mysql-多实例

Posted 赵SIR

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一、mysql 多实例

1、简介

什么使多实例呢?

多实例就是在一台机器上开启多个不同的服务端口(如:3306,3307);

运行多个MySQL服务进程,这些进程通过不同的socket监听不同的服务端口来提供各自的服务。

MySQL多实例共用一个 MySQL 的安装程序,使用不同(也可相同)的 my.cnf 配置文件,启动程序和数据文件。

在提供服务时,多实例 MySQL 在逻辑上是各自独立的,多个实例的本身是根据配置文件对应的设定值,来获得服务器的相关硬件资源多少。

2、安装配置前操作

安装配置前的一些配置少不了

文件的目录最好也规矩,这样才专业

/data/ops/app/mysql-5.6.23/     ###mysql的安装路径
mkdir /data/ops/app/mysql-5.6.23/{3306,3307}
vim /data/ops/app/mysql-5.6.23/etc/3306.cnf

[client]
character-set-server = utf8

[mysql]
character-set-server = utf8

[mysqld]
#bind-address=127.0.0.1
character-set-server = utf8
datadir=/data/ops/app/mysql-5.6.23/3306
socket=/data/ops/app/mysql-5.6.23/3306/3306.sock
user=mysql
skip-grant-tables

symbolic-links=0
skip-name-resolve

#init-connect=‘insert into accesslog.accesslog(id, time, localname, matchname) values(connection_id(), now(), user(),current_user());‘

slow_query_log = 1
long_query_time = 4
#slow-query-log-file = /data/ops/app/mysql-5.6.23/logs/3306/3306_slow.log
log-queries-not-using-indexes = false
lower-case-table-names = 1

server-id = 1
max_connections =5000
max_allowed_packet = 16M
connect_timeout = 60
log-slave-updates
log-bin = 3306-bin
expire_logs_days = 7
slave-skip-errors = 1062
#binlog_do_db =
back_log = 200
max_connect_errors = 10
table_open_cache = 10240

binlog_cache_size = 1M
max_heap_table_size = 64M
sort_buffer_size = 4M
join_buffer_size = 4M
thread_cache_size = 8
thread_concurrency = 8
query_cache_size = 512M
query_cache_limit = 2M
ft_min_word_len = 4
thread_stack = 192K
transaction_isolation = REPEATABLE-READ
tmp_table_size = 64M
binlog_format = mixed
log-short-format
key_buffer_size = 512M
read_buffer_size = 16M
read_rnd_buffer_size = 16M
bulk_insert_buffer_size = 64M
innodb_file_per_table
innodb_additional_mem_pool_size = 100M
innodb_buffer_pool_size = 1G
innodb_data_file_path = ibdata1:12M;ibdata2:12M:autoextend
innodb_file_io_threads = 4
innodb_thread_concurrency = 8
innodb_flush_log_at_trx_commit = 2
innodb_log_buffer_size = 8M
innodb_log_file_size = 256M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 90
innodb_lock_wait_timeout = 120
slave-skip-errors = 1062

[mysqld_safe]
log-error=/data/ops/app/mysql-5.6.23/logs/3306/3306.log
pid-file=/data/ops/app/mysql-5.6.23/3306/3306.pid
vim /data/ops/app/mysql-5.6.23/etc/3307.cnf  ### 配置文件

[client]
character-set-server = utf8

[mysql]
character-set-server = utf8

[mysqld]
#bind-address=127.0.0.1 
character-set-server = utf8
datadir=/data/ops/app/mysql-5.6.23/3307
socket=/data/ops/app/mysql-5.6.23/3307/3307.sock
user=mysql
skip-grant-tables

symbolic-links=0
skip-name-resolve

#init-connect=‘insert into accesslog.accesslog(id, time, localname, matchname) values(connection_id(), now(), user(),current_user());‘

slow_query_log = 1
long_query_time = 4
slow-query-log-file = /data/ops/app/mysql-5.6.23/logs/3307/3307_slow.log
log-queries-not-using-indexes = false
lower-case-table-names = 1

server-id = 1
max_connections =5000
max_allowed_packet = 16M
connect_timeout = 60
log-slave-updates
log-bin = 3307-bin
expire_logs_days = 7
slave-skip-errors = 1062
#binlog_do_db =
back_log = 200
max_connect_errors = 10
table_open_cache = 10240

