alived.conf
! Configuration File for keepalived
global_defs {
router_id lb02
}
vrrp_script nginx_check { #增加这一块
script "/scripts/check_nginx.sh"
interval 1
weight -20
}
vrrp_instance VI_1 {
state 130
interface ens33
virtual_router_id 51
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass 123456
}
virtual_ipaddress {
192.168.118.250
}
track_script { #还有这一部分
nginx_check
}
notify_129 "/scripts/notify.sh 129 192.168.118.250"
}
virtual_server 192.168.118.250 80 {
delay_loop 6
lb_algo rr
lb_kind DR
persistence_timeout 50
protocol TCP
real_server 192.168.118.129 80 {
weight 1
TCP_CHECK {
connect_port 80
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.118.130 80 {
weight 1
TCP_CHECK {
connect_port 80
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
[root@backup ~]# systemctl restart keepalived.service
测试
#129端，nginx服务出现异常
[root@129 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:b5:9a:13 brd ff:ff:ff:ff:ff:ff
inet 192.168.118.129/24 brd 192.168.118.255 scope global dynamic noprefixroute ens33
valid_lft 1539sec preferred_lft 1539sec
inet 192.168.118.250/32 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:feb5:9a13/64 scope link noprefixroute
valid_lft forever preferred_lft forever
[root@129 ~]# curl 192.168.118.250
web111
[root@129 ~]# curl 192.168.118.250
web222
[root@129 ~]# systemctl stop nginx.service
#130端
[root@130 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:b5:9a:13 brd ff:ff:ff:ff:ff:ff
inet 192.168.118.130/24 brd 192.168.118.255 scope global dynamic noprefixroute ens33
valid_lft 1539sec preferred_lft 1539sec
inet 192.168.118.250/32 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:feb5:9a13/64 scope link noprefixroute
valid_lft forever preferred_lft forever
[root@130 ~]# curl 192.168.202.160
web111
[root@130 ~]# curl 192.168.202.160
web222