haproxy+keepalived构建高可用负载均衡

sdchy

　　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 {   
    
  •      gaoming@123.com   
    
  •    }   
    
  •    notification_email_from gaoming@123.com   
    
  •    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:  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