service, keepalive
# will make sure MySQL Router will not immediately exit. It is
# safe to remove once Router is configured.
[keepalive]
interval = 60

测试

            org.apache.commons
            commons-lang3
        
        
            mysql
            mysql-connector-java
            5.1.46
        
        
            mysql
            mysql-connector-java
            5.1.46
        

Java

package com.minio.demo.testdb;

import org.apache.commons.lang3.StringUtils;

import java.sql.*;
import java.util.UUID;

/**
 * @Author: LLL
 * @Description:
 * @Date: create in 2021/11/9 21:39
 */
public class test1 {

    static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
    static final String DB_URL = "jdbc:mysql://192.168.31.207:7001/test?useSSL=false";
    static final String USER = "root";
    static final String PASS = "Zhongruan@2021";

    public static void main(String[] args) {
        for (int i = 0; i < 10000; i++) {
            System.out.println(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>> " + i);
            db2();
            System.out.println();
            System.out.println();
        }
    }

    private static void db() {
        Connection conn = null;
        Statement stmt = null;
        try {
            // 注册 JDBC 驱动
            Class.forName(JDBC_DRIVER);

            // 打开链接
            //            System.out.println(" 连接数据库...");
            conn = DriverManager.getConnection(DB_URL, USER, PASS);

            // 执行查询
            //            System.out.println("======================================");
            //            System.out.println(" 实例化 Statement 对象...");
            stmt = conn.createStatement();
            String sql;
            sql = "SELECT * FROM t_user";
            ResultSet rs = stmt.executeQuery(sql);

            // 展开结果集数据库
            while (rs.next()) {
                // 通过字段检索
                int id = rs.getInt("id");
                String name = rs.getString("name");
                Integer age = rs.getInt("age");
                String job = rs.getString("job");

                if (StringUtils.isEmpty(name)) {
                    System.out.println("查不到数据...");
                }
                // 输出数据
                System.out.print("ID: " + id);
                System.out.print(", 名称: " + name);
                System.out.print(", 年龄: " + age);
                System.out.print(", 专业: " + job);
                System.out.print("\n");
            }
            // 完成后关闭
            rs.close();
            stmt.close();
            conn.close();
        } catch (SQLException se) {
            // 处理 JDBC 错误
            se.printStackTrace();
        } catch (Exception e) {
            // 处理 Class.forName 错误
            e.printStackTrace();
        } finally {
            // 关闭资源
            try {
                if (stmt != null) {
                    stmt.close();
                }
            } catch (SQLException se2) {
            }// 什么都不做
            try {
                if (conn != null) {
                    conn.close();
                }
            } catch (SQLException se) {
                se.printStackTrace();
            }
        }
        //        System.out.println("======================================");
    }


    private static void db2() {
        Connection conn = null;
        Statement stmt = null;
        try {
            // 注册 JDBC 驱动
            Class.forName(JDBC_DRIVER);

            // 打开链接
            conn = DriverManager.getConnection(DB_URL, USER, PASS);


            String sql = "insert into t_user(`id`, `name`, `age`, `job`) values(?,'小李', '18', 'java')";
            PreparedStatement pstmt = conn.prepareStatement(sql);
            String uuid = UUID.randomUUID().toString();
            pstmt.setString(1, uuid);

            int res = pstmt.executeUpdate();
            if (res > 0) {
                System.out.println(uuid + " 数据录入成功");
            }
            pstmt.close();//关闭资源
            conn.close();//关闭资源

        } catch (SQLException se) {
            // 处理 JDBC 错误
            se.printStackTrace();
        } catch (Exception e) {
            // 处理 Class.forName 错误
            e.printStackTrace();
        } finally {
            // 关闭资源
            try {
                if (stmt != null) {
                    stmt.close();
                }
            } catch (SQLException se2) {
            }// 什么都不做
            try {
                if (conn != null) {
                    conn.close();
                }
            } catch (SQLException se) {
                se.printStackTrace();
            }
        }
        //        System.out.println("======================================");
    }

}