MySQL不同版本多实例

软连接，修改环境变量

二进制数据库链接：https://pan.baidu.com/s/18tpGgl1GWqtV2sWOAC38lA 提取码：x1vl

创建用户

useradd  -s /sbin/nologin mysql

创建软连接

[root@db02 ~]#  mkdir /app/database -p 
[root@db01 database]# ln -s mysql-5.6.46-linux-glibc2.12-x86_64 mysql56
[root@db01 database]# ln -s mysql-8.0.18-linux-glibc2.12-x86_64 mysql80
[root@db01 database]# mv /etc/my.cnf /etc/my.cnf.bak
[root@db01 database]# vim /etc/profile
#注释以下信息
#export PATH=/app/database/mysql/bin:$PATH
​
#复制一个新窗口
[root@db01 ~]# mysql -V
-bash: mysql: command not found

准备目录

rm -rf /data/331{7..9}/*
rm -rf  /binlog/331{7..9}
mkdir -p /data/331{7..9}/data
mkdir -p /binlog/331{7..9}
chown -R mysql.mysql /data/*   /binlog/*

准备配置文件

cat > /data/3317/my.cnf <<EOF
[mysqld]
basedir=/app/database/mysql56
datadir=/data/3317/data
socket=/tmp/mysql3317.sock
log_error=/data/3317/mysql.log
port=3317
server_id=17
log_bin=/binlog/3317/mysql-bin
EOF
​
cat > /data/3318/my.cnf <<EOF
[mysqld]
basedir=/app/database/mysql80
datadir=/data/3318/data
socket=/tmp/mysql3318.sock
log_error=/data/3318/mysql.log
port=3318
server_id=18
log_bin=/binlog/3318/mysql-bin
EOF

初始化数据

yum install libaio -y 
#5.6
/app/database/mysql56/scripts/mysql_install_db  --user=mysql --datadir=/data/3317/data  --basedir=/app/database/mysql56
​
#8.0 
/app/database/mysql80/bin/mysqld --initialize-insecure  --user=mysql --datadir=/data/3318/data  --basedir=/app/database/mysql80

准备启动脚本

#5.6 
cat >/etc/systemd/system/mysqld3317.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=/app/database/mysql56/bin/mysqld --defaults-file=/data/3317/my.cnf
LimitNOFILE = 5000
EOF
​
#8.0
cat >/etc/systemd/system/mysqld3318.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=/app/database/mysql80/bin/mysqld --defaults-file=/data/3318/my.cnf
LimitNOFILE = 5000
EOF

启动数据库

systemctl start  mysqld3317.service
systemctl enable  mysqld3317.service
systemctl start  mysqld3318.service
systemctl enable  mysqld3318.service