环境四台机器都是CentOS5.5(32位)版本:
IP地址 用处
192.168.1.10 MASTER
192.168.1.11 BACKUP
192.168.1.101 负载A
192.168.1.102 负载B
192.168.1.20 VIP
1、MASTER上安装haproxy
检查主机上是否有yum Extra Packages for Enterprise Linux (EPEL)
#yum list |grep epel-release
epel-release.noarch 5-4
如果有就安装:
#yum install epel-release
查看是否有yum haproxy
#yum list |grep haproxy
haproxy.i386 1.3.26-1.el5
有就安装:
#yum install haproxy
编辑haproxy主配置文件
#vi /etc/haproxy/haproxy.cfg
#——————————————————————— # Example configuration for a possible web application. See the # full configuration options online. # # http://haproxy.1wt.eu/download/1.3/doc/configuration.txt # #———————————————————————
#——————————————————————— # Global settings #——————————————————————— global log 127.0.0.1 local2 chroot /var/lib/haproxy #安装目录 pidfile /var/run/haproxy.pid maxconn 4000 #最大连接数 user nobody group nobody daemon #守护进程运行
#——————————————————————— # common defaults that all the ‘listen’ and ‘backend’ sections will # use if not designated in their block #——————————————————————— defaults mode http #7层,默认的模式mode {tcp|http|health},tcp是4层,http是7层 log global option dontlognull #来防止记录 Alteo(4层负载均衡)发出的健康检测,如果一个 session 交互没有数据,这个 session就不会被记录 option httpclose #主动关闭http通道,HA-Proxy不支持keep-alive模式 option httplog #http 日志格式 option forwardfor #后端服务器需要获得客户端的真实IP,将从Http Header中获得客户端IP option redispatch #serverId对应的服务器挂掉后,强制定向到其他健康的服务器 timeout connect 10000 # default 10 second time out if a backend is not found timeout client 300000 #客户端超时(毫秒) timeout server 300000 #服务器超时(毫秒) maxconn 60000 #最大连接数 retries 3
#——————————————————————— # main frontend which proxys to the backends #——————————————————————— frontend main *:80 # acl url_static path_beg -i /static /images /javascript /stylesheets # acl url_static path_end -i .jpg .gif .png .css .js
# use_backend static if url_static mode http default_backend app
#——————————————————————— # static backend for serving up images, stylesheets and such #——————————————————————— #backend static #balance roundrobin #server static 127.0.0.1:4331 check
#——————————————————————— # round robin balancing between the various backends #——————————————————————— backend app balance roundrobin server app1 192.168.1.101:80 cookie 1 check inter 2000 rise 3 fall 3 server app2 192.168.1.102:80 cookie 1 check inter 2000 rise 3 fall 3
#——————————————————————— # check status #——————————————————————— listen secure #自定义一个frontend,也可以放在listen或者backend中 bind *:8080 #监听的ip端口号 stats enable #开关 stats uri /admin?admin #访问的uri ip:8080/admin?admin stats auth admin:admin #认证用户名和密码 stats hide-version #隐藏HAProxy的版本号 stats refresh 5s #统计页面自动刷新时间
多后端配置文件:
global
log 127.0.0.1 local0 notice
maxconn 20480
ulimit-n 65535
uid nobody
gid nobody
daemon
nbproc 2
pidfile /var/run/haproxy.pid
defaults
log global
mode http
option httplog
option httpclose
option forwardfor
option dontlognull
option redispatch
retries 3
balance roundrobin
timeout connect 5000
timeout client 50000
timeout server 50000
##frontend settings ######
frontend test
bind 192.168.1.241:80
mode http
#capture request header Host len 32
#log-format %hr\ %r\ %st\ %B\ %Tr
#http-request add-header X-Req %[env(USER)]
option httpclose
option httplog
option dontlognull
option forwardfor
default_backend x.yxpai.com
##setting ACLs ##
#acl ua_moz hdr_reg(User-Agent) -i ^iphone.*
acl host_x hdr_reg(host) -i ^(x.yxpai.com)$
#http-request deny if host_x
##applying ACLs#####
use_backend x.yxpai.com if host_x
#use_backend moz if ua_moz
#redirect code 301 prefix http://192.168.1.64 if ua_moz
###testing how to modify HTTP response HEADER##
##setting up backends###
backend x.yxpai.com
option httplog
option httpclose
option forwardfor
http-response set-header X-Server-Port %[dst_port]
#http-response set-header X-Handled-By %[env(USER)]
http-response add-header X-Cached %[env(HOSTNAME)]
http-response replace-value Server ^nginx.*$ Apache2
http-response replace-header X-Powered-By ^.*$ PHP
http-response del-header X-Powered-By
http-response del-header Server
#http-response replace-value Cache-control ^public$ private
cookie PHPSESSID insert indirect nocache ##setting session sticky
server app1 192.168.1.102:80 maxconn 3000 cookie app1 check inter 5s rise 3 fall 3
backend moz
balance roundrobin
option httplog
option httpclose
option forwardfor
server app1 192.168.1.101:80 maxconn 3000 cookie app1 check inter 5s rise 3 fall 3
# option httpchk GET /index.html
listen status *:8080
stats enable
stats uri /stats
stats auth admin:123456
#stats admin if TRUE
stats realm (Haproxy\statistic)
