lvs LVS Keepalived雙主配置

一般場景中實現lvs高可用及後端的lb，同時只有一台lvs提供服務，另一台作為backup，顯然沒有做到最大利用。我們可以讓兩台lvs都作為master，並又互為backup，與master-backup架構相比，master-master架構需要多加乙個vip。

lvs1+keepalived：192.168.1.2 lvs2+keepalived：192.168.1.3 web1：192.168.1.4 web2：192.168.1.5

vip：192.168.1.6，192.168.1.7

master host1 配置

[root@localhost ~]
# cat /etc/keepalived/keepalived.conf
vrrp_instance bl_one 
virtual_ipaddress 
}vrrp_instance bl_two 
virtual_ipaddress 
}virtual_server 192.168.1.6 80 
} real_server 192.168.1.5 80 }}
virtual_server 192.168.1.7 80 
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}} real_server 192.168.1.5 80 
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}}}

master host2 配置

[root@localhost ~]
# cat /etc/keepalived/keepalived.conf
vrrp_instance bl_one 
virtual_ipaddress 
}vrrp_instance bl_two 
virtual_ipaddress 
}virtual_server 192.168.1.6 80 
} real_server 192.168.1.5 80 }}
virtual_server 192.168.1.7 80 
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}} real_server 192.168.1.5 80 
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}}}

以上建立了兩個例項lb_one、lb_two ，其中a主機做為vip1位址的master，b主機做為vip2位址的master，a、b主機互為backup 。另外還有乙個技巧點，在master-backup架構中也可以配置多個vip位址，只需要在例項的vip配置中增加位址、並在後面指定對應的虛位址後面的realserver即可。在主備腳架中配置多個vip的方法如下：

virtual_ipaddress

[root@localhost # cat dr_client.sh #!/bin/bash vip1=192.168.1.6 vip2=192.168.1.7 # vip's broadcast broadcast=192.168.1.255 . /etc/rc.d/init.d/functions case "$1" instart) echo "reparing for real server" 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 ifconfig lo:0 $vip1 netmask 255.255.255.255 broadcast $broadcast up ifconfig lo:1 $vip2 netmask 255.255.255.255 broadcast $broadcast up /sbin/route add -host $vip1 dev lo:0 /sbin/route add -host $vip2 dev lo:1 ;;stop) ifconfig lo:0 down ifconfig lo:1 down 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: lvs " exit 1

esac

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