【DB宝42】MySQL高可用架构MHA+ProxySQL实现读写分离和负载均衡

文章目录

  • 一、MHA+ProxySQL架构
  • 二、快速搭建MHA环境
    • 2.1 下载MHA镜像
    • 2.2 编辑yml文件,创建MHA相关容器
    • 2.3 安装docker-compose软件(若已安装,可忽略)
    • 2.4 创建MHA容器
    • 2.5 主库131添加VIP
  • 三、配置ProxySQL环境
    • 3.4.1 向ProxySQL插入被监控数据库
    • 3.4.2 在所有被监控MySQL服务器上创建监控帐户
    • 3.4.3 在所有被监控MySQL服务器上创建对外访问账户
    • 3.4.4 配置监控
    • 3.4.5 配置MySQL主机组
    • 3.4.6 配置读写分离策略
    • 3.1 申请ProxySQL主机并安装ProxySQL
    • 3.2 添加远程登录用户
    • 3.3 开启ProxySQL的web监控功能
    • 3.4 配置被监控的数据库
  • 四、测试读负载均衡
  • 五、测试读写分离
  • 六、故障切换
  • 七、界面监控结果(ProxySQL本身+PMM监控)
    • 7.1 ProxySQL自带监控
    • 7.2 PMM监控


一、MHA+ProxySQL架构

之前发过一篇MHA的文章,介绍了MHA相关的知识和功能测试,连接为:【DB宝19】在Docker中使用MySQL高可用之MHA 。今天这一篇给大家分享一下“MHA+中间件ProxySQL”来实现读写分离+负载均衡的相关知识。

我们都知道,MHA(Master High Availability Manager and tools for MySQL)目前在MySQL高可用方面是一个相对成熟的解决方案,是一套作为MySQL高可用性环境下故障切换和主从提升的高可用软件。它的架构是要求一个MySQL复制集群必须最少有3台数据库服务器,一主二从,即一台充当Master,一台充当备用Master,另一台充当从库。但是,如果不连接任何外部的数据库中间件,那么就会导致所有的业务压力流向主库,从而造成主库压力过大,而2个从库除了本身的IO和SQL线程外,无任何业务压力,会严重造成资源的浪费。因此,我们可以把MHA和ProxySQL结合使用来实现读写分离和负载均衡。所有的业务通过中间件ProxySQL后,会被分配到不同的MySQL机器上。从而,前端的写操作会流向主库,而读操作会被负载均衡的转发到2个从库上。

MHA+ProxySQL架构如下图所示:

二、快速搭建MHA环境

2.1 下载MHA镜像

  • 小麦苗的Docker Hub的地址:https://hub.docker.com/u/lhrbest
-- 下载镜像docker pull registry.cn-hangzhou.aliyuncs.com/lhrbest/mha-lhr-master1-ip131docker pull registry.cn-hangzhou.aliyuncs.com/lhrbest/mha-lhr-slave1-ip132docker pull registry.cn-hangzhou.aliyuncs.com/lhrbest/mha-lhr-slave2-ip133docker pull registry.cn-hangzhou.aliyuncs.com/lhrbest/mha-lhr-monitor-ip134-- 重命名镜像docker tag registry.cn-hangzhou.aliyuncs.com/lhrbest/mha-lhr-master1-ip131  lhrbest/mha-lhr-master1-ip131docker tagregistry.cn-hangzhou.aliyuncs.com/lhrbest/mha-lhr-slave1-ip132   lhrbest/mha-lhr-slave1-ip132 docker tagregistry.cn-hangzhou.aliyuncs.com/lhrbest/mha-lhr-slave2-ip133   lhrbest/mha-lhr-slave2-ip133 docker tagregistry.cn-hangzhou.aliyuncs.com/lhrbest/mha-lhr-monitor-ip134  lhrbest/mha-lhr-monitor-ip134


一共4个镜像,3个MHA Node,一个MHA Manager,压缩包大概3G,下载完成后:

[root@lhrdocker ~]# docker images | grep mharegistry.cn-hangzhou.aliyuncs.com/lhrbest/mha-lhr-monitor-ip134          latest              7d29597dc997        14 hours ago        1.53GBregistry.cn-hangzhou.aliyuncs.com/lhrbest/mha-lhr-slave2-ip133           latest              d3717794e93a        40 hours ago        4.56GBregistry.cn-hangzhou.aliyuncs.com/lhrbest/mha-lhr-slave1-ip132           latest              f62ee813e487        40 hours ago        4.56GBregistry.cn-hangzhou.aliyuncs.com/lhrbest/mha-lhr-master1-ip131          latest              ae7be48d83dc        40 hours ago        4.56GB


2.2 编辑yml文件,创建MHA相关容器

编辑yml文件,使用docker-compose来创建MHA相关容器,注意docker-compose.yml文件的格式,对空格、缩进、对齐都有严格要求:

# 创建存放yml文件的路径mkdir -p /root/mha# 编辑文件/root/mha/docker-compose.ymlcat > /root/mha/docker-compose.yml <<"EOF"version: '3.8'services:  MHA-LHR-Master1-ip131:    container_name: "MHA-LHR-Master1-ip131"restart: "always"hostname: MHA-LHR-Master1-ip131    privileged: trueimage: lhrbest/mha-lhr-master1-ip131    ports:      - "33131:3306"  - "2201:22"networks:      mhalhr:        ipv4_address: 192.168.68.131  MHA-LHR-Slave1-ip132:    container_name: "MHA-LHR-Slave1-ip132"restart: "always"hostname: MHA-LHR-Slave1-ip132    privileged: trueimage: lhrbest/mha-lhr-slave1-ip132    ports:      - "33132:3306"  - "2202:22"networks:      mhalhr:        ipv4_address: 192.168.68.132  MHA-LHR-Slave2-ip133:    container_name: "MHA-LHR-Slave2-ip133"restart: "always"hostname: MHA-LHR-Slave2-ip133    privileged: trueimage: lhrbest/mha-lhr-slave2-ip133    ports:      - "33133:3306"  - "2203:22"networks:      mhalhr:        ipv4_address: 192.168.68.133  MHA-LHR-Monitor-ip134:    container_name: "MHA-LHR-Monitor-ip134"restart: "always"hostname: MHA-LHR-Monitor-ip134    privileged: trueimage: lhrbest/mha-lhr-monitor-ip134    ports:      - "33134:3306"  - "2204:22"networks:      mhalhr:        ipv4_address: 192.168.68.134networks:  mhalhr:    name: mhalhr    ipam:      config:         - subnet: "192.168.68.0/16"EOF


2.3 安装docker-compose软件(若已安装,可忽略)

  • 安装 Docker Compose官方文档:https://docs.docker.com/compose/

  • 编辑docker-compose.yml文件官方文档:https://docs.docker.com/compose/compose-file/

[root@lhrdocker ~]# curl --insecure -L https://github.com/docker/compose/releases/download/1.28.4/docker-compose-Linux-x86_64 -o /usr/local/bin/docker-compose  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current Dload  Upload   Total   Spent    Left  Speed100   638  100   638    0     0    530      0  0:00:01  0:00:01 --:--:--   531100 11.6M  100 11.6M    0     0  1994k      0  0:00:06  0:00:06 --:--:-- 2943k[root@lhrdocker ~]# chmod +x /usr/local/bin/docker-compose[root@lhrdocker ~]# docker-compose -vdocker-compose version 1.28.4, build cabd5cfb


