标签：mysql
Mysql 高可用
架构（基于A/B复制）
Client 192.168.5.13/24
Mha_manager 192.168.5.15/24
Mysql_A1 192.168.5.17/24
Mysql_A2 192.168.5.18/24
Haproxy 192.168.5.16/24
Mysql_B1 192.168.5.19/24
Mysql_B2 192.168.5.20/24
Mysql_B3 192.168.5.21/24
其中mysql_A 只负责写入数据，VIP为192.168.5.200。
mysql_Ｂ 只负责读取数据，VIP为192.168.5.１00。
建立ssh互信认
ssh-keygen
for i in 15 16 17 18 19 20 21;do ssh-copy-id -i /root/.ssh/id_rsa.pub192.168.5.$i; done
统一时间
#!/bin/bash
for i in 15 16 17 18 19 20 21
do
ssh 192.168.5.$i date 081622552015
done
安装Perl工具（mha使用的是Perl语句）
#!/bin/bash
for i in 17 18 19 20 21
do
(
ssh192.168.5.$i "yum install perl-* -y" &>/tmp/perl_install
[$? -eq 0 ] && echo "192.168.5.$i perl_install ok" || echo"192.168.5.$i perl_install error"
)&
done
安装MySQL并进行相关设置
安装MySQL
#!/bin/bash
for i in 17 18 19 20 21
do
(
ssh192.168.5.$i "yum install mysql* -y" &>/tmp/mysql_install
[$? -eq 0 ] && echo "192.168.5.$i mysql_install ok" || echo"192.168.5.$i mysql_install error"
)&
done
2 分别修改mysql的binlog配置文件，开启A/B复制功能
vim /etc/my.cnf
server_id=1（2、3、4、5）
log_bin=binlog
log_bin_index=binlog.index
3 开启MySQL
#!/bin/bash
for i in 17 18 19 20 21
do
(
ssh192.168.5.$i /etc/init.d/mysqld start &>/tmp/mysql_install
[$? -eq 0 ] && echo "192.168.5.$i mysql_start ok" || echo"192.168.5.$i mysql_start error"
)&
done
4 分别添加MySQL A/B同步的管理账户
# mysql
mysql>grant replication slve on *.*to sko identified by ‘123‘;
mysql> flush privileges;
5 查看MySQL_A1的master信息（使用的binlog日志号）
mysql -e ‘show master status \G‘
6 修改其他MySQL的master.info 的内容，保证能正常同步数据
for i in 18 19 20 21; do ssh192.168.5.$i mysql -e "slave stop"; ssh 192.168.5.$i mysql -e"change master to master_host=‘192.168.5.17‘,master_user=‘sko‘,master_password=‘123‘,master_log_file=‘binlog.000003‘,master_log_pos=1420";ssh 192.168.5.$i mysql -e "slave start"; done
5.7 分别查看slave的状态
# mysql
mysql> show slave status \G;
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
5.8 分别给MySQL管理员root设置密码，清理不用的用户，并使root用户可以远程登录MySQL。
# mysql_secure_installation
# mysql -u root -p123
mysql>update mysql.user set host=‘%‘ where host=‘127.0.0.1‘;
mysql> flush privileges;
安装mha软件
分别在mha的服务端上安装node软件
cd mha_soft/
rpm -ivh mha4mysql-node-0.54-0.el6.noarch.rpm
2 在mha_manager上安装
安装依赖包
cd mha_soft/dependent/
yum localinstall./* -y
安装软件
rpm -ivhmha4mysql-manager-0.55-0.el6.noarch.rpm
rpm -ivhmha4mysql-node-0.54-0.el6.noarch.rpm
3 修改配置文件
vim /etc/mha/mha.cnf
[server default]
#mysql admin account and password
user=root
password=123
#mha workdir and working
manager_workdir=/etc/mha
manager_log=/etc/mha/manager_log
#mysql AB account and password
repl_user=sko
repl_password=123
#check_mha_mode time
ping_interval=1
#ssh account
ssh_user=root
[server1]
hostname=192.168.5.17
ssh_port=22
master_binlog_dir=/var/lib/mysql
candidate_master=1
[server2]
hostname=192.168.5.18
ssh_port=22
master_binlog_dir=/var/lib/mysql
candidate_master=1
[server3]
hostname=192.168.5.19
ssh_port=22
master_binlog_dir=/var/lib/mysql
candidate_master=0
[server4]
hostname=192.168.5.20
