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2009-06-26 16:54:23



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2009-04-30 17:46:13

实验图：
 

 

环境：
VMWare
CentOS 5.2
Heartbeat- 2.1.4-4.1
heartbeat-ldirectord- 2.1.4-4.1
http
arptables_jf
 
VIP: 10.0.10.60
LD Server1: eth0 10.0.10.209  #ha.server09
                  eth1 172.16.0.3
LD Server2: eth0 10.0.10.208     #ha.server08
                  eth1 172.16.0.2
 
Real Server1: 10.0.10.207
Real Server2: 10.0.10.240
 
ldirectord工作原理：
ldirectord 需要你在真实服务器内启用apache服务器，并在每台真实服务器web服务器的根目录下建立你在配置文件所指定的文件与内容，然后ldirectord 通过循环检查此文件来确定真实服务器是否存活，如果不存活，则自动将其权重设为0，以确保后面客户的连接不会再导向失效的真实服务器，如果真实服务修复上线后，则其又将它的权重设为以使它能够继续为客端连接提供服务。
ldirectord主要是通过调用ipvsadm来创建ipvs虚拟服务器表。
 
LD Server Heartbeat的配置
 
配置文件列表：
/etc/ha.d/authkeys，/etc/ha.d/ha.cf， /etc/ha.d/haresources， /etc/ha.d/ldirectord.cf
 
# cat  /etc/ha.d/authkeys





auth 1
1 crc
# cat /etc/ha.d/ha.cf





logfile         /var/log/ha_log/ha-log.log
logfacility     local0
bcast           eth1
#ucast          eth1 172.16.0.2
keepalive       2
warntime        10
deadtime        30
initdead        120
hopfudge        1
udpport         694
auto_failback   on
node            ha.server09
node            ha.server08
ping            10.0.10.254
respawn hacluster /usr/lib/heartbeat/ipfail
apiauth         ipfail uid=hacluster gid=haclient
debugfile       /var/log/ha_log/ha-debug.log
 
# cat /etc/ha.d/haresources





ha.server09 \
IPaddr2::10.0.10.60/24/eth0/10.0.10.255 \
ldirectord::ldirectord.cf LVSSyncDaemonSwap::master
 
# cat /etc/ha.d/ldirectord.cf





# Global Directives
checktimeout=3
checkinterval=1
#fallback=127.0.0.1:80
autoreload=yes
logfile="/var/log/ha_log/ldirectord.log"
logfile="local0"
quiescent=no
 
# Sample for an http virtual service
virtual=10.0.10.60:80
        real=10.0.10.207:80 gate
        real=10.0.10.240:80 gate
#       real=192.168.6.6:80 gate
        fallback=127.0.0.1:80
        service=http
        request="test.html"
        receive="work"
#       virtualhost=some.domain.com.au
        scheduler=wrr
#       persistent=600
        #netmask=255.255.255.255
        protocol=tcp
        checktype=negotiate
以上将以上的配置文档复制到LD server2的/etc/ha.d目录中，并把cat /etc/ha.d/haresources配置中的ha.server09改为ha.server08。
到此，LD Server配置完成，确保启用net.ipv4.ip_forward：
# vim /etc/sysctl.conf
把net.ipv4.ip_forward=0改为：
net.ipv4.ip_forward=1
保存退出，使其马上生效：
# sysctl -p
 
启动heartbeat服务：
# service heartbeat start
 

Real Server 配置
Real Server 需要安装arptables_jf。
在RealServer1和RealServer2中直接运行如下脚本：
# cat /root/lvs-rs.sh




#!/bin/bash
#
 
echo -n "Input Virtaul IP:"
read VIP
echo -n "Input Real IP:"   # 输入本机IP地址
read RIP
/etc/init.d/arptables_jf stop
/sbin/arptables -A IN -d $VIP -j DROP
/sbin/arptables -A OUT -s $VIP -j mangle --mangle-ip-s $RIP
service arptables_jf save
 
cat >>/etc/sysconfig/network-scripts/ifcfg-lo:0<<EOF
DEVICE=lo:0
IPADDR=$VIP
NETMASK="255.255.255.255"
ONBOOT=yes
NAME=loopback
 
