三台主机:
192.168.33.134
192.168.33.136
192.168.33.137
实验前：
关闭selinux 和iptables
1）. 192.168.33.134 配置
#yum install keepalived
#systemctl start keepalived
#systemctl enable keepalived
#cp vim /etc/keepalived/keepalived.conf{,.bak}
#vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@centos7.magedu.com
}
notification_email_from root@centos7.magedu.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id centos7.magedu.com
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
vrrp_iptables
}
vrrp_instance VIP_1 {
state MASTER
interface ens33
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.33.200 dev ens33 label ens33:0
}
2）. 192.168.33.136 配置
#yum install keepalived
#systemctl start keepalived
#systemctl enable keepalived
#cp vim /etc/keepalived/keepalived.conf{,.bak}
#vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@centos7.magedu.com
}
notification_email_from root@centos7.magedu.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id centos7.magedu.com
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
vrrp_iptables
}
vrrp_instance VIP_1 {
state BACKUP
interface ens33
virtual_router_id 51
priority 50
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.33.200 dev ens33 label ens33:0
}
3）. 192.168.33.137配置
#yum install keepalived
#systemctl start keepalived
#systemctl enable keepalived
#cp vim /etc/keepalived/keepalived.conf{,.bak}
#vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
root@centos7.magedu.com
}
notification_email_from root@centos7.magedu.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id centos7.magedu.com
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
vrrp_iptables
}
vrrp_instance VIP_1 {
state BACKUP
interface ens33
virtual_router_id 51
priority 10
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.33.200 dev ens33 label ens33:0
}
默认组播：抓包，看到流量是发往组播
[root@centos7 ~]#tcpdump -i ens33 -nn host 224.0.0.18
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on ens33, link-type EN10MB (Ethernet), capture size 262144 bytes
10:35:43.325499 IP 192.168.33.134 > 224.0.0.18: VRRPv2, Advertisement, vrid 51, prio 100, authtype simple, intvl 1s, length 20
10:35:44.327673 IP 192.168.33.134 > 224.0.0.18: VRRPv2, Advertisement, vrid 51, prio 100, authtype simple, intvl 1s, length 20
10:35:45.329368 IP 192.168.33.134 > 224.0.0.18: VRRPv2, Advertisement, vrid 51, prio 100, authtype simple, intvl 1s, length 20
10:35:46.331697 IP 192.168.33.134 > 224.0.0.18: VRRPv2, Advertisement, vrid 51, prio 100, authtype simple, intvl 1s, leng