LVS部署(转载)

转自：http://blog.chinaunix.net/space.php?uid=22600159&do=blog&id=2124185

LVS with DR mode 

1、Servers environment

System: CentOS 5.2

lvs-m : 192.168.1.221lvs-s : 192.168.1.222web-1 : 192.168.1.2web-2 : 192.168.1.3VIP : 192.168.1.220

2、Install related softwares

lvs-m# yum install ipvsadmlvs-m# yum install heartbeat-ldirectordlvs-m# yum install heartbeat

• The above operations also need implement on lvs-s.

3、Configure LVS

lvs-m# cd /etc/ha.dlvs-m# cp /usr/share/doc/heartbeat-2.1.3/ha.cf .lvs-m# cp /usr/share/doc/heartbeat-2.1.3/authkeys .lvs-m# cp /usr/share/doc/heartbeat-2.1.3/haresources .lvs-m# cp /usr/share/doc/heartbeat-ldirectord-2.1.3/ldirectord.cf .

• The above operations also need implement on lvs-s.

4、Configure HA

lvs-m# vi ha.cfmodfiy:#logfile        /var/log/ha-log#keepalive 2#deadtime 30#warntime 10#initdead 120#udpport        694#bcast   eth0            # Linuxucast eth0 192.168.1.2#node    ken3#node    kathy#ping 10.10.10.254to:logfile        /var/log/ha-logkeepalive 2deadtime 30warntime 10initdead 120udpport        694bcast   eth0            # Linuxucast eth0 192.168.1.222    //lvs-s's IPnode    lvs-m           # the node name must same as the output of "uname -n"node    lvs-s           # the node name must same as the output of "uname -n"ping 192.168.1.222    //lvs-s's IP

• The above operations also need implement on lvs-s.
• Attention the ip address.

5、Configure auth mode

lvs-m# vi authkeysmodfiy:#auth 1#1 crcto:auth 11 crc

lvs-m# chomd 600 autkeys

• The above operations also need implement on lvs-s.

6、Configure virtual Service

lvs-m# vi haresourcesRemovin all then add following line:

lvs-m IPaddr::192.168.1.220/32/eth0:0   ldirectord     //here, node lvs-m works as master

• the lvs-s server as follows:

lvs-m IPaddr::192.168.1.220/32/eth0:0   ldirectord     //here, node lvs-m works as master

If we configure them work as master/master mode, and the vip on lvs-s is 192.168.1.230, the configuration in both haresources files as follows:lvs-m IPaddr::192.168.1.220/32/eth0:0   ldirectordlvs-s IPaddr::192.168.1.230/32/eth0:0   ldirectord

Add following lines to /etc/sysctl.conf

net.ipv4.conf.lo.arp_ignore = 0net.ipv4.conf.lo.arp_announce = 0net.ipv4.conf.eth0.arp_ignore = 0net.ipv4.conf.eth0.arp_announce = 0and change "net.ipv4.ip_forward = 0" to "net.ipv4.ip_forward = 1"

lvs-m# sysctl -p

• The above operations also need implement on lvs-s.

• On Web server

web-n# vi /root/vip.shAdd:################################################################################# Virtual IP Setup################################################################################ifconfig lo:0 192.168.1.220 broadcast 192.168.1.220 netmask 255.255.255.255 uproute add -host 192.168.1.220 dev lo:0################################################################################# The end################################################################################

web-n# chmod a+x /root/vip.shweb-n# echo "/root/vip.sh" >> /etc/rc.local

And add the following lines to /etc/sysctl.conf on web server

net.ipv4.conf.lo.arp_ignore = 0net.ipv4.conf.lo.arp_announce = 0

web-n# sysctl -p

7、Configure hosts

lvs-m# vi /etc/hosts192.168.1.221   lvs-m192.168.1.222   lvs-s

• The above operations also need implement on lvs-s.

8、Configure ldirectord

lvs-m# vi ldirectord.cf

Add:

checktimeout=3checkinterval=1autoreload=yesquiescent=novirtual=192.168.1.220:80   real=192.168.1.2:80 gate 1 ".healthcheck.html", "OKAY"   real=192.168.1.3:80 gate 1 ".healthcheck.html", "OKAY"   fallback=127.0.0.1:80 gate 1 ".healthcheck.html", "OKAY"   service=http   request=".healthcheck.html"   receive="Test Page"   scheduler=rr   protocol=tcp   persistent = 600

• The above operations also need implement on lvs-s.

