Keepalievd的安装配置跟切换模拟

栏目：服务器时间：2015-04-07 08:19:18

2.1安装环境介绍

目前打算在192.168.6.243和192.168.6.244这两台机器上安装Keepalived（首先需要先安装好MySQL，配置好Master-Master主主复制），虚拟IP（VIP）是192.168.6.252，在1台机器上的MySQL出现故障后，VIP自动地漂移到另外1台机器上。

查看下192.168.6.243的环境：

OS： Linuxmds-Master 2.6.18⑵38.el5 #1 SMP Sun Dec 19 14:22:44 EST 2010 x86_64 x86_64x86_64 GNU/Linux

CPU：8*Intel(R)Xeon(R) CPU E5506 @ 2.13GHz

Mem：32G

Keepalived的相干信息：

Version：1.2.1（注意：不要使用最新版本1.2.2，编译有毛病）

下载地址：http://www.keepalived.org/download.html

MySQL的相干信息

Version：5.1.47+XtraDB

MySQL_Install_Dictory： /usr/local/mysql

MySQL_Config_File：/home/mysql/mysq/my1.cnf

2.2安装进程

2.1解压keepalived⑴.2.1.tar.gz

[mysql@mds-Master tool]$ cd /home/wangwei/tools

[mysql@mds-Master tool]$ tar xvzf keepalived⑴.2.1.tar.gz

2.2编译

[wangwei@mds-Masterkeepalived⑴.2.1]$./configure --prefix=/usr/local/keepalived --with-kernel-dir=/usr/src/kernels/2.6.18⑵38.el5-x86_64

编译出错

configure: error:

!!! OpenSSLis not properly installed on your system. !!!

!!! Can notinclude OpenSSL headers files. !!!

说明系统中没有安装OpenSSL

那就安装下OpenSS:L吧，出错

[mysql@mds-Master tool]# yum install openssl-devel

Loaded plugins: rhnplugin, security

This system is not registered with RHN

缘由是linux没有在红帽网络上注册，所以没法下载上面的软件包，替换方案可使用centos（使用中国科技大学的源 http://mirror.centos.org），具体如何配置我就不写了。

配置终了后，使用yum安装openssl-devel：

[root@mds-Master tools]# yum install openssl-devel

Dependency Installed:

e2fsprogs-devel.x86_64 0:1.39⑵3.el5_5.1 keyutils-libs-devel.x86_64 0:1.2⑴.el5 krb5-devel.x86_64 0:1.6.1⑸5.el5_6.2

libselinux-devel.x86_64 0:1.33.4⑸.7.el5 libsepol-devel.x86_64 0:1.15.2⑶.el5 zlib-devel.x86_64 0:1.2.3⑶

Complete

再次编译

[root@mds-Master keepalived⑴.2.1]#./configure --prefix=/usr/local/keepalived --with-kernel-dir=/usr/src/kernels/2.6.18⑵38.el5-x86_64

编译后的信息以下：

Keepalived configuration

------------------------

Keepalived version : 1.2.1

Compiler : gcc

Compiler flags : -g -O2 -DETHERTYPE_IPV6=0x86dd

Extra Lib : -lpopt -lssl -lcrypto

Use IPVS Framework : Yes

IPVS sync daemon support : Yes

Use VRRP Framework : Yes

Use Debug flags : No

Keepalived的安装路径为：/usr/local/keepalived，--with-kernel-dir表示指定Linux的内核位置，由于Keepalived是建立在LVS之上的（Linux2.4内核以后，已完全内置了LVS的各个功能模块，无需给内核打任何补钉，可以直接使用LVS提供的各种功能，关于LVS是甚么东东？可以百度之，也算是国人对Linux的1大贡献，LVS的作者是毕业国防科技大学的章文嵩博士，现就职于淘宝网）。

2.3履行make 操作

[root@mds-Master keepalived⑴.2.1]# make

Make complete

make[1]: Leaving directory`/home/wangwei/tools/keepalived⑴.2.1/genhash'

Make complete

2.4履行make install 操作

[root@mds-Masterkeepalived⑴.2.1]# make install

make -C keepalived install

。。。。。。。。。。。。。。。。

install -m 644 ../doc/man/man1/genhash.1 /usr/local/keepalived/share/man/man1

make[1]: Leaving directory`/home/wangwei/tools/keepalived⑴.2.1/genhash'

