HeartBeat and build HA (High Availability) cluster environment

This example sets 2 systems as cluster servers. The environment of 2 systems are like below.
They have 2 NICs.
(1) www1.server-linux.info[eth0:192.168.0.21] [eth1:10.0.0.21]
(2) www2.server-linux.info[eth0:192.168.0.22] [eth1:10.0.0.22]

The package Heartbeat:-List of RPM files to download . e.g
1) heartbeat-2.1.3-3.el5.centos.i386.rpm
2) heartbeat-pils-2.1.3-3.el5.centos.i386.rpm
3) heartbeat-stonith-2.1.3-3.el5.centos.i386.rpm

[1]	Install HeartBeat first. It's necessary to do this on both systems.

[root@www1 ~]# yum -y install heartbeat

[root@www1 ~]# yum -y install heartbeat
 

# run again becaus of errors

[root@www1 ~]# vi /etc/ha.d/authkey

# create certificates

auth 1
1 crc

[root@www1 ~]# chmod 600 /etc/ha.d/authkeys

 

[2]	Config for a server of (1)

 

[root@www1 ~]# vi /etc/ha.d/ha.cf

crm on

# debug log

debugfile /var/log/ha-debug

# log file

logfile /var/log/ha-log

# the way of output to syslog

logfacility local0

# keepalive

keepalive 2

# deadtime

deadtime 30

# deadping

deadping 40

# warntime

warntime 10

# initdead

initdead 60

# port

udpport 694

# interface and IP address of another Host

ucast eth1 10.0.0.22

# auto failback

auto_failback on|off

# node name (the name of "uname -n")

node www1.server-linux.info
node www2.server-linux.info
respawn root /usr/lib/heartbeat/pingd -m 100 -d 5s -a default_ping_set

 

[3]	Config for a server of (2). The different point is only the section of ucast.

 

[root@www1 ~]# vi /etc/ha.d/ha.cf crm on debugfile /var/log/ha-debug logfile /var/log/ha-log logfacility local0 keepalive 2 deadtime 30 deadping 40 warntime 10 initdead 60 udpport 694 # interface and IP address of another Hostucast eth1 10.0.0.21 auto_failback on node www1.server-linux.info node www2.server-linux.info respawn root /usr/lib/heartbeat/pingd -m 100 -d 5s -a default_ping_set

[4]	Start HeartBeat on both server

 

[root@www1 ~]# /etc/rc.d/init.d/heartbeat start Starting High-Availability services: [  OK  ] [root@www1 ~]# chkconfig heartbeat on

[5] Run crm_mon on both server, then if following result is shown, it's OK, heartbeat running normally. These are Basical configuration of HeartBeat. [root@www1 ~]# crm_mon -i 3 Defaulting to one-shot mode You need to have curses available at compile time to enable console mode ============ Last updated: Sun Jun 15 05:04:34 2008 Current DC: www2.server-linux.info (f8719a77-70b4-4e5f-851b-dafa7d65d3a2) 2 Nodes configured. 0 Resources configured. ============ Node: www2.server-linux.info (f8719a77-70b4-4e5f-851b-dafa7d65d3a2): online Node: www1.server-linux.info (2bbd6408-ec01-4b8c-bb8e-207237af3a99): online