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I would like to use heartbeat for HA,the services are apache,mysql,postfix, my concern is if apache on the primary server is down, heartbeat will switch all the services (apache and mysql and postfix) to the standby server right?
Last edited by invincible; 04-21-2012 at 07:41 AM.
Not really, Heartbeat will only failover when the primary server is fail.
As long as you configure the /etc/ha.d/haresource properly, it will take over properly.
For example, you have three daemons to HA. apache application use mysql database.
Your configuration ordered must correct.
1. Floating IP [if needed]
2. mysqld
3. httpd
e.g /etc/ha.d/haresource [heartbeat will read sequential and start the daemon one by one ]
192.168.1.1 mysqld httpd
Not really, Heartbeat will only failover when the primary server is fail.
As long as you configure the /etc/ha.d/haresource properly, it will take over properly.
For example, you have three daemons to HA. apache application use mysql database.
Your configuration ordered must correct.
1. Floating IP [if needed]
2. mysqld
3. httpd
e.g /etc/ha.d/haresource [heartbeat will read sequential and start the daemon one by one ]
192.168.1.1 mysqld httpd
Thank you, I will try. But my concern is, if apache and mysql are using the same VIP, when apache service is stop, heartbeat will switch apache and mysql to the standby server.
if apache using VIP1, mysql using VIP2, maybe they will not affect each other.
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