keepalive+haproxy +mysql 实现读负载均衡

Keepalive 安装

[root@plvskygis01 tmp]# tar zxf keepalived-2.0.6.tar.gz

[root@plvskygis01 tmp]# cd keepalived-2.0.6

[root@plvskygis01 keepalived-2.0.8]# pwd

/tmp/keepalived-2.0.6

[root@plvskygis01 keepalived-2.0.6]# yum install openssl openssl-devel

[root@plvskygis01 keepalived-2.0.6]# yum install -y libnfnetlink-devel

[root@plvskygis01 keepalived-2.0.6]# yum install gcc libnl3-devel net-snmp-devel

[root@plvskygis01]#./configure --with-init=SYSV --prefix=/usr/local/keepalived

[root@plvskygis01]#make &make install

整理管理文件：

[root@plvskygis01]# cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

[root@plvskygis01]# cp /usr/local/keepalived/sbin/keepalived /usr/sbin/

[root@plvskygis01]#cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/

[root@plvskygis01]#cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/rc.d/init.d

[root@phapxykdgis01 haproxy]# chmod +x /etc/init.d/keepalived

[root@plvskygis01 ]# mkdir /etc/keepalived

[root@plvskygis01]#cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/

[root@plvskygis01 keepalived]# chkconfig keepalived on

[root@plvskygis01 keepalived]# chmod +x /etc/init.d/keepalived

[root@plvskygis01 keepalived]# service keepalived start

Starting keepalived: [ OK ]

keepalive配置文件

keepalived 配置

keepalive 主节点

[root@plvskygis01 keepalived]# vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

notification_email {

[email protected]

}

notification_email_from [email protected]

smtp_server 172.0.0.1

smtp_connect_timeout 30

router_id LVS_DEVEL

vrrp_skip_check_adv_addr

! vrrp_strict

vrrp_garp_interval 0

vrrp_gna_interval 0

}

vrrp_script check_haproxy {

script "/etc/keepalived/check_haproxy.sh"

interval 5

weight 2

fall 3

rise 1

}

vrrp_instance VI_1 {

state MASTER

interface eth0

virtual_router_id 220

priority 100

advert_int 1

authentication {

auth_type PASS

auth_pass 1111

}

#为避免同一个局域网中有多个keepalived组中的多播相互响应，采用单播通信

unicast_peer {

172.17.103.218

172.17.103.219

}

virtual_ipaddress {

172.17.103.220

}

track_script {

check_haproxy

}

notify "/etc/keepalived/notify.sh"

}

备keepalive

[root@phapxykygis02 keepalived]# cat keepalived.conf
! Configuration File for keepalived

global_defs {
notification_email {
[email protected]
[email protected]
[email protected]
}
notification_email_from [email protected]
smtp_server 172.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
vrrp_skip_check_adv_addr
! vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}

vrrp_script check_haproxy {
script "/etc/keepalived/check_haproxy.sh"
interval 5
weight 2

}

vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 220
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}

unicast_peer {
172.17.103.218
172.17.103.219
}
virtual_ipaddress {
172.17.103.220
}

track_script {
check_haproxy
}
notify_master "/etc/keepalived/notify.sh"
}

keepalive 调用的配置文件

[root@plvskygis01 keepalived]# cat /etc/keepalived/check_haproxy.sh

#!/bin/bash

A=`ps -C haproxy --no-header | wc -l`

if [ $A -eq 0 ]

then service haproxy start

sleep 3

if [ `ps -C haproxy --no-header | wc -l ` -eq 0 ]

then service keepalived stop

[root@phapxykygis02 keepalived]# cat notify.sh

#!/bin/bash

# for ANY state transition.

# "notify" script is called AFTER the

# notify_* script(s) and is executed

# with 3 arguments provided by keepalived

# (ie don't include parameters in the notify line).

# arguments

# $1 = "GROUP"|"INSTANCE"

# $2 = name of group or instance

# $3 = target state of transition

# ("MASTER"|"BACKUP"|"FAULT")

TYPE=$1

NAME=$2

STATE=$3

case $STATE in

"MASTER") echo "I'm the MASTER! Whup whup." > /usr/local/keepalived/log/keepalive.log

exit 0

;;

