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Keepalievd的安裝配置跟切換模擬

來源：程序員人生發布時間：2015-04-07 08:19:18 閱讀次數：4427次

2.1安裝環境介紹

目前打算在192.168.6.243和192.168.6.244這兩臺機器上安裝Keepalived（首先需要先安裝好MySQL，配置好Master-Master主主復制），虛擬IP（VIP）是192.168.6.252，在1臺機器上的MySQL出現故障后，VIP自動地漂移到另外1臺機器上。

查看下192.168.6.243的環境：

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，編譯有毛病）

下載地址：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安裝進程

2.1解壓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編譯

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

編譯出錯

configure: error:

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

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

說明系統中沒有安裝OpenSSL

那就安裝下OpenSS:L吧，出錯

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

Loaded plugins: rhnplugin, security

This system is not registered with RHN

緣由是linux沒有在紅帽網絡上注冊，所以沒法下載上面的軟件包，替換方案可使用centos（使用中國科技大學的源 http://mirror.centos.org），具體如何配置我就不寫了。

配置終了后，使用yum安裝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

再次編譯

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

編譯后的信息以下：

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的安裝路徑為：/usr/local/keepalived，--with-kernel-dir表示指定Linux的內核位置，由于Keepalived是建立在LVS之上的（Linux2.4內核以后，已完全內置了LVS的各個功能模塊，無需給內核打任何補釘，可以直接使用LVS提供的各種功能，關于LVS是甚么東東？可以百度之，也算是國人對Linux的1大貢獻，LVS的作者是畢業國防科技大學的章文嵩博士，現就職于淘寶網）。

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'

這樣的話，安裝就告1段落了，在192.168.6.243上也安裝一樣版本的Keepalived。

2.5查看安裝路徑的文件

[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查看幫助

[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

。。。。。。。。

可見版本是1.2.1，顯示也很正常

2.7創建配置文件

[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 #兩臺配置此處均是Backup

interface eth0 #VIP綁定在那塊網卡上

smtp_alert #開啟郵件報警

virtual_router_id 51

priority 100 #優先級，另外一臺改成90

advert_int1 #發送廣播信息的間隔時間，單位秒

preempt #搶占，只在優先級高的機器上設置便可，優先級低的機器不設置

authentication {

auth_typePASS

auth_pass1111

}

virtual_ipaddress {

192.168.6.252 #VIP

}

virtual_server 192.168.6.252 4321 {

delay_loop 2 #每一個2秒檢查1次real_server狀態

lb_algo wrr #LVS算法

lb_kind DR #LVS模式

persistence_timeout 60 #會話保持時間

protocol TCP

real_server 192.168.6.243 4321 {

weight 3

notify_down"/etc/keepalived/shutdown_keepalived.sh" #檢測到服務down后履行的腳本

TCP_CHECK {

connect_timeout 10 #連接超時時間

nb_get_retry 3 #重連次數

delay_before_retry #重連間隔時間

connect_port 4321 #健康檢查端口

}

global_defs ：全局定義，

notification_email：指定Keepalived在產生事件（如：自動切換），需要發送Email到的對象，可以為多個地址

notification_email_from：郵件發送者

smtp_server ：發送郵件的郵件服務器，如果本地有開啟sendmail的話，可以采取127.0.0.1

vrrp_instance VI_1 ：VRRP實例配置，包括了主從狀態、VIP、權重等

virtual_server：虛擬主機，包括了虛擬主機的IP+Port，實際主機的IP+Port，和檢查實際主機的IP+Port異常后的操作等

lb_algo：LVS中的負載均衡調度算法

lb_kind：LVS中的負載均衡轉發規則，1般包括DR,NAT,TUN3種，DR是效力最好的1種規則，直接路由轉發

[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

就是檢查到MySQL宕機后，自動殺死Keepalived進程，那末另外1臺機器上的Keepalived進程在接受廣播信息超時后，自動接收VIP，進入到Master狀態

上圖是Keepalived自動發送的郵件，這個很好，可對Keepalived的狀態變更自動監控

2.8啟動Keepalived

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

默許情況下，Keepalived的配置文件是/etc/keepalived/keepalived.conf

查看日志文件，Keepalived默許的日志文件是/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的安裝配置告1段落了。