这样的话，安装就告1段落了，在192.168.6.243上也安装一样版本的Keepalived。

2.5查看安装路径的文件

[root@mds-Master ~]# ls -lh /usr/local/keepalived/

total 16K

drwxr-xr-x 2 root root 4.0K Jul 5 08:54 bin

drwxr-xr-x 5 root root 4.0K Jul 5 08:54 etc

drwxr-xr-x 2 root root 4.0K Jul 5 08:54 sbin

drwxr-xr-x 3 root root 4.0K Jul 5 08:54 share

2.6查看帮助

[root@mds-Master ~]#/usr/local/keepalived/sbin/keepalived --help

Keepalived v1.2.1 (07/04,2011)

Usage:

/usr/local/keepalived/sbin/keepalived

/usr/local/keepalived/sbin/keepalived -n

/usr/local/keepalived/sbin/keepalived -f keepalived.conf

/usr/local/keepalived/sbin/keepalived -d

/usr/local/keepalived/sbin/keepalived -h

/usr/local/keepalived/sbin/keepalived-v

。。。。。。。。

可见版本是1.2.1，显示也很正常

2.7创建配置文件

[root@mds-Master ~]# more/etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

notification_email {

wei.wang@99bill.com

}

notification_email_from wei.wang@99bill.com

smtp_server 127.0.0.1

smtp_connect_timeout 30

router_id MySQL-HA

}

vrrp_instance VI_1 {

state Backup #两台配置此处均是Backup

interface eth0 #VIP绑定在那块网卡上

smtp_alert #开启邮件报警

virtual_router_id 51

priority 100 #优先级，另外一台改成90

advert_int1 #发送广播信息的间隔时间，单位秒

preempt #抢占，只在优先级高的机器上设置便可，优先级低的机器不设置

authentication {

auth_typePASS

auth_pass1111

}

virtual_ipaddress {

192.168.6.252 #VIP

}

virtual_server 192.168.6.252 4321 {

delay_loop 2 #每一个2秒检查1次real_server状态

lb_algo wrr #LVS算法

lb_kind DR #LVS模式

persistence_timeout 60 #会话保持时间

protocol TCP

real_server 192.168.6.243 4321 {

weight 3

notify_down"/etc/keepalived/shutdown_keepalived.sh" #检测到服务down后履行的脚本

TCP_CHECK {

connect_timeout 10 #连接超时时间

nb_get_retry 3 #重连次数

delay_before_retry #重连间隔时间

connect_port 4321 #健康检查端口

}

global_defs ：全局定义，

notification_email：指定Keepalived在产生事件（如：自动切换），需要发送Email到的对象，可以为多个地址

notification_email_from：邮件发送者

smtp_server ：发送邮件的邮件服务器，如果本地有开启sendmail的话，可以采取127.0.0.1

vrrp_instance VI_1 ：VRRP实例配置，包括了主从状态、VIP、权重等

virtual_server：虚拟主机，包括了虚拟主机的IP+Port，实际主机的IP+Port，和检查实际主机的IP+Port异常后的操作等

lb_algo：LVS中的负载均衡调度算法

lb_kind：LVS中的负载均衡转发规则，1般包括DR,NAT,TUN3种，DR是效力最好的1种规则，直接路由转发

[root@mds-Master ~]# /etc/init.d/sendmail status

sendmail (pid 31476) is running...

You have new mail in /var/spool/mail/root

[mysql@mds-Master tool]$ more/etc/keepalived/shutdown_keepalived.sh

#!/bin/sh

pkill keepalived

就是检查到MySQL宕机后，自动杀死Keepalived进程，那末另外1台机器上的Keepalived进程在接受广播信息超时后，自动接收VIP，进入到Master状态

上图是Keepalived自动发送的邮件，这个很好，可对Keepalived的状态变更自动监控

2.8启动Keepalived

[root@mds-Master ~]#/usr/local/keepalived/sbin/keepalived -D

默许情况下，Keepalived的配置文件是/etc/keepalived/keepalived.conf

查看日志文件，Keepalived默许的日志文件是/var/log/messages

[root@mds-Master ~]# tail ⑴0 /var/log/messages

Jul 11 17:26:10 mds-Master Keepalived_vrrp:Registering Kernel netlink reflector

Jul 11 17:26:10 mds-Master Keepalived_vrrp:Registering Kernel netlink command channel

Jul 11 17:26:10 mds-Master Keepalived_vrrp:Registering gratutious ARP shared channel

Jul 11 17:26:10 mds-Master Keepalived_vrrp: Openingfile '/etc/keepalived/keepalived.conf'.

