Mycat中间件实现Mysql主从读写分离-创新互联
环境规划：
| IP地址 | 主机名 | 角色 | 备注 |
| 10.4.132.50 | k8s01 | mycat,master | |
| 10.4.132.42 | k8s02 | slave | |
| 10.4.132.66 | k8s03 | slave |
Mycat下载地址：http://dl.mycat.io/1.6.7.3/20190828135747/Mycat-server-1.6.7.3-release-20190828135747-linux.tar.gz
Mysql下载地址： http://mirrors.163.com/mysql/Downloads/MySQL-5.7/mysql-5.7.27-linux-glibc2.12-x86_64.tar.gz
Mycal管理集群端口：[root@k8s01 conf]# mysql -h 127.0.0.1 -u root -p123456 -P 9066
Mycat数据端口：[root@k8s01 conf]# mysql -h 127.0.0.1 -u root -p123456 -P 8066
1.下载安装mysql(1台master节点和2台slave节点)
[root@k8s01 soft]# wget http://mirrors.163.com/mysql/Downloads/MySQL-5.7/mysql-5.7.27-linux-glibc2.12-x86_64.tar.gz
[root@k8s01 soft]# tar xvf mysql-5.7.27-linux-glibc2.12-x86_64.tar.gz -C /usr/local/
[root@k8s01 soft]# cd /usr/local/
[root@k8s01 local]# mv mysql-5.7.27-linux-glibc2.12-x86_64/ mysql-5.7.27
[root@k8s01 local]# chown -R root:root mysql-5.7.27/
[root@k8s01 local]# cd mysql-5.7.27/
[root@k8s01 mysql-5.7.27]# mkdir data
[root@k8s01 mysql-5.7.27]# useradd -r -M -s /bin/nologin mysql
[root@k8s01 mysql-5.7.27]# chown -R mysql:mysql data/
[root@k8s01 mysql-5.7.27]# ./bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql-5.7.27 --datadir=/usr/local/mysql-5.7.27/data
2019-11-02T04:24:41.908404Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2019-11-02T04:24:46.687678Z 0 [Warning] InnoDB: New log files created, LSN=45790
2019-11-02T04:24:47.428823Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2019-11-02T04:24:47.487404Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: b42cef88-fd28-11e9-a5cc-000c29ee86d5.
2019-11-02T04:24:47.488204Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2019-11-02T04:24:47.612739Z 1 [Note] A temporary password is generated for root@localhost: 3m;5yQ_7T#jc --登陆密码
[root@k8s01 mysql-5.7.27]# cp -a support-files/mysql.server /etc/init.d/mysqld
[root@k8s01 mysql-5.7.27]# chkconfig --add mysqld
[root@k8s01 mysql-5.7.27]# chkconfig mysqld on
[root@k8s01 mysql-5.7.27]# vim /etc/init.d/mysqld
basedir=/usr/local/mysql-5.7.27
datadir=/usr/local/mysql-5.7.27/data
[root@k8s01 mysql-5.7.27]# vim /etc/my.cnf
[mysqld]
basedir=/usr/local/mysql-5.7.27
datadir=/usr/local/mysql-5.7.27/data
socket=/tmp/mysql.sock
symbolic-links=0
server_id=10
binlog_format=ROW
max_binlog_size=2G
sync_binlog=1
binlog_cache_size=64M
log_bin=bin-log
log_bin_index=bin-index
[mysqld_safe]
log-error=/usr/local/mysql-5.7.27/data/mariadb.log
pid-file=/usr/local/mysql-5.7.27/data/mariadb.pid
[root@k8s01 mysql-5.7.27]# /etc/init.d/mysqld restart
ERROR! MySQL server PID file could not be found!
Starting MySQL.Logging to '/usr/local/mysql-5.7.27/data/mariadb.log'.
... SUCCESS!
[root@k8s01 mysql-5.7.27]# vim /etc/profile
export PATH=$PATH:/usr/local/mysql-5.7.27/bin
[root@k8s01 mysql-5.7.27]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.27
Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respectiveowners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> set password=password('System135');
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> exit
Bye
[root@k8s01 mysql-5.7.27]# mysql -u root -pSystem135
mysql: [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 6
Server version: 5.7.27 MySQL Community Server (GPL)
Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.00 sec)
mysql>
2.master节点和slave节点做主从
master节点：
[root@k8s01 mysql-5.7.27]# mysql -u root -pSystem135mysql: [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 39
Server version: 5.7.27-log MySQL Community Server (GPL)
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