centos6安裝多實例mysql

centos 6.5，使用二進制安裝多實例mysql 5.5.60

所需安裝包mysql-5.5.60-linux-glibc2.12-x86_64.tar.gz、ncurses-devel-5.7-4.20090207.el6.x86_64.rpm、libaio-devel-0.3.107-10.el6.x86_64.rpm

在一臺機器上開啓多個不一樣的服務端口，運行多個mysql服務進程，這些mysql多實例共用一套mysql安裝程序，使用不一樣（也能夠相同）的my.cnf配置文件、啓動程序、數據文件，多個實例根據配置文件對應的設定值來取得對應數量的服務器相關硬件資源。多實例相似合租的各個房間，硬件資源至關於公用的廚房、衛生間和客廳

 

建立更新包目錄，並將三個安裝包上傳至該目錄下，賦予執行權限

[root@oldboy ~]# mkdir -p /home/oldboy/tools
[root@oldboy ~]# cd /home/oldboy/tools
[root@oldboy tools]# chmod +x *
[root@oldboy tools]# rpm -ivh --nodeps ncurses-devel-5.7-4.20090207.el6.x86_64.rpm
[root@oldboy tools]# rpm -ivh libaio-devel-0.3.107-10.el6.x86_64.rpm

 

建立用戶和組、解壓二進制mysql安裝包、並建立軟鏈接

[root@oldboy tools]# groupadd mysql
[root@oldboy tools]# useradd -M mysql -g mysql -s /sbin/nologin
[root@oldboy tools]# tar zxf mysql-5.5.60-linux-glibc2.12-x86_64.tar.gz 
[root@oldboy tools]# mkdir -p /application/
[root@oldboy tools]# mv mysql-5.5.60-linux-glibc2.12-x86_64 /application/mysql-5.5.60
[root@oldboy tools]# ln -s /application/mysql-5.5.60/ /application/mysql

 

以/data目錄做爲mysql多實例的總根目錄，在/data下建立mysql實例端口號330六、3307的二級目錄，不一樣的端口號表明不一樣的實例，各個實例目錄下又包含各自的數據文件、配置文件及啓動文件。

[root@oldboy tools]# mount /dev/cdrom /mnt
mount: block device /dev/sr0 is write-protected, mounting read-only
[root@oldboy tools]# cd /mnt/Packages/
[root@oldboy Packages]# rpm -ivh tree-1.5.3-2.el6.x86_64
[root@oldboy Packages]# mkdir -p /data/{3306,3307}/data
[root@oldboy Packages]# tree /data
/data
├── 3306
│   └── data
└── 3307
    └── data

4 directories, 0 files

 

配置mysql配置文件

[root@oldboy Packages]# mv /etc/my.cnf  /etc/my.cnf.bak
[root@oldboy Packages]# cd /application/mysql/support-files/
[root@oldboy support-files]# cp my-small.cnf /etc/my.cnf

再將事先編輯好的兩個my.cnf配置文件分別放置到/data/3306/和/data/3307/下，兩個 mysql配置文件分別放置到/data/3306/和/data/3307/下（3306和3307的兩對配置文件除了端口3306和3307不一樣，其餘徹底相同），修改所屬組和權限

[root@oldboy ~]# chown -R mysql.mysql /data
[root@oldboy ~]# chmod +x /data/{3306,3307}/mysql

3306的my.cnf內容以下

[client]
port=3306
socket= /data/3306/mysql.sock
[mysql]
no-auto-rehash
[mysqld]
user    = mysql
port    = 3306
socket  = /data/3306/mysql.sock
basedir = /application/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
#default_table_type = InnoDB
thread_stack = 192K
#transaction_isolation = READ-COMMITTED
tmp_table_size = 2M
max_heap_table_size = 2M
long_query_time = 1
#log_long_format
#log-error = /data/3306/error.log
#log-slow-queries =/data/3306/slow.log
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
#myisam_sort_buffer_size = 1M
#myisam_max_sort_file_size = 10G
#myisam_max_extra_sort_file_size = 10G
#myisam_repair_threads = 1
#myisam_recover
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/mysql3306.err
pid-file=/data/3306/mysqld.pid

3306的mysql文件內容以下

#!/bin/sh
######################################
######################################
#init
port=3306
mysql_user="root"
mysql_pwd="oldboy"
CmdPath="/application/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

 