Create healthcheck page in web server

web-n# echo "OKAY" > /var/www/html/.healthcheck.html

9、Start heartbeat

lvs-m# chkconfig heartbeat onlvs-m# service heartbeat start

lvs-s# chkconfig heartbeat onlvs-s# service heartbeat start

10、Check ipvsadm status

lvs-m# watch ipvsadm -L -n

LVS with NAT mode

 

1、Servers environment

lvs-m : eth0:192.168.1.221        eth1:172.16.1.1lvs-s : eth0:192.168.1.222        eht1:172.16.1.254web-1 : eth0:172.16.1.2   //gw:172.16.1.1web-2 : eth0:172.16.1.3   //gw:172.16.1.1VIP : 192.168.1.220

2、Install related softwares

lvs-m# yum install ipvsadmlvs-m# yum install heartbeat-ldirectordlvs-m# yum install heartbeat

• The above operations also need implement on lvs-s.

3、Configure LVS

lvs-m# cd /etc/ha.dlvs-m# cp /usr/share/doc/heartbeat-2.1.3/ha.cf .lvs-m# cp /usr/share/doc/heartbeat-2.1.3/authkeys .lvs-m# cp /usr/share/doc/heartbeat-2.1.3/haresources .lvs-m# cp /usr/share/doc/heartbeat-ldirectord-2.1.3/ldirectord.cf .

• The above operations also need implement on lvs-s.

4、Configure HA

lvs-m# vi ha.cfmodfiy:#logfile        /var/log/ha-log#keepalive 2#deadtime 30#warntime 10#initdead 120#udpport        694#bcast   eth0            # Linuxucast eth0 192.168.1.2#node    ken3#node    kathy#ping 10.10.10.254to:logfile        /var/log/ha-logkeepalive 2deadtime 30warntime 10initdead 120udpport        694bcast   eth0            # Linuxucast eth0 192.168.1.222    //lvs-s's IPnode    lvs-m           # uname -nnode    lvs-s           # uname -nping 192.168.1.222    //lvs-s's IP

• The above operations also need implement on lvs-s.
• Attention the ip address.

5、Configure auth mode

lvs-m# vi authkeysmodfiy:#auth 1#1 crcto:auth 11 crc

lvs-m# chomd 600 autkeys

• The above operations also need implement on lvs-s.

6、Configure virtual Service

lvs-m# vi haresourcesAdd:lvs-m IPaddr::192.168.1.220/32/eth0:0   ldirectord     //lvs-m server

• the lvs-s server as follows:

lvs-m IPaddr::192.168.1.220/32/eth0:0   ldirectord

Add following lines to /etc/sysctl.conf

net.ipv4.conf.lo.arp_ignore = 0net.ipv4.conf.lo.arp_announce = 0net.ipv4.conf.eth0.arp_ignore = 0net.ipv4.conf.eth0.arp_announce = 0and change "net.ipv4.ip_forward = 0" to "net.ipv4.ip_forward = 1"

• The above operations also need implement on lvs-s.

7、Configure hosts

lvs-m# vi /etc/hosts192.168.1.221   lvs-m192.168.1.222   lvs-s

• The above operations also need implement on lvs-s.

8、Configure ldirectord

lvs-m# vi ldirectord.cf

Add:

checktimeout=3checkinterval=1autoreload=yesquiescent=novirtual=192.168.1.220:80   real=172.16.1.2:80 gate 1 ".healthcheck.html", "OKAY"   real=172.16.1.3:80 gate 1 ".healthcheck.html", "OKAY"   fallback=127.0.0.1:80 gate 1 ".healthcheck.html", "OKAY"   service=http   request=".healthcheck.html"   receive="Test Page"   scheduler=rr   protocol=tcp   persistent = 600

• The above operations also need implement on lvs-s.

Create healthcheck page in web server

web-n# echo "OKAY" > /var/www/html/.healthcheck.html

9、Start heartbeat

lvs-m# chkconfig heartbeat onlvs-m# service heartbeat start

lvs-s# chkconfig heartbeat onlvs-s# service heartbeat start

10、Check ipvsadm status

lvs-m# watch ipvsadm -L -n

Some useful notes

• LVS forwarding:

gate -g Route LVS-DR

ipip -i Tunnel LVS-TUN

masq -m Masq LVS-NAT

• Check the healthcheck page

web-n# lynx -dump 127.0.0.1/.healthcheck.html