ssh_port=22
master_binlog_dir=/var/lib/mysql
candidate_master=0
[server5]
hostname=192.168.5.21
ssh_port=22
master_binlog_dir=/var/lib/mysql
candidate_master=0
进行mha检测
masterha_check_ssh --conf=/etc/mha/mha.cnf
masterha_check_repl--conf=/etc/mha/mha.cnf
启动mha
nohup masterha_manager--conf=/etc/mha/mha.cnf > /tmp/mha_manager.log < /dev/null 2>&1&
补充脚本
查看master_Host 是那台主机
#!/bin/bash
for i in 17 18 19 20 21
do
MASTER=`ssh192.168.5.$i "mysql -u root -p123 -e ‘show slave status \G‘ | grep"Master_Host""`
echo-e "Host=192.168.5.$i $MASTER"
done
十、 安装haproxy软件
1 安装haproxy软件
cd haproxy/
tar xf haproxy-1.5.3.tar -C /usr/src/
cd /usr/src/
cd haproxy-1.5.3/
make TARGET=linux26PRETIX=/usr/local/haproxy
make install PREFIX=/usr/local/haproxy
cd /usr/src/haproxy-1.5.3/
cd examples/
cp haproxy.init /etc/init.d/haproxy
chmod 755 /etc/init.d/haproxy
10.2设置配置文件
mkdir /etc/haproxy
mkdir /usr/share/haproxy
ln -s /usr/local/haproxy/sbin/* /usr/sbin/
vim /usr/local/haproxy/haproxy.cfg
global
log 127.0.0.1 local0
log 127.0.0.1 local1 notice
#log loghost local0 info
maxconn 4096
chroot /usr/share/haproxy
uid 99
gid 99
daemon
#debug
#quiet
defaults
log global
mode http
#option httplog
option dontlognull
retries 3
option redispatch
maxconn 2000
contimeout 5000
clitimeout 50000
srvtimeout 50000
listen MySQL 0.0.0.0:3306
mode tcp
maxconn 200
balance roundrobin
option mysql-check user root
server mysql_1 192.168.5.19:3306 inter 1s rise 2 fall 2
server mysql_2 192.168.5.20:3306 inter 1s rise 2 fall 2
server mysql_2 192.168.5.21:3306 inter 1s rise 2 fall 2
listen admin_status
mode http
bind 0.0.0.0:8899
option httplog
log global
stats enable
stats refresh 10s
stats hide-version
stats realm Haproxy\ Statistics
stats uri /admin-status
stats auth admin:123456
stats admin if TRUE
ln -s /usr/local/haproxy/haproxy.cfg /etc/haproxy/
10.3开启haproxy
service haproxy start
十一、实现MySQL高可用和读写分离
11.1 设置“读”VIP
ifconfig eth0:1 192.168.5.100/24
11.2 设置“写”VIP
#!/bin/bash
VIP=192.168.5.200
NETMASK=255.255.255.0
MUSER=root
MPW=123
MYSQL_IP="192.168.5.17 192.168.5.18"
NIC=eth0
#~~~~~~main program~~~~~
#check_master_mysql
check_master(){
for IP in $MYSQL_IP
do
ssh$IP "mysql -u $MUSER -p$MPW -e ‘show slave status \G‘ | grep -w‘Slave_IO_Running‘"&>/dev/null
if[ $? -eq 1 ];then
MY_master=$IP
fi
done
}
#eheck_master
#echo $MY_master
#set_VIP(){
#ssh $MY_master "ip add showeth0" | grep inet |grep "$VIP"
# if[ $? -ne 0 ];then
# ifconfig$NIC:200 $VIP netmask $NETMASK
# fi
#}
VIP(){
for IP in $MYSQL_IP
do
ssh$IP "ip add show eth0" | grep inet | grep "$VIP"&>/dev/null
if[ $? -eq 0 ] && [ $MY_master != "$IP" ];then
ssh$IP "ifconfig $NIC:200 down"
elif[ $? -eq 1 ] && [ $MY_master == "$IP" ];then
ssh$IP "ifconfig $NIC:200 $VIP netmask $NETMASK up"
fi
done
}
while true
do
check_master
VIP
sleep1
done
chmod 755 check_mysql.txt
nohup ./check_mysql.txt &
本文出自 “运维之道” 博客，请务必保留此出处http://lrtao2010.blog.51cto.com/10425744/1702249
标签：mysql
原文地址：http://lrtao2010.blog.51cto.com/10425744/1702249