2.4 创建MHA容器

# 启动mha环境的容器,一定要进入文件夹/root/mha/后再操作-- docker rm -f MHA-LHR-Master1-ip131 MHA-LHR-Slave1-ip132 MHA-LHR-Slave2-ip133 MHA-LHR-Monitor-ip134[root@lhrdocker ~]# cd /root/mha/[root@lhrdocker mha]#[root@lhrdocker mha]# docker-compose up -dCreating network "mhalhr" with the default driverCreating MHA-LHR-Monitor-ip134 ... doneCreating MHA-LHR-Slave2-ip133  ... doneCreating MHA-LHR-Master1-ip131 ... doneCreating MHA-LHR-Slave1-ip132  ... done[root@docker35 ~]# docker ps | grep "mha\|COMMAND" CONTAINER ID        IMAGE                           COMMAND                  CREATED             STATUS              PORTS                                                                                           NAMES2978361198b7        lhrbest/mha-lhr-master1-ip131   "/usr/sbin/init"         2 minutes ago       Up 2 minutes        16500-16599/tcp, 0.0.0.0:2201->22/tcp, 0.0.0.0:33131->3306/tcp                                  MHA-LHR-Master1-ip131a64e2e86589c        lhrbest/mha-lhr-slave1-ip132    "/usr/sbin/init"         2 minutes ago       Up 2 minutes        16500-16599/tcp, 0.0.0.0:2202->22/tcp, 0.0.0.0:33132->3306/tcp                                  MHA-LHR-Slave1-ip132d7d6ce34800b        lhrbest/mha-lhr-monitor-ip134   "/usr/sbin/init"         2 minutes ago       Up 2 minutes        0.0.0.0:2204->22/tcp, 0.0.0.0:33134->3306/tcp                                                   MHA-LHR-Monitor-ip134dacd22edb2f8        lhrbest/mha-lhr-slave2-ip133    "/usr/sbin/init"         2 minutes ago       Up 2 minutes        16500-16599/tcp, 0.0.0.0:2203->22/tcp, 0.0.0.0:33133->3306/tcp                                  MHA-LHR-Slave2-ip133


2.5 主库131添加VIP

# 进入主库131docker exec -it MHA-LHR-Master1-ip131 bash# 添加VIP135/sbin/ifconfig eth0:1 192.168.68.135/24ifconfig# 如果删除的话ip addr del 192.168.68.135/24 dev eth1


添加完成后:

[root@MHA-LHR-Master1-ip131 /]# ifconfigeth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500        inet 192.168.68.131  netmask 255.255.0.0  broadcast 192.168.255.255        ether 02:42:c0:a8:44:83  txqueuelen 0  (Ethernet)        RX packets 220  bytes 15883 (15.5 KiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 189  bytes 17524 (17.1 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0eth0:1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500        inet 192.168.68.135  netmask 255.255.255.0  broadcast 192.168.68.255        ether 02:42:c0:a8:44:83  txqueuelen 0  lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536        inet 127.0.0.1  netmask 255.0.0.0        loop  txqueuelen 1000  (Local Loopback)        RX packets 5  bytes 400 (400.0 B)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 5  bytes 400 (400.0 B)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0        # 管理节点已经可以ping通VIP了[root@MHA-LHR-Monitor-ip134 /]# ping 192.168.68.135PING 192.168.68.135 (192.168.68.135) 56(84) bytes of data.64 bytes from 192.168.68.135: icmp_seq=1 ttl=64 time=0.172 ms64 bytes from 192.168.68.135: icmp_seq=2 ttl=64 time=0.076 ms^C--- 192.168.68.135 ping statistics ---2 packets transmitted, 2 received, 0% packet loss, time 1000msrtt min/avg/max/mdev = 0.076/0.124/0.172/0.048 ms


到这一步就可以验证主从复制是否正确,若正确,则可以直接测试MHA了。

mysql -uroot -plhr -h192.168.68.131 -P3306show slave hosts;mysql> show slave hosts;+-----------+----------------+------+-----------+--------------------------------------+| Server_id | Host           | Port | Master_id | Slave_UUID                           |+-----------+----------------+------+-----------+--------------------------------------+| 573306133 | 192.168.68.133 | 3306 | 573306131 | d391ce7e-aec3-11ea-94cd-0242c0a84485 || 573306132 | 192.168.68.132 | 3306 | 573306131 | d24a77d1-aec3-11ea-9399-0242c0a84484 |+-----------+----------------+------+-----------+--------------------------------------+2 rows in set (0.00 sec)


三、配置ProxySQL环境

3.1 申请ProxySQL主机并安装ProxySQL

docker rm -f MHA-LHR-ProxySQL-ip136docker run -d --name MHA-LHR-ProxySQL-ip136 -h MHA-LHR-ProxySQL-ip136 \  -v /sys/fs/cgroup:/sys/fs/cgroup \  --network mhalhr --ip 192.168.68.136 \  -p 26032:6032 -p 26033:6033 -p 26080:6080 \  --privileged=true lhrbest/lhrcentos76:8.0 \  /usr/sbin/initdocker network connect bridge MHA-LHR-ProxySQL-ip136docker restart MHA-LHR-ProxySQL-ip136docker cp proxysql2-2.0.15-1.1.el7.x86_64.rpm MHA-LHR-ProxySQL-ip136:/docker exec -it MHA-LHR-ProxySQL-ip136 bashrpm -ivh proxysql2-2.0.15-1.1.el7.x86_64.rpmsystemctl start proxysqlsystemctl status proxysql


3.2 添加远程登录用户

-- 添加远程登录用户mysql -uadmin -padmin -h127.0.0.1 -P6032select @@admin-admin_credentials;set admin-admin_credentials='admin:admin;root:lhr';select @@admin-admin_credentials;load admin variables to runtime;save admin variables to disk;-- 远程登录mysql -uroot -plhr -h192.168.66.35 -P26032


执行过程:

-- ProxySQL本地登录[root@MHA-LHR-ProxySQL-ip136 /]# mysql -uadmin -padmin -h127.0.0.1 -P6032mysql: [Warning] Using a password on the command line interface can be insecure.Welcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 162Server version: 5.5.30 (ProxySQL Admin Module)Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> select @@admin-admin_credentials;+---------------------------+| @@admin-admin_credentials |+---------------------------+| admin:admin;lhr:lhr       |+---------------------------+1 row in set (0.05 sec)mysql> set admin-admin_credentials='admin:admin;root:lhr';Query OK, 1 row affected (0.00 sec)mysql> select @@admin-admin_credentials;+---------------------------+| @@admin-admin_credentials |+---------------------------+| admin:admin;root:lhr      |+---------------------------+1 row in set (0.00 sec)mysql> load admin variables to runtime;Query OK, 0 rows affected (0.00 sec)mysql> save admin variables to disk;Query OK, 35 rows affected (0.13 sec)mysql> -- 远程登录C:\Users\lhrxxt>mysql -uroot -plhr -h192.168.66.35 -P26032mysql: [Warning] Using a password on the command line interface can be insecure.ERROR 1045 (28000): ProxySQL Error: Access denied for user 'root'@'172.17.0.1' (using password: YES)C:\Users\lhrxxt>mysql -uroot -plhr -h192.168.66.35 -P26032mysql: [Warning] Using a password on the command line interface can be insecure.Welcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 163Server version: 5.5.30 (ProxySQL Admin Module)Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.MySQL [(none)]> show databases;+-----+---------------+-------------------------------------+| seq | name          | file                                |+-----+---------------+-------------------------------------+| 0   | main          |                                     || 2   | disk          | /var/lib/proxysql/proxysql.db       || 3   | stats         |                                     || 4   | monitor       |                                     || 5   | stats_history | /var/lib/proxysql/proxysql_stats.db |+-----+---------------+-------------------------------------+5 rows in set (0.05 sec)


