三主机配置 keepalived VIP高可用

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