binlog_cache_size = 1M
max_heap_table_size = 64M
sort_buffer_size = 4M
join_buffer_size = 4M
thread_cache_size = 8
thread_concurrency = 8
query_cache_size = 512M
query_cache_limit = 2M
ft_min_word_len = 4
thread_stack = 192K
transaction_isolation = REPEATABLE-READ
tmp_table_size = 64M
binlog_format = mixed
log-short-format
key_buffer_size = 512M
read_buffer_size = 16M
read_rnd_buffer_size = 16M
bulk_insert_buffer_size = 64M
innodb_file_per_table
innodb_additional_mem_pool_size = 100M
innodb_buffer_pool_size = 1G
innodb_data_file_path = ibdata1:12M;ibdata2:12M:autoextend
innodb_file_io_threads = 4
innodb_thread_concurrency = 8
innodb_flush_log_at_trx_commit = 2
innodb_log_buffer_size = 8M
innodb_log_file_size = 256M
innodb_log_files_in_group = 3
innodb_max_dirty_pages_pct = 90
innodb_lock_wait_timeout = 120
slave-skip-errors = 1062

[mysqld_safe]
log-error=/data/ops/app/mysql-5.6.23/logs/3307/3307.log
pid-file=/data/ops/app/mysql-5.6.23/3307/3307.pid

###创建初始化脚本以及启动文件

vim /data/ops/app/mysql-5.6.23/scripts/init/3306.sh

#/bin/bash
# 3306.sh can create a 3306 instance
# create directories
if [ ! -d ‘/data/ops/app/mysql-5.6.23/3306‘ ];then
  mkdir -p ‘/data/ops/app/mysql-5.6.23/3306‘;
fi
if [ ! -d ‘/data/ops/app/mysql-5.6.23/logs/3306‘ ];then
  mkdir -p ‘/data/ops/app/mysql-5.6.23/logs/3306‘;
fi

# set env
conf="/data/ops/app/mysql-5.6.23/etc/3306.cnf"
basedir="/data/ops/app/mysql-5.6.23"
datadir="/data/ops/app/mysql-5.6.23/3306"
pid="/data/ops/app/mysql-5.6.23/3306/3306.pid"
sock="/data/ops/app/mysql-5.6.23/3306/3306.sock"
port=‘3000‘
user=‘mysql‘

# create instance
#/data/ops/app/mysql-5.6.23/scripts/mysql_install_db --user=$user --basedir=$basedir --datadir=$datadir

# boot instance
/data/ops/app/mysql-5.6.23/bin/mysqld_safe --defaults-file=$conf --user=$user --basedir=$basedir --datadir=$datadir --port=$port --pid-file=$pid --socket=$sock &
vim /data/ops/app/mysql-5.6.23/scripts/init/3307.sh

#/bin/bash
# 3307.sh can create a 3307 instance
# create directories
if [ ! -d ‘/data/ops/app/mysql-5.6.23/3307‘ ];then
  mkdir -p ‘/data/ops/app/mysql-5.6.23/3307‘;
fi
if [ ! -d ‘/data/ops/app/mysql-5.6.23/logs/3307‘ ];then
  mkdir -p ‘/data/ops/app/mysql-5.6.23/logs/3307‘;
fi

# set env
conf="/data/ops/app/mysql-5.6.23/etc/3307.cnf"
basedir="/data/ops/app/mysql-5.6.23"
datadir="/data/ops/app/mysql-5.6.23/3307"
pid="/data/ops/app/mysql-5.6.23/3307/3307.pid"
sock="/data/ops/app/mysql-5.6.23/3307/3307.sock"
port=‘3002‘
user=‘mysql‘

# create instance
#/data/ops/app/mysql-5.6.23/scripts/mysql_install_db --user=$user --basedir=$basedir --datadir=$datadir

# boot instance
/data/ops/app/mysql-5.6.23/bin/mysqld_safe --defaults-file=$conf --user=$user --basedir=$basedir --datadir=$datadir --port=$port --pid-file=$pid --socket=$sock &

#####注意初始化脚本完毕以后mysql才能启动

su --shell=/bin/bash mysql -c "/data/ops/app/mysql-5.6.23/scripts/init/3306.sh"                               ###启动脚本 可以放在/etc/rc.local下 开机自启

su --shell=/bin/bash mysql -c "/data/ops/app/mysql-5.6.23/scripts/init/3307.sh"

####mysql关闭

killall mysqld  不建议这样操作

mysqladmin -u mysql -P 3002 -S /data/ops/app/mysql-5.6.23/3307/3307.sock shutdown            ###建议这样关闭数据库

 

增加一个mysql实例

问题又来了,要增加一个实例怎么弄呢?

其实不难,只需按上面步骤,创建目录,在修改相应配置文件,初始化就ok

 

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