Re: application based HA

Dmitri Maziuk <[email protected]> Sat, 15 Nov 2014 11:26:45 -0600
Newsgroups gmane.linux.highavailability.user
Message-ID <[email protected]>
On 11/15/2014 10:21 AM, Miles Fidelman wrote:
> Andras POTOCZKY wrote:
...
>> I've found pacemaker is the tool for it but I couldnt find any
>> document or example related to the application level HA.
>>
>> Can somebody point me how can I figure this out?
...
> The short answer: Look for documentation on resource agents.  If your
> application has a pre-existing resource agent defined, then you set that
> up and it handles failover.

The shorter answer: Clusters from Scratch (google it). If your 
application is "stateless", like httpd, there is a chapter on apache. If 
it keeps state, that's typically stored on a drbd filesystem and there's 
a chapter on drbd. That should give you a reasonable starting point.

Dima

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