3.3 开启ProxySQL的web监控功能

-- 开启web监控功能SET admin-web_enabled='true';LOAD ADMIN VARIABLES TO RUNTIME;SAVE ADMIN VARIABLES TO DISK;select * from global_variables where variable_name LIKE 'admin-web_enabled';select @@admin-web_enabled;lsof -i:6080-- 浏览器访问https://192.168.66.35:26080用户名和密码:stats:stats


3.4 配置被监控的数据库

3.4.1 向ProxySQL插入被监控数据库

-- 1、向ProxySQL插入被监控数据库select * from mysql_servers;insert into main.mysql_servers(hostgroup_id,hostname,port) values(10,'192.168.68.131',3306);insert into main.mysql_servers(hostgroup_id,hostname,port) values(10,'192.168.68.132',3306);insert into main.mysql_servers(hostgroup_id,hostname,port) values(10,'192.168.68.133',3306);load mysql servers to runtime;save mysql servers to disk;select * from mysql_servers;MySQL [(none)]> select * from mysql_servers;+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+| hostgroup_id | hostname       | port | gtid_port | status | weight | compression | max_connections | max_replication_lag | use_ssl | max_latency_ms | comment |+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+| 10           | 192.168.68.131 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         || 10           | 192.168.68.132 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         || 10           | 192.168.68.133 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         |+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+3 rows in set (0.07 sec)


3.4.2 在所有被监控MySQL服务器上创建监控帐户

-- 2、在所有被监控MySQL服务器上创建帐户,注意:新版本中,这里的密码必须为monitor,可参考配置文件/etc/proxysql.cnfmysql -uroot -plhr -h192.168.66.35 -P33131create user 'monitor'@'%' IDENTIFIED BY 'monitor';GRANT all privileges ON *.* TO 'monitor'@'%' with grant option;select user,host from mysql.user;mysql> select user,host from mysql.user;+---------------+--------------+| user          | host         |+---------------+--------------+| mha           | %            || monitor       | %            || repl          | %            || root          | %            || mysql.session | localhost    || mysql.sys     | localhost    || root          | localhost    |+---------------+--------------+7 rows in set (0.00 sec)


3.4.3 在所有被监控MySQL服务器上创建对外访问账户

-- 3、 在所有被监控MySQL服务器上创建对外访问账户:create user 'wr'@'%' IDENTIFIED BY 'lhr';GRANT all privileges ON *.* TO 'wr'@'%' with grant option; -- 配置到ProxySQL中insert into mysql_users(username,password,default_hostgroup) values('wr','lhr',10);update mysql_users set transaction_persistent=1 where username='wr';load mysql users to runtime;save mysql users to disk;select * from mysql_users;MySQL [(none)]> select * from mysql_users;+----------+----------+--------+---------+-------------------+----------------+---------------+------------------------+--------------+---------+----------+-----------------+---------+| username | password | active | use_ssl | default_hostgroup | default_schema | schema_locked | transaction_persistent | fast_forward | backend | frontend | max_connections | comment |+----------+----------+--------+---------+-------------------+----------------+---------------+------------------------+--------------+---------+----------+-----------------+---------+| wr       | lhr      | 1      | 0       | 10                | NULL           | 0             | 1                      | 0            | 1       | 1        | 10000           |         |+----------+----------+--------+---------+-------------------+----------------+---------------+------------------------+--------------+---------+----------+-----------------+---------+1 row in set (0.05 sec)


3.4.4 配置监控

-- 4、在ProxySQL端执行下列SQL语句:set mysql-monitor_username='monitor';set mysql-monitor_password='monitor';load mysql servers to runtime;save mysql servers to disk;select * from global_variables where variable_name in('mysql-monitor_username','mysql-monitor_password');+------------------------+----------------+| variable_name          | variable_value |+------------------------+----------------+| mysql-monitor_password | monitor        || mysql-monitor_username | monitor        |+------------------------+----------------+2 rows in set (0.05 sec)-- 检查连接到MySQL的日志select * from monitor.mysql_server_ping_log order by time_start_us desc limit 6;select * from monitor.mysql_server_connect_log order by time_start_us desc limit 6;MySQL [(none)]> select * from monitor.mysql_server_ping_log order by time_start_us desc limit 6;+----------------+------+------------------+----------------------+------------+| hostname       | port | time_start_us    | ping_success_time_us | ping_error |+----------------+------+------------------+----------------------+------------+| 192.168.68.132 | 3306 | 1614050308827202 | 252                  | NULL       || 192.168.68.133 | 3306 | 1614050308716530 | 370                  | NULL       || 192.168.68.131 | 3306 | 1614050308605853 | 542                  | NULL       || 192.168.68.131 | 3306 | 1614050298778908 | 334                  | NULL       || 192.168.68.133 | 3306 | 1614050298690947 | 297                  | NULL       || 192.168.68.132 | 3306 | 1614050298605725 | 344                  | NULL       |+----------------+------+------------------+----------------------+------------+6 rows in set (0.06 sec)MySQL [(none)]> select * from monitor.mysql_server_connect_log order by time_start_us desc limit 6;+----------------+------+------------------+-------------------------+---------------+| hostname       | port | time_start_us    | connect_success_time_us | connect_error |+----------------+------+------------------+-------------------------+---------------+| 192.168.68.131 | 3306 | 1614050285481316 | 1173                    | NULL          || 192.168.68.133 | 3306 | 1614050284894846 | 1008                    | NULL          || 192.168.68.132 | 3306 | 1614050284309124 | 970                     | NULL          || 192.168.68.131 | 3306 | 1614050225194575 | 1108                    | NULL          || 192.168.68.133 | 3306 | 1614050224751771 | 987                     | NULL          || 192.168.68.132 | 3306 | 1614050224309026 | 1294                    | NULL          |+----------------+------+------------------+-------------------------+---------------+6 rows in set (0.05 sec)


3.4.5 配置MySQL主机组

-- 5、实验使用10作为写入组,20作为读取组。show create table mysql_replication_hostgroups\G;writer_hostgroup 写入组的编号reader_hostgroup 读取组的编号-- 注意:需要配置从库的read_only=1show variables like 'read_only';set global read_only=1;insert into mysql_replication_hostgroups(writer_hostgroup,reader_hostgroup,comment) values(10,20,'proxy');load mysql servers to runtime;save mysql servers to disk;select * from mysql_replication_hostgroups;select * from mysql_server_read_only_log  order by time_start_us desc limit  3;select * from mysql_servers;MySQL [(none)]> select * from mysql_replication_hostgroups;+------------------+------------------+------------+---------+| writer_hostgroup | reader_hostgroup | check_type | comment |+------------------+------------------+------------+---------+| 10               | 20               | read_only  | proxy   |+------------------+------------------+------------+---------+1 row in set (0.05 sec)MySQL [(none)]> select * from mysql_server_read_only_log  order by time_start_us desc limit  3;+----------------+------+------------------+-----------------+-----------+-------+| hostname       | port | time_start_us    | success_time_us | read_only | error |+----------------+------+------------------+-----------------+-----------+-------+| 192.168.68.133 | 3306 | 1614050367153351 | 611             | 1         | NULL  || 192.168.68.131 | 3306 | 1614050367136396 | 490             | 0         | NULL  || 192.168.68.132 | 3306 | 1614050367119511 | 531             | 1         | NULL  |+----------------+------+------------------+-----------------+-----------+-------+3 rows in set (0.05 sec)MySQL [(none)]> select * from mysql_servers;+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+| hostgroup_id | hostname       | port | gtid_port | status | weight | compression | max_connections | max_replication_lag | use_ssl | max_latency_ms | comment |+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+| 10           | 192.168.68.131 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         || 20           | 192.168.68.132 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         || 20           | 192.168.68.133 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         |+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+3 rows in set (0.05 sec)