2.9 Keepalived在RHEL 6.2中的特別的地方

Keepalived在RHEL 6.2中，不會自動的加載ipvs模塊，可以通過下面命令來確認是不是已加載：

lsmod|grep ip_vs

所以依照上述方式安裝后，日志文件(默許是:/var/log/messages)中出現以下報警信息，“Keepalived_healthcheckers:IPVS: Can't initialize ipvs: Protocol not available”，ipvs稱之為IP 虛擬服務器（IP Virtual Server），主要是運行在LVS下的提供負載平衡功能的1種技術，而實際上，我們使用的keepalived并沒有使用負載均衡的功能，只是使用虛擬IP自動漂移的部份，所以呢，即使是沒有找到，keepalived也是正常運轉的，不影響正常使用。

這樣，我們就需要手工加載ipvs模塊，命令以下：

modprobeip_vs

modprobeip_vs_wrr

再重啟keepalived便可，即下面的兩條命令：

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

/usr/local/keepalived/sbin/keepalived -D --啟動

再次視察日志文件，可以看到，上述的報警信息就再也沒有出現了。

2.Keepalived之摹擬測試

3.1測試VIP是不是可用

在啟動192.168.6.243和192.168.6.244兩臺機器上的Keepalived后（正常與否，需要檢查日志文件/var/log/messages）,，利用MySQL的客戶端連接之，看是不是可用登陸

下面我就在192.168.6.49這臺機器上，遠程登陸192.168.6.252:4321（虛擬IP+虛擬端口），看是不是可以正常登陸之

[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>

可見1切才正常，可以正常登陸之

3.2摹擬MySQL掛掉

下面我們摹擬MySQL掛掉后，看VIP是不是會自動地被另外1臺機器接收。

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

可見192.168.6.243上的Keepalived是Master狀態

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.

可見192.168.6.243上的Keepalived處于Slave狀態

3.2.3 關閉掉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

可見192.168.6.243上的Keepalived對實際服務器進行了健康檢查，失敗之，觸發腳本/etc/keepalived/shutdown_keepalived.sh的履行，發送報警郵件

3.2.5 查看192.168.6.243上的Keepalived進程

[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進程已不存在

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'.

可見192.168.6.243自動接收了192.168.6.252的管理

3.2.7 測試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>

可見VIP+虛擬Port仍然可以正常訪問，這時候候實際服務器是MySQL⑴92.168.6.243

3.2.8 啟動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 啟動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

可見192.168.6.243重新進入Master狀態，這里需要注意的是：配置文件中我配置的是搶占式，如果是不搶占的話，192.168.6.243重啟后會進入Slave狀態，不會產生Master的搶占。

! 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 以上有個模塊自動加載 lsmod|grep ip_vs modprobe ip_vs modprobe ip_vs_wrr ################################################################### sh /etc/keepalived/shutdown_keepalived.sh 1、啟動keepalived /usr/local/keepalived/sbin/keepalived -D 改變日志目錄 /usr/local/keepalived/sbin/keepalived -d -D -S 0 修改文件vi /etc/rsyslog.conf（RHEL 6.2中rsyslog服務對應的配置文件為/etc/rsyslog.conf），添加1行，添加最后的結果以下： # 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這個文件就是我們自定義的文件。再重啟1下syslog服務（在RHEL 6.2中，syslog的服務名已名為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.

可見192.168.6.243自動的進入Slave狀態

3.3摹擬Keepalvied掛掉

其實3.2中已包括了3.3（摹擬Keepalived掛掉）這類的場景，這里就不再敘述，詳見3.2

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Keepalievd的安裝配置跟切換模擬

2.1安裝環境介紹

2.2安裝進程

2.1解壓keepalived⑴.2.1.tar.gz

2.2編譯

2.3履行make 操作

2.4履行make install 操作

2.5查看安裝路徑的文件

2.6查看幫助

2.7創建配置文件

2.8啟動Keepalived

2.9 Keepalived在RHEL 6.2中的特別的地方

2.Keepalived之摹擬測試

3.1測試VIP是不是可用

3.2摹擬MySQL掛掉

3.2.1 查看192.168.6.243上的Keepalived日志

3.2.2 查看192.168.6.244上的Keepalived日志

3.2.3 關閉掉192.168.6.243上的MySQL

3.2.4 查看192.168.6.243上的Keepalived日志

3.2.6 查看192.168.6.244上的Keepalived日志

3.2.7 測試VIP是不是可用

3.2.8 啟動192.168.6.243上的MySQL

3.2.9 啟動192.168.6.243上的Keepalived

3.2.10 查看192.168.6.243上的Keepalived日志

3.2.11 查看192.168.6.244上的Keepalived日志

3.3摹擬Keepalvied掛掉