Requirement:
1 ldirectord load balancer - IP: 10.100.1.56
2 HTTPD Server
SERVER01 - IP: 10.100.1.59
SERVER02 - IP: 10.100.1.60
Virtual IP: 10.100.1.58
Linux Distro Used: CentOS 5.5
############Ldirectord setup########################
1. Ldirectord setup - Packages required: heartbeat heartbeat-ldirectord ipvsadm. Repository I used is Epel which as of this writing, heartbeat*-2.1.4. is the available version.
install command: yum install heartbeat heartbeat-ldirectord ipvsadm
2. Create a virtual interface for eth0 for file /etc/sysconfig/network-scripts/ifcfg-eth0:0
#/etc/sysconfig/network-scripts/ifcfg-eth0:0
DEVICE=eth0:0
BOOTPROTO=none
BROADCAST=10.100.255.255
HWADDR=00:14:AA:00:00:1F
IPADDR=10.100.1.58
NETMASK=255.255.0.0
NETWORK=10.100.0.0
ONBOOT=yes
3. Edit /etc/sysctl.conf
# Controls IP packet forwarding
net.ipv4.ip_forward = 1
4. Create /etc/ha.d/ldirectord.cf
#/etc/ha.d/ldirectord.cf
checktimeout=10
checkinterval=2
autoreload=no
logfile="/var/log/ldirectord.log"
quiescent=no
emailalert = "admin@mycompany.com"
virtual=10.100.1.58:80
real=10.100.1.59:80 gate 100
real=10.100.1.60:80 gate 1
service=http
request="check.html"
receive="check_dont_delete_me"
scheduler=wrr
protocol=tcp
checktype=negotiate
#
virtual=10.100.1.58:443
real=10.100.1.59:443 gate 100
real=10.100.1.60:443 gate 1
service=http
request="check.html"
receive="check_dont_delete_me"
scheduler=wrr
protocol=tcp
checktype=connect
#On the checktype for the https config
#I used hecktype=connect since negotiate will not work
#it wont be able to get the certificate.
#For the real server entry the 100 set the prio
# 1 set less priority
##########Real Server Setup#####################
1. Create a virtual loopback interface.
vim /etc/sysconfig/network-scripts/ifcfg-lo:0
DEVICE=lo:0
IPADDR=10.100.1.58
NETMASK=255.255.255.255
ONBOOT=yes
NAME=loopback
2. Edit /etc/sysctl.conf
#Append the ff below:
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
3. issue the command
Ifup eth0:0
sysctl -p
4. create a file check.html at real server
Document Root Dir.
echo “check_dont_delete_me” > /var/www/html/check.html
This should be accessible directly by ldirector for check purpose
5. Do the same on Real Server 2
#########Checking###########
Command to check: ipvsadm -L -n
