Keepalived 简单搭建高可用
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
# yum isntall -y keepalived #安装keepallived
# cd /etc/keepalived/ #进入/etc/keepalived
# cp keepalived.conf{,.bak} #备份
# vim keepalived.conf #配置Keepalived简单实现VIP漂移
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from 855@usfund.com.cn
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
# yum isntall -y keepalived #安装keepallived
# cd /etc/keepalived/ #进入/etc/keepalived
# cp keepalived.conf{,.bak} #备份
# vim keepalived.conf #配置Keepalived简单实现VIP漂移
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from 855@usfund.com.cn
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
# service keepalived start #启动node2节点的keepalived
Starting keepalived:
# ip add sh #查看配置成功：inet 192.168.11.99/32 scope global eth0
1: lo: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: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
# 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: Starting Keepalived v1.2.13 (03/19,2015)
Oct 20 22:25:33 redis_master Keepalived: Starting Healthcheck child process, pid=24844
Oct 20 22:25:33 redis_master Keepalived: Starting VRRP child process, pid=24845
Oct 20 22:25:33 redis_master Keepalived_vrrp: Netlink reflector reports IP 192.168.11.28 added
Oct 20 22:25:33 redis_master Keepalived_healthcheckers: Netlink reflector reports IP 192.168.11.28 added
Oct 20 22:25:33 redis_master Keepalived_vrrp: Netlink reflector reports IP fe80::20c:29ff:fe2d:bab0 added
Oct 20 22:25:33 redis_master Keepalived_vrrp: Registering Kernel netlink reflector
Oct 20 22:25:33 redis_master Keepalived_vrrp: Registering Kernel netlink command channel
Oct 20 22:25:33 redis_master Keepalived_healthcheckers: Netlink reflector reports IP fe80::20c:29ff:fe2d:bab0 added
Oct 20 22:25:33 redis_master Keepalived_vrrp: Registering gratuitous ARP shared channel
Oct 20 22:25:33 redis_master Keepalived_healthcheckers: Registering Kernel netlink reflector
Oct 20 22:25:33 redis_master Keepalived_healthcheckers: Registering Kernel netlink command channel
Oct 20 22:25:34 redis_master Keepalived_healthcheckers: Opening file '/etc/keepalived/keepalived.conf'.
Oct 20 22:25:34 redis_master Keepalived_vrrp: Opening file '/etc/keepalived/keepalived.conf'.
Oct 20 22:25:34 redis_master Keepalived_vrrp: Configuration is using : 62847 Bytes
Oct 20 22:25:34 redis_master Keepalived_healthcheckers: Configuration is using : 7390 Bytes
Oct 20 22:25:34 redis_master Keepalived_vrrp: Using LinkWatch kernel netlink reflector...
Oct 20 22:25:34 redis_master Keepalived_healthcheckers: Using LinkWatch kernel netlink reflector...
Oct 20 22:25:34 redis_master Keepalived_vrrp: VRRP_Instance(VI_1) Entering BACKUP STATE
Oct 20 22:25:34 redis_master Keepalived_vrrp: VRRP sockpool:
Oct 20 22:25:38 redis_master Keepalived_vrrp: VRRP_Instance(VI_1) Transition to MASTER STATE
Oct 20 22:25:39 redis_master Keepalived_vrrp: VRRP_Instance(VI_1) Entering MASTER STATE
Oct 20 22:25:39 redis_master Keepalived_vrrp: VRRP_Instance(VI_1) setting protocol VIPs.
