目的： 进一步提高keepalived 可用性
设计：有3台keepalived 服务器 192.168.1.106 192.168.1.107 192.168.1.108。vip 是192.168.1.249
效果：只要有一台keepalive 运行正常。vip 就可以访问
z6：
vrrp_instance VI_1 { state BACKUP interface eth0 virtual_router_id 50 nopreempt priority 60 advert_int 1 unicast_src_ip 192.168.1.106 unicast_peer { 192.168.1.107 192.168.1.108 } authentication { auth_type PASS auth_pass 1111qwer } virtual_ipaddress { 192.168.7.249/24 dev eth0 label eth0:1 } } z7:
vrrp_instance VI_1 { state BACKUP interface eth0 virtual_router_id 50 priority 70 advert_int 1 nopreempt unicast_src_ip 192.168.1.107 unicast_peer { 192.168.1.106 192.168.1.108 } authentication { auth_type PASS auth_pass 1111qwer } virtual_ipaddress { 192.168.7.249/24 dev eth0 label eth0:1 } } z8:
vrrp_instance VI_1 { state BACKUP interface eth0 virtual_router_id 50 priority 80 advert_int 1 nopreempt unicast_src_ip 192.168.1.108 unicast_peer { 192.168.1.106 192.168.1.107 } authentication { auth_type PASS auth_pass 1111qwer } virtual_ipaddress { 192.168.7.249/24 dev eth0 label eth0:1 } } 非抢占模式 默认 是谁先开启vip 运行在哪台机器上的。如果发生故障转移，再比较priority
我这里先开启的先开启是z8
验证：
当停止z8 时 vip 会跑在z7 上
Mar 24 16:52:48 z7 Keepalived_vrrp[1200]: VRRP_Instance(VI_1) Entering BACKUP STATE Mar 24 16:56:02 z7 Keepalived_vrrp[1200]: VRRP_Instance(VI_1) Transition to MASTER STATE Mar 24 16:56:03 z7 Keepalived_vrrp[1200]: VRRP_Instance(VI_1) Entering MASTER STATE 当停止z7 上 vip 会运行在 z6 上
Mar 24 16:55:44 z6 systemd[1]: Started Keepalive Daemon (LVS and VRRP). Mar 24 16:55:44 z6 Keepalived_healthcheckers[1138]: Opening file '/etc/keepalived/keepalived.conf'. Mar 24 16:55:44 z6 Keepalived_vrrp[1139]: Registering Kernel netlink reflector Mar 24 16:55:44 z6 Keepalived_vrrp[1139]: Registering Kernel netlink command channel Mar 24 16:55:44 z6 Keepalived_vrrp[1139]: Registering gratuitous ARP shared channel Mar 24 16:55:44 z6 Keepalived_vrrp[1139]: Opening file '/etc/keepalived/keepalived.conf'. Mar 24 16:55:44 z6 Keepalived_vrrp[1139]: Using LinkWatch kernel netlink reflector... Mar 24 16:55:44 z6 Keepalived_vrrp[1139]: VRRP_Instance(VI_1) Entering BACKUP STATE Mar 24 16:56:43 z6 Keepalived_vrrp[1139]: VRRP_Instance(VI_1) Transition to MASTER STATE Mar 24 16:56:44 z6 Keepalived_vrrp[1139]: VRRP_Instance(VI_1) Entering MASTER STATE 然后把z7、z8重启 ，当停止z6 ，vip 会运行在z8 上
Mar 24 17:10:09 z8 systemd[1]: Started Keepalive Daemon (LVS and VRRP). Mar 24 17:10:09 z8 Keepalived[1736]: Starting VRRP child process, pid=1738 Mar 24 17:10:09 z8 Keepalived_healthcheckers[1737]: Opening file '/etc/keepalived/keepalived.conf'. Mar 24 17:10:09 z8 Keepalived_vrrp[1738]: Registering Kernel netlink reflector Mar 24 17:10:09 z8 Keepalived_vrrp[1738]: Registering Kernel netlink command channel Mar 24 17:10:09 z8 Keepalived_vrrp[1738]: Registering gratuitous ARP shared channel Mar 24 17:10:09 z8 Keepalived_vrrp[1738]: Opening file '/etc/keepalived/keepalived.conf'. Mar 24 17:10:09 z8 Keepalived_vrrp[1738]: Using LinkWatch kernel netlink reflector... Mar 24 17:10:09 z8 Keepalived_vrrp[1738]: VRRP_Instance(VI_1) Entering BACKUP STATE Mar 24 17:11:08 z8 Keepalived_vrrp[1738]: VRRP_Instance(VI_1) Transition to MASTER STATE Mar 24 17:11:09 z8 Keepalived_vrrp[1738]: VRRP_Instance(VI_1) Entering MASTER STATE 原文链接：https://blog.csdn.net/qq_36801585/article/details/105083943
原创文章，作者：优速盾-小U，如若转载，请注明出处：https://www.cdnb.net/bbs/archives/7609
