【MYSQL】一台centos6.5主机建两个mysql实例实现主从复制环境

【mysql5.5】安装略！<源码包编译安装>

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# mysqladmin -ppassword  ping  

mysqld is alive

# /etc/init.d/mysqld status

MySQL running (21075)[  OK  ]

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mysql服务器正确运行中

# mysqld_multi --example

# This is an example of a my.cnf file for mysqld_multi.
# Usually this file is located in home dir ~/.my.cnf or /etc/my.cnf
#
# SOME IMPORTANT NOTES FOLLOW:
#
# 1.COMMON USER
#
# Make sure that the MySQL user, who is stopping the mysqld services, has
# the same password to all MySQL servers being accessed by mysqld_multi.
# This user needs to have the 'Shutdown_priv' -privilege, but for security
# reasons should have no other privileges. It is advised that you create a
# common 'multi_admin' user for all MySQL servers being controlled by
# mysqld_multi. Here is an example how to do it:
#
# GRANT SHUTDOWN ON *.* TO multi_admin@localhost IDENTIFIED BY 'password'
#
# You will need to apply the above to all MySQL servers that are being
# controlled by mysqld_multi. 'multi_admin' will shutdown the servers
# using 'mysqladmin' -binary, when 'mysqld_multi stop' is being called.
#
# 2.PID-FILE
#
# If you are using mysqld_safe to start mysqld, make sure that every
# MySQL server has a separate pid-file. In order to use mysqld_safe
# via mysqld_multi, you need to use two options:
#
# mysqld=/path/to/mysqld_safe
# ledir=/path/to/mysqld-binary/
#
# ledir (library executable directory), is an option that only mysqld_safe
# accepts, so you will get an error if you try to pass it to mysqld directly.
# For this reason you might want to use the above options within [mysqld#]
# group directly.
#
# 3.DATA DIRECTORY
#
# It is NOT advised to run many MySQL servers within the same data directory.
# You can do so, but please make sure to understand and deal with the
# underlying caveats. In short they are:
# - Speed penalty
# - Risk of table/data corruption
# - Data synchronising problems between the running servers
# - Heavily media (disk) bound
# - Relies on the system (external) file locking
# - Is not applicable with all table types. (Such as InnoDB)
# Trying so will end up with undesirable results.
#
# 4.TCP/IP Port
#
# Every server requires one and it must be unique.
#
# 5.[mysqld#] Groups
#
# In the example below the first and the fifth mysqld group was
# intentionally left out. You may have 'gaps' in the config file. This
# gives you more flexibility.
#
# 6.MySQL Server User
#
# You can pass the
c406
user=... option inside [mysqld#] groups. This
# can be very handy in some cases, but then you need to run mysqld_multi
# as UNIX root.
#
# 7.A Start-up Manage Script for mysqld_multi
#
# In the recent MySQL distributions you can find a file called
# mysqld_multi.server.sh. It is a wrapper for mysqld_multi. This can
# be used to start and stop multiple servers during boot and shutdown.
#
# You can place the file in /etc/init.d/mysqld_multi.server.sh and
# make the needed symbolic links to it from various run levels
# (as per Linux/Unix standard). You may even replace the
# /etc/init.d/mysql.server script with it.
#
# Before using, you must create a my.cnf file either in /usr/local/mysql/my.cnf
# or /root/.my.cnf and add the [mysqld_multi] and [mysqld#] groups.
#
# The script can be found from support-files/mysqld_multi.server.sh
# in MySQL distribution. (Verify the script before using)
#

[mysqld_multi]
mysqld = /usr/local/mysql/bin/mysqld_safe
mysqladmin = /usr/local/mysql/bin/mysqladmin
user = multi_admin
password = my_password

[mysqld2]
socket = /tmp/mysql.sock2
port = 3307
pid-file = /mnt/myweb/mysql2/hostname.pid2
datadir = /mnt/myweb/mysql2
language = /usr/local/mysql/share/mysql/english
user = unix_user1

[mysqld3]
mysqld = /path/to/mysqld_safe
ledir = /path/to/mysqld-binary/
mysqladmin = /path/to/mysqladmin
socket = /tmp/mysql.sock3
port = 3308
pid-file = /mnt/myweb/mysql3/hostname.pid3
datadir = /mnt/myweb/mysql3
language = /usr/local/mysql/share/mysql/swedish
user = unix_user2

[mysqld4]
socket = /tmp/mysql.sock4
port = 3309
pid-file = /mnt/myweb/mysql4/hostname.pid4
datadir = /mnt/myweb/mysql4
language = /usr/local/mysql/share/mysql/estonia
user = unix_user3

[mysqld6]
socket = /tmp/mysql.sock6
port = 3311
pid-file = /mnt/myweb/mysql6/hostname.pid6
datadir = /mnt/myweb/mysql6
language = /usr/local/mysql/share/mysql/japanese
user = unix_user4

# vi /etc/my.cnf
粘贴到配置文件尾部

# 多实例配置
#
[mysqld_multi]
mysqld = /usr/local/mysql/bin/mysqld_safe
mysqladmin = /usr/local/mysql/bin/mysqladmin
user = root
password = 123456

[mysqld2]
socket = /tmp/mysql.sock2
port = 3307
pid-file = /mnt/myweb/data2/hostname.pid2
datadir = /mnt/myweb/data2
#language = /usr/local/mysql/share/mysql/english
log-slow-queries = /var/log/mysql2/slow-query-log
user = mysql
log-bin = mysql-bin
server-id = 2

新建对应的日志目录 和 数据库目录   并授权

利利用 mysql_install_db 安装初始化库  

# /usr/local/mysql/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql --datadir=/mnt/myweb/data2 &

启动实例2

# mysqld_multi start 2

连接msyql 实例2 空密码  可以连接后 修改root密码  --- 授权

# mysql -S /tmp/mysql.sock2 -uroot -p

配置主从

实现简单主从  ： 点击打开链接

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