Keepalived 简单搭建高可用
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环境：
node1:192.168.11.26
node2:192.168.11.28
VIP：192.168.11.99
Centos版本6.5 Keepalived Centos6.4+就收入base仓库，可直接Yum安装，本次采用Yum安装
一、node1配置
[[email protected] keepalived]# yum isntall -y keepalived #安装keepallived [[email protected] keepalived]# cd /etc/keepalived/ #进入/etc/keepalived [[email protected] keepalived]# cp keepalived.conf{,.bak} #备份 [[email protected] keepalived]# vim keepalived.conf #配置Keepalived简单实现VIP漂移 ! Configuration File for keepalived global_defs { notification_email { [email protected] } notification_email_from [email protected] smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 6Nb6zjWB } virtual_ipaddress { 192.168.11.99 } } #后面的删除，本次仅简单配置VIP漂移功能
二、node2配置
[[email protected]_master keepalived]# yum isntall -y keepalived #安装keepallived [[email protected]_master keepalived]# cd /etc/keepalived/ #进入/etc/keepalived [[email protected]_master keepalived]# cp keepalived.conf{,.bak} #备份 [[email protected]_master keepalived]# vim keepalived.conf #配置Keepalived简单实现VIP漂移 ! Configuration File for keepalived global_defs { notification_email { [email protected] } notification_email_from [email protected] smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_instance VI_1 { state BACKUP #修改为BACKUP interface eth0 virtual_router_id 51 priority 98 #修改优先级98 advert_int 1 authentication { auth_type PASS auth_pass 6Nb6zjWB } virtual_ipaddress { 192.168.11.99 } }
三、启动示例
[[email protected]_master keepalived]# service keepalived start #启动node2节点的keepalived Starting keepalived: [ OK ] [[email protected]_master keepalived]# ip add sh #查看配置成功：inet 192.168.11.99/32 scope global eth0 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:2d:ba:b0 brd ff:ff:ff:ff:ff:ff inet 192.168.11.28/24 brd 192.168.11.255 scope global eth0 inet 192.168.11.99/32 scope global eth0 inet6 fe80::20c:29ff:fe2d:bab0/64 scope link valid_lft forever preferred_lft forever [[email protected]_master ~]# tail -f /var/log/messages #查看日志：Netlink reflector reports IP 192.168.11.99 added，不关闭继续监视，去启动MASTER Oct 20 22:25:33 redis_master Keepalived[24842]: Starting Keepalived v1.2.13 (03/19,2015) Oct 20 22:25:33 redis_master Keepalived[24843]: Starting Healthcheck child process, pid=24844 Oct 20 22:25:33 redis_master Keepalived[24843]: Starting VRRP child process, pid=24845 Oct 20 22:25:33 redis_master Keepalived_vrrp[24845]: Netlink reflector reports IP 192.168.11.28 added Oct 20 22:25:33 redis_master Keepalived_healthcheckers[24844]: Netlink reflector reports IP 192.168.11.28 added Oct 20 22:25:33 redis_master Keepalived_vrrp[24845]: Netlink reflector reports IP fe80::20c:29ff:fe2d:bab0 added Oct 20 22:25:33 redis_master Keepalived_vrrp[24845]: Registering Kernel netlink reflector Oct 20 22:25:33 redis_master Keepalived_vrrp[24845]: Registering Kernel netlink command channel Oct 20 22:25:33 redis_master Keepalived_healthcheckers[24844]: Netlink reflector reports IP fe80::20c:29ff:fe2d:bab0 added Oct 20 22:25:33 redis_master Keepalived_vrrp[24845]: Registering gratuitous ARP shared channel Oct 20 22:25:33 redis_master Keepalived_healthcheckers[24844]: Registering Kernel netlink reflector Oct 20 22:25:33 redis_master Keepalived_healthcheckers[24844]: Registering Kernel netlink command channel Oct 20 22:25:34 redis_master Keepalived_healthcheckers[24844]: Opening file ‘/etc/keepalived/keepalived.conf‘. Oct 20 22:25:34 redis_master Keepalived_vrrp[24845]: Opening file ‘/etc/keepalived/keepalived.conf‘. Oct 20 22:25:34 redis_master Keepalived_vrrp[24845]: Configuration is using : 62847 Bytes Oct 20 22:25:34 redis_master Keepalived_healthcheckers[24844]: Configuration is using : 7390 Bytes Oct 20 22:25:34 redis_master Keepalived_vrrp[24845]: Using LinkWatch kernel netlink reflector... Oct 20 22:25:34 redis_master Keepalived_healthcheckers[24844]: Using LinkWatch kernel netlink reflector... Oct 20 22:25:34 redis_master Keepalived_vrrp[24845]: VRRP_Instance(VI_1) Entering BACKUP STATE Oct 20 22:25:34 redis_master Keepalived_vrrp[24845]: VRRP sockpool: [ifindex(2), proto(112), unicast(0), fd(10,11)] Oct 20 22:25:38 redis_master Keepalived_vrrp[24845]: VRRP_Instance(VI_1) Transition to MASTER STATE Oct 20 22:25:39 redis_master Keepalived_vrrp[24845]: VRRP_Instance(VI_1) Entering MASTER STATE Oct 20 22:25:39 redis_master Keepalived_vrrp[24845]: VRRP_Instance(VI_1) setting protocol VIPs. Oct 20 22:25:39 redis_master Keepalived_healthcheckers[24844]: Netlink reflector reports