Jul 11 17:26:10 mds-Master Keepalived_vrrp:Configuration is using : 63222 Bytes

Jul 11 17:26:10 mds-Master Keepalived_vrrp: UsingLinkWatch kernel netlink reflector...

Jul 11 17:26:10 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) Entering Backup STATE

Jul 11 17:26:10 mds-Master Keepalived_vrrp: VRRPsockpool: [ifindex(2), proto(112), fd(11,12)]

Jul 11 17:26:11 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) forcing a new Master election

Jul 11 17:26:12 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) Transition to Master STATE

Jul 11 17:26:13 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) Entering Master STATE

Jul 11 17:26:13 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) setting protocol VIPs.

Jul 11 17:26:13 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.6.252

至此，Keepalived的安装配置告1段落了。

2.9 Keepalived在RHEL 6.2中的特别的地方

Keepalived在RHEL 6.2中，不会自动的加载ipvs模块，可以通过下面命令来确认是不是已加载：

lsmod|grep ip_vs

所以依照上述方式安装后，日志文件(默许是:/var/log/messages)中出现以下报警信息，“Keepalived_healthcheckers:IPVS: Can't initialize ipvs: Protocol not available”，ipvs称之为IP 虚拟服务器（IP Virtual Server），主要是运行在LVS下的提供负载平衡功能的1种技术，而实际上，我们使用的keepalived并没有使用负载均衡的功能，只是使用虚拟IP自动漂移的部份，所以呢，即使是没有找到，keepalived也是正常运转的，不影响正常使用。

这样，我们就需要手工加载ipvs模块，命令以下：

modprobeip_vs

modprobeip_vs_wrr

再重启keepalived便可，即下面的两条命令：

Sh/etc/keepalived/shutdown_keepalived.sh --关闭

/usr/local/keepalived/sbin/keepalived -D --启动

再次视察日志文件，可以看到，上述的报警信息就再也没有出现了。

2.Keepalived之摹拟测试

3.1测试VIP是不是可用

在启动192.168.6.243和192.168.6.244两台机器上的Keepalived后（正常与否，需要检查日志文件/var/log/messages）,，利用MySQL的客户端连接之，看是不是可用登陆

下面我就在192.168.6.49这台机器上，远程登陆192.168.6.252:4321（虚拟IP+虚拟端口），看是不是可以正常登陆之

[root@mrs_test ~]# hostname -i

192.168.6.49

[root@mrs_test ~]# mysql -h192.168.6.252 -P4321-uwangwei -ptianma

Welcome to the MySQL monitor. Commands end with ; or g.

Your MySQL connection id is 295

Server version: 5.1.47-log Source distribution

Type 'help;' or 'h' for help. Type 'c' to clearthe buffer.

mysql> status

--------------

mysql Ver14.14 Distrib 5.1.33, for pc-linux-gnu (i686) using readline 5.1

Connection id: 295

Current database:

Current user: wangwei@192.168.6.49

SSL: Not in use

Current pager: stdout

Using outfile: ''

Using delimiter: ;

Server version: 5.1.47-log Source distribution

Protocol version: 10

Connection: 192.168.6.252 via TCP/IP

Server characterset: utf8

Db characterset: utf8

Client characterset: latin1

Conn. characterset: latin1

TCP port: 4321

Uptime: 10 min 32 sec

Threads: 2 Questions: 10 Slow queries:0 Opens: 14 Flush tables: 1 Open tables: 8 Queries per second avg: 0.15

--------------

mysql>

可见1切才正常，可以正常登陆之

3.2摹拟MySQL挂掉

下面我们摹拟MySQL挂掉后，看VIP是不是会自动地被另外1台机器接收。

3.2.1 查看192.168.6.243上的Keepalived日志

[root@mds-Master ~]# tail ⑴0 /var/log/messages

Jul 12 10:26:24 mds-Master Keepalived_vrrp: RemoteSMTP server [127.0.0.1:25] connected.

