yum install resource-agents pacemaker

12. 修改heartbeat配置文件(以下步驟需要在2臺node上執行)

復制配置文件,資源文件,認證密鑰文件

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? ? ? ? ? ? #如果其他節點10S內沒有回應，則確認其死亡

warntime 5? ? ? ? ? ? #確認一個節點連接不上5S之后將警告信息寫入日志

initdead 60 ? ? ? ? ? ? #在其他節點死掉之后，系統啟動前需要等待的時間，一般為deadtime的兩倍

udpport 694 ? ? ? ? ?#端口號。

ucast eth0 192.168.135.129(對端IP) ?#對端的IP,在備機上改為192.168.135.130(本機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 當然我說的是yum 安裝 ，也可以去官網?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

可伸縮網絡服務的幾種結構，它們都需要一個前端的負載調度器(或者多個進行主從備份)。我們先分析實現虛擬網絡服務的主要技術，指出IP負載均衡技術是在負載調度器的實現技術中效率最高的。在已有的IP負載均衡技術中，主要有通過網絡地址轉換(Network Address Translation)將一組服務器構成一個高性能的、高可用的虛擬服務器，我們稱之為VS/NAT技術(Virtual Server via Network Address Translation)。在分析VS/NAT的缺點和網絡服務的非對稱性的基礎上，我們提出了通過IP隧道實現虛擬服務器的方法VS/TUN (Virtual Server via IP Tunneling)，和通過直接路由實現虛擬服務器的方法VS/DR(Virtual Server via Direct Routing)，它們可以極大地提高系統的伸縮性。VS/NAT、VS/TUN和VS/DR技術是LVS集群中實現的三種IP負載均衡技術。

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 heartbeat 搭建 LVS 高可用集群。

也可以通過 Keepalived 搭建 LVS 高可用性集群。

接著配置真實服務器，這里通過腳本來實現吧(這個腳本只在WEB機上執行，我現在是用兩臺機。服務器既充當lvs、也充當web機

#!/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

這個腳本 基本就是檢測 是否down 機 及及時更換。

實驗部分。后期再續。。。

總結

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