EOF
 
/sbin/ifup lo


 
 
或者使用startup脚本来完成RealServer的配置，如下是RealServer1的startup脚本：
# cat /etc/init.d/lvsRS
 




#!/bin/sh
# decription:start realserver
# chkconfig 235 26 26
 
#echo -n "Input Local Real IP:"
#_RIPADD
 
#echo -n "Input The Vitaul IP(VIP):"
#_VIP
 
VIP=10.0.10.60
#VIP2=10.0.10.61
RIP1=10.0.10.207
RIP2=10.0.10.208
RIP3=10.0.10.210
RIP4=10.0.10.240
#RIP3=10.0.10.x
 
GW=10.0.10.254
 
SER_PORT=80
SMTP_PORT=25
HTTP_CON_INTERFACE=lo:6721
SMTP_CON_INTERFACE=lo:6725
ATTEM=wrr
 
. /etc/rc.d/init.d/functions
 
case "$1" in
        start)
        echo " start LVS of REALServer"
        /sbin/ifconfig $HTTP_CON_INTERFACE $VIP broadcast $VIP netmask 255.255.255.255 up
        /sbin/route add -host $VIP dev $HTTP_CON_INTERFACE
        echo "0" > /proc/sys/net/ipv4/ip_forward
        /etc/init.d/arptables_jf stop
        /sbin/arptables -A IN -d $VIP -j DROP
        /sbin/arptables -A OUT -s $VIP -j mangle --mangle-ip-s $RIP1
        /etc/init.d/arptables_jf save
#       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 $HTTP_CON_INTERFACE down
        echo " stop LVS service"
        /sbin/arptables -D IN -d $VIP -j DROP
        /sbin/arptables -D OUT -s $VIP -j mangle --mangle-ip-s $RIP1
#       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
 RealServer2的startup脚本：[/img]..



2009-04-30 09:32:48
实验结构图：
 

系统环境：
VMWare ESXi
CentOS 5.2
Apache
qmail
LVS 实现方式: DR

DR是指Direct Routing，它的转发流程是：Director机器收到外界请求，按相应的调度算法将其直接发送到相应Real Server，Real Server处理完该请求后，将结果数据包直接返回给客户，完成一次负载调度。
需要的软件包：ipvsadm-1.24-8.1
网络配置：
LD Server eth0 10.0.10.209
Real Server1 eth0 10.0.10.207
Real Server2 eth0 10.0.10.208
Real Server3 eth0 10.0.10.210
Real Server4 eth0 10.0.10.240
VIP 10.0.10.60
VIP2 10.0.10.61
 
用户请求http连接是指向10.0.10.60，LD Server通过权重轮询（wrr）调度，将http请求转发到Real Server群中。
LVS的配置是通过前面所安装的IP虚拟服务器软件ipvsadm来实现的。ipvsadm与LVS的关系类似于iptables和NetFilter的关系，前者只是一个建立和修改规则的工具，这些命令的作用在系统重新启动后就消失了，所以应该将这些命令写到一个脚本里，然后让它在系统启动后自动执行。
 
LD Server 启动脚本：/etc/init.d/lvsDR

#!/bin/sh
#
# description: start LVS of Director Server    
# created in 2009-04-29 by Dika.Ye