Jul 12 10:26:24 mds-Master Keepalived_vrrp: SMTPalert successfully sent.

Jul 12 10:26:25 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) forcing a new Master election

Jul 12 10:26:26 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) Transition to Master STATE

Jul 12 10:26:27 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) Entering Master STATE

Jul 12 10:26:27 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) setting protocol VIPs.

Jul 12 10:26:27 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.6.252

Jul 12 10:26:27 mds-Master Keepalived_vrrp: RemoteSMTP server [127.0.0.1:25] connected.

Jul 12 10:26:27 mds-Master Keepalived_vrrp: SMTPalert successfully sent.

Jul 12 10:26:32 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.6.252

可见192.168.6.243上的Keepalived是Master状态

3.2.2 查看192.168.6.244上的Keepalived日志

[root@mds-slave ~]# tail ⑴0 /var/log/messages

Jul 12 10:26:40 mds-slave avahi-daemon[4968]:Registering new address record for 192.168.6.252 on eth0.

Jul 12 10:26:40 mds-slave avahi-daemon[4968]:Registering new address record for 192.168.6.244 on eth0.

Jul 12 10:26:40 mds-slave avahi-daemon[4968]:Registering HINFO record with values 'X86_64'/'LINUX'.

Jul 12 10:26:56 mds-slave Keepalived_vrrp:VRRP_Instance(VI_1) Received higher prio advert

Jul 12 10:26:56 mds-slave Keepalived_vrrp:VRRP_Instance(VI_1) Entering Backup STATE

Jul 12 10:26:56 mds-slave Keepalived_vrrp:VRRP_Instance(VI_1) removing protocol VIPs.

Jul 12 10:26:56 mds-slave Keepalived_vrrp: Netlinkreflector reports IP 192.168.6.244 removed

Jul 12 10:26:56 mds-slave Keepalived_healthcheckers:Netlink reflector reports IP 192.168.6.244 removed

Jul 12 10:26:56 mds-slave avahi-daemon[4968]:Server startup complete. Host name is mds-slave⑸1.local. Local service cookieis 479334863.

Jul 12 10:26:56 mds-slave avahi-daemon[4968]:Withdrawing address record for 192.168.6.252 on eth0.

可见192.168.6.243上的Keepalived处于Slave状态

3.2.3 关闭掉192.168.6.243上的MySQL

[mysql@mds-Master mysql]$ mysqladmin--defaults-file=my1.cnf -uroot -p99billshutdown

110712 10:50:16 mysqld_safe mysqld from pid file/home/mysql/mysql/mysql/mysqld.pid ended

[1]+ Done /usr/local/mysql/bin/mysqld_safe --defaults-file=my1.cnf

3.2.4 查看192.168.6.243上的Keepalived日志

[root@mds-Master ~]# tail ⑴0 /var/log/messages

Jul 12 10:26:32 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.6.252

Jul 12 10:50:09 mds-MasterKeepalived_healthcheckers: TCP connection to [192.168.6.243:4321] failed !!!

Jul 12 10:50:09 mds-MasterKeepalived_healthcheckers: Removing service [192.168.6.243:4321] from VS[192.168.6.252:4321]

Jul 12 10:50:09 mds-MasterKeepalived_healthcheckers: Executing [/etc/keepalived/shutdown_keepalived.sh]for service [192.168.6.243:4321] in VS [192.168.6.252:4321]

Jul 12 10:50:09 mds-MasterKeepalived_healthcheckers: Lost quorum 1-0=1 > 0 for VS [192.168.6.252:4321]

Jul 12 10:50:09 mds-MasterKeepalived_healthcheckers: Remote SMTP server [127.0.0.1:25] connected.

