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者：split_two
环境四台机器都是RedHat4.8（64位）版本：
IP地址 用处 1、MASTER上安装haproxy
复制代码 代码如下:
wget http://haproxy.1wt.eu/download/1.3/src/haproxy-1.3.20.tar.gz /root 解压到当前目录 tar zxvf haproxy-1.3.20.tar.gz 进到此目录 cd haproxy-1.3.20 编译及安装，安装到/usr/local目录，但是安装完此目录下没有haproxy文件夹，我也很奇怪！ make TARGET=linux26 prefix=/usr/local/haproxy install 但是出来的结果会提示如下信息
install -d /usr/local/sbin
提示你启动haproxy在sbin目录，其余的在doc目录
复制代码 代码如下:
vi haproxy.cfg global log 127.0.0.1 local0 maxconn 4096 chroot /usr/local/doc/haproxy uid 501 gid 501 daemon nbproc 1 pidfile /usr/local/doc/haproxy/haproxy.pid defaults log 127.0.0.1 local3 mode http option httplog option httpclose option dontlognull option forwardfor option redispatch retries 2 maxconn 2000 balance roundrobin stats uri /haproxy-status 查看状态 stats hide-version 隐藏haproxy版本 stats realm Gemini\ Haproxy 查看状态需要口令 stats auth admin:admin 用户名和密码 contimeout 5000 clitimeout 50000 srvtimeout 50000 listen web_proxy 192.168.2.100:80 server web1 192.168.5.54:8080 cookie app1inst1 check inter 2000 rise 2 fall 5 server web2 192.168.5.57:8080 cookie app1inst2 check inter 2000 rise 2 fall 5
2、MASTER安装keepalived
复制代码 代码如下:
/* typedef __u16 __bitwise __sum16; typedef __u32 __bitwise __wsum; */ cd keepalived-1.1.15 ./configure make make install 将keepalived作为系统服务启动
cp /usr/local/etc/rc.d/init.d/keepalived /etc/init.d/
复制代码 代码如下:
! Configuration File for keepalived global_defs { router_id LVA_DEVEL } vrrp_script chk_http_port { script "/root/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 { 192.168.2.100 } } 上面调用了一个脚本check_haproxy.sh，内容如下：
复制代码 代码如下:
#!/bin/bash A=`ps -C haproxy --no-header | wc -l` if [ $A -eq 0 ];then /usr/local/sbin/haproxy -f /usr/local/doc/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
复制代码 代码如下:
global log 127.0.0.1 local0 maxconn 4096 chroot /usr/local/doc/haproxy uid 501 gid 501 daemon nbproc 1 pidfile /usr/local/doc/haproxy/haproxy.pid defaults log 127.0.0.1 local3 mode http option httplog option httpclose option dontlognull option forwardfor option redispatch retries 2 maxconn 2000 balance roundrobin stats uri /haproxy-status stats hide-version stats realm Gemini\ Haproxy stats auth admin:admin contimeout 5000 clitimeout 50000 srvtimeout 50000 listen web_proxy 192.168.2.100:80 server web1 192.168.5.54:8080 cookie app1inst1 check inter 2000 rise 2 fall 5 server web2 192.168.5.57:8080 cookie app1inst2 check inter 2000 rise 2 fall 5 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
复制代码 代码如下:
! Configuration File for keepalived global_defs { router_id LVA_DEVEL } vrrp_script chk_http_port { script "/root/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 { 192.168.2.100 } } 调用脚本check_haproxy.sh内容：
复制代码 代码如下:
#!/bin/bash A=`ip a | grep 192.168.2.100 | wc -l` B=`ps -ef | grep haproxy | grep -v grep | awk '{print $2}'` if [ $A -gt 0 ];then /usr/local/sbin/haproxy -f /usr/local/doc/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apache 登录192.168.5.54上操作： echo 'this is 192.168.5.54!' > /var/www/html/index.html 修改/etc/httpd/conf/httpd.conf文件的监听端口为8080 sed -i 's/Listen 80/Listen 8080/g' /etc/httpd/conf/httpd.conf /etc/init.d/httpd start 登录192.168.5.57上操作： echo 'Hello,This is 192.168.5.57!' > /var/www/html/index.html 修改/etc/httpd/conf/httpd.conf文件的监听端口为8080 sed -i 's/Listen 80/Listen 8080/g' /etc/httpd/conf/httpd.conf /etc/init.d/httpd start 6、测试步骤 启动MASTER上的keepalived服务，再启动BACKUP上的keepalived服务。 确定MASTER上是否有192.168.2.100地址，用ip a查看即可！ 然后手动杀掉MASTER上的haproxy进程，看看是否能马上恢复进程？ 停止MASTER上的keepalived服务，确认BACKUP是否接管VIP地址？ 最后再启动MASTER上的keepalived服务，再确认MASTER是否再接管VIP地址？ 总结：我这测试都没问题，如果有问题请给我留言！ 原文：http://blog.chinaunix.net/uid-23916356-id-3387261.html (责任编辑：IT) |