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For the sample configuration we will have two nodes called ha01 and ha02, and we will service an IP address, that we will call the Virtual IP address (VIP), on anactive / passive configuration. Both nodes will need to have name resolution configured either through DNS or the /etc/hosts file.

Installing Pacemaker-Heartbeat

First of all, we need to add the repositories to be able to install heartbeat. We add the following to /etc/apt/sources.list

deb http://ppa.launchpad.net/ubuntu-ha/ppa/ubuntu karmic maindeb-src http://ppa.launchpad.net/ubuntu-ha/ppa/ubuntu karmic main

Then, we issue the following:

sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com B64F0AFA

Now, we can install pacemaker-heartbeat:

sudo apt-get update && sudo apt-get install pacemaker-heartbeat

Configuring

Pacemaker-Heartbeat needs 3 main configuration files. These are /etc/ha.d/authkeys, /etc/ha.d/ha.cf, and /var/lib/heartbeat/crm/cib.xml. There is a fourth configuration file, /etc/logd.cf, which contains the log settings.

• On the first host, edit /etc/ha.d/authekys. This file is the same in all Pacemaker-Heartbeat style configurations. It stores the authentication information that will be used in the cluster nodes.

auth 11 md5 DesiredPassword

• Then, change permissions of the file:

sudo chmod 600 /etc/ha.d/authkeys

• Then, we need to create the file which has the logging configurations (/etc/logd.cf):

logfile /var/log/ha-log

or do as root

sed -e 's/#logfile*/logfile/' /usr/share/doc/heartbeat/logd.cf > /etc/logd.cf

• Then, edit /etc/ha.d/ha.cf with the following:

use_logd onudpport 694keepalive 2warntime 15deadtime 30initdead 30mcast eth0 239.0.0.43 694 1 0node ha01 ha02crm respawn

• To finish, copy all configuration files to the second node:

scp /etc/ha.d/authkeys ha02:~scp /etc/ha.d/ha.cf ha02:~scp /etc/logd.cf ha02:~

• And move then to the corresponding directories in the second node.

sudo mv authkeys /etc/ha.d/sudo mv ha.cf /etc/ha.d/sudo mv logd.cf /etc/

• Then, start Heartbeat and wait for it to make intra cluster communication so that we can add the service to the cluster resources manager.

sudo /etc/init.d/heartbeat start

• Once it has made intra cluster configuration, specify some global options for the cluster resource manager:

crm_attribute --attr-name symmetric-cluster --attr-value truecrm_attribute --attr-name default-resource-stickiness --attr-value INFINITYcrm_attribute --attr-name stonith-enabled --attr-value false

• Then, edit the following file /tmp/resources.xml, which configuration parameters for the resource:

• After creating above file, you need to tell Heartbeat to add it to the cluster configuration.

cibadmin -o resources -C -x /tmp/resources.xml

• Finally, we need to edit the following file again, /tmp/resources.xml, which will specify the constraints, that will tell the Cluster Resource Manager how it should failover the services.

After editing above file, you need to tell Heartbeat to add it to the cluster configuration.

cibadmin -o constraints -C -x /tmp/resources.xml

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