Mycat分布式架构-多实例准备
作者：互联网
1.1环境准备：
两台虚拟机db01和db02
每台机器创建4个mysql实例：3307 ,3308 ,3309 ,3310
1.2删除db01和db02的历史环境，使用一个全新的环境：
[root@db01 ~]# pkill mysqld [root@db01 ~]# rm -rf /data/330* [root@db01 ~]# mv /etc/my.cnf /etc/my.cnf.bak
[root@db01 ~]# ls -l /etc/my.cnf
[root@db02 ~]# pkill mysqld [root@db02 ~]# rm -rf /data/330* [root@db02 ~]# mv /etc/my.cnf /etc/my.cnf.bak
[root@db02 ~]# ls -l /etc/my.cnf
ls: 无法访问/etc/my.cnf: 没有那个文件或目录
[root@db02 ~]# ls -l /etc/my.cnf.bak
-rw-r--r--. 1 root root 534 2月 27 23:41 /etc/my.cnf.bak
1.3分别再db01和db02中创建相关目录初始化mysql实例：
[root@db01 ~]# mkdir -p /data/33{07..10}/data
[root@db01 ~]# mysqld --initialize-insecure --user=mysql --datadir=/data/3307/data --basedir=/application/mysql [root@db01 ~]# mysqld --initialize-insecure --user=mysql --datadir=/data/3308/data --basedir=/application/mysql [root@db01 ~]# mysqld --initialize-insecure --user=mysql --datadir=/data/3309/data --basedir=/application/mysql [root@db01 ~]# mysqld --initialize-insecure --user=mysql --datadir=/data/3310/data --basedir=/application/mysql
1.4分别在db01和db02准备配置文件：
cat >/data/3307/my.cnf<<EOF [mysqld] basedir=/application/mysql datadir=/data/3307/data socket=/data/3307/mysql.sock port=3307 log_error=/data/3307/mysql.log log_bin=/data/3307/mysql-bin binlog_format=row skip-name-resolve server_id=7 gtid-mode=on enforce-gtid-consistency=true log-slave-updates=1 EOF cat >/data/3308/my.cnf<<EOF [mysqld] basedir=/application/mysql datadir=/data/3308/data port=3308 socket=/data/3308/mysql.sock log_error=/data/3308/mysql.log log_bin=/data/3308/mysql-bin binlog_format=row skip-name-resolve server_id=8 gtid-mode=on enforce-gtid-consistency=true log-slave-updates=1 EOF cat >/data/3309/my.cnf<<EOF [mysqld] basedir=/application/mysql datadir=/data/3309/data socket=/data/3309/mysql.sock port=3309 log_error=/data/3309/mysql.log log_bin=/data/3309/mysql-bin binlog_format=row skip-name-resolve server_id=9 gtid-mode=on enforce-gtid-consistency=true log-slave-updates=1 EOF cat >/data/3310/my.cnf<<EOF [mysqld] basedir=/application/mysql datadir=/data/3310/data socket=/data/3310/mysql.sock port=3310 log_error=/data/3310/mysql.log log_bin=/data/3310/mysql-bin binlog_format=row skip-name-resolve server_id=10 gtid-mode=on enforce-gtid-consistency=true log-slave-updates=1 EOF
cat >/data/3307/my.cnf<<EOF [mysqld] basedir=/application/mysql datadir=/data/3307/data socket=/data/3307/mysql.sock port=3307 log_error=/data/3307/mysql.log log_bin=/data/3307/mysql-bin binlog_format=row skip-name-resolve server_id=17 gtid-mode=on enforce-gtid-consistency=true log-slave-updates=1 EOF cat >/data/3308/my.cnf<<EOF [mysqld] basedir=/application/mysql datadir=/data/3308/data port=3308 socket=/data/3308/mysql.sock log_error=/data/3308/mysql.log log_bin=/data/3308/mysql-bin binlog_format=row skip-name-resolve server_id=18 gtid-mode=on enforce-gtid-consistency=true log-slave-updates=1 EOF cat >/data/3309/my.cnf<<EOF [mysqld] basedir=/application/mysql datadir=/data/3309/data socket=/data/3309/mysql.sock port=3309 log_error=/data/3309/mysql.log log_bin=/data/3309/mysql-bin binlog_format=row skip-name-resolve server_id=19 gtid-mode=on enforce-gtid-consistency=true log-slave-updates=1 EOF cat >/data/3310/my.cnf<<EOF [mysqld] basedir=/application/mysql datadir=/data/3310/data socket=/data/3310/mysql.sock port=3310 log_error=/data/3310/mysql.log log_bin=/data/3310/mysql-bin binlog_format=row skip-name-resolve server_id=20 gtid-mode=on enforce-gtid-consistency=true log-slave-updates=1 EOF
