<服务>Keepalived服务
目录：
Keepalived
keepalive期初是专门为LVS设计的，专门用来监控LVS集群系统中各个服务节点的状态的，后来又加入了VRRP(虚拟路由器冗余协议)功能，因此除了配合LVS，也可以做Nginx，haproxy和MySQL等高可用性软件，只要是满足一个挂掉，另一个服务接管都可以用keepalived来进行实现高可用。所以keepalived的两大用途就是服务健康检查和失败接管。
Keepalived故障切换是通过VRRP协议来实现，主节点通过不断向备份节点广播心跳信息，用于告诉备节点正常使用，当主节点发生故障，备节点无法继续监测到主节点的心跳信息，进而自身接管程序，接管主节点IP资源以及服务，当主节点恢复服务，备节点会释放主节点故障时接管的IP资源及服务。
VRRP协议是为了解决静态路由的单点故障，VRRP是通过一种竞选协议机制来将路由任务交给某台VRRP路由器。
在一台VRRP虚拟路由中，有多台物理的VRRP路由器，但是这多台物理机器不能同时工作，而是由一台MASTER负责路由工作，而其他都是BACKUP，而MASTER并非一成不变，VRRP协议让每个VRRP路由参与竞选，最终获胜的就是MASTER，MASTER有一些特权，比如拥有虚拟路由器的IP地址，我们的主机就是用这个IP地址作为静态路由的，拥有特权的MASTER要负责转发发送给网关地址的包和响应ARP请求。
VRRP通过竞选协议来实现虚拟路由器的功能，所有的协议报文都是通过IP多播包形式发送的。虚拟路由由VRID和一组IP地址组成，对外表现为一个周知的MAC地址。所以在一个虚拟路由器中不管谁是MASTER，对外都是相同的MAC和IP(即VIP)，客户端也不需要因为MASTER的改变而修改自己的路由配置，对外部来说主从切换是透明的。
在一个虚拟路由器中，只有作为MASTER的VRRP路由器会一直发送VRRP广告包，BACKUP不会抢占MASTER，除非它的优先级更高，当MASTER不可用时(收不到广播包)，多台的BACKUP中优先级最高的这台会被抢占为MASTER，这种抢占是非常快速的，大概小于1s，以保证服务的连续性。
另外出于安全性，VRRP包使用了加密协议进行加密，不过官方说效果不好。
keepalived安装
[root@why-1 ~]# wget http://www.keepalived.org/software/keepalived-1.1.19.tar.gz
[root@why-1 ~]# tar xf keepalived-1.1.19.tar.gz
[root@why-1 ~]# cd keepalived-1.1.19
[root@why-1 keepalived-1.1.19]# ./configure
Keepalived configuration
------------------------
Keepalived version : 1.1.19
Compiler : gcc
Compiler flags : -g -O2
Extra Lib : -lpopt -lssl -lcrypto
Use IPVS Framework : Yes # 支持IPVS
IPVS sync daemon support : Yes # 支持IPVS同步
Use VRRP Framework : Yes # 支持VRRP
Use Debug flags : No
[root@why-1 keepalived-1.1.19]# make # 如果有openssl问题，yum install openssl*，如果有popt问题，yum install popt*
[root@why-1 keepalived-1.1.19]# make install
[root@why-1 keepalived]# cp /usr/local/etc/rc.d/init.d/keepalived /etc/init.d/
[root@why-1 keepalived]# cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
[root@why-1 keepalived]# mkdir -p /etc/keepalived
[root@why-1 keepalived]# cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
[root@why-1 keepalived]# cp /usr/local/sbin/keepalived /usr/sbin/
[root@why-1 keepalived]# /etc/init.d/keepalived start
正在启动 keepalived： [确定]
[root@why-1 keepalived]# ps -ef | grep keep
root 9405 1 0 19:30 ? 00:00:00 keepalived -D
root 9407 9405 2 19:30 ? 00:00:00 keepalived -D
root 9408 9405 6 19:30 ? 00:00:00 keepalived -D
root 9410 6624 0 19:30 pts/1 00:00:00 grep keep
[root@why-1 keepalived]# /etc/init.d/keepalived stop
停止 keepalived： [确定]
以上配置的过程都可以通过configure的时候加入--sysconf=/etc来解决
然后只需要
cp /usr/local/sbin/keepalived /usr/sbin/
keepalived配置文件(单实例)
#192.168.0.201配置
[root@why-1 keepalived]# cat keepalived.conf
! Configuration File for keepalived #注释
global_defs { #全局定义
notification_email { #监控报警邮箱
93216193@qq.com #邮箱一般不用配置，这些一般通过监控来实现
}
notification_email_from Alexandre.Cassen@firewall.loc #发件人
smtp_server 127.0.0.1 #发邮件的服务器
smtp_connect_timeout 30 #超时时间
router_id LVS_1 #keepalived id
}
vrrp_instance VI_1 { #一个实例，可以理解为虚拟路由器(VI_1为实例名)
state MASTER #标记状态
interface eth0 #提供服务的接口,即keepalived通过eth0网卡通信
virtual_router_id 55 #虚拟路由ID，在两个keepalived之间必须一致，在同一keepalived的中不能相同
priority 150 #优先级，在优先级和状态标记之间，以优先级为准
advert_int 1 #超时间隔，单位为s
authentication { #授权加密口令
auth_type PASS
auth_pass 1111