2、MASTER安装keepalived
#cd /home/sandea/
#wget http://www.keepalived.org/software/keepalived-1.1.17.tar.gz
#tar zxvf keepalived-1.1.17.tar.gz
#cd keepalived-1.1.17
#./configure prefix=/
#make&&make install
#vi /etc/keepalived/keepalived.conf内容如下:
! Configuration File for keepalived global_defs { router_id LVA_DEVEL } vrrp_script chk_http_port { script “/etc/keepalived/check_haproxy.sh” interval 2 weight 2 } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } track_script { chk_http_port } virtual_ipaddress { 192.168.1.20 } }
创建上面调用了一个脚本check_haproxy.sh:
#vi /etc/keepalived/check_haproxy.sh
上面调用了一个脚本check_haproxy.sh,内容如下:
#!/bin/bash A=`ps -C haproxy –no-header | wc -l` if [ $A -eq 0 ];then /usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg echo “haproxy start” sleep 3 if [ `ps -C haproxy –no-header | wc -l` -eq 0 ];then /etc/init.d/keepalived stop echo “keepalived stop” fi fi
3、BACKUP上安装haproxy,步骤就不详细介绍,和MASTER上面一样的。
haproxy.conf内容如下
#——————————————————————— # # http://haproxy.1wt.eu/download/1.3/doc/configuration.txt # #———————————————————————
#——————————————————————— # Global settings #——————————————————————— global pidfile /var/run/haproxy.pid maxconn 4000 user nobody group nobody daemon
#——————————————————————— # common defaults that all the ‘listen’ and ‘backend’ sections will # use if not designated in their block #——————————————————————— defaults mode http log global option dontlognull option httpclose option httplog option forwardfor option redispatch maxconn 60000 retries 3
#——————————————————————— # main frontend which proxys to the backends #——————————————————————— frontend main *:80 # acl url_static path_beg -i /static /images /javascript /stylesheets # acl url_static path_end -i .jpg .gif .png .css .js
# use_backend static if url_static mode http default_backend app
#——————————————————————— # static backend for serving up images, stylesheets and such #——————————————————————— #backend static #balance roundrobin #server static 127.0.0.1:4331 check
#——————————————————————— # round robin balancing between the various backends #——————————————————————— backend app balance roundrobin server app1 192.168.1.101:80 cookie 1 check inter 2000 rise 3 fall 3 server app2 192.168.1.102:80 cookie 1 check inter 2000 rise 3 fall 3
#——————————————————————— # check status #——————————————————————— listen secure #自定义一个frontend,也可以放在listen或者backend中 bind *:8080 #监听的ip端口号 stats enable #开关 stats uri /admin?admin #访问的uri ip:8080/admin?admin stats auth admin:admin #认证用户名和密码 stats hide-version #隐藏HAProxy的版本号 stats refresh 5s #统计页面自动刷新时间
4、BACKUP上安装keepalived,步骤也不多介绍,keepalived.conf文件内容就两处有变化,红色字体标出
! Configuration File for keepalived global_defs { router_id LVA_DEVEL } vrrp_script chk_http_port { script “/etc/keepalived/check_haproxy.sh” interval 2 weight 2 } vrrp_instance VI_1 { state BACKUP interface eth0 virtual_router_id 51 priority 99 advert_int 1 authentication { auth_type PASS auth_pass 1111 } track_script { chk_http_port } virtual_ipaddress { 192.168.1.20 } }
创建上面调用了一个脚本check_haproxy.sh:
#vi /etc/keepalived/check_haproxy.sh
调用脚本check_haproxy.sh内容:
#!/bin/bash A=`ip a | grep 192.168.1.20 | wc -l` B=`ps -ef | grep haproxy | grep -v grep | awk ‘{print $2}’` if [ $A -gt 0 ];then /usr/sbin/haproxy -f /etc/haproxy/haproxy.cfg else kill -9 $B fi 5、两台负载机器我就不多介绍了,用的是系统自带的nginx+PHP
可以查看:http://www.cnblogs.com/sandea/p/4557540.html
6、测试步骤
启动MASTER上的keepalived服务,再启动BACKUP上的keepalived服务。
#ip add
1.再两台机器上分别执行ip add 主: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:0c:29:98:cd:c0 brd ff:ff:ff:ff:ff:ff inet 192.168.1.10/24 brd 192.168.1.255 scope global eth0 inet 192.168.1.20/32 scope global eth0 inet6 fe80::20c:29ff:fe98:cdc0/64 scope link valid_lft forever preferred_lft forever
备: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:0c:29:a6:0c:7e brd ff:ff:ff:ff:ff:ff inet 192.168.1.11/24 brd 255.255.255.254 scope global eth0 inet6 fe80::20c:29ff:fea6:c7e/64 scope link valid_lft forever preferred_lft forever
确定MASTER上是否有192.168.1.20地址!
2.停掉主上的haproxy,3秒后keepalived会自动将其再次启动
3.停掉主的keepalived,备机马上接管服务 备: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:0c:29:a6:0c:7e brd ff:ff:ff:ff:ff:ff inet 192.168.1.11/24 brd 255.255.255.254 scope global eth0 inet 192.168.1.20/32 scope global eth0 inet6 fe80::20c:29ff:fea6:c7e/64 scope link valid_lft forever preferred_lft forever
4、在浏览器地址栏输入:
http://192.168.1.20
看访问是否成功
5、监控haproxy
http://192.168.1.10:8080/admin?admin
或者
http://192.168.1.11:8080/admin?admin
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