"BACKUP") echo "Ok, i'm just a backup, great." > /usr/local/keepalived/log/keepalive.log

exit 0

;;

"FAULT") echo "Fault, what ?" > /usr/local/keepalived/log/keepalive.log

exit 0

;;

*) echo "Unknown state" > /usr/local/keepalived/log/keepalive.log

exit 1

;;

Esac

Hapoxy 安装

[root@plvskygis01 haproxy-1.8.14]# uname -a

Linux plvskygis01 2.6.32-642.el6.x86_64 #1 SMP Wed Apr 13 00:51:26 EDT 2016 x86_64 x86_64 x86_64 GNU/Linux

安装

make TARGET=linux26 ARCH=x86_64 PREFIX=/usr/local/haproxy

其中TARGET表示OS的内核版本，ARCH表示OS的位数，PREFIX表示haprxoy的安装路径。

make install PREFIX=/usr/local/haproxy

[root@plvskygis01 haproxy]# ll

total 12

drwxr-xr-x 3 root root 4096 Oct 26 15:08 doc

drwxr-xr-x 2 root root 4096 Oct 26 15:08 sbin

drwxr-xr-x 3 root root 4096 Oct 26 15:08 share

创建用户

[root@plvskygis01 haproxy]# useradd haproxy

haproxy 参数文件配置

[root@phapxykygis01 ~]# cat /etc/haproxy/haproxy.cfg

global

log 127.0.0.1 local2

chroot /usr/local/haproxy

pidfile /var/run/haproxy.pid

maxconn 4000

user haproxy

group haproxy

daemon

stats socket /usr/local/haproxy/stats

defaults

mode tcp

log global

log 127.0.0.1 local2

option dontlognull

option redispatch

option abortonclose

retries 3

timeout http-request 10s

timeout queue 1m

timeout connect 10s

timeout client 20m

timeout server 20m

timeout http-keep-alive 10s

timeout check 10s

maxconn 600

listen stats

mode http

bind *:8080

stats enable

stats hide-version

stats uri /haproxy-stats

stats realm Haproxy\ Statistics

stats auth admin:admin

stats admin if TRUE

stats refresh 30s

option forwardfor

# default_backend mysql

listen mysql

bind 172.17.103.220:11856

mode tcp

balance roundrobin

#balance leastconn

server ss2 172.17.103.217:3306 check port 3306 maxconn 500 rise 3 fall 3

server ss3 172.17.103.218:3306 check port 3306 maxconn 500 rise 3 fall 3

server ss4 172.17.103.219:3306 check port 3306 maxconn 500 rise 3 fall 3

option forwardfor
#如果后端服务器需要获得客户端真实ip需要配置的参数，必须要放在listen模块下，mode必须是mode http

检测文件内容是否正常

[root@plvskygis01 haproxy]# /usr/local/haproxy/sbin/haproxy -f /etc/haproxy/haproxy.cfg -c

Configuration file is valid

启动服务

/usr/local/haproxy/sbin/haproxy -f /etc/haproxy/haproxy.cfg

设置启动服务

[root@plvskygis01 examples]# cp haproxy.init /etc/rc.d/init.d/

[root@plvskygis01 examples]#mv /etc/init.d/haproxy.init /etc/init.d/haproxy

[root@plvskygis02 examples]# chmod +x /etc/rc.d/init.d/haproxy

[root@plvskygis01 ]#vi /etc/init.d/haproxy

改成

BIN=/usr/local/haproxy/sbin/$BASENAME

或者cp /usr/local/haproxy/sbin/haproxy /usr/sbin/haproxy

[root@phapxykygis01 ~]# cat /etc/sysctl.conf

net.ipv4.ip_forward = 1
开启IP转发功能

net.ipv4.ip_nonlocal_bind = 1
开启允许绑定非本机的IP