一台服务器上起2个mysql服务

一.添加组添，加用户到组，解压
groupadd mysql
useradd mysql -g mysql -M -s /sbin/nologin
tar -zxvf mysql-5.6.23-linux-glibc2.5-x86_64.tar.gz
tar -zxvf mysql-5.7.9-linux-glibc2.5-x86_64.tar.gz
mv mysql-5.6.23-linux-glibc2.5-x86_64 /mnt/sda4/mysql5.6.23
mv mysql-5.7.9-linux-glibc2.5-x86_64 /mnt/sda4/mysql65.7.9
mkdir -p /mnt/sda4/mysql5.6.23/data
mkdir -p /mnt/sda4/mysql5.7.9/data
二.默认的初始化路径
/usr/local/mysql/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data
安全启动
/usr/local/mysql/bin/mysqld_safe --defaults-file=/etc/my.cnf 这种方式启动后不能关闭，必须手动kill掉
使用启动脚本
cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld 就可以 service mysql stop|start|restart 了
三.mysql5.6.23版本
将文件 mysqld_safe,mysql.server,mysqld_multi.server,mysql-log-rotate 里面的/usr/local/mysql改为/mnt/sda4/mysql5.6.23 。5.7.9版本改为/mnt/sda4/mysql5.7.9
/mnt/sda4/mysql5.6.23/bin/mysqld_safe 将此文件里面的/tmp/mysql.sock---->/tmp/mysql5.6.23.sock 5.7.9版本改为/tmp/mysql5.7.9.sock
/mnt/sda4/mysql5.6.23/support-files/mysql.server
/mnt/sda4/mysql5.7.9/support-files/mysqld_multi.server
/mnt/sda4/mysql5.7.9/support-files/mysql-log-rotate
vim 里面既 %s/\/usr\/local\/mysql/\/mnt\/sda4\/mysql5.6.23/g
四.修改权限，配置文件
chown -R mysql:mysql /mnt/sda4/mysql5.6.23
[root@sam ~]# cat /etc/my5.6.23.cnf
[mysqld]
user=mysql
basedir = /mnt/sda4/mysql5.6.23
datadir = /mnt/sda4/mysql5.6.23/data
port=3306
socket=/tmp/mysql.sock
bind-address = 0.0.0.0
skip-external-locking
key_buffer_size = 16M
max_allowed_packet = 1M
table_open_cache = 64
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M
max_allowed_packet = 4M
max_connections=2000
innodb_buffer_pool_size = 3G
innodb_log_buffer_size = 256M
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
五.做对应的修改
/mnt/sda4/mysql5.6.23/scripts/mysql_install_db --user=mysql --basedir=/mnt/sda4/mysql5.6.23 --datadir=/mnt/sda4/mysql5.6.23/data
/mnt/sda4/mysql5.6.23/bin/mysqld_safe --defaults-file=/etc/my5.6.23.cnf 测试是否能够启动
cp /mnt/sda4/mysql5.6.23/support-files/mysql.server /etc/init.d/mysql5.6.23
这样就可以 service mysql stop|start|restart 了
六.mysql5.7.9版本初始化
这里要注意MySQL5.7.6以后屏蔽了mysql_install_db 只能选择mysql --initialize进行安装
5.7.9的配置配置文件
[root@sam ~]# cat /etc/my5.7.9.cnf
[mysqld]
user=mysql
basedir = /mnt/sda4/mysql5.7.9
datadir = /mnt/sda4/mysql5.7.9/data
port=3307 <---定义和5.6.23不同的端口号3307
socket=/tmp/mysql.sock
bind-address = 0.0.0.0
skip-external-locking
key_buffer_size = 16M
max_allowed_packet = 1M
table_open_cache = 64
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M
max_allowed_packet = 4M
max_connections=2000
innodb_buffer_pool_size = 3G
innodb_log_buffer_size = 256M
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
七.执行初始化和测试启动脚本
/mnt/sda4/mysql5.7.9/bin/mysqld --defaults-file=/etc/my5.7.9.cnf --initialize
/mnt/sda4/mysql5.7.9/bin/mysqld_safe --defaults-file=/etc/my5.7.9.cnf
[root@sam bin]# ./mysqld --defaults-file=/etc/my5.7.9.cnf --initialize
2015-11-19T14:40:52.540335Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2015-11-19T14:40:52.540810Z 0 [Warning] 'NO_ZERO_DATE', 'NO_ZERO_IN_DATE' and 'ERROR_FOR_DIVISION_BY_ZERO' sql modes should be used with strict mode. They will be merged with strict mode in a future release.
