Redhat 5 Cluster suite

Frank DiPrete fdiprete at comcast.net
Sat Jul 5 19:42:37 EDT 2008



I like linux-ha + mon. wonderful in it's simplicity and since it just 
runs scripts on events you can make it do anything (like restart rinetd )

and there's watchdog for ftp and http to kick the box if they die.

much more info in the lvs howto also.





Kenny Lussier wrote:
> 
> 
> On Sat, Jul 5, 2008 at 2:23 PM, Bruce Labitt <bruce.labitt at verizon.net 
> <mailto:bruce.labitt at verizon.net>> wrote:
> 
> 
>     Kenny Lussier wrote:
> 
>         Hi All,
> 
>         Sorry if this is a re-post, but I sent it yesterday, and I
>         haven't seen it come through yet....
> 
>         I have been tasked with some clustering work, and I have run
>         into a few snags. Is anyone familiar with the RHEL 5 clustering
>         suite? The situation that I have is that I have a system that
>         needs to be set up as a failover cluster. There are two services
>         running (http and ftp) that are essential services, so if either
>         of them die, the system needs to fail over to the other system.
>         The snag is that I have a third service (rinetd) that isn't
>         important, and I just want to have it re-started if it dies. I
>         can set it up so that rinetd is re-started, but then if the box
>         fails over, rinetd isn't started on the other system. If I tie
>         rinetd to the the IP address resource or to one of the essential
>         resources, then the whole system fails over if rinetd dies (when
>         the cluster manager detects a failure in rinetd, it re-starts
>         the service, but fails over the box anyway).
>         Has anyone dealt with anything similar to this?
> 
>         TIA,
>         Kenny
>         ------------------------------------------------------------------------
> 
> 
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>          
> 
>     Yes, it was a repost.  Did you read this?
> 
>     http://www.redhat.com/docs/manuals/csgfs/browse/4.6/Cluster_Suite_Overview/s1-service-management-overview-CSO.html
> 
>     It sounds like you want high availability.  There is a description
>     of the fail over service in the above link.  I am sorry I have no
>     experience in this.  I was recently looking into clusters for
>     massively parallel computation.
> 
>     Regards,
>     Bruce
> 
> 
> I have read all of the RH docs for the cluster suite and GFS. 
> Unfortunately, they only cover vanilla failover. In my case, I have two 
> services that need to fail over the whole box, and one that just needs 
> to be re-started. We have RH support, but the cluster suite is only 
> covered with the "Advanced Platform" support, and the decision was made 
> that we would get the support for it if it does what we need (except 
> that we can't get it to do what we need without the support....). 
> 
> Oddly, I never got either of the e-mails that I sent to gnhlug-discuss, 
> but I got the replies to it. 
> 
> Thanks,
> Kenny
> 
> 
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