nagio ping script help needed

[garylua at singnet.com.sg]

Hi, thanks for the prompt response. I am running 2 clusters, each at a different site. What i want to accomplish is this : Cluster A is running a a service and I don't want Cluster B to start at bootup if Cluster A is running. I was thinking of using nagios to detect the active cluster at bootup and disable the local cluster. If the local cluster cannot detect the other cluster, then it will startup. if not, it stays inactive.

In order not to simplify things, let's disregard the cluster. Assuming the 2 servers A and B are physically apart, but can ping each other (different subnet). Can i prevent A from starting up if B is already started using Nagios?


--- Thomas Guyot-Sionnest <dermoth at aei.ca> wrote:

> On 13/06/07 01:23 AM, garylua at singnet.com.sg wrote:
> > Hi, I'm currently using Redhat Enterprise Linux 4 and I've
> installed and configured nagios on 1 of my servers. I have a problem
> in coming up with a script for a scenario and I hope somebody here
> can help me.
> > 
> > Assuming I have 2 servers, both running Nagios.Let's call them
> ServerA and ServerB. Both of them are initially configured in such a
> way that when they boot up, 3 redhat cluster services will be
> started : ccsd, cman and rgmanager. 
> > 
> > I need to configure Nagios in such a way that in the situation
> that when ServerA is up and running the 3 services and ServerB boots
> up, the 3 services on ServerB will be disabled at bootup (in other
> words, let ServerB boot up without starting the 3 services). My
> concern is that I do not want more than 1 instance of the services
> being started up.
> > 
> > Can Nagios be configured to accomplish this? I've already
> configure Nagios as a bootup service for Linux already. Thanks in
> advance for any help. 
> 
> I don't get it. Cluster services are usually there for this kind of
> thing: making sure a service runs only once, or that no more than x
> instances are running... But now you want that king of control for
> the
> cluster services itself.. Are you trying to build a cluster of
> clusters???
> 
> I have no experience of RedHat cluster but I did use LinuxHA, and
> you
> would run the cluster software on every nodes no matter if the
> clustered
> services will be running there or no. Maybe your cluster is not
> properly
> configured...
> 
> Thomas
> 

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