Jul 12 10:50:09 mds-Master Keepalived: Terminatingon signal

Jul 12 10:50:09 mds-Master Keepalived_vrrp:Terminating VRRP child process on signal

Jul 12 10:50:09 mds-Master Keepalived: StoppingKeepalived v1.2.1 (07/04,2011)

Jul 12 10:50:09 mds-MasterKeepalived_healthcheckers: Terminating Healthchecker child process on signal

可见192.168.6.243上的Keepalived对实际服务器进行了健康检查，失败之，触发脚本/etc/keepalived/shutdown_keepalived.sh的履行，发送报警邮件

3.2.5 查看192.168.6.243上的Keepalived进程

[root@mds-Master ~]# ps aux |grep keep

root 20370 0.0 0.0 61188 768 pts/4 S+ 10:54 0:00 grep keep

Keepalived进程已不存在

3.2.6 查看192.168.6.244上的Keepalived日志

[root@mds-slave ~]# tail ⑴0 /var/log/messages

Jul 12 10:52:38 mds-slave avahi-daemon[4968]:Registering new address record for 192.168.6.252 on eth0.

Jul 12 10:52:38 mds-slave avahi-daemon[4968]:Registering new address record for 192.168.6.244 on eth0.

Jul 12 10:52:38 mds-slave avahi-daemon[4968]:Registering HINFO record with values 'X86_64'/'LINUX'.

Jul 12 10:52:58 mds-slave avahi-daemon[4968]:Withdrawing address record for fe80::baac:6fff:fe15:bf64 on eth0.

Jul 12 10:52:58 mds-slave avahi-daemon[4968]:Withdrawing address record for 192.168.6.244 on eth0.

Jul 12 10:52:58 mds-slave avahi-daemon[4968]:Registering new address record for fe80::baac:6fff:fe15:bf64 on eth0.

Jul 12 10:52:58 mds-slave avahi-daemon[4968]:Registering new address record for 192.168.6.252 on eth0.

Jul 12 10:52:58 mds-slave avahi-daemon[4968]:Registering new address record for 192.168.6.244 on eth0.

Jul 12 10:52:58 mds-slave avahi-daemon[4968]:Registering HINFO record with values 'X86_64'/'LINUX'.

可见192.168.6.243自动接收了192.168.6.252的管理

3.2.7 测试VIP是不是可用

[root@mrs_test ~]# hostname -i

192.168.6.49

[root@mrs_test ~]# mysql -h192.168.6.252 -P4321-uwangwei -ptianma

Welcome to the MySQL monitor. Commands end with ; or g.

Your MySQL connection id is 293927

Server version: 5.1.47-log Source distribution

Type 'help;' or 'h' for help. Type 'c' to clearthe buffer.

mysql> status

--------------

mysql Ver14.14 Distrib 5.1.33, for pc-linux-gnu (i686) using readline 5.1

Connection id: 293927

Current database:

Current user: wangwei@192.168.6.49

SSL: Not in use

Current pager: stdout

Using outfile: ''

Using delimiter: ;

Server version: 5.1.47-log Source distribution

Protocol version: 10

Connection: 192.168.6.252 via TCP/IP

Server characterset: utf8

Db characterset: utf8

Client characterset: latin1

Conn. characterset: latin1

TCP port: 4321

Uptime: 6 days 19 hours 13 min 2 sec

Threads: 2 Questions: 1645 Slow queries:0 Opens: 175 Flush tables: 1 Open tables: 62 Queries per second avg: 0.2

--------------

mysql>

可见VIP+虚拟Port仍然可以正常访问，这时候候实际服务器是MySQL⑴92.168.6.243

3.2.8 启动192.168.6.243上的MySQL

[mysql@mds-Master mysql]$ /usr/local/mysql/bin/mysqld_safe --defaults-file=my1.cnf &

[1] 20374

[mysql@mds-Master mysql]$ 110712 10:55:06mysqld_safe Logging to '/home/mysql/mysql/mysql/mysqld.log'.

110712 10:55:06 mysqld_safe Starting mysqld daemonwith databases from /home/mysql/mysql/mysql

3.2.9 启动192.168.6.243上的Keepalived

[root@mds-Master ~]#/usr/local/keepalived/sbin/keepalived -D

3.2.10 查看192.168.6.243上的Keepalived日志

[root@mds-Master ~]# tail ⑴0 /var/log/messages

Jul 12 10:55:47 mds-Master Keepalived_vrrp: RemoteSMTP server [127.0.0.1:25] connected.

Jul 12 10:55:48 mds-Master Keepalived_vrrp: SMTPalert successfully sent.