 設置PATH環境變量

[root@oldboy ~]# echo 'export PATH=/application/mysql/bin:$PATH'>>/etc/profile
[root@oldboy ~]# source /etc/profile
[root@oldboy ~]# echo $PATH
/application/mysql/bin:/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

 

安裝兩個mysql實例，出現兩個ok表示此步驟沒有問題

[root@oldboy ~]# cd /application/mysql/scripts/
[root@oldboy scripts]# ./mysql_install_db --basedir=/application/mysql --datadir=/data/3306/data --user=mysql
…………………
Installing MySQL system tables...
180727 2:45:31 [Note] Ignoring --secure-file-priv value as server is running with --bootstrap.
180727 2:45:31 [Note] /application/mysql/bin/mysqld (mysqld 5.5.60) starting as process 60182 ...
OK
Filling help tables...
180727 2:45:31 [Note] Ignoring --secure-file-priv value as server is running with --bootstrap.
180727 2:45:31 [Note] /application/mysql/bin/mysqld (mysqld 5.5.60) starting as process 60189 ...
OK
…………………
[root@oldboy scripts]# ./mysql_install_db --basedir=/application/mysql --datadir=/data/3307/data --user=mysql
…………………
Installing MySQL system tables...
180727  2:47:01 [Note] Ignoring --secure-file-priv value as server is running with --bootstrap.
180727  2:47:01 [Note] /application/mysql/bin/mysqld (mysqld 5.5.60) starting as process 60234 ...
OK
Filling help tables...
180727  2:47:01 [Note] Ignoring --secure-file-priv value as server is running with --bootstrap.
180727  2:47:01 [Note] /application/mysql/bin/mysqld (mysqld 5.5.60) starting as process 60241 ...
OK
…………………

 

 

啓動mysql實例，先啓動3306實例

[root@oldboy scripts]# /data/3306/mysql start
Starting MySQL...
[root@oldboy scripts]# 180727 02:49:17 mysqld_safe error: log-error set to '/data/3306/mysql3306.err', however file don't exists. Create writable for user 'mysql'.

上面報log-error '/data/3306/mysql3306.err'不能存在，那麼建立

[root@oldboy scripts]#  cd /data
[root@oldboy data]# touch 3306/mysql3306.err
[root@oldboy data]# touch 3307/mysql3307.err
[root@oldboy data]# chown mysql.mysql 3306/mysql3306.err
[root@oldboy data]# chown mysql.mysql 3307/mysql3307.err

再分別啓動和登陸登陸兩個實例，啓動後經過netstat -lntup查看啓動狀況，多實例登陸時須要經過-S指定sock文件，且初次登陸沒有密碼

[root@oldboy data]# /data/3306/mysql start
Starting MySQL...
[root@oldboy data]# /data/3307/mysql start
Starting MySQL...
[root@oldboy 3306]# netstat -lntup|grep 33
tcp        0      0 0.0.0.0:3307                0.0.0.0:*                   LISTEN      771/mysqld          
tcp        0      0 0.0.0.0:3306                0.0.0.0:*                   LISTEN      803/mysqld  
[root@oldboy data]# mysql -S /data/3306/mysql.sock  （無密碼登陸）
[root@oldboy data]# mysql -S /data/3307/mysql.sock  （無密碼登陸）

 

經過/application/mysql/bin下的mysqladmin命令給兩個實例設置root密碼，再經過密碼登陸mysql

[root@oldboy data]# mysqladmin -u root -S /data/3306/mysql.sock password "oldboy"
[root@oldboy data]# mysqladmin -u root -S /data/3307/mysql.sock password "oldboy"
[root@oldboy data]# mysql -uroot -poldboy -S /data/3306/mysql.sock（有密碼登陸）
mysql> system mysql -uroot -poldboy -S /data/3307/mysql.sock（在3306實例中經過system系統命令切換到3307實例）

 

設置多實例開機自啓動

[root@oldboy data]# echo "#mysql multi instance start when system starting" >>/etc/rc.local
[root@oldboy data]# echo "/data/3306/mysql start" >>/etc/rc.local
[root@oldboy data]# echo "/data/3307/mysql start" >>/etc/rc.local
[root@oldboy data]# tail -3 /etc/rc.local
tail: inotify cannot be used, reverting to polling
#mysql multi instance start when system starting
/data/3306/mysql start
/data/3307/mysql start