keepalived 双网卡服务器双机热备
环境准备test1
eth0：18.1.30.58eth1：192.168.87.200
test2
eth0：18.1.30.59eth1：192.168.87.180
VIP
18.1.30.30 192.168.87.87
test1keepalived的配置
vrrp_sync_group VGM {
group {
VI_HA
}
}
vrrp_instance VI_HA {
state MASTER
interface eth0
virtual_router_id 51
priority100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_interface {
eth0
eth1
}
virtual_ipaddress {
18.1.30.30/24 dev eth0
192.168.87.87/24 dev eth1
}
}
test2keepalived的配置
vrrp_sync_group VGM {
group {
VI_HA
}
}
vrrp_instance VI_HA {
state BACKUP
interface eth0
virtual_router_id 51
priority99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_interface {
eth0
eth1
}
virtual_ipaddress {
18.1.30.30/24 dev eth0
192.168.87.87/24 dev eth1
}
}
测试
http://blog.运维网.com/attachment/201306/155750343.jpg
# ifdown eth0
http://blog.运维网.com/attachment/201306/155901547.jpg
双网卡双vrrp实例
如果keepalived有两个网段，每个网段开启一个vrrp实例，当外网出现故障的话，keepalived任然认为自己很健康，所以就进行master和backup的切换，这样会导致外网不可用
解决方法是把两个实例放进一个sync group中
test2keepalived的配置
global_defs {
router_idHAWEB
}
vrrp_sync_group VGM {
group {
VI_HA_1
VI_HA_1
}
}
vrrp_instance VI_HA_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_interface {
eth0
eth1
}
virtual_ipaddress {
18.1.30.30/24 dev eth0
}
}
vrrp_instance VI_HA_2 {
state BACKUP
interface eth1
virtual_router_id 51
priority99
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_interface {
eth0
eth1
}
virtual_ipaddress {
192.168.87.87/24 dev eth1
}
}
test1keepalived的配置
global_defs {
router_idHAWEB
}
vrrp_sync_group VGM {
group {
VI_HA_1
VI_HA_1
}
}
vrrp_instance VI_HA_1 {
state MASTER
interface eth0
virtual_router_id 51
priority100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_interface {
eth0
eth1
}
virtual_ipaddress {
18.1.30.30/24 dev eth0
}
}
vrrp_instance VI_HA_2 {
state BACKUP
interface eth1
virtual_router_id 51
priority100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_interface {
eth0
eth1
}
virtual_ipaddress {
192.168.87.87/24 dev eth1
}
}
测试
http://blog.运维网.com/attachment/201306/155750343.jpg
# ifdown eth0
http://blog.运维网.com/attachment/201306/155901547.jpg
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