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一、簡介

VS/NAT道理圖：

CentOS 6.5系統設置LVS(NAT)+keepalived高可用負載平衡系統

二、系統情況

嘗試拓撲：

CentOS 6.5系統設置LVS(NAT)+keepalived高可用負載平衡系統

系統平臺：CentOS 6.3

Kernel：2.6.32-279.el6.i686

LVS版本：ipvsadm-1.26

keepalived版本：keepalived-1.2.4

三、安裝

0、安裝LVS前系統需要安裝popt-static，kernel-devel，make，gcc，openssl-devel，lftp，libnl*，popt*

1、在兩臺Director Server上別離設置LVS+Keepalived

LVS install -------------

[[email protected]_MASTER ~]# wget http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.26.tar.gz

[[email protected]_MASTER ~]# ln -s /usr/src/kernels/2.6.32-279.el6.i686//usr/src/linux/

[[email protected]_MASTER ~]# tar zxvf ipvsadm-1.26.tar.gz

[[email protected]_MASTER ~]# cd ipvsadm-1.26

[[email protected]_MASTER ipvsadm-1.26]# make && make install

Keepalived install -------------

[[email protected]_MASTER ~]# wget http://www.keepalived.org/software/keepalived-1.2.4.tar.gz

[[email protected]_MASTER ~]# tar zxvf keepalived-1.2.4.tar.gz

[[email protected]_MASTER ~]# cd keepalived-1.2.4

[[email protected]_MASTER keepalived-1.2.4]# ./configure && make && make install

######### 將keepalived做成啟動處事，利便打點##########

[[email protected]_MASTER ~]# cp /usr/local/etc/rc.d/init.d/keepalived /etc/init.d/

[[email protected]_MASTER ~]# cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/

[[email protected]_MASTER ~]# mkdir /etc/keepalived/

[[email protected]_MASTER ~]# cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/

[[email protected]_MASTER ~]# cp /usr/local/sbin/keepalived /usr/sbin/

[[email protected]_MASTER ~]# service keepalived start | stop

2、開啟路由轉發

[[email protected]_MASTER ~]# vim /etc/sysctl.conf
net.ipv4.ip_forward = 1
[[email protected]_MASTER ~]# sysctl -p

3、設置Keepalived

[[email protected]_MASTER ~]# less /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {
   router_id LVS_MASTER
}

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 {
        10.0.0.227
    }
}

vrrp_instance LAN_GATEWAY {
    state MASTER
    interface eth1
    virtual_router_id 52
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.10.10
    }
}

virtual_server 10.0.0.227 80 {
    delay_loop 6
    lb_algo rr
    lb_kind NAT
#   persistence_timeout 5
    protocol TCP

    real_server 192.168.10.4 80 {
        weight 3
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
            connect_port 80
        }
    }

    real_server 192.168.10.5 80 {
        weight 3
        TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
            connect_port 80
        }
    }
}

BACKUP處事器同上設置，先安裝lvs再安裝keepalived，，然后設置/etc/keepalived/keepalived.conf，只需將講明部門改一下即可。

4、別離在2臺Real Server上面配置網關

把網關都配置成：192.168.10.10

5、在2臺RealServer中別離設置HTTP