HAProxy+Keepalived实现MySQL的高可用负载均衡
当前环境说明
A:10.10.99.180(MySQLMaster)----|
|________VIP(10.10.99.103)
B:10.10.99.108(MySQLSlave)------|
C:10.10.105.11(MySQLSlave)
D:10.10.105.23(HAProxy+Keepalived)
E:10.10.105.24(HAProxy+Keepalived)
VIP:10.10.105.30
如下操作在10.10.105.23和10.10.105.24上都要进行
1、调整内核参数,添加非本地IP绑定支持
#vi/etc/sysctl.conf
net.ipv4.ip_nonlocal_bind=1
#sysctl–p
2、安装haproxy和keepalived
yum-yinstallhaproxykeepalived
3、配置keepalived.conf文件
#vi/etc/haproxy/haproxy.cfg
!ConfigurationFileforkeepalived
global_defs{
notification_email{
}
smtp_server127.0.0.1
smtp_connect_timeout30
router_idLVS_DEVEL
}
vrrp_instanceVI_1{
stateMASTER#10.10.105.24设置为BACKUP
interfaceeth0
virtual_router_id51
realserver10.10.105.23#10.10.105.24改自己的ip
priority90#10.10.105.24设置为80
advert_int1
authentication{
auth_typePASS
auth_pass111111
}
virtual_ipaddress{
10.10.105.30
}
4、配置haproxy
#vi/etc/haproxy/haproxy.cfg
#thisconfigneedshaproxy-1.1.28orhaproxy-1.2.1
global
#log127.0.0.1local0
log127.0.0.1local1notice
maxconn5000
uid99
gid99
daemon
pidfile/var/run/haproxy.pid
defaults
logglobal
modehttp
#optionhttplog
optiondontlognull
retries3
optionredispatch
maxconn2000
contimeout5000
clitimeout50000
srvtimeout50000
listenMYSQL10.10.105.30:3306
modetcp
maxconn2000
balanceroundrobin
servermysql-10.10.99.10810.10.99.108:3306checkinter5000fall1rise2
servermysql-10.10.105.1110.10.105.11:3306checkinter5000fall1rise2
srvtimeout20000
listenstats_auth10.10.105.23:80
#listenstats_auth10.10.105.24:80#backupconfig
statsenable
statsuri/korea
statsauthadmin:12345
statsadminifTRUE
5、分别启动haproxy和keepalived
[root@vm-105-23~]#/etc/init.d/haproxyrestart&&/etc/init.d/keepalivedrestart
Stoppinghaproxy:[OK]
Startinghaproxy:[OK]
Stoppingkeepalived:[OK]
Startingkeepalived:[OK]
6、查看vip是否起来
[root@vm-105-23~]#ipaddr
1:lo:
link/loopback00:00:00:00:00:00brd00:00:00:00:00:00
inet127.0.0.1/8scopehostlo
inet6::1/128scopehost
valid_lftforeverpreferred_lftforever
2:eth0:
link/ether52:54:00:6c:d5:95brdff:ff:ff:ff:ff:ff
inet10.10.105.23/24brd10.10.105.255scopeglobaleth0
inet10.10.105.30/32scopeglobaleth0
inet6fe80::5054:ff:fe6c:d595/64scopelink
valid_lftforeverpreferred_lftforever
7、因为我们知道crontab的颗粒细化度只有1分钟，不能细化到秒，所以我们编写haproxy循环检测脚本，并且放入后台运行
cd/home/ops/scripts
nohupshcheckhapid.sh&
vicheckhapid.sh
#!/bin/bash
whiletrue
do
HA=`ps-ef|grephaproxy|grep-vgrep|wc-l`
if[$HA-eq0];
then
/etc/init.d/haproxystart
echo"">/dev/null
sleep2
if[$HA-eq0];
then
/etc/init.d/keepalivedstop
fi
fi
sleep2
done
8、高可用测试
在10.10.105.23上执行ipaddr|grepeth0
[root@vm-105-23~]#ipaddr|grepeth0
eth0:
inet10.10.105.23/24brd10.10.105.255scopeglobaleth0
inet10.10.105.30/32scopeglobaleth0
关闭haproxy再打开一个终端继续执行ipaddr|grepeth0,观测
可以发现当无法迅速启动haproxy进程之后，循环脚本会杀死keepalived进程，实现vip的迁移
10.10.105.30迅速转移到10.10.105.24这台备机上！
9、mysql测试
程序在读写分离之后，所有的select语句可以直接通过访问10.10.105.303306来进行工作，后端的mysql服务器可以实现并发读操作
[root@vm-105-23scripts]#mysqlslap-h10.10.105.30--concurrency=100--iterations=1--create-schema='ultrax'--query='select*frompre_home_share;'--number-of-queries=10--debug-info-ubbs-piz3n3s0ft
Benchmark
Averagenumberofsecondstorunallqueries:1.028seconds
Minimumnumberofsecondstorunallqueries:1.028seconds
Maximumnumberofsecondstorunallqueries:1.028seconds
Numberofclientsrunningqueries:100
Averagenumberofqueriesperclient:0
Usertime0.02,Systemtime0.08
Maximumresidentsetsize6996,Integralresidentsetsize0
Non-physicalpagefaults1584,Physicalpagefaults0,Swaps0
Blocksin0out0,Messagesin0out0,Signals0
Voluntarycontextswitches1280,Involuntarycontextswitches91
10、效果图
可以访问http://10.10.105.23/korea
用户名admin
密码12345