注意,此时mysql_servers表中的hostgroup_id值已发生变化。

3.4.6 配置读写分离策略

-- 6、配置读写分离策略insert into mysql_query_rules(active,match_pattern,destination_hostgroup,apply) values(1,'^SELECT.*FOR UPDATE$',10,1);insert into mysql_query_rules(active,match_pattern,destination_hostgroup,apply) values(1,'^SELECT',20,1);LOAD MYSQL QUERY RULES TO RUNTIME;SAVE MYSQL QUERY RULES TO DISK;-- 配置查询select的请求转发到hostgroup_id=2组上(读组)-- 针对select * from table_name  for update这样的修改语句,我们是需要将请求转到写组,也就是hostgroup_id=1-- 对于其它没有被规则匹配的请求全部转发到默认的组(mysql_users表中default_hostgroup)select * from  mysql_query_rules;select username,password,default_hostgroup from mysql_users;MySQL [(none)]> select * from  mysql_query_rules;+---------+--------+----------+------------+--------+-------------+------------+------------+--------+--------------+----------------------+----------------------+--------------+---------+-----------------+-----------------------+-----------+--------------------+---------------+-----------+---------+---------+-------+-------------------+----------------+------------------+-----------+--------+-------------+-----------+---------------------+-----+-------+---------+| rule_id | active | username | schemaname | flagIN | client_addr | proxy_addr | proxy_port | digest | match_digest | match_pattern        | negate_match_pattern | re_modifiers | flagOUT | replace_pattern | destination_hostgroup | cache_ttl | cache_empty_result | cache_timeout | reconnect | timeout | retries | delay | next_query_flagIN | mirror_flagOUT | mirror_hostgroup | error_msg | OK_msg | sticky_conn | multiplex | gtid_from_hostgroup | log | apply | comment |+---------+--------+----------+------------+--------+-------------+------------+------------+--------+--------------+----------------------+----------------------+--------------+---------+-----------------+-----------------------+-----------+--------------------+---------------+-----------+---------+---------+-------+-------------------+----------------+------------------+-----------+--------+-------------+-----------+---------------------+-----+-------+---------+| 1       | 1      | NULL     | NULL       | 0      | NULL        | NULL       | NULL       | NULL   | NULL         | ^SELECT.*FOR UPDATE$ | 0                    | CASELESS     | NULL    | NULL            | 10                    | NULL      | NULL               | NULL          | NULL      | NULL    | NULL    | NULL  | NULL              | NULL           | NULL             | NULL      | NULL   | NULL        | NULL      | NULL                | NULL | 1     | NULL    || 2       | 1      | NULL     | NULL       | 0      | NULL        | NULL       | NULL       | NULL   | NULL         | ^SELECT              | 0                    | CASELESS     | NULL    | NULL            | 20                    | NULL      | NULL               | NULL          | NULL      | NULL    | NULL    | NULL  | NULL              | NULL           | NULL             | NULL      | NULL   | NULL        | NULL      | NULL                | NULL | 1     | NULL    |+---------+--------+----------+------------+--------+-------------+------------+------------+--------+--------------+----------------------+----------------------+--------------+---------+-----------------+-----------------------+-----------+--------------------+---------------+-----------+---------+---------+-------+-------------------+----------------+------------------+-----------+--------+-------------+-----------+---------------------+-----+-------+---------+2 rows in set (0.05 sec)MySQL [(none)]> select username,password,default_hostgroup from mysql_users;+----------+----------+-------------------+| username | password | default_hostgroup |+----------+----------+-------------------+| wr       | lhr      | 10                |+----------+----------+-------------------+1 row in set (0.05 sec)