IP 192.168.11.99 added Oct 20 22:25:39 redis_master Keepalived_vrrp[24845]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.11.99 Oct 20 22:25:44 redis_master Keepalived_vrrp[24845]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.11.99 Oct 20 22:29:03 redis_master Keepalived_vrrp[24845]: VRRP_Instance(VI_1) Received higher prio advert #提示发现更高的优先级 Oct 20 22:29:03 redis_master Keepalived_vrrp[24845]: VRRP_Instance(VI_1) Entering BACKUP STATE #进入BACKUP状态 Oct 20 22:29:03 redis_master Keepalived_vrrp[24845]: VRRP_Instance(VI_1) removing protocol VIPs. #删除VIPs协议 Oct 20 22:29:03 redis_master Keepalived_healthcheckers[24844]: Netlink reflector reports IP 192.168.11.99 removed #删除VIP地址并通告
四、node1启动keepalived
[[email protected] keepalived]# service keepalived start #启动keepalived 正在启动 keepalived： [确定] [[email protected] keepalived]# ip add sh #查看配置成功：inet 192.168.11.99/32 scope global eth0 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:ad:98:5c brd ff:ff:ff:ff:ff:ff inet 192.168.11.26/24 brd 192.168.11.255 scope global eth0 inet 192.168.11.17/32 brd 192.168.11.17 scope global eth0:0 inet 192.168.11.99/32 scope global eth0 inet6 fe80::20c:29ff:fead:985c/64 scope link [[email protected] ~]# tail -f /var/log/messages #查看日志：Netlink reflector reports IP 192.168.11.99 added Jun 23 06:19:35 web2 Keepalived[9882]: Starting Keepalived v1.2.13 (03/19,2015) Jun 23 06:19:35 web2 Keepalived[9883]: Starting Healthcheck child process, pid=9885 Jun 23 06:19:35 web2 Keepalived[9883]: Starting VRRP child process, pid=9886 Jun 23 06:19:35 web2 Keepalived_vrrp[9886]: Netlink reflector reports IP 192.168.11.26 added Jun 23 06:19:35 web2 Keepalived_vrrp[9886]: Netlink reflector reports IP 192.168.11.17 added Jun 23 06:19:35 web2 Keepalived_vrrp[9886]: Netlink reflector reports IP 20.1.1.254 added Jun 23 06:19:35 web2 Keepalived_vrrp[9886]: Netlink reflector reports IP fe80::20c:29ff:fead:985c added Jun 23 06:19:35 web2 Keepalived_vrrp[9886]: Netlink reflector reports IP fe80::20c:29ff:fead:9866 added Jun 23 06:19:35 web2 Keepalived_vrrp[9886]: Registering Kernel netlink reflector Jun 23 06:19:35 web2 Keepalived_vrrp[9886]: Registering Kernel netlink command channel Jun 23 06:19:35 web2 Keepalived_vrrp[9886]: Registering gratuitous ARP shared channel Jun 23 06:19:35 web2 Keepalived_healthcheckers[9885]: Netlink reflector reports IP 192.168.11.26 added Jun 23 06:19:35 web2 Keepalived_healthcheckers[9885]: Netlink reflector reports IP 192.168.11.17 added Jun 23 06:19:35 web2 Keepalived_healthcheckers[9885]: Netlink reflector reports IP 20.1.1.254 added Jun 23 06:19:35 web2 Keepalived_healthcheckers[9885]: Netlink reflector reports IP fe80::20c:29ff:fead:985c added Jun 23 06:19:35 web2 Keepalived_healthcheckers[9885]: Netlink reflector reports IP fe80::20c:29ff:fead:9866 added Jun 23 06:19:35 web2 Keepalived_healthcheckers[9885]: Registering Kernel netlink reflector Jun 23 06:19:35 web2 Keepalived_healthcheckers[9885]: Registering Kernel netlink command channel Jun 23 06:19:37 web2 Keepalived_healthcheckers[9885]: Opening file ‘/etc/keepalived/keepalived.conf‘. Jun 23 06:19:37 web2 Keepalived_healthcheckers[9885]: Configuration is using : 7520 Bytes Jun 23 06:19:37 web2 Keepalived_healthcheckers[9885]: Using LinkWatch kernel netlink reflector... Jun 23 06:19:45 web2 Keepalived_vrrp[9886]: Opening file ‘/etc/keepalived/keepalived.conf‘. Jun 23 06:19:45 web2 Keepalived_vrrp[9886]: Configuration is using : 62977 Bytes Jun 23 06:19:45 web2 Keepalived_vrrp[9886]: Using LinkWatch kernel netlink reflector... Jun 23 06:19:45 web2 Keepalived_vrrp[9886]: VRRP sockpool: [ifindex(2), proto(112), unicast(0), fd(10,11)] Jun 23 06:19:46 web2 Keepalived_vrrp[9886]: VRRP_Instance(VI_1) Transition to MASTER STATE Jun 23 06:19:46 web2 Keepalived_vrrp[9886]: VRRP_Instance(VI_1) Received lower prio advert, forcing new election Jun 23 06:19:47 web2 Keepalived_vrrp[9886]: VRRP_Instance(VI_1) Entering MASTER STATE Jun 23 06:19:47 web2 Keepalived_vrrp[9886]: VRRP_Instance(VI_1) setting protocol VIPs. Jun 23 06:19:47 web2 Keepalived_vrrp[9886]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.11.99 Jun 23 06:19:47 web2 Keepalived_healthcheckers[9885]: Netlink reflector reports IP 192.168.11.99 added Jun 23 06:19:52 web2 Keepalived_vrrp[9886]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.11.99
本文出自 “SunshineBoySZF” 博客，请务必保留此出处http://sunshineboyszf.blog.51cto.com/12087328/1864063
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