mysql 5.6配置多实例

环境：centos 6.7 x86_64

mysql version:mysql-5.6.33-linux-glibc2.5-x86_64.tar.gz

    下载地址：https://dev.mysql.com/downloads/mysql/5.6.html#downloads

步骤：

1.解压包，创建mysql管理用户和数据目录

[root@db1 ~]#tar -xf mysql-5.6.33-linux-glibc2.5-x86_64.tar.gz 
#解压mysql压缩包
[root@db1 ~]#mv mysql-5.6.33-linux-glibc2.5-x86_64 /usr/local/mysql
#移动mysql目录到/usr/local/mysql
[root@db1 ~]#useradd -s /sbin/nologin -M mysql
#创建mysql用户用于管理mysql进程不创建家目录，不允许tty登录
[root@db1 ~]#mkdir /data/{3306,3307}/data -pv
#创建每个实例文件保存mysql数据的位置
[root@db1 ~]#chown -R mysql.mysql /data
#将文件夹权限赋予mysql用户，不然不能启动和写入数据

2.初始化3306、3307实例数据库

[root@db1 ~]# /usr/local/mysql/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql --datadir=/data/3306/data/
#初始化3306数据库
[root@db1 ~]# /usr/local/mysql/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql --datadir=/data/3307/data/
#初始化3307数据库

3.分别创建3306和3307的my.cnf配置文件

[root@db1 ~]# vim /data/3306/my.cnf 
[client]
port            = 3306
socket          = /data/3306/mysql.sock
[mysql]
no-auto-rehash
[mysqld]
user    = mysql
port    = 3306
socket  = /data/3306/mysql.sock
basedir = /usr/local/mysql
datadir = /data/3306/data
open_files_limit = 1024
back_log = 600
max_connections = 800
max_connect_errors = 3000
#table_cache = 614
external-locking = FALSE
max_allowed_packet =8M
sort_buffer_size = 1M
join_buffer_size = 1M
thread_cache_size = 100
thread_concurrency = 2
query_cache_size = 2M
query_cache_limit = 1M
query_cache_min_res_unit = 2k
thread_stack = 192K
tmp_table_size = 2M
max_heap_table_size = 2M
long_query_time = 1
pid-file = /data/3306/mysql.pid
log-bin = /data/3306/mysql-bin
relay-log = /data/3306/relay-bin
relay-log-info-file = /data/3306/relay-log.info
binlog_cache_size = 1M
max_binlog_cache_size = 1M
max_binlog_size = 2M
expire_logs_days = 7
key_buffer_size = 16M
read_buffer_size = 1M
read_rnd_buffer_size = 1M
bulk_insert_buffer_size = 1M
lower_case_table_names = 1
skip-name-resolve
slave-skip-errors = 1032,1062
replicate-ignore-db=mysql
server-id = 1
innodb_additional_mem_pool_size = 4M
innodb_buffer_pool_size = 32M
innodb_data_file_path = ibdata1:128M:autoextend
innodb_file_io_threads = 4
innodb_thread_concurrency = 8
innodb_flush_log_at_trx_commit = 2
innodb_log_buffer_size = 2M
innodb_log_file_size = 4M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 90
innodb_lock_wait_timeout = 120
innodb_file_per_table = 0
[mysqldump]
quick
max_allowed_packet = 2M
[mysqld_safe]
log-error=/data/3306/mysql_3306.err
pid-file=/data/3306/mysqld.pid
[root@db1 ~]#cp /data/3306/my.cnf /data/3307/my.cnf
[root@db1 ~]#sed -i 's#3306#3307#g' /data/3307/my.cnf

4.分别创建mysqld启动脚本

[root@db1 ~]# vim /data/3306/mysqld
#!/bin/bash
port=3306
mysql_user="root"
mysql_pwd="123456"
CmdPath="/usr/local/mysql/bin"
mysql_sock="/data/${port}/mysql.sock"
#startup function
function_start_mysql()
{
    if [ ! -e "$mysql_sock" ];then
      printf "Starting MySQL...\n"
      /bin/sh ${CmdPath}/mysqld_safe --defaults-file=/data/${port}/my.cnf 2>&1 > /dev/null &
    else
      printf "MySQL is running...\n"
      exit
    fi
}

#stop function
function_stop_mysql()
{
    if [ ! -e "$mysql_sock" ];then
       printf "MySQL is stopped...\n"
       exit
    else
       printf "Stoping MySQL...\n"
       ${CmdPath}/mysqladmin -u ${mysql_user} -p${mysql_pwd} -S /data/${port}/mysql.sock shutdown
   fi
}

#restart function
function_restart_mysql()
{
    printf "Restarting MySQL...\n"
    function_stop_mysql
    sleep 2
    function_start_mysql
}

case $1 in
start)
    function_start_mysql
;;
stop)
    function_stop_mysql
;;
restart)
    function_restart_mysql
;;
*)
    printf "Usage: /data/${port}/mysql {start|stop|restart}\n"
esac
#3307也copy一份并且修改端口路径
[root@db1 ~]#cp /data/3306/mysqld /data/3307/mysqld
[root@db1 ~]#sed -i 's#3306#3307#g' /data/3307/mysqld
#赋予执行权限
[root@db1 ~]#chmod +x /data/3306/mysqld
[root@db1 ~]#chmod +x /data/3307/mysqld

5.启动mysql

[root@db1 ~]# /data/3306/mysqld start
[root@db1 ~]# /data/3306/mysqld start
[root@db1 ~]# netstat -tlunp|grep mysql
tcp        0      0 :::3306                     :::*                        LISTEN      13995/mysqld        
tcp        0      0 :::3307                     :::*                        LISTEN      13263/mysqld  

6.更改密码

[root@db1 ~]# mysql -S /data/3306/mysql.sock
mysql> update mysql.user set password=password('123456') where user=root;
[root@db1 ~]# mysql -S /data/3307/mysql.sock
mysql> update mysql.user set password=password('123456') where user=root;

7.测试脚本启动和停止

[root@db1 ~]# /data/3307/mysqld stop