至此,ProxySQL读写分离和负载均衡已配置完成,接下来我们进行测试。

四、测试读负载均衡

[root@docker35 ~]# for i in $(seq 1 10); do  mysql -uwr -plhr -h192.168.68.136 -P6033 -e 'select @@server_id;'; done | egrep '[0-9]'mysql: [Warning] Using a password on the command line interface can be insecure.573306133mysql: [Warning] Using a password on the command line interface can be insecure.573306132mysql: [Warning] Using a password on the command line interface can be insecure.573306132mysql: [Warning] Using a password on the command line interface can be insecure.573306132mysql: [Warning] Using a password on the command line interface can be insecure.573306133mysql: [Warning] Using a password on the command line interface can be insecure.573306133mysql: [Warning] Using a password on the command line interface can be insecure.573306133mysql: [Warning] Using a password on the command line interface can be insecure.573306132mysql: [Warning] Using a password on the command line interface can be insecure.573306132mysql: [Warning] Using a password on the command line interface can be insecure.573306132MySQL [(none)]> SELECT * FROM stats.stats_mysql_connection_pool;+-----------+----------------+----------+--------+----------+----------+--------+---------+-------------+---------+-------------------+-----------------+-----------------+------------+| hostgroup | srv_host       | srv_port | status | ConnUsed | ConnFree | ConnOK | ConnERR | MaxConnUsed | Queries | Queries_GTID_sync | Bytes_data_sent | Bytes_data_recv | Latency_us |+-----------+----------------+----------+--------+----------+----------+--------+---------+-------------+---------+-------------------+-----------------+-----------------+------------+| 10        | 192.168.68.131 | 3306     | ONLINE | 0        | 0        | 0      | 0       | 0           | 0       | 0                 | 0               | 0               | 323        || 20        | 192.168.68.132 | 3306     | ONLINE | 0        | 1        | 1      | 0       | 1           | 6       | 0                 | 108             | 84              | 280        || 20        | 192.168.68.133 | 3306     | ONLINE | 0        | 1        | 1      | 0       | 1           | 4       | 0                 | 72              | 56              | 390        |+-----------+----------------+----------+--------+----------+----------+--------+---------+-------------+---------+-------------------+-----------------+-----------------+------------+3 rows in set (0.06 sec)-- 可以看到Queries列分配到132和133的从库上。-- 接下来使用mysqlslap来做压测[root@docker35 ~]# [root@docker35 ~]# mysqlslap -uwr -plhr -h192.168.68.136 -P6033  --create-schema=lhrmysqlslap  --auto-generate-sql --auto-generate-sql-load-type=read --number-of-queries=100000 mysqlslap: [Warning] Using a password on the command line interface can be insecure.Benchmark        Average number of seconds to run all queries: 104.757 seconds        Minimum number of seconds to run all queries: 104.757 seconds        Maximum number of seconds to run all queries: 104.757 seconds        Number of clients running queries: 1Average number of queries per client: 100000MySQL [(none)]> SELECT * FROM stats_mysql_commands_counters WHERE Total_cnt;+-----------------+---------------+-----------+-----------+-----------+---------+---------+----------+----------+-----------+-----------+--------+--------+---------+----------+| Command         | Total_Time_us | Total_cnt | cnt_100us | cnt_500us | cnt_1ms | cnt_5ms | cnt_10ms | cnt_50ms | cnt_100ms | cnt_500ms | cnt_1s | cnt_5s | cnt_10s | cnt_INFs |+-----------------+---------------+-----------+-----------+-----------+---------+---------+----------+----------+-----------+-----------+--------+--------+---------+----------+| CREATE_DATABASE | 90942         | 3         | 0         | 0         | 0       | 2       | 0        | 0        | 1         | 0         | 0      | 0      | 0       | 0        || CREATE_TABLE    | 67954         | 3         | 0         | 0         | 0       | 0       | 0        | 3        | 0         | 0         | 0      | 0      | 0       | 0        || INSERT          | 11337671      | 113       | 0         | 0         | 0       | 69      | 27       | 14       | 1         | 0         | 1      | 0      | 0       | 1        || SELECT          | 15299552      | 22293     | 263       | 1588      | 18947   | 1453    | 29       | 10       | 2         | 1         | 0      | 0      | 0       | 0        || SHOW            | 56308         | 1         | 0         | 0         | 0       | 0       | 0        | 0        | 1         | 0         | 0      | 0      | 0       | 0        || UNKNOWN         | 131355        | 2         | 0         | 0         | 0       | 1       | 0        | 0        | 0         | 1         | 0      | 0      | 0       | 0        |+-----------------+---------------+-----------+-----------+-----------+---------+---------+----------+----------+-----------+-----------+--------+--------+---------+----------+6 rows in set (0.11 sec)MySQL [(none)]> SELECT * FROM stats_mysql_commands_counters WHERE Total_cnt;+-----------------+---------------+-----------+-----------+-----------+---------+---------+----------+----------+-----------+-----------+--------+--------+---------+----------+| Command         | Total_Time_us | Total_cnt | cnt_100us | cnt_500us | cnt_1ms | cnt_5ms | cnt_10ms | cnt_50ms | cnt_100ms | cnt_500ms | cnt_1s | cnt_5s | cnt_10s | cnt_INFs |+-----------------+---------------+-----------+-----------+-----------+---------+---------+----------+----------+-----------+-----------+--------+--------+---------+----------+| CREATE_DATABASE | 90942         | 3         | 0         | 0         | 0       | 2       | 0        | 0        | 1         | 0         | 0      | 0      | 0       | 0        || CREATE_TABLE    | 67954         | 3         | 0         | 0         | 0       | 0       | 0        | 3        | 0         | 0         | 0      | 0      | 0       | 0        || INSERT          | 11337671      | 113       | 0         | 0         | 0       | 69      | 27       | 14       | 1         | 0         | 1      | 0      | 0       | 1        || SELECT          | 16494138      | 24050     | 263       | 1744      | 20488   | 1512    | 29       | 10       | 3         | 1         | 0      | 0      | 0       | 0        || SHOW            | 56308         | 1         | 0         | 0         | 0       | 0       | 0        | 0        | 1         | 0         | 0      | 0      | 0       | 0        || UNKNOWN         | 131355        | 2         | 0         | 0         | 0       | 1       | 0        | 0        | 0         | 1         | 0      | 0      | 0       | 0        |+-----------------+---------------+-----------+-----------+-----------+---------+---------+----------+----------+-----------+-----------+--------+--------+---------+----------+6 rows in set (0.07 sec)MySQL [(none)]>  SELECT * FROM stats.stats_mysql_connection_pool;+-----------+----------------+----------+--------+----------+----------+--------+---------+-------------+---------+-------------------+-----------------+-----------------+------------+| hostgroup | srv_host       | srv_port | status | ConnUsed | ConnFree | ConnOK | ConnERR | MaxConnUsed | Queries | Queries_GTID_sync | Bytes_data_sent | Bytes_data_recv | Latency_us |+-----------+----------------+----------+--------+----------+----------+--------+---------+-------------+---------+-------------------+-----------------+-----------------+------------+| 10        | 192.168.68.131 | 3306     | ONLINE | 0        | 1        | 1      | 0       | 1           | 107     | 0                 | 16464           | 92              | 277        || 20        | 192.168.68.132 | 3306     | ONLINE | 0        | 1        | 1      | 0       | 1           | 24052   | 0                 | 768920          | 335907539       | 306        || 20        | 192.168.68.133 | 3306     | ONLINE | 1        | 0        | 1      | 0       | 1           | 24061   | 0                 | 769119          | 335923167       | 381        |+-----------+----------------+----------+--------+----------+----------+--------+---------+-------------+---------+-------------------+-----------------+-----------------+------------+3 rows in set (0.39 sec)MySQL [(none)]> SELECT hostgroup,schemaname ,  username ,  digest , sum_time, count_star, substr(digest_text,1,60) FROM stats_mysql_query_digest where schemaname='lhrmysqlslap' ORDER BY sum_time DESC;+-----------+--------------+----------+--------------------+----------+------------+---------------------------------------------------------+| hostgroup | schemaname   | username | digest             | sum_time | count_star | substr(digest_text,1,60)                                |+-----------+--------------+----------+--------------------+----------+------------+---------------------------------------------------------+| 20        | lhrmysqlslap | wr       | 0x91B125A563AED6EB | 65166273 | 100000     | SELECT intcol1,charcol1 FROM t1                         || 10        | lhrmysqlslap | wr       | 0xBCFD962F4A5FFA4B | 1134087  | 99         | INSERT INTO t1 VALUES (?,?)                             || 10        | lhrmysqlslap | wr       | 0x50E8C33778819FCD | 23904    | 1          | CREATE TABLE `t1` (intcol1 INT(?) ,charcol1 VARCHAR(?)) || 10        | lhrmysqlslap | wr       | 0x41B7F05694EF426F | 21351    | 1          | DROP SCHEMA IF EXISTS `lhrmysqlslap`                    |+-----------+--------------+----------+--------------------+----------+------------+---------------------------------------------------------+4 rows in set (0.08 sec)