}
virtual_ipaddress { #vip地址
192.168.0.204/24
}
}
#192.168.0.130配置
[root@why keepalived]# cat keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
93216193@qq.com
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_2 #不同keepalived id
}
vrrp_instance VI_1 { #相同实例名
state BACKUP #标记状态
interface eth0
virtual_router_id 55 #相同虚拟路由id
priority 100 #官方建议，相差50
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress { #相同的VIP
192.168.0.204/24
}
}
更多的配置可以man keepalived.conf
keepalived单实例配置检验
我这边通过两台机器，IP分别为192.168.0.201和192.168.0.130且不做任何别名IP配置，VIP为192.168.0.204，配置文件如上所示
192.168.0.201主机
[root@why-1 keepalived]# /etc/init.d/keepalived start
正在启动 keepalived： [确定]
[root@why-1 keepalived]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:98:5B:B7
inet addr:192.168.0.201 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe98:5bb7/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:71629 errors:0 dropped:0 overruns:0 frame:0
TX packets:32927 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:80780577 (77.0 MiB) TX bytes:2605091 (2.4 MiB)
Interrupt:19 Base address:0x2000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:88 errors:0 dropped:0 overruns:0 frame:0
TX packets:88 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:7368 (7.1 KiB) TX bytes:7368 (7.1 KiB)
[root@why-1 keepalived]# ip add
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 UNKNOWN qlen 1000
link/ether 00:0c:29:98:5b:b7 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.201/24 brd 192.168.0.255 scope global eth0
inet 192.168.0.204/24 scope global secondary eth0
inet6 fe80::20c:29ff:fe98:5bb7/64 scope link
valid_lft forever preferred_lft forever
3: pan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN
link/ether 16:22:d2:06:6c:1a brd ff:ff:ff:ff:ff:ff
通过ip add我们可以看到虚拟的192.168.0.204/24的ip,但是在ifconfig中没有看到。不要在意那个pan0的网卡，那个是蓝牙网卡。
192.168.0.130主机
[root@why keepalived]# /etc/init.d/keepalived start
正在启动 keepalived： [确定]
[root@why keepalived]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:29:D1:C4:C3
inet addr:192.168.0.130 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fed1:c4c3/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:127803 errors:0 dropped:0 overruns:0 frame:0
TX packets:21491 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:38609705 (36.8 MiB) TX bytes:6321745 (6.0 MiB)
Interrupt:19 Base address:0x2000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:2195 errors:0 dropped:0 overruns:0 frame:0
TX packets:2195 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:173144 (169.0 KiB) TX bytes:173144 (169.0 KiB)
[root@why keepalived]# ip add
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 UNKNOWN qlen 1000
link/ether 00:0c:29:d1:c4:c3 brd ff:ff:ff:ff:ff:ff
inet 192.168.0.130/24 brd 192.168.0.255 scope global eth0
inet6 fe80::20c:29ff:fed1:c4c3/64 scope link
valid_lft forever preferred_lft forever
4: pan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN
link/ether 22:49:69:a7:47:45 brd ff:ff:ff:ff:ff:ff
通过第三方机器进行ping再次同时关闭201主机的keepalived
[root@why-3 conf]# ping 192.168.0.204
PING 192.168.0.204 (192.168.0.204) 56(84) bytes of data.