Oct 20 22:25:39 redis_master Keepalived_healthcheckers: Netlink reflector reports IP 192.168.11.99 added
Oct 20 22:25:39 redis_master Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.11.99
Oct 20 22:25:44 redis_master Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.11.99
Oct 20 22:29:03 redis_master Keepalived_vrrp: 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: VRRP_Instance(VI_1) Entering BACKUP STATE #进入BACKUP状态
Oct 20 22:29:03 redis_master Keepalived_vrrp: VRRP_Instance(VI_1) removing protocol VIPs. #删除VIPs协议
Oct 20 22:29:03 redis_master Keepalived_healthcheckers: Netlink reflector reports IP 192.168.11.99 removed #删除VIP地址并通告
四、node1启动keepalived
# service keepalived start #启动keepalived
正在启动 keepalived： [确定]
# ip add sh #查看配置成功：inet 192.168.11.99/32 scope global eth0
1: lo: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: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
# 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: Starting Keepalived v1.2.13 (03/19,2015)
Jun 23 06:19:35 web2 Keepalived: Starting Healthcheck child process, pid=9885
Jun 23 06:19:35 web2 Keepalived: Starting VRRP child process, pid=9886
Jun 23 06:19:35 web2 Keepalived_vrrp: Netlink reflector reports IP 192.168.11.26 added
Jun 23 06:19:35 web2 Keepalived_vrrp: Netlink reflector reports IP 192.168.11.17 added
Jun 23 06:19:35 web2 Keepalived_vrrp: Netlink reflector reports IP 20.1.1.254 added
Jun 23 06:19:35 web2 Keepalived_vrrp: Netlink reflector reports IP fe80::20c:29ff:fead:985c added
Jun 23 06:19:35 web2 Keepalived_vrrp: Netlink reflector reports IP fe80::20c:29ff:fead:9866 added
Jun 23 06:19:35 web2 Keepalived_vrrp: Registering Kernel netlink reflector
Jun 23 06:19:35 web2 Keepalived_vrrp: Registering Kernel netlink command channel
Jun 23 06:19:35 web2 Keepalived_vrrp: Registering gratuitous ARP shared channel
Jun 23 06:19:35 web2 Keepalived_healthcheckers: Netlink reflector reports IP 192.168.11.26 added
Jun 23 06:19:35 web2 Keepalived_healthcheckers: Netlink reflector reports IP 192.168.11.17 added
Jun 23 06:19:35 web2 Keepalived_healthcheckers: Netlink reflector reports IP 20.1.1.254 added
Jun 23 06:19:35 web2 Keepalived_healthcheckers: Netlink reflector reports IP fe80::20c:29ff:fead:985c added
Jun 23 06:19:35 web2 Keepalived_healthcheckers: Netlink reflector reports IP fe80::20c:29ff:fead:9866 added
Jun 23 06:19:35 web2 Keepalived_healthcheckers: Registering Kernel netlink reflector
Jun 23 06:19:35 web2 Keepalived_healthcheckers: Registering Kernel netlink command channel
Jun 23 06:19:37 web2 Keepalived_healthcheckers: Opening file '/etc/keepalived/keepalived.conf'.
Jun 23 06:19:37 web2 Keepalived_healthcheckers: Configuration is using : 7520 Bytes
Jun 23 06:19:37 web2 Keepalived_healthcheckers: Using LinkWatch kernel netlink reflector...
Jun 23 06:19:45 web2 Keepalived_vrrp: Opening file '/etc/keepalived/keepalived.conf'.
Jun 23 06:19:45 web2 Keepalived_vrrp: Configuration is using : 62977 Bytes
Jun 23 06:19:45 web2 Keepalived_vrrp: Using LinkWatch kernel netlink reflector...
Jun 23 06:19:45 web2 Keepalived_vrrp: VRRP sockpool:
Jun 23 06:19:46 web2 Keepalived_vrrp: VRRP_Instance(VI_1) Transition to MASTER STATE
Jun 23 06:19:46 web2 Keepalived_vrrp: VRRP_Instance(VI_1) Received lower prio advert, forcing new election
Jun 23 06:19:47 web2 Keepalived_vrrp: VRRP_Instance(VI_1) Entering MASTER STATE
Jun 23 06:19:47 web2 Keepalived_vrrp: VRRP_Instance(VI_1) setting protocol VIPs.
Jun 23 06:19:47 web2 Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.11.99
Jun 23 06:19:47 web2 Keepalived_healthcheckers: Netlink reflector reports IP 192.168.11.99 added
Jun 23 06:19:52 web2 Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.11.99
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