可以看出,负载被分别被分配到132和133上。

五、测试读写分离

-- 测试读写分离mysql -uwr -plhr -h192.168.66.35 -P26033create database test_proxysql;use test_proxysql;create table test_tables(name varchar(20),age int(4));insert into test_tables values('lhr','33');select * from test_tables;select * from stats_mysql_query_digest;MySQL [(none)]> SELECT * FROM stats.stats_mysql_connection_pool;+-----------+----------------+----------+--------+----------+----------+--------+---------+-------------+---------+-------------------+-----------------+-----------------+------------+| hostgroup | srv_host       | srv_port | status | ConnUsed | ConnFree | ConnOK | ConnERR | MaxConnUsed | Queries | Queries_GTID_sync | Bytes_data_sent | Bytes_data_recv | Latency_us |+-----------+----------------+----------+--------+----------+----------+--------+---------+-------------+---------+-------------------+-----------------+-----------------+------------+| 10        | 192.168.68.131 | 3306     | ONLINE | 0        | 1        | 1      | 0       | 1           | 5       | 0                 | 165             | 92              | 369        || 20        | 192.168.68.132 | 3306     | ONLINE | 0        | 1        | 1      | 0       | 1           | 8       | 0                 | 142             | 130             | 301        || 20        | 192.168.68.133 | 3306     | ONLINE | 0        | 1        | 1      | 0       | 1           | 5       | 0                 | 97              | 67              | 341        |+-----------+----------------+----------+--------+----------+----------+--------+---------+-------------+---------+-------------------+-----------------+-----------------+------------+3 rows in set (0.07 sec)-- 可以看到写操作被分配到131主机上。-- 其它表的统计信息SELECT * FROM stats.stats_mysql_connection_pool;SELECT * FROM stats_mysql_commands_counters WHERE Total_cnt;SELECT * FROM stats_mysql_query_digest ORDER BY sum_time DESC;SELECT hostgroup,schemaname ,  username ,  digest , sum_time, count_star, substr(digest_text,1,60) FROM stats_mysql_query_digest where schemaname='lhrmysqlslap' ORDER BY sum_time DESC;-- 清空数据,查询stats_mysql_query_digest_reset表时,会自动从stats_mysql_query_digest中临时抓取数据,并truncate。SELECT * FROM stats_mysql_query_digest_reset LIMIT 1;-- 使用sysbench继续读写分离测试-- 配置MySQL最大连接数:set global max_connections=1000;sysbench /usr/share/sysbench/oltp_common.lua --time=300 --mysql-host=192.168.68.136 --mysql-port=6033 --mysql-user=wr --mysql-password=lhr --mysql-db=sbtest --table-size=100000 --tables=20 --threads=100 --events=999999999   preparesysbench /usr/share/sysbench/oltp_read_write.lua --time=300 --mysql-host=192.168.68.136 --mysql-port=6033 --mysql-user=wr --mysql-password=lhr --mysql-db=sbtest --table-size=10000 --tables=20 --threads=100 --events=999999999  --report-interval=10 --db-ps-mode=disable --forced-shutdown=1 runsysbench /usr/share/sysbench/oltp_read_only.lua --time=300 --mysql-host=192.168.68.136 --mysql-port=6033 --mysql-user=wr --mysql-password=lhr --mysql-db=sbtest --table-size=10000 --tables=20 --threads=100 --events=999999999  --report-interval=10 --db-ps-mode=disable --forced-shutdown=1 run-- 查询读写分离的监控数据MySQL [(none)]> SELECT hostgroup,schemaname ,  username ,  digest , sum_time, count_star, substr(digest_text,1,60) FROM stats_mysql_query_digest where schemaname='sbtest' ORDER BY sum_time DESC;+-----------+------------+----------+--------------------+----------+------------+--------------------------------------------------------------+| hostgroup | schemaname | username | digest             | sum_time | count_star | substr(digest_text,1,60)                                     |+-----------+------------+----------+--------------------+----------+------------+--------------------------------------------------------------+| 10        | sbtest     | wr       | 0x76607360EFEAC208 | 84059739 | 37         | INSERT INTO sbtest14(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0x02834C12D1767CBF | 81396186 | 37         | INSERT INTO sbtest19(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0xF175422CAEB5052B | 80172428 | 37         | INSERT INTO sbtest5(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0xD264943870461B52 | 78250552 | 37         | INSERT INTO sbtest9(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0x2F9D0B4C12C50457 | 75761155 | 37         | INSERT INTO sbtest13(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0x0482F61CCAD957B8 | 74841767 | 37         | INSERT INTO sbtest16(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0x2BA639A0C593250B | 74744554 | 37         | INSERT INTO sbtest20(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0x131C045B3F7FC633 | 74710835 | 37         | INSERT INTO sbtest12(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0x9677C76C4DF88251 | 74446715 | 37         | INSERT INTO sbtest6(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0x36760936592E8530 | 74289312 | 37         | INSERT INTO sbtest2(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0xEFBA5FC0C8412297 | 72425766 | 37         | INSERT INTO sbtest18(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0xDF47484FFE945EDD | 70572836 | 37         | INSERT INTO sbtest8(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0x27D376AC1710C980 | 66516942 | 37         | INSERT INTO sbtest11(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0x4D433FDEA1B945C1 | 65829143 | 37         | INSERT INTO sbtest10(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0xFF6D9C6F32545951 | 65739929 | 37         | INSERT INTO sbtest1(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0x772AE6B66160E91E | 65271284 | 37         | INSERT INTO sbtest7(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0x4F8D29910113CAE6 | 64822306 | 37         | INSERT INTO sbtest15(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0x7502AE74F4B0113E | 64133812 | 37         | INSERT INTO sbtest4(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0x4B083B064FF4F9D9 | 61931719 | 37         | INSERT INTO sbtest17(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0x3C6D29F861CD6572 | 60387247 | 37         | INSERT INTO sbtest3(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0x8965AD5701787BC0 | 33638613 | 1          | CREATE INDEX k_3 ON sbtest3(k)                               || 10        | sbtest     | wr       | 0xB12065B0D79AC0DD | 33288092 | 1          | CREATE INDEX k_17 ON sbtest17(k)                             || 10        | sbtest     | wr       | 0xC46D61BAA605D7D3 | 32926000 | 1          | CREATE INDEX k_1 ON sbtest1(k)                               || 10        | sbtest     | wr       | 0x2BF8C8E7084502D5 | 32904517 | 1          | CREATE INDEX k_7 ON sbtest7(k)                               || 10        | sbtest     | wr       | 0x6F22CFB8FF512B02 | 32625659 | 1          | CREATE INDEX k_4 ON sbtest4(k)                               || 10        | sbtest     | wr       | 0x14A86D647A425E21 | 31622991 | 1          | CREATE INDEX k_15 ON sbtest15(k)                             || 10        | sbtest     | wr       | 0xF9D03F580356BB68 | 31573312 | 1          | CREATE INDEX k_11 ON sbtest11(k)                             || 10        | sbtest     | wr       | 0xA43F49E4ADA080FB | 31346640 | 1          | CREATE INDEX k_10 ON sbtest10(k)                             || 10        | sbtest     | wr       | 0x922B9C1E888EB4C9 | 29435206 | 1          | CREATE INDEX k_8 ON sbtest8(k)                               || 10        | sbtest     | wr       | 0x409A0DA0B5B6EEF9 | 28482669 | 1          | CREATE INDEX k_2 ON sbtest2(k)                               || 10        | sbtest     | wr       | 0xE4300864715B3688 | 28000903 | 1          | CREATE INDEX k_20 ON sbtest20(k)                             || 10        | sbtest     | wr       | 0x4DE9E56B5EF734F2 | 27918352 | 1          | CREATE INDEX k_6 ON sbtest6(k)                               || 10        | sbtest     | wr       | 0x82CE0656182236D8 | 27909444 | 1          | CREATE INDEX k_12 ON sbtest12(k)                             || 10        | sbtest     | wr       | 0xFE8EAD5ACC9FEEDE | 27273704 | 1          | CREATE INDEX k_18 ON sbtest18(k)                             || 10        | sbtest     | wr       | 0x35A492B2AB47EB41 | 26754664 | 1          | CREATE INDEX k_16 ON sbtest16(k)                             || 10        | sbtest     | wr       | 0xF5B52253F5260086 | 21401807 | 1          | CREATE INDEX k_9 ON sbtest9(k)                               || 10        | sbtest     | wr       | 0xA1B769A0F4E9637C | 21271034 | 1          | CREATE INDEX k_13 ON sbtest13(k)                             || 10        | sbtest     | wr       | 0xFBE6F4A5E871D069 | 21202873 | 1          | CREATE