64 bytes from 192.168.0.204: icmp_seq=1 ttl=64 time=18.1 ms
64 bytes from 192.168.0.204: icmp_seq=2 ttl=64 time=2.20 ms
64 bytes from 192.168.0.204: icmp_seq=3 ttl=64 time=9.29 ms
64 bytes from 192.168.0.204: icmp_seq=4 ttl=64 time=8.09 ms
64 bytes from 192.168.0.204: icmp_seq=5 ttl=64 time=6.94 ms
64 bytes from 192.168.0.204: icmp_seq=6 ttl=64 time=6.50 ms
64 bytes from 192.168.0.204: icmp_seq=7 ttl=64 time=2.26 ms
64 bytes from 192.168.0.204: icmp_seq=8 ttl=64 time=3.46 ms
64 bytes from 192.168.0.204: icmp_seq=9 ttl=64 time=9.13 ms
64 bytes from 192.168.0.204: icmp_seq=14 ttl=64 time=14.3 ms
64 bytes from 192.168.0.204: icmp_seq=15 ttl=64 time=5.81 ms
64 bytes from 192.168.0.204: icmp_seq=16 ttl=64 time=8.16 ms
64 bytes from 192.168.0.204: icmp_seq=17 ttl=64 time=8.05 ms
64 bytes from 192.168.0.204: icmp_seq=18 ttl=64 time=4.78 ms
64 bytes from 192.168.0.204: icmp_seq=19 ttl=64 time=4.08 ms
^C64 bytes from 192.168.0.204: icmp_seq=20 ttl=64 time=7.67 ms
--- 192.168.0.204 ping statistics ---
20 packets transmitted, 16 received, 20% packet loss, time 19082ms
rtt min/avg/max/mdev = 2.201/7.435/18.182/4.051 ms
可以看到中间间隔了10,11,12和13是不存在的，丢了4个包，就是在这一时段切换造成的
keepalived多实例配置
#192.168.0.201配置
[root@why-1 keepalived]# cat keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
93216193@qq.com
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_1
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 150
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.0.205/24
}
}
vrrp_instance VI_2 {
state BACKUP
interface eth0
virtual_router_id 52
priority 50
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.0.204/24
}
}
#192.168.0.130配置
[root@why keepalived]# cat keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
93216193@qq.com
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_2
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.0.205/24
}
}
vrrp_instance VI_2 {
state MASTER
interface eth0
virtual_router_id 52
priority 150
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.0.204/24
}
}
keepalived多实例配置检验
同时启动192.168.0.130和192.168.0.202的keepalived
[root@why-1 keepalived]# /etc/init.d/keepalived start
正在启动 keepalived： [确定]
[root@why keepalived]# /etc/init.d/keepalived start
正在启动 keepalived： [确定]
分别在两端查看一下启动的ip
[root@why-1 keepalived]# ip add |egrep '204|205'
inet 192.168.0.205/24 scope global secondary eth0
[root@why keepalived]# ip add |egrep '204|205'
inet 192.168.0.204/24 scope global secondary eth0
与上述配置文件中配置的权重值和状态一致
192.168.0.201端关闭keepalived
[root@why-1 keepalived]# /etc/init.d/keepalived stop
停止 keepalived： [确定]
192.168.0.130端查看ip
[root@why keepalived]# ip add |egrep '204|205'
inet 192.168.0.204/24 scope global secondary eth0
inet 192.168.0.205/24 scope global secondary eth0
192.168.0.201端启动keepalived并查看ip
[root@why-1 keepalived]# /etc/init.d/keepalived start
正在启动 keepalived： [确定]
[root@why-1 keepalived]# ip add |egrep '204|205'
inet 192.168.0.205/24 scope global secondary eth0
192.168.0.130端查看ip
[root@why keepalived]# ip add |egrep '204|205'
inet 192.168.0.204/24 scope global secondary eth0
keepalived日志
默认日志位置
[root@why-1 keepalived]# tail -n 10 /var/log/messages
Jan 14 23:52:50 why-1 Keepalived_healthcheckers: Using LinkWatch kernel netlink reflector...
Jan 14 23:52:50 why-1 Keepalived_vrrp: VRRP_Instance(VI_2) Entering BACKUP STATE
Jan 14 23:52:50 why-1 Keepalived_vrrp: VRRP sockpool: [ifindex(2), proto(112), fd(10,11)]
Jan 14 23:52:51 why-1 Keepalived_vrrp: VRRP_Instance(VI_1) Transition to MASTER STATE
Jan 14 23:52:52 why-1 Keepalived_vrrp: VRRP_Instance(VI_1) Entering MASTER STATE
Jan 14 23:52:52 why-1 Keepalived_vrrp: VRRP_Instance(VI_1) setting protocol VIPs.
