直上干活
dr1上keepalived的配置:
/etc/keepalived/keepalived.conf
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global_defs { router_id LVS1 # 设置lvs的id,在一个网络内应该是唯一的
} vrrp_sync_group test { #设置vrrp组
group {
loadbalance
}
} vrrp_instance loadbalance { state MASTER #设置lvs的状态,报错MASTER和BACKUP两种,必须大写
interface eth0 #设置对外服务的接口
lvs_sync_daemon_inteface eth0 #设置lvs监听的接口
virtual_router_id 51 #设置虚拟路由表示
priority 180 #设置优先级,数值越大,优先级越高
advert_int 1 #设置同步时间间隔
authentication { #设置验证类型和密码
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.56.200
}
} virtual_server 192.168.56.200 80 { delay_loop 6 #健康检查时间间隔
lb_algo rr #负载均衡调度算法
lb_kind DR #负载均衡转发规则
#persistence_timeout 20 #设置会话保持时间,对bbs等很有用
protocol TCP #协议
real_server 192.168.56.105 80 {
weight 3 #设置权重
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.56.106 80 {
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
} |
dr2上keepalived的配置
/etc/keepalived/keepalived.conf
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global_defs { router_id LVS2
} vrrp_sync_group test {
group {
loadbalance
}
} vrrp_instance loadbalance { state BACKUP
interface eth0
lvs_sync_daemon_inteface eth0
virtual_router_id 51
priority 150
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.56.200
}
} virtual_server 192.168.56.200 80 { delay_loop 6
lb_algo rr
lb_kind DR
#persistence_timeout 20
protocol TCP
real_server 192.168.56.105 80 {
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.56.106 80 {
weight 3
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}} |
启动dr1上的keepalived
keepalived -f /etc/keepalived/keepalived.conf
查看信息
然后启动dr2上keepalived
keepalived -f /etc/keepalived/keepalived.conf
查看信息
在realserver1与realserver2上分别执行下面的脚本
/home/lhb/sh/rs.sh
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#!/bin/bash vip=192.168.56.200 ifconfig lo:0 $vip netmask 255.255.255.255
route add -host $vip dev lo:0 route -n 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
#sysctl -p #查看sysctl的配置变化,可不执行 |
然后我们开一个客户端方位vip:
在dr1上执行ipvsadm -ln
然后我们在dr1上关闭keepalived
这是我们继续访问vip,访问正常如图所示:
访问正常,说明web业务没有停止:
由此推断我们的dr2已经开始接管业务了.然后到dr2上看一下信息:
说明故障发生时,业务服务已经自动从dr1转移到dr2上了。
然后当我们的dr1修复好后,我们执行keepalived -f /etc/keepalived/keepalived.conf
此时访问vip,业务仍然正常访问.
回到dr2上看信息
到此为止,keepalived实现lvs的故障在主备机自动切换已经展示完毕。
本文转自birdinroom 51CTO博客,原文链接:http://blog.51cto.com/birdinroom/1402004,如需转载请自行联系原作者