INDEX k_5 ON sbtest5(k)                               || 10        | sbtest     | wr       | 0x004D21922AA0CC4C | 19075137 | 1          | CREATE INDEX k_19 ON sbtest19(k)                             || 10        | sbtest     | wr       | 0x6057175824222B09 | 18110480 | 1          | CREATE INDEX k_14 ON sbtest14(k)                             || 10        | sbtest     | wr       | 0x5143272478FE391F | 5837193  | 1          | INSERT INTO sbtest13(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0xD9E2214392AB9E0D | 2791511  | 1          | INSERT INTO sbtest9(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0x4AC5841F976F5A1A | 1686763  | 2          | CREATE TABLE sbtest5( id INTEGER NOT NULL AUTO_INCREMENT, k  || 10        | sbtest     | wr       | 0x0E320961406063D2 | 1608309  | 1          | INSERT INTO sbtest3(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0x1886E479A84E6EF3 | 1364378  | 1          | INSERT INTO sbtest19(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0xDC0701A550CF81E1 | 1315637  | 2          | CREATE TABLE sbtest14( id INTEGER NOT NULL AUTO_INCREMENT, k || 10        | sbtest     | wr       | 0xDE42F97C93E70D2F | 1213739  | 2          | CREATE TABLE sbtest9( id INTEGER NOT NULL AUTO_INCREMENT, k  || 10        | sbtest     | wr       | 0x69426F34842FCBCB | 1167716  | 1          | INSERT INTO sbtest16(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0x3455DC796FFE13FF | 1096589  | 2          | CREATE TABLE sbtest19( id INTEGER NOT NULL AUTO_INCREMENT, k || 10        | sbtest     | wr       | 0xCB672EA01B2BCC66 | 1059624  | 2          | CREATE TABLE sbtest18( id INTEGER NOT NULL AUTO_INCREMENT, k || 10        | sbtest     | wr       | 0x68A680665F3A4F7F | 1046881  | 1          | INSERT INTO sbtest18(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0x988823E25FA87160 | 1008422  | 2          | CREATE TABLE sbtest7( id INTEGER NOT NULL AUTO_INCREMENT, k  || 10        | sbtest     | wr       | 0x630131CEA842636C | 941575   | 1          | INSERT INTO sbtest17(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0xCFABCFBA3338DFE6 | 883756   | 2          | CREATE TABLE sbtest13( id INTEGER NOT NULL AUTO_INCREMENT, k || 10        | sbtest     | wr       | 0x38C679BD1A2B850D | 800858   | 2          | CREATE TABLE sbtest20( id INTEGER NOT NULL AUTO_INCREMENT, k || 10        | sbtest     | wr       | 0xA8C074E066D84361 | 745750   | 2          | CREATE TABLE sbtest2( id INTEGER NOT NULL AUTO_INCREMENT, k  || 10        | sbtest     | wr       | 0x644F2A01D1AEE6F0 | 618114   | 1          | INSERT INTO sbtest8(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0xA6A432C624F814B1 | 588508   | 1          | INSERT INTO sbtest7(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0xAC072AB4E74DCA04 | 587709   | 1          | INSERT INTO sbtest1(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0x6A5DF2EE9E492E4E | 544548   | 1          | INSERT INTO sbtest4(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0xB483ABDF2ACB307D | 523796   | 2          | CREATE TABLE sbtest16( id INTEGER NOT NULL AUTO_INCREMENT, k || 10        | sbtest     | wr       | 0xDD3B26A209175EF7 | 520238   | 1          | INSERT INTO sbtest10(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0x1061831367EE99C7 | 453881   | 1          | INSERT INTO sbtest14(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0x7F93BDE97051D79A | 440020   | 2          | CREATE TABLE sbtest6( id INTEGER NOT NULL AUTO_INCREMENT, k  || 10        | sbtest     | wr       | 0x806A9CCB80119BE2 | 417349   | 2          | CREATE TABLE sbtest1( id INTEGER NOT NULL AUTO_INCREMENT, k  || 10        | sbtest     | wr       | 0x43CA6E3D0072BCBE | 402073   | 2          | CREATE TABLE sbtest12( id INTEGER NOT NULL AUTO_INCREMENT, k || 10        | sbtest     | wr       | 0xA204975AD230A23B | 400655   | 2          | CREATE TABLE sbtest8( id INTEGER NOT NULL AUTO_INCREMENT, k  || 10        | sbtest     | wr       | 0x11E6BAC23207DD78 | 381162   | 1          | INSERT INTO sbtest2(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0x42B1839D8797EDCB | 379488   | 1          | INSERT INTO sbtest12(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0x583CBA28271C4365 | 357866   | 2          | CREATE TABLE sbtest4( id INTEGER NOT NULL AUTO_INCREMENT, k  || 10        | sbtest     | wr       | 0x6ACC6500F6722004 | 340867   | 2          | CREATE TABLE sbtest15( id INTEGER NOT NULL AUTO_INCREMENT, k || 10        | sbtest     | wr       | 0x5408EB0F722B3B6F | 324340   | 2          | CREATE TABLE sbtest10( id INTEGER NOT NULL AUTO_INCREMENT, k || 10        | sbtest     | wr       | 0xCD3FA57950F3E362 | 293837   | 1          | INSERT INTO sbtest5(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0x4196561D18B78360 | 285839   | 1          | INSERT INTO sbtest20(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0xE7DCF83C81EDEA8D | 265476   | 2          | CREATE TABLE sbtest11( id INTEGER NOT NULL AUTO_INCREMENT, k || 10        | sbtest     | wr       | 0xFA3A3817BE19ABB3 | 250778   | 2          | CREATE TABLE sbtest3( id INTEGER NOT NULL AUTO_INCREMENT, k  || 10        | sbtest     | wr       | 0x6B8F384E1250D83C | 247460   | 2          | CREATE TABLE sbtest17( id INTEGER NOT NULL AUTO_INCREMENT, k || 10        | sbtest     | wr       | 0x26E4B187688CC6BE | 218255   | 1          | INSERT INTO sbtest6(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(?, || 10        | sbtest     | wr       | 0x9E18B2E0420BA351 | 200861   | 1          | INSERT INTO sbtest15(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? || 10        | sbtest     | wr       | 0xAB7D4ACFF578DC61 | 199109   | 1          | INSERT INTO sbtest11(k, c, pad) VALUES(?, ?, ?),(?, ?, ?),(? |+-----------+------------+----------+--------------------+----------+------------+--------------------------------------------------------------+80 rows in set (0.71 sec)  MySQL [(none)]> SELECT * FROM stats_mysql_commands_counters WHERE Total_cnt;+-----------------+---------------+-----------+-----------+-----------+---------+---------+----------+----------+-----------+-----------+--------+--------+---------+----------+| Command         | Total_Time_us | Total_cnt | cnt_100us | cnt_500us | cnt_1ms | cnt_5ms | cnt_10ms | cnt_50ms | cnt_100ms | cnt_500ms | cnt_1s | cnt_5s | cnt_10s | cnt_INFs |+-----------------+---------------+-----------+-----------+-----------+---------+---------+----------+----------+-----------+-----------+--------+--------+---------+----------+| BEGIN           | 2793013652    | 15681     | 95        | 888       | 1864    | 5806    | 2671     | 2882     | 447       | 266       | 33     | 533    | 190     | 6        || COMMIT          | 4360624460    | 15575     | 3         | 31        | 58      | 191     | 138      | 1031     | 2337      | 9827      | 1369   | 590    | 0       | 0        || CREATE_DATABASE | 99871         | 4         | 0         | 0         | 0       | 2       | 1        | 0        | 1         | 0         | 0      | 0      | 0       | 0        || CREATE_INDEX    | 556762097     | 20        | 0         | 0         | 0       | 0       | 0        | 0        | 0         | 0         | 0      | 0      | 0       | 20       || CREATE_TABLE    | 13849772      | 43        | 0         | 0         | 1       | 0       | 0        | 21       | 1         | 11        | 4      | 5      | 0       | 0        || DELETE          | 603363949     | 14940     | 45        | 197       | 1637    | 5575    | 2424     | 2997     | 771       | 1081      | 136    | 77     | 0       | 0        || INSERT          | 1734742355    | 15812     | 38        | 339       | 1872    | 6251    | 2484     | 2887     | 586       | 590       | 138    | 605    | 21      | 1        || SELECT          | 3704563235    | 319925    | 965       | 12937     | 109961  | 96434   | 40564    | 44484    | 7667      | 6460      | 376    | 77     | 0       | 0        || UPDATE          | 1788596841    | 29900     | 45        | 166       | 2336    | 9589    | 4487     | 6847     | 2123      | 3682      | 445    | 180    | 0       | 0        || SHOW            | 58391         | 2         | 0         | 0         | 0       | 1       | 0        | 0        | 1         | 0         | 0      | 0      | 0       | 0        || UNKNOWN         | 152706        | 3         | 0         | 0         | 0       | 1       | 0        | 1        | 0         | 1         | 0      | 0      | 0       | 0        |+-----------------+---------------+-----------+-----------+-----------+---------+---------+----------+----------+-----------+-----------+--------+--------+---------+----------+11 rows in set (0.11 sec)


