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#!/bin/bash
# BY kerryhu
# Please manual operation yum of before Operation.....
系統情況`：CentOS 5.5（定制安裝）
組件：
Base
Development Libraries
Development Tools
Editors
Text-based Internet

lvs-master：192.168.9.201
lvs-backup：192.168.9.202
vip：192.168.9.200
web1：192.168.9.203
web2：192.168.9.204
netmask：255.255.255.0
gateway：192.168.9.1

網絡拓撲：

CentOS系統下布署LVS+keepalived負載平衡高可用情況

echo "============================ 更新系統時間 ======================"
yum install -y ntp
ntpdate time.nist.gov
echo "00 01 * * * /usr/sbin/ntpdate time.nist.gov" /etc/crontab

echo “============================ 封鎖不消處事 =======================”
/root/del_servcie.sh # 附件中自界說劇本

echo “========================= 安裝ipvsadm、keepalived ==================”
[[email protected] ~]# cd /usr/local/src
[[email protected] ~]# wget http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar.gz
[[email protected] ~]# wget http://www.keepalived.org/software/keepalived-1.1.17.tar.gz
[[email protected] ~]# ln -sv /usr/src/kernels/2.6.18-194.el5-i686/ /usr/src/linux
[[email protected] ~]# tar -zxvf ipvsadm-1.24.tar.gz
[[email protected] ~]# cd ipvsadm-1.24
[[email protected] ~]# make;make install
[[email protected] ~]# cd ..
[[email protected] ~]# tar -zxvf keepalived-1.1.17.tar.gz
[[email protected] ~]# cd keepalived-1.1.17
[[email protected] ~]# ./configure
configure: error:
!!! OpenSSL is not properly installed on your system. !!!
!!! Can not include OpenSSL headers files.
辦理步伐：
[[email protected] ~]# yum -y install openssl-devel
[[email protected] ~]# ./configure
[[email protected] ~]# make;make install
編譯的時候呈現這個提示，說明keepalived和內核團結了，假如不是這樣的，需要加上這個參數./configure --with-kernel-

dir=/kernel/path
Keepalived configuration
------------------------
Keepalived version       : 1.1.17
Compiler                 : gcc
Compiler flags           : -g -O2
Extra Lib                : -lpopt -lssl -lcrypto
Use IPVS Framework       : Yes
IPVS sync daemon support : Yes
Use VRRP Framework       : Yes
Use LinkWatch            : No
Use Debug flags          : No

echo “======================= 設置keepalived ===========================”
[[email protected] ~]# cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
[[email protected] ~]# cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
[[email protected] ~]# mkdir /etc/keepalived
[[email protected] ~]# cp /usr/local/sbin/keepalived /usr/sbin/
[[email protected] ~]# vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
   notification_email {
      [email protected]
   }
   notification_email_from [email protected]
   smtp_server smtp.163.com
# smtp_connect_timeout 30
   router_id LVS_DEVEL
}
# VIP1
vrrp_instance VI_1 {
    state MASTER             #備份處事器大將MASTER改為BACKUP
    interface eth0
    lvs_sync_daemon_inteface eth0
    virtual_router_id 51
    priority 100    # 備份處事大將100改為90
    advert_int 5
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
192.168.9.200
        #(假如有多個VIP，繼承換行填寫.)
    }
}
virtual_server 192.168.9.200 80 {
    delay_loop 6                  #(每隔10秒查詢realserver狀態)
    lb_algo wlc                  #(lvs 算法)
    lb_kind DR                  #(Direct Route)
    persistence_timeout 60        #(同一IP的毗連60秒內被分派到同一臺realserver)
    protocol TCP                #(用TCP協議查抄realserver狀態)
    real_server 192.168.9.203 80 {
        weight 100               #(權重)
        TCP_CHECK {
        connect_timeout 10       #(10秒無響應超時)
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
    }
    real_server 192.168.9.204 80 {
        weight 100
        TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 80
        }
     }
}
[[email protected] ~]# service keepalived start|stop
[[email protected] ~]# chkconfig –level 2345 keepalived on