1.5分别在db01和db02准备启动脚本（脚本一样）：
cat > /etc/systemd/system/mysqld3307.service <<EOF
[Unit]
Description=Mysql Server
Documentation=man:mysqld(8)
Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html
After=network.target
After=syslog.target
[Install]
WantedBy=multi-user.target
[Service]
User=mysql
Group=mysql
ExecStart=/application/mysql/bin/mysqld --defaults-file=/data/3307/my.cnf
LimitNOFILE = 5000
EOF
cat > /etc/systemd/system/mysqld3308.service <<EOF
[Unit]
Description=Mysql Server
Documentation=man:mysqld(8)
Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html
After=network.target
After=syslog.target
[Install]
WantedBy=multi-user.target
[Service]
User=mysql
Group=mysql
ExecStart=/application/mysql/bin/mysqld --defaults-file=/data/3308/my.cnf
LimitNOFILE = 5000
EOF cat > /etc/systemd/system/mysqld3309.service <<EOF
[Unit]
Description=Mysql Server
Documentation=man:mysqld(8)
Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html
After=network.target
After=syslog.target
[Install]
WantedBy=multi-user.target
[Service]
User=mysql
Group=mysql
ExecStart=/application/mysql/bin/mysqld --defaults-file=/data/3309/my.cnf
LimitNOFILE = 5000
EOF cat > /etc/systemd/system/mysqld3310.service <<EOF
[Unit]
Description=Mysql Server
Documentation=man:mysqld(8)
Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html
After=network.target
After=syslog.target
[Install]
WantedBy=multi-user.target
[Service]
User=mysql
Group=mysql
ExecStart=/application/mysql/bin/mysqld --defaults-file=/data/3310/my.cnf
LimitNOFILE = 5000
EOF
1.6分别给db01和db02的mysql用户和用户组赋予权限并启动多实例：
[root@db01 system]# chown -R mysql.mysql /data/* [root@db01 system]# systemctl start mysqld3307.service Warning: mysqld3307.service changed on disk. Run 'systemctl daemon-reload' to reload units. [root@db01 system]# systemctl daemon-reload [root@db01 system]# systemctl start mysqld3307.service [root@db01 system]# systemctl start mysqld3308.service [root@db01 system]# systemctl start mysqld3309.service
[root@db01 system]# systemctl start mysqld3310.service
[root@db01 system]# netstat -lnp|grep 330
1.7分别验证db01和db02的登录：
[root@db01 system]# mysql -S /data/3307/mysql.sock -e "show variables like 'server_id'" +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 7 | +---------------+-------+ [root@db01 system]# mysql -S /data/3308/mysql.sock -e "show variables like 'server_id'" +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 8 | +---------------+-------+ [root@db01 system]# mysql -S /data/3309/mysql.sock -e "show variables like 'server_id'" +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 9 | +---------------+-------+ [root@db01 system]# mysql -S /data/3310/mysql.sock -e "show variables like 'server_id'" +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 10 | +---------------+-------+ [root@db01 system]#
标签：--,data,Mycat,实例,mysql,my,db01,root,分布式 来源： https://www.cnblogs.com/tyjs09/p/14523825.html