haproxy+keepalived构建高可用负载均衡

web1 IP 192.168.0.47

web2 IP 192.168.0.48

haproxy_master 192.168.0.200

haproxy_backup 192.168.0.199

VIP 192.168.0.155

一.安装keepalived

 

• #wget http://www.keepalived.org/software/keepalived-1.1.15.tar.gz
• #tar zxvf keepalived-1.1.15.tar.gz
• #cd keepalived-1.1.15
• #./configure
• #make
• #make install 将keepalived做成启动脚务

   

  #cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/

  #cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/

  #mkdir /etc/keepalived

  #cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/

  #cp /usr/local/sbin/keepalived /usr/sbin/

  配置keepalived.conf

  #vim /etc/keepalived/keepalived.conf

  print?! Configuration File for keepalived
  
  global_defs {
     notification_email {
       [email protected]
     }
     notification_email_from [email protected]
     smtp_server 192.168.200.1
     smtp_connect_timeout 30
     router_id LVS_DEVEL
  }
  
  vrrp_instance VI_1 {
      state MASTER    #备用服务器上改为 BACKUP
      interface eth0
      virtual_router_id 51
      priority 100    #备用服务器上改为99
      advert_int 1
      authentication {
          auth_type PASS
          auth_pass 1111
      }
      virtual_ipaddress {
          192.168.0.155/24 dev eth0 scope global
      }
  }

启动keepalived

 

service keepalived start

启动之后可以用ip add 查看网卡多了一条192.168.0.155的IP

eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:0c:29:ff:6c:c7 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.200/24 brd 192.168.0.255 scope global eth0
inet 192.168.0.155/24 scope global secondary eth0
inet6 fe80::20c:29ff:feff:6cc7/64 scope link
valid_lft forever preferred_lft forever

说明keepalived启动成功，配置生效

二.安装haproxy

#wget http://haproxy.1wt.eu/download/1.3/src/haproxy-1.3.20.tar.gz

#uname -a

Linux ip1 2.6.18-194.el5 #1 SMP Fri Apr 2 14:58:35 EDT 2010 i686 i686 i386 GNU/Linux

#make TARGET=linux26 prefix=/usr/local/haproxy install
#cd /usr/local/haproxy

配置haproxy
#vim haproxy.conf

[php] view plaincopyprint?global
     maxconn  5120
     chroot   /usr/local/haproxy
     uid      100
     gid      100
     daemon
     quiet
     nbproc   2
     pidfile  /usr/local/haproxy/haproxy.pid
 ########################################################

defaults
     log     global
     log     127.0.0.1  local3
     mode    http
     option  httplog
     option  dontlognull
     option  redispatch
     retries 3

    maxconn 3000
     contimeout 5000
     clitimeout 50000
     srvtimeout 50000
     stats enable
     stats uri /admin
     stats auth admin:admin
     stats realm Haproxy \ statistic
 ##########################################################

frontend www.gaoming.com
     bind *:80
     default_backend server_pool
backend server_pool
     mode    http
     balance roundrobin
     option  forwardfor
     option  httpclose
     option  httpchk GET /index.html
 server web1 192.168.0.48:80 check inter 5000 fall 1 rise 2
 server web1 192.168.0.47:80 check inter 5000 fall 1 rise 2

haproxy的配置2台机器相同

 

启动haproxy

#/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy.conf

域名解析到VIP上，用户访问VIP会负载到后端2台WEB上

测试高可用，关掉主haproxy，备用的会接管VIP