2015-11-19T14:40:52.540816Z 0 [Warning] 'NO_AUTO_CREATE_USER' sql mode was not set.
2015-11-19T14:40:55.180025Z 0 [Warning] InnoDB: New log files created, LSN=45790
2015-11-19T14:40:55.500690Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2015-11-19T14:40:55.601943Z 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: 8a648e5a-8ecb-11e5-911c-0050569c4b72.
2015-11-19T14:40:55.630337Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2015-11-19T14:40:55.631059Z 1 [Note] A temporary password is generated for root@localhost: ze:OCyh)U1&y <------随机密码
[root@sam bin]# ./mysqld_safe --defaults-file=/etc/my5.7.9.cnf
151119 22:42:26 mysqld_safe Logging to '/mnt/sda4/mysql5.7.9/data/sam.adsame.com.err'.
151119 22:42:26 mysqld_safe The file /usr/local/mysql/bin/mysqld
does not exist or is not executable. Please cd to the mysql installation
directory and restart this script from there as follows:
./bin/mysqld_safe&
See http://dev.mysql.com/doc/mysql/en/mysqld-safe.html for more information
八.查看启动的进程
[root@sam ~]# ps aux |grep mysql
root 30783 0.0 0.0 66064 1336 pts/4 S 23:02 0:00 /bin/sh /mnt/sda4/mysql5.7.9/bin/mysqld_safe --datadir=/mnt/sda4/mysql5.7.9/data --pid-file=/mnt/sda4/mysql5.7.9/data/sam.adsame.com.pid
mysql 31110 0.5 10.2 4504488 414676 pts/4 Sl 23:02 0:00 /mnt/sda4/mysql5.7.9/bin/mysqld --basedir=/mnt/sda4/mysql5.7.9 --datadir=/mnt/sda4/mysql5.7.9/data --plugin-dir=/mnt/sda4/mysql5.7.9/lib/plugin --user=mysql --log-error=/mnt/sda4/mysql5.7.9/data/sam.adsame.com.err --pid-file=/mnt/sda4/mysql5.7.9/data/sam.adsame.com.pid --socket=/tmp/mysql5.7.9.sock --port=3307
root 31169 0.0 0.0 65932 1336 pts/4 S 23:02 0:00 /bin/sh /mnt/sda4/mysql5.6.23/bin/mysqld_safe --datadir=/mnt/sda4/mysql5.6.23/data --pid-file=/mnt/sda4/mysql5.6.23/data/sam.adsame.com.pid
mysql 31732 1.0 30.1 4601900 1217628 pts/4 Sl 23:02 0:01 /mnt/sda4/mysql5.6.23/bin/mysqld --basedir=/mnt/sda4/mysql5.6.23 --datadir=/mnt/sda4/mysql5.6.23/data --plugin-dir=/mnt/sda4/mysql5.6.23/lib/plugin --user=mysql --log-error=/mnt/sda4/mysql5.6.23/data/sam.adsame.com.err --pid-file=/mnt/sda4/mysql5.6.23/data/sam.adsame.com.pid --socket=/tmp/mysql5.6.23.sock --port=3306
root 31770 0.0 0.0 61160 740 pts/1 S+ 23:04 0:00 grep mysql
九.客户端连接
/mnt/sda4/mysql5.6.23/bin/mysql -uroot -P3306 -h127.0.0.1
/mnt/sda4/mysql5.7.9/bin/mysql -uroot -P3307 -h127.0.0.1
mysql5.7.9修改密码
/mnt/sda4/mysql5.7.9/bin
[root@sam bin]# ./mysqladmin -uroot -P3307 -h127.0.0.1 -p password