mysql+haproxy+keepalive实现读在salve的负载均衡

Keepalive 安装

下载地址：http://www.keepalived.org/download.html

（1）解压缩软件

[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

（2）依赖包的安装

[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

（3）安装keepalive软件

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

[root@plvskygis01]#make &make install

（4）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 ]# chkconfig keepalived on

[root@plvskygis01 ]# mkdir /etc/keepalived

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

（5）修改配置文件

keepalive 主节点配置文件

! 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 MASTER
interface eth0
virtual_router_id 220
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
unicast_peer {
172.17.117.13
172.17.117.14
}
virtual_ipaddress {
172.17.117.31
}
track_script {
check_haproxy
}
notify "/etc/keepalived/notify.sh"

}

keepalive备节点配置文件

! 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 {
172.17.117.13
172.17.117.14
}
virtual_ipaddress {
172.17.117.31
}

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

cat 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
fi
fi

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

（6）Keepalive 日志的配置

修改日志存放的位置

cat /etc/rsyslog.conf

添加

local0.* /usr/local/keepalived/log/keepalive.log

vi /etc/sysconfig/keepalived

KEEPALIVED_OPTIONS="-D"

改为

KEEPALIVED_OPTIONS="-D -S 0"

（7）启动keepalive

[root@plvskygis01 keepalived]# service keepalived start

Starting keepalived: [ OK ]

Hapoxy 安装

（1）安装haproxy 软件

[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

（2）编译软件

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

（3）编译完后，会在/usr/local/haproxy下产生文件

[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

（4）创建用户

[root@plvskygis01 haproxy]# useradd haproxy

（5）haproxy 参数文件配置

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 172.17.103.20:11856

mode tcp

balance roundrobin

#balance leastconn

server ss2 172.17.103.27:3306 check port 3306 maxconn 500 rise 3 fall 3

server ss3 172.17.103.28:3306 check port 3306 maxconn 500 rise 3 fall 3

server ss4 172.17.103.29:3306 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

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

Configuration file is valid

（6）启动服务

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

（7）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

（8）设置参数

[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

（8）Haproxy 日志配置

vi haproxy.conf(在default处添加如下信息)
defaults
log global
option httplog
log 127.0.0.1 local2

vi /etc/rsyslog.conf(添加如下内容)

#由于haproxy的日志是用udp传输的,所以要启用rsyslog的udp监听

$ModLoad imudp

$UDPServerRun 514
local2.* /usr/local/haproxy/log/haproxy.log

vi /etc/sysconfig/rsyslog

把SYSLOGD_OPTIONS="-m 0"
改成 SYSLOGD_OPTIONS="-r -m 0 -c 2"

相关解释说明:
-r:打开接受外来日志消息的功能,其监控514 UDP端口;
-x:关闭自动解析对方日志服务器的FQDN信息,这能避免DNS不完整所带来的麻烦;
-m:修改syslog的内部mark消息写入间隔时间(0为关闭),例如240为每隔240分钟写入一次"--MARK--"信息;
-h:默认情况下,syslog不会发送从远端接受过来的消息到其他主机,而使用该选项,则把该开关打开,所有
接受到的信息都可根据syslog.conf中定义的@主机转发过去

配置完毕后重启rsyslogd和haproxy即可.

###重启服务

systemctl restart haproxy

service rsyslog restart

测试mysql代理转发功能

/mysql/mysql5635/bin/mysql -uchecksums -pchecksums -h172.17.103.20 -P11851 -e' select @@port';