可以观察到读写分离的数据。

六、故障切换

在Manager节点检查SSH、复制及MHA的状态。

docker exec -it MHA-LHR-Monitor-ip134 bashmasterha_check_ssh --conf=/etc/mha/mha.cnfmasterha_check_repl --conf=/etc/mha/mha.cnfmasterha_check_status --conf=/etc/mha/mha.cnf-- 启动MHA监控进程nohup masterha_manager --conf=/etc/mha/mha.cnf  --ignore_last_failover < /dev/null > /usr/local/mha/manager_start.log 2>&1 &--关闭MHA监控进程masterha_stop --conf=/etc/mha/mha.cnf[root@MHA-LHR-Monitor-ip134 /]# masterha_check_status --conf=/etc/mha/mha.cnfmha (pid:3738) is running(0:PING_OK), master:192.168.68.131


接下来,宕掉主库,继续观察ProxySQL的情况:

 -- 宕掉主库 docker stop MHA-LHR-Master1-ip131


MHA自动执行了故障转移,主库切换为132,并发送告警邮件:

此时,来查看ProxySQL的情况:

MySQL [(none)]> select * from mysql_servers;+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+| hostgroup_id | hostname       | port | gtid_port | status | weight | compression | max_connections | max_replication_lag | use_ssl | max_latency_ms | comment |+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+| 10           | 192.168.68.132 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         || 20           | 192.168.68.131 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         || 20           | 192.168.68.133 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         || 20           | 192.168.68.132 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         |+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+4 rows in set (0.05 sec)MySQL [(none)]> select * from runtime_mysql_servers;+--------------+----------------+------+-----------+---------+--------+-------------+-----------------+---------------------+---------+----------------+---------+| hostgroup_id | hostname       | port | gtid_port | status  | weight | compression | max_connections | max_replication_lag | use_ssl | max_latency_ms | comment |+--------------+----------------+------+-----------+---------+--------+-------------+-----------------+---------------------+---------+----------------+---------+| 10           | 192.168.68.132 | 3306 | 0         | ONLINE  | 1      | 0           | 1000            | 0                   | 0       | 0              |         || 20           | 192.168.68.131 | 3306 | 0         | SHUNNED | 1      | 0           | 1000            | 0                   | 0       | 0              |         || 20           | 192.168.68.133 | 3306 | 0         | ONLINE  | 1      | 0           | 1000            | 0                   | 0       | 0              |         || 20           | 192.168.68.132 | 3306 | 0         | ONLINE  | 1      | 0           | 1000            | 0                   | 0       | 0              |         |+--------------+----------------+------+-----------+---------+--------+-------------+-----------------+---------------------+---------+----------------+---------+4 rows in set (1.26 sec)


可以发现131已经变成SHUNNED状态,ProxySQL会避开这个主机。

此时再做压测等操作,所有负载会被分配到132和133上,此处不再测试。

接下来启动131,并以从库的身份加入原主从环境:

-- 启动131docker start MHA-LHR-Master1-ip131-- 在134的日志文件中找到恢复的语句grep "All other slaves should start replication from here" /usr/local/mha/manager_running.log-- 在131上执行恢复mysql -uroot -plhr -h192.168.68.131 -P3306CHANGE MASTER TO MASTER_HOST='192.168.68.132', MASTER_PORT=3306, MASTER_AUTO_POSITION=1,MASTER_USER='repl',MASTER_PASSWORD='lhr';start slave;show slave status \G-- 设置只读set global read_only=1;


查询ProxySQL:

MySQL [(none)]> select * from mysql_servers;+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+| hostgroup_id | hostname       | port | gtid_port | status | weight | compression | max_connections | max_replication_lag | use_ssl | max_latency_ms | comment |+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+| 10           | 192.168.68.132 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         || 20           | 192.168.68.131 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         || 20           | 192.168.68.133 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         || 20           | 192.168.68.132 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         |+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+4 rows in set (0.06 sec)


可以看到131为只读。若想让132只写,则可以删除相关记录:

MySQL [(none)]> delete from mysql_servers where hostgroup_id=20 and  hostname='192.168.68.132';Query OK, 1 row affected (0.06 sec)MySQL [(none)]> load mysql servers to runtime;Query OK, 0 rows affected (0.68 sec)MySQL [(none)]> save mysql servers to disk;Query OK, 0 rows affected (0.10 sec)MySQL [(none)]> select * from mysql_servers;+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+| hostgroup_id | hostname       | port | gtid_port | status | weight | compression | max_connections | max_replication_lag | use_ssl | max_latency_ms | comment |+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+| 10           | 192.168.68.132 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         || 20           | 192.168.68.131 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         || 20           | 192.168.68.133 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         |+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+3 rows in set (0.05 sec)MySQL [(none)]> select * from runtime_mysql_servers;+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+| hostgroup_id | hostname       | port | gtid_port | status | weight | compression | max_connections | max_replication_lag | use_ssl | max_latency_ms | comment |+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+| 10           | 192.168.68.132 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         || 20           | 192.168.68.133 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         || 20           | 192.168.68.131 | 3306 | 0         | ONLINE | 1      | 0           | 1000            | 0                   | 0       | 0              |         |+--------------+----------------+------+-----------+--------+--------+-------------+-----------------+---------------------+---------+----------------+---------+3 rows in set (0.94 sec)


可以看到132为主库,131和133为从库。Orchestrator界面:

七、界面监控结果(ProxySQL本身+PMM监控)

7.1 ProxySQL自带监控

ProxySQL监控结果:

7.2 PMM监控

监控可以使用ProxySQL本身自动的监控,也可以使用PMM来监控。PMM(Percona Monitoring and Management)是一个免费的开源平台,用于管理和监视数据库性能,在docker环境中即可运行。它可以主动管理和监控MySQL(AWS RDS MySQL、Aurora MySQL、用户自建MySQL实例)、MariaDB、MongoDB、PostgreSQL等数据库,也可以监控ProxySQL中间件,并提供了众多指标与多样告警方式。

PMM监控ProxySQL的命令如下:

pmm-admin add proxysql --username=root --password=lhr  --host=192.168.66.35 --port=26032 --service-name=proxysql-192.168.66.35-26032


PMM监控结果:

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