keepalived安装配置范例

  keepalived官方地址是最新版本为keepalived-1.2.19, 安装步骤如下：

Master: 192.168.10.46
Backup: 192.168.10.47
VIP:192.168.10.60
Realserver1: 192.168.10.40
Realserver2: 192.168.10.401

系统采用CENTOS6.8 最小安装,并需要安装下列包
yum install kernel kernel-devel openssl openssl-devel gcc

1  安装keepalived
    #  wget
    #  tar zxvf keepalived-1.2.19.tar.gz
    #  cd keepalived-1.2.19
    #  ./configure --prefix=/usr sysconfdir=/etc --with-kernel-dir=/usr/src/kernels/2.6.32-573.12.1.el6.x86_64/  // --prefix=/usr执行安装路径 sysconfdir=/etc 指定配置文件路径    --with-kernel-dir 制定内核源码的头文件，配合LVS使用. 编译过程中越少啥包就装啥包
    #  make
    #  make install 

2 配置Mater
#   vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived


global_defs {
   notification_email {
     acassen
   }
   notification_email_from [e-mail]
   smtp_server smtp.qq.com
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}


vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.10.60/24 dev eth0 label eth0:1
    }


virtual_server 192.168.10.60 80 {
    delay_loop 6
    lb_algo rr
    lb_kind NAT
    persistence_timeout 50
    protocol TCP
				
					
				
   real_server 192.168.10.40 80 {
        weight 1
        HTTP_GET {
            url {
              path /index.html
              digest 7e90e3bf411e23327000c1e3528fff5f
          }
            connect_port    80
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }


    real_server 192.168.10.41 80 {
        weight 1
        HTTP_GET {
            url {
              path /index.html
              digest 5d05aaac53885c5325530d0c969f3b24
            }
            connect_port    80
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}

    2.2  生成网页digest的方法， 
        # [root@localhost keepalived]# genhash -s 192.168.10.40 -p 80 -u /index.html 
            MD5SUM = 0a5cb9603c17518a90cfbf3faadf77ca
      PS: 这个digest一定要添加，之前我将这行去掉，测试过程中，可以正常在队列中剔除down的realserver,但恢复后始终无法自动添加到队列中


3  配置backup机器

#   vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {
   notification_email {
     acassen
   }
   notification_email_from [e-mail]
   smtp_server smtp.qq.com
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}

vrrp_instance VI_1 {
    state BACKUP
    interface eth0
    virtual_router_id 51
    priority 80
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.10.60/24 dev eth0 label eth0:1
    }
virtual_server 192.168.10.60 80 {
    delay_loop 6
    lb_algo rr
    lb_kind DR
    persistence_timeout 50
    protocol TCP

    real_server 192.168.10.40 80 {
        weight 1
        HTTP_GET {
            url {
              path /index.html
              digest 7e90e3bf411e23327000c1e3528fff5f
          }
            connect_port    80
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }

    real_server 192.168.10.41 80 {
        weight 1
        HTTP_GET {
            url {
              path /index.html
              digest 5d05aaac53885c5325530d0c969f3b24
            }
            connect_port    80
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}

4  配置realserver机器

在/etc/init.d/中新增一个文件lvsrs,并执行 lvsrs start

#!/bin/sh
#
# Startup script for the Keepalived ReadServer
#
# processname: lvsrs
# description: Start and stop Real Server
VIP=192.168.10.60
# Source function library
. /etc/rc.d/init.d/functions

case "$1" in
  start)
        echo " Start LVS of Real Server"
        /sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up
        echo "1" > /proc/sys/net/ipv4/conf/lo/arp_ignore
        echo "2" > /proc/sys/net/ipv4/conf/lo/arp_announce
        echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore
        echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce
        ;;
  stop)
        /sbin/ifconfig lo:0 down
        echo " Stop LVS of Real Server"
        echo "0" > /proc/sys/net/ipv4/conf/lo/arp_ignore
        echo "0" > /proc/sys/net/ipv4/conf/lo/arp_announce
        echo "0" > /proc/sys/net/ipv4/conf/all/arp_ignore
        echo "0" > /proc/sys/net/ipv4/conf/all/arp_announce
        ;;
        *)
echo "Usage: $0 {start|stop}"
exit 1
esac

5 测试