MySQL HA Solution 2019(1)Master Slave on MySQL 5.7

MySQL HA Solution 2019(1)Master Slave on MySQL 5.7

Prepare machines ubuntu-master, ubuntu-dev5, ubuntu-dev6

Install MySQL with right version

> sudo apt-get update
> sudo apt-get dist-upgrade

> sudo apt install mysql-server
> sudo apt install mysql-client

In the new version, we need to find the root password from here
> sudo cat /etc/mysql/debian.cnf
# Automatically generated for Debian scripts. DO NOT TOUCH!
[client]
host     = localhost
user     = debian-sys-maint
password = ddHulNSEFzhUFvS1
socket   = /var/run/mysqld/mysqld.sock
[mysql_upgrade]
host     = localhost
user     = debian-sys-maint
password = ddHulNSEFzhUFvS1
socket   = /var/run/mysqld/mysqld.sock

Login in these server with commands
> mysql -u debian-sys-maint -pddHulNSEFzhUFvS1

Set Up Master and Slave
On Master
> sudo vi /etc/mysql/mysql.conf.d/mysqld.cnf
Comments out bind-address
# bind-address          = 127.0.0.1

Config the server-id and log file directory
server-id               = 1
log_bin                 = /var/log/mysql/mysql-bin.log

On Slave ubuntu-dev5
> sudo vi /etc/mysql/mysql.conf.d/mysqld.cnf
server-id               = 11
#bind-address           = 127.0.0.1

On Slave ubuntu-dev6
> sudo vi /etc/mysql/mysql.conf.d/mysqld.cnf
server-id               = 12
#bind-address           = 127.0.0.1

Restart Master and Slaves
> sudo /etc/init.d/mysql restart

Login on ubuntu-master and set up
> mysql> use mysql;
> grant replication slave on *.* to 'masterslave'@'ubuntu-dev5' identified by '111111';
> grant replication slave on *.* to 'masterslave'@'ubuntu-dev6' identified by '111111';

Show the master status
> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 |      788 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

The information 788 and mysql-bin.000001 are important and it will be used later.

On Slave ubuntu-dev5
> use mysql;
> change master to master_host='ubuntu-master', master_user='masterslave', master_password='111111', master_log_file='mysql-bin.000001', master_log_pos=788;
> start slave;

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: ubuntu-master
                  Master_User: masterslave
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 788
               Relay_Log_File: ubuntu-dev5-relay-bin.000002
                Relay_Log_Pos: 320
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

Do the same on ubuntu-dev6

Verify the Installation
On master
> create database sillycat;
> use sillycat;
> create table branduser(id int primary key, username char(255), age int);
> insert into branduser(id, username, age) values ( 1, "sillycat", 32);

On slave
> use sillycat;
> select * from branduser;
+----+----------+------+
| id | username | age  |
+----+----------+------+
|  1 | sillycat |   32 |
+----+----------+------+
1 row in set (0.00 sec)


References:
https://my.oschina.net/goudingcheng/blog/608490
https://www.cnblogs.com/gl-developer/p/6178608.html
https://blog.csdn.net/kobejayandy/article/details/60869530
https://blog.51cto.com/10316297/2139138
MyCat
https://blog.csdn.net/linuxlsq/article/details/52606225
https://blog.csdn.net/nxw_tsp/article/details/56277430
https://github.com/MyCATApache/Mycat-Server
https://hokkaitao.github.io/new-tool-to-solve-mysql-scalability-problems
Max
http://www.chinastor.com/yw/09263494H016.html
https://www.cnblogs.com/darren-lee/p/7591416.html
proxySQL
https://blog.51cto.com/sumongodb/2130453
https://www.cnblogs.com/zhoujinyi/p/6838685.html
https://github.com/sysown/proxysql
https://proxysql.com/





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