As far as I know - you've got it - either an event transform or a custom 
script as a command datasource.
--
James Pulver
Information Technology Area Supervisor
LEPP Computer Group
Cornell University



beanfield wrote, On 2/23/2009 5:39 PM:
> We have a two jump boxes that are externally facing...we just use them for 
> ssh access.  I have both servers individually added to zenoss.  I want to 
> setup some advanced alerting so that an email goes out if, and only if, 
> zenoss cannot make an ssh connection to BOTH of them.  
> 
> I was going to set this up similar to a polyserve nfs cluster we have setup, 
> but it won't work properly.  With the polyserve cluster, they have floating 
> ip's.  Zenoss binds the the ip address of the device at the time it's added.  
> Subsequent remodels does not change the ip address on the main device page.  
> So the pinged ip address for the device remains static unless manually 
> changed by the user.  For a cluster with a floating ip address...this is fine 
> because the ip will always float to one of the available servers.  As long as 
> one of the servers is available....I can configure zenoss so that it won't 
> falsely alert that the cluster is down.
> 
> With ssh in this case...I can't really do this.  If our round robin dns entry 
> resolves to server A and it goes down....zenoss will think the cluster is 
> down when server B may be readily available to server ssh sessions. 
> 
> I'm trying to think of ways to only alert when BOTH of these ssh servers are 
> unavailable.  So far, the only thing I can think of is doing some custom 
> scripting in a script on the zenoss box and setting up a command template.  
> The custom script would check to see if at least one of them is 
> available...and if not return a critical alert.  Or perhaps setup a custom 
> transform.  
> 
> However, both of these methods seem like they could be very time consuming 
> and error prone.  Is there an easy way to setup some kind of even correlation 
> to only send an email if all nodes are down for service?
> 
> 
> 
> 
> -------------------- m2f --------------------
> 
> Read this topic online here:
> http://forums.zenoss.com/viewtopic.php?p=31598#31598
> 
> -------------------- m2f --------------------
> 
> 
> 
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