[HOWTO] Load Balancing with ldirectord

[ Miroslav Strugarevic @ 07.07.2008. 14:42 ] @

Load Balancing Router Howto

- Podešavanje LVS Routera

Potrebno je instalirati sledeće pakete:

# yum install heartbeat heartbeat-ldirectord

Virtuelna IP adresa se podešava na: /etc/sysconfig/network-scripts/ifcfg-eth0:0

Code:

DEVICE=eth0:0
BOOTPROTO=static
IPADDR=192.168.73.100
NETMASK=255.255.255.0
NETWORK=192.168.73.0
BROADCAST=192.168.73.255
ONBOOT=yes

Nakon toga je potrebno aktivirati novi mrežni alias:

# ifup eth0:0

Konfiguracioni fajl za ldirectord se nalazi na: /etc/ha.d/ldirectord.cf

Sadržaj /etc/ha.d/ldirectord.cf:

Code:

checktimeout=10
checkinterval=2
autoreload=yes
logfile="/var/log/ldirectord.log"
quiescent=yes

virtual=192.168.73.100:80
        real=192.168.73.12:80 gate 10
        real=192.168.73.13:80 gate 10
        real=192.168.73.14:80 gate 10
        service=http
        request="test.html"
        receive="OK"
        scheduler=rr
        protocol=tcp
        checktype=negotiate

Dodati u /etc/sysctl.conf sledeću stavku:

Code:
net.ipv4.ip_forward = 1

Nakon toga pokrenuti komandu:

# sysctl -p

Pokretanje ldirectord servisa:

# service ldirectord start

Provera stanja LVS rutera:

# ipvsadm -L -n

Potrebno je dodati ldirectord u startup:

# chkconfig ldirectord on

- Podešavanje Web Servera

Sledeće korake treba odraditi na sva tri web servera!!!

Instalirajte httpd server:

# yum install httpd

Nakon toga pokrenite httpd servis:

# service httpd start
# chkconfig httpd on

Virtuelna IP adresa se podešava na: /etc/sysconfig/network-scripts/ifcfg-lo:0

Code:

DEVICE=lo:0
IPADDR=192.168.73.xx
NETMASK=255.255.255.255
NETWORK=192.168.73.0
BROADCAST=192.168.73.255
ONBOOT=yes
NAME=loopback

Nakon toga je potrebno aktivirati novi mrežni alias:

# ifup lo:0

Dodati u /etc/sysctl.conf sledeće stavke:

Code:
#net.ipv4.ip_forward = 0
net.ipv4.conf.all.arp_ignore=1
net.ipv4.conf.eth0.arp_ignore=1
net.ipv4.conf.all.arp_announce=2
net.ipv4.conf.eth0.arp_announce=2

Nakon toga pokrenuti komandu:

# sysctl -p

Dodati u DocumentRoot fajl /var/www/html/test.html koji sadrzi sledece: OK

# touch /var/www/html/test.html
# echo "OK" >> /var/www/html/test.html
# cat /var/www/html/test.html

Kada to završite probajte da pristupite web serveru preko adrese 192.168.73.100.
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