Jan 14 23:52:52 why-1 Keepalived_healthcheckers: Netlink reflector reports IP 192.168.0.205 added
Jan 14 23:52:52 why-1 Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.0.205
Jan 14 23:52:57 why-1 Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.0.205
Jan 14 23:59:31 why-1 kernel: IPVS: __ip_vs_del_service: enter
keepalived日志配置
[root@why-1 keepalived]# vi /etc/sysconfig/keepalived
# Options for keepalived. See `keepalived --help' output and keepalived(8) and
# keepalived.conf(5) man pages for a list of all options. Here are the most
# common ones :
#
# --vrrp -P Only run with VRRP subsystem.
# --check -C Only run with Health-checker subsystem.
# --dont-release-vrrp -V Dont remove VRRP VIPs & VROUTEs on daemon stop.
# --dont-release-ipvs -I Dont remove IPVS topology on daemon stop.
# --dump-conf -d Dump the configuration data.
# --log-detail -D Detailed log messages.
# --log-facility -S 0-7 Set local syslog facility (default=LOG_DAEMON)
#
#KEEPALIVED_OPTIONS="-D"
KEEPALIVED_OPTIONS="-D -d -S 0"
[root@why-1 keepalived]# echo 'local0.* /var/log/keepalived.log' >> /etc/rsyslog.conf
[root@why-1 keepalived]# tail -n 1 !$
tail -n 2 /etc/rsyslog.conf
local0.* /var/log/keepalived.log
重启并认证
[root@why-1 keepalived]# /etc/init.d/rsyslog restart
关闭系统日志记录器： [确定]
启动系统日志记录器： [确定]
[root@why-1 keepalived]# /etc/init.d/keepalived restart
停止 keepalived： [确定]
正在启动 keepalived： [确定]
[root@why-1 keepalived]# cat /var/log/keepalived.log
Jan 15 00:56:48 why-1 Keepalived: Terminating on signal
Jan 15 00:56:48 why-1 Keepalived: Stopping Keepalived v1.1.19 (01/14,2017)
Jan 15 00:56:48 why-1 Keepalived_vrrp: Terminating VRRP child process on signal
Jan 15 00:56:48 why-1 Keepalived_healthcheckers: Terminating Healthchecker child process on signal
Jan 15 00:56:49 why-1 Keepalived_vrrp: VRRP_Instance(VI_1) removing protocol VIPs.
Jan 15 00:56:49 why-1 Keepalived: Starting Keepalived v1.1.19 (01/14,2017)
Jan 15 00:56:49 why-1 Keepalived: Starting Healthcheck child process, pid=10401
Jan 15 00:56:49 why-1 Keepalived: Starting VRRP child process, pid=10402
Jan 15 00:56:49 why-1 Keepalived_vrrp: Netlink reflector reports IP 192.168.0.201 added
Jan 15 00:56:49 why-1 Keepalived_vrrp: Registering Kernel netlink reflector
Jan 15 00:56:49 why-1 Keepalived_vrrp: Registering Kernel netlink command channel
Jan 15 00:56:49 why-1 Keepalived_vrrp: Registering gratutious ARP shared channel
Jan 15 00:56:49 why-1 Keepalived_vrrp: Initializing ipvs 2.6
Jan 15 00:56:49 why-1 Keepalived_vrrp: Opening file '/etc/keepalived/keepalived.conf'.
Jan 15 00:56:49 why-1 Keepalived_healthcheckers: Initializing ipvs 2.6
Jan 15 00:56:49 why-1 Keepalived_healthcheckers: Netlink reflector reports IP 192.168.0.201 added
Jan 15 00:56:49 why-1 Keepalived_healthcheckers: Registering Kernel netlink reflector
Jan 15 00:56:49 why-1 Keepalived_healthcheckers: Registering Kernel netlink command channel
Jan 15 00:56:49 why-1 Keepalived_healthcheckers: Opening file '/etc/keepalived/keepalived.conf'.