VIP=10.0.10.60
VIP2=10.0.10.61
RIP1=10.0.10.207
RIP2=10.0.10.208
RIP3=10.0.10.210
RIP4=10.0.10.240
#RIP3=10.0.10.x

GW=10.0.10.254

SER_PORT=80
SMTP_PORT=25
HTTP_CON_INTERFACE=eth0:6721
SMTP_CON_INTERFACE=eth0:6725
ATTEM=wrr

# Source function library.
. /etc/rc.d/init.d/functions

case $1 in
        start)
                echo -n "Starting LVS of Director Server "    
                #Set the Virtual IP Address    
                /sbin/ifconfig $HTTP_CON_INTERFACE $VIP broadcast $VIP netmask 255.255.255.255 up
                /sbin/ifconfig $SMTP_CON_INTERFACE $VIP2 broadcast $VIP2 netmask 255.255.255.255 up
                /sbin/route add -host $VIP dev $HTTP_CON_INTERFACE
                /sbin/route add -host $VIP2 dev $SMTP_CON_INTERFACE
                #Clear IPVS Table    
                /sbin/ipvsadm -C
                #Set Lvs for http
                /sbin/ipvsadm -A -t $VIP:$SER_PORT -s $ATTEM
                /sbin/ipvsadm -a -t $VIP:$SER_PORT -r $RIP1:$SER_PORT -g
                #Set LVS for smtp
                /sbin/ipvsadm -A -t $VIP2:$SMTP_PORT -s $ATTEM
                /sbin/ipvsadm -a -t $VIP2:$SMTP_PORT -r $RIP3:$SMTP_PORT -g
                /sbin/ipvsadm -a -t $VIP2:$SMTP_PORT -r $RIP4:$SMTP_PORT -g
                #Run Lvs    
                /sbin/ipvsadm
                echo "."
                ;;
        stop)
                echo -n "Close LVS Director Server "    
                /sbin/ifconfig $HTTP_CON_INTERFACE down
                /sbin/ifconfig $SMTP_CON_INTERFACE down
                /sbin/ipvsadm -C
                echo "."
                ;;
        status)
                echo "IPVSADM list"
                ipvsadm -Ln
                ;;
        *)
                echo "Usage: $0" {start|stop}    
                exit 1
esac
 
Real Server启动脚本：/etc/init.d/lvsRS
HTTP Real Server
 

#!/bin/sh
# decription:start realserver    
# chkconfig 235 26 26    

VIP=10.0.10.60
VIP2=10.0.10.61
RIP1=10.0.10.207
RIP2=10.0.10.208
RIP3=10.0.10.210
RIP4=10.0.10.240
#RIP3=10.0.10.x

GW=10.0.10.254

SER_PORT=80
SMTP_PORT=25
HTTP_CON_INTERFACE=lo:6721
SMTP_CON_INTERFACE=lo:6725
ATTEM=wrr

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

case "$1" in
                start)
                echo " start LVS of REALServer"    
                /sbin/ifconfig $HTTP_CON_INTERFACE $VIP broadcast $VIP netmask 255.255.255.255 up
                /sbin/route add -host $VIP dev $HTTP_CON_INTERFACE
                echo "0" > /proc/sys/net/ipv4/ip_forward
                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 $HTTP_CON_INTERFACE down
                echo " stop LVS service"    
                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
 
Real Server启动脚本：/etc/init.d/lvsRS
SMTP Real Server
 

#!/bin/sh
# decription:start realserver    
# chkconfig 235 26 26    

VIP=10.0.10.60
VIP2=10.0.10.61
RIP1=10.0.10.207
RIP2=10.0.10.208
RIP3=10.0.10.210
RIP4=10.0.10.240
#RIP3=10.0.10.x

GW=10.0.10.254

SER_PORT=80
SMTP_PORT=25
HTTP_CON_INTERFACE=lo:6721
SMTP_CON_INTERFACE=lo:6725
ATTEM=wrr

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

case "$1" in
                start)
                echo " start LVS of REALServer"    
                /sbin/ifconfig $SMTP_CON_INTERFACE $VIP2 broadcast $VIP2 netmask 255.255.255.255 up
                /sbin/route add -host $VIP2 dev $SMTP_CON_INTERFACE
                echo "0" > /proc/sys/net/ipv4/ip_forward
                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 $SMTP_CON_INTERFACE down
                echo " stop LVS service"    
                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
 
 
启动服务：
 
LD Server
 
# service lvsDR start
 
Real Server
 
# service lvsRS start
 
 [/img]..



2009-04-03 09:51:36



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2009-02-13 11:29:18



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