CentOS7.2安装mysql-5.7.19多实例

安装多实例之前首先需要先安装mysql，这里就不介绍如何安装mysql了，参考前面的博客：https://www.cnblogs.com/hei-ma/p/9505509.html

安装多实例之前需要将之前安装好的mysql停掉。

# /etc/init.d/mysqld stop

开始正式安装mysql-5.7.19多实例

1、创建多实例目录

# mkdir -p /data/mysql{,}/data

2、编辑多实例配置文件

3308端口的需要将3307修改为3308，server-id也需要改

# cat /data/mysql3307/my.cnf
[client]
port            =
socket          = /data/mysql3307/mysql.sock

[mysql]
no-auto-rehash

[mysqld]
secure_file_priv =
user    = mysql
port    =
socket  = /data/mysql3307/mysql.sock
basedir = /usr/local/mysql
datadir = /data/mysql3307/data
open_files_limit    =
back_log =
max_connections =
max_connect_errors =
table_open_cache =
external-locking = FALSE
max_allowed_packet =8M
sort_buffer_size = 1M
join_buffer_size = 1M
thread_cache_size =
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
pid-file = /data/mysql3307/mysql.pid
log-bin = /data/mysql/mysql-bin
relay-log = /data/mysql3307/relay-bin
relay-log-info-file = /data/mysql3307/relay-log.info
binlog_cache_size = 1M
max_binlog_cache_size = 1M
max_binlog_size = 2M
expire_logs_days =
key_buffer_size = 16M
read_buffer_size = 1M
read_rnd_buffer_size = 1M
bulk_insert_buffer_size = 1M
lower_case_table_names =
skip-name-resolve
slave-skip-errors = ,
replicate-ignore-db=mysql
server-id =
innodb_buffer_pool_size = 32M
innodb_data_file_path = ibdata1:128M:autoextend
innodb_thread_concurrency =
innodb_flush_log_at_trx_commit =
innodb_log_buffer_size = 2M
innodb_log_file_size = 4M
innodb_log_files_in_group =
innodb_max_dirty_pages_pct =
innodb_lock_wait_timeout =
innodb_file_per_table =
[mysqldump]
quick
max_allowed_packet = 2M

[mysqld_safe]
log-error=/data/mysql3307/mysql_3307.err
pid-file=/data/mysql3307/mysqld.pid

3、创建用户并授权

# useradd -s /sbin/nologin -M mysql
# chown -R mysql.mysql /data/mysql330*

4、初始化

# cd /mysql-path/bin      #进入到你的mysql安装路径
# ./mysqld --defaults-file=/data/mysql3307/my.cnf --basedir=/usr/local/mysql --user=mysql --initialize-insecure --explicit_defaults_for_timestamp
# echo $?             #确认初始化是否成功，返回0则成功

5、启动多实例

# cd /mysql-path/bin           #mysql的安装路径
# ./mysqld_safe --defaults-file=/data/mysql3307/my.cnf &          #启动mysql

6、确认进程

# ps -ef|grep /data/mysql3307         #查看进程
root          : pts/    :: /bin/sh ./mysqld_safe --defaults-file=/data/mysql3307/my.cnf
mysql        : pts/    :: /usr/local/mysql/bin/mysqld --defaults-file=/data/mysql3307/my.cnf --basedir=/usr/local/mysql --datadir=/data/mysql3307/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/data/mysql3307/mysql_3307.err --open-files-limit= --pid-file=/data/mysql3307/mysqld.pid --socket=/data/mysql3307/mysql.sock --port=
root          : pts/    :: grep --color=auto /data/mysql3307
# netstat -lnutp|grep             #查看端口
tcp6              :::                 :::*                    LISTEN      /mysqld

至此3307的多实例就配置完成了！！

3308的配置和3307一样，但是需要修改配置文件