Jul 12 10:55:48 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) forcing a new Master election

Jul 12 10:55:49 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) Transition to Master STATE

Jul 12 10:55:50 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) Entering Master STATE

Jul 12 10:55:50 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) setting protocol VIPs.

Jul 12 10:55:50 mds-Master Keepalived_vrrp:VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.6.252

Jul 12 10:55:50 mds-Master Keepalived_vrrp: RemoteSMTP server [127.0.0.1:25] connected.

Jul 12 10:55:50 mds-Master Keepalived_vrrp: SMTPalert successfully sent.

Jul 12 10:55:55 mds-Master Keepalived_vrrp: VRRP_Instance(VI_1)Sending gratuitous ARPs on eth0 for 192.168.6.252

可见192.168.6.243重新进入Master状态，这里需要注意的是：配置文件中我配置的是抢占式，如果是不抢占的话，192.168.6.243重启后会进入Slave状态，不会产生Master的抢占。

! Configuration File for keepalived global_defs { notification_email { haiying.sun@99bill.com qian.pan@99bill.com 13918456836@139.com } notification_email_from mysql@account.99bill.com smtp_server 172.16.80.103 smtp_connect_timeout 30 router_id MySQL-MDS-HA } vrrp_instance VI_2 { state Backup interface bond0 smtp_alert virtual_router_id 61 priority 80 advert_int 1 # preempt authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.6.231 #VIP } } virtual_server 192.168.6.231 3306 { delay_loop 2 lb_algo wrr lb_kind DR persistence_timeout 60 protocol TCP real_server 192.168.6.203 3306 { weight 3 notify_down "/etc/keepalived/shutdown_keepalived.sh" TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry connect_port 3306 } } } ################################################################### os 6.2 以上有个模块自动加载 lsmod|grep ip_vs modprobe ip_vs modprobe ip_vs_wrr ################################################################### sh /etc/keepalived/shutdown_keepalived.sh 1、启动keepalived /usr/local/keepalived/sbin/keepalived -D 改变日志目录 /usr/local/keepalived/sbin/keepalived -d -D -S 0 修改文件vi /etc/rsyslog.conf（RHEL 6.2中rsyslog服务对应的配置文件为/etc/rsyslog.conf），添加1行，添加最后的结果以下： # Save boot messages also to boot.log local7.* /var/log/boot.log # keepalived -S 0 local0.* /var/log/keepalived.log 其中/var/log/keepalived.log这个文件就是我们自定义的文件。再重启1下syslog服务（在RHEL 6.2中，syslog的服务名已名为rsyslog） /etc/init.d/rsyslog restart

3.2.11 查看192.168.6.244上的Keepalived日志

[root@mds-slave ~]# tail ⑴0 /var/log/messages

Jul 12 10:56:18 mds-slave avahi-daemon[4968]:Registering new address record for 192.168.6.252 on eth0.

Jul 12 10:56:18 mds-slave avahi-daemon[4968]:Registering new address record for 192.168.6.244 on eth0.

Jul 12 10:56:18 mds-slave avahi-daemon[4968]: RegisteringHINFO record with values 'X86_64'/'LINUX'.

Jul 12 10:56:19 mds-slave Keepalived_vrrp:VRRP_Instance(VI_1) Received higher prio advert

Jul 12 10:56:19 mds-slave Keepalived_vrrp:VRRP_Instance(VI_1) Entering Backup STATE

Jul 12 10:56:19 mds-slave Keepalived_vrrp:VRRP_Instance(VI_1) removing protocol VIPs.

Jul 12 10:56:19 mds-slave Keepalived_vrrp: Netlinkreflector reports IP 192.168.6.244 removed

Jul 12 10:56:19 mds-slave avahi-daemon[4968]:Withdrawing address record for 192.168.6.252 on eth0.

Jul 12 10:56:19 mds-slaveKeepalived_healthcheckers: Netlink reflector reports IP 192.168.6.244 removed

Jul 12 10:56:20 mds-slave avahi-daemon[4968]:Server startup complete. Host name is mds-slave⑻1.local. Local service cookieis 479334863.

可见192.168.6.243自动的进入Slave状态

3.3摹拟Keepalvied挂掉

其实3.2中已包括了3.3（摹拟Keepalived挂掉）这类的场景，这里就不再叙述，详见3.2

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