Jan 15 00:56:49 why-1 Keepalived_healthcheckers: Configuration is using : 7151 Bytes
Jan 15 00:56:49 why-1 Keepalived_vrrp: Configuration is using : 66179 Bytes
Jan 15 00:56:49 why-1 Keepalived_vrrp: ------< Global definitions >------
Jan 15 00:56:49 why-1 Keepalived_vrrp: Router ID = LVS_1
Jan 15 00:56:49 why-1 Keepalived_vrrp: Smtp server = 10.0.0.1
Jan 15 00:56:49 why-1 Keepalived_vrrp: Smtp server connection timeout = 30
Jan 15 00:56:49 why-1 Keepalived_vrrp: Email notification from = Alexandre.Cassen@firewall.loc
Jan 15 00:56:49 why-1 Keepalived_vrrp: Email notification = 49000448@qq.com
Jan 15 00:56:49 why-1 Keepalived_vrrp: ------< VRRP Topology >------
Jan 15 00:56:49 why-1 Keepalived_vrrp: VRRP Instance = VI_1
Jan 15 00:56:49 why-1 Keepalived_vrrp: Want State = MASTER
Jan 15 00:56:49 why-1 Keepalived_vrrp: Runing on device = eth0
Jan 15 00:56:49 why-1 Keepalived_vrrp: Virtual Router ID = 51
Jan 15 00:56:49 why-1 Keepalived_vrrp: Priority = 150
Jan 15 00:56:49 why-1 Keepalived_vrrp: Advert interval = 1sec
Jan 15 00:56:49 why-1 Keepalived_vrrp: Authentication type = SIMPLE_PASSWORD
Jan 15 00:56:49 why-1 Keepalived_vrrp: Password = 1111
Jan 15 00:56:49 why-1 Keepalived_vrrp: Virtual IP = 1
Jan 15 00:56:49 why-1 Keepalived_vrrp: 192.168.0.205/24 brd 192.168.0.205 dev eth0 scope global
Jan 15 00:56:49 why-1 Keepalived_vrrp: VRRP Instance = VI_2
Jan 15 00:56:49 why-1 Keepalived_vrrp: Want State = BACKUP
Jan 15 00:56:49 why-1 Keepalived_vrrp: Runing on device = eth0
Jan 15 00:56:49 why-1 Keepalived_vrrp: Virtual Router ID = 52
Jan 15 00:56:49 why-1 Keepalived_vrrp: Priority = 50
Jan 15 00:56:49 why-1 Keepalived_vrrp: Advert interval = 1sec
Jan 15 00:56:49 why-1 Keepalived_vrrp: Authentication type = SIMPLE_PASSWORD
Jan 15 00:56:49 why-1 Keepalived_vrrp: Password = 1111
Jan 15 00:56:49 why-1 Keepalived_vrrp: Virtual IP = 1
Jan 15 00:56:49 why-1 Keepalived_vrrp: 192.168.0.204/24 brd 192.168.0.204 dev eth0 scope global
Jan 15 00:56:49 why-1 Keepalived_vrrp: Using LinkWatch kernel netlink reflector...
Jan 15 00:56:49 why-1 Keepalived_healthcheckers: ------< Global definitions >------
Jan 15 00:56:49 why-1 Keepalived_healthcheckers: Router ID = LVS_1
Jan 15 00:56:49 why-1 Keepalived_healthcheckers: Smtp server = 10.0.0.1
Jan 15 00:56:49 why-1 Keepalived_healthcheckers: Smtp server connection timeout = 30
Jan 15 00:56:49 why-1 Keepalived_healthcheckers: Email notification from = Alexandre.Cassen@firewall.loc
Jan 15 00:56:49 why-1 Keepalived_healthcheckers: Email notification = 49000448@qq.com
Jan 15 00:56:49 why-1 Keepalived_healthcheckers: ------< SSL definitions >------
Jan 15 00:56:49 why-1 Keepalived_healthcheckers: Using autogen SSL context
Jan 15 00:56:49 why-1 Keepalived_healthcheckers: Using LinkWatch kernel netlink reflector...
Jan 15 00:56:49 why-1 Keepalived_vrrp: VRRP_Instance(VI_2) Entering BACKUP STATE
Jan 15 00:56:49 why-1 Keepalived_vrrp: VRRP sockpool: [ifindex(2), proto(112), fd(10,11)]
Jan 15 00:56:50 why-1 Keepalived_vrrp: VRRP_Instance(VI_1) Transition to MASTER STATE
Jan 15 00:56:51 why-1 Keepalived_vrrp: VRRP_Instance(VI_1) Entering MASTER STATE
Jan 15 00:56:51 why-1 Keepalived_vrrp: VRRP_Instance(VI_1) setting protocol VIPs.
Jan 15 00:56:51 why-1 Keepalived_healthcheckers: Netlink reflector reports IP 192.168.0.205 added
Jan 15 00:56:51 why-1 Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.0.205
