yum install resource-agents pacemaker

12. 修改heartbeat配置文件(以下步驟需要在2臺(tái)node上執(zhí)行)

復(fù)制配置文件,資源文件,認(rèn)證密鑰文件

cp /usr/share/doc/heartbeat-3.0.4/ha.cf /etc/ha.d/

cp /usr/share/doc/heartbeat-3.0.4/haresources /etc/ha.d/

cp /usr/share/doc/heartbeat-3.0.4/authkeys /etc/ha.d/

之后編輯 配置文件。

vi /etc/ha.d/ha.cf

logfile /var/log/ha-log ?(主要檢查日志文件)

logfacility? ? local0

keepalive 1 ? ? ? ? ? ?#定義心跳頻率1s

deadtime 10? ? ? ? ? ? #如果其他節(jié)點(diǎn)10S內(nèi)沒(méi)有回應(yīng)，則確認(rèn)其死亡

warntime 5? ? ? ? ? ? #確認(rèn)一個(gè)節(jié)點(diǎn)連接不上5S之后將警告信息寫(xiě)入日志

initdead 60 ? ? ? ? ? ? #在其他節(jié)點(diǎn)死掉之后，系統(tǒng)啟動(dòng)前需要等待的時(shí)間，一般為deadtime的兩倍

udpport 694 ? ? ? ? ?#端口號(hào)。

ucast eth0 192.168.135.129(對(duì)端IP) ?#對(duì)端的IP,在備機(jī)上改為192.168.135.130(本機(jī)IP)

auto_failback ? off

node ? ?web1 (IP)

node ? ?web2 (IP)

chmod 600 /etc/ha.d/authkeys

vi /etc/ha.d/authkeys

auth 1

1 ? ? ? ? ?crc

vi /etc/ha.d/haresources

web1 IPaddr::192.168.135.0/24/eth1 drbddisk::r0 Filesystem::/dev/drbd1::/drbd::ext3 httpd

資源文件說(shuō)明：

test1– the hosname that will be the primary node

drbddisk::r0 – activate the r0 resource disk (make sure r0 corresponds to whatever your resource is named)

Filesystem::/dev/drbd1::/drbd::ext3 – mount /dev/drbd1 on /drbd as ext3 filesystem

nginx–the service we’re going to watch over and take care of, in this case nginx(which wasn’t really what I was configuring, but it’s the easiest to show as an example)

安裝Keepalived

yum install keepalived 當(dāng)然我說(shuō)的是yum 安裝 ，也可以去官網(wǎng)?http://www.keepalived.org/software/

找到你所需要的 版本。

[root@web1 ~]# keepalived --help Keepalived v1.2.7 (02/21,2013) Usage: keepalived keepalived -n keepalived -f keepalived.conf keepalived -d keepalived -h keepalived -v Commands: Either long or short options are allowed. keepalived --vrrp -P Only run with VRRP subsystem. keepalived --check -C Only run with Health-checker subsystem. keepalived --dont-release-vrrp -V Dont remove VRRP VIPs & VROUTEs on daemon stop. keepalived --dont-release-ipvs -I Dont remove IPVS topology on daemon stop. keepalived --dont-fork -n Dont fork the daemon process. keepalived --use-file -f Use the specified configuration file. Default is /etc/keepalived/keepalived.conf. keepalived --dump-conf -d Dump the configuration data. keepalived --log-console -l Log message to local console. keepalived --log-detail -D Detailed log messages. keepalived --log-facility -S 0-7 Set syslog facility to LOG_LOCAL[0-7]. (default=LOG_DAEMON) keepalived --snmp -x Enable SNMP subsystem keepalived --help -h Display this short inlined help screen. keepalived --version -v Display the version number keepalived --pid -p pidfile keepalived --checkers_pid -c checkers pidfile keepalived --vrrp_pid -r vrrp pidfile

安裝 lvs

可伸縮網(wǎng)絡(luò)服務(wù)的幾種結(jié)構(gòu)，它們都需要一個(gè)前端的負(fù)載調(diào)度器(或者多個(gè)進(jìn)行主從備份)。我們先分析實(shí)現(xiàn)虛擬網(wǎng)絡(luò)服務(wù)的主要技術(shù)，指出IP負(fù)載均衡技術(shù)是在負(fù)載調(diào)度器的實(shí)現(xiàn)技術(shù)中效率最高的。在已有的IP負(fù)載均衡技術(shù)中，主要有通過(guò)網(wǎng)絡(luò)地址轉(zhuǎn)換(Network Address Translation)將一組服務(wù)器構(gòu)成一個(gè)高性能的、高可用的虛擬服務(wù)器，我們稱(chēng)之為VS/NAT技術(shù)(Virtual Server via Network Address Translation)。在分析VS/NAT的缺點(diǎn)和網(wǎng)絡(luò)服務(wù)的非對(duì)稱(chēng)性的基礎(chǔ)上，我們提出了通過(guò)IP隧道實(shí)現(xiàn)虛擬服務(wù)器的方法VS/TUN (Virtual Server via IP Tunneling)，和通過(guò)直接路由實(shí)現(xiàn)虛擬服務(wù)器的方法VS/DR(Virtual Server via Direct Routing)，它們可以極大地提高系統(tǒng)的伸縮性。VS/NAT、VS/TUN和VS/DR技術(shù)是LVS集群中實(shí)現(xiàn)的三種IP負(fù)載均衡技術(shù)。

yum install ?lpvsadm

[root@web1 ~]# ipvsadm --help

ipvsadm v1.25 2008/5/15 (compiled with popt and IPVS v1.2.1)

Usage:

ipvsadm -A|E -t|u|f service-address [-s scheduler] [-p [timeout]] [-M netmask]

ipvsadm -D -t|u|f service-address

ipvsadm -C

ipvsadm -R

ipvsadm -S [-n]

ipvsadm -a|e -t|u|f service-address -r server-address [options]

ipvsadm -d -t|u|f service-address -r server-address

ipvsadm -L|l [options]

ipvsadm -Z [-t|u|f service-address]

ipvsadm --set tcp tcpfin udp

ipvsadm --start-daemon state [--mcast-interface interface] [--syncid sid]

ipvsadm --stop-daemon state

ipvsadm -h

看到提示后 安裝成功。

我們可以通過(guò) heartbeat 搭建 LVS 高可用集群。

也可以通過(guò) Keepalived 搭建 LVS 高可用性集群。

接著配置真實(shí)服務(wù)器，這里通過(guò)腳本來(lái)實(shí)現(xiàn)吧(這個(gè)腳本只在WEB機(jī)上執(zhí)行，我現(xiàn)在是用兩臺(tái)機(jī)。服務(wù)器既充當(dāng)lvs、也充當(dāng)web機(jī)

#!/bin/sh

#!/bin/bash

#description : start realserver

VIP=192.168.1.250 ?#zhuji

/etc/rc.d/init.d/functions

case "$1" in

start)

echo " start LVS of REALServer"

/sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.0 up

echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore

echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce

echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore

echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce

;;

stop)

/sbin/ifconfig lo:0 down

echo "close LVS Directorserver"

echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore

echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce

echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore

echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce

;;

*)

echo "Usage: $0 {start|stop}"

exit 1

esac

這個(gè)腳本 基本就是檢測(cè) 是否down 機(jī) 及及時(shí)更換。

實(shí)驗(yàn)部分。后期再續(xù)。。。

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