[hobbit] Interesting question

[Jerald Sheets]

I think I figured out a way to make this happen.

The command I need to run won't even return data on a machine that is not
the primary server.  So I will do two things.  IF the server is not primary
AND the command doesn't run, send a "clear" status back to the server.  IF
they do work, go to the main test routine and send whatever color reflects
the status.

Running this on both hosts will keep things from going purple, and will get
me the stats I need.

Once I get it functional, I may need to chat with you guys regarding setting
up an NCV.  I have tried the examples several times with no joy.  But,
enough of that for now.  I have a new-year's celebration to get ready for.

Happy New Years, Hobbits!


---
Jerald M. Sheets jr.


On Wed, Dec 30, 2009 at 11:56 AM, Patrick Nixon <pnixon at gmail.com> wrote:

> I did something recently that checks the status of the conn column for
> a host before running a custom script.
>
> I accomplished it using hobbitdboard
>
>  BBJUNK=`bb localhost "hobbitdboard host=${BBHOST} test=ssh fields=color"`
>  if [[ "$BBJUNK" =~ "green" ]]; then
>    debugmsg Launching - $BBIP $BBHOST $SSHPRIV $BBJUNK;
>    nohup /usr/lib/hobbit/server/ext/pd2a.sh $BBIP $BBHOST $SSHPRIV &
>  elif [[ "$BBJUNK" == "" ]]; then
>    debugmsg Launching - $BBIP $BBHOST $SSHPRIV $BBJUNK;
>    nohup /usr/lib/hobbit/server/ext/pd2a.sh $BBIP $BBHOST $SSHPRIV &
>  else
>    outputmsg ssh down - $BBJUNK
>  fi
>
>
> Maybe that's something you can adapt for your test?
>
> On Wed, Dec 30, 2009 at 11:34 AM, Jerald Sheets <questy at gmail.com> wrote:
> > I'm about to undertake writing a series of monitors for a custom app we
> have
> > here in-house.
> >
> > This app lives over a networked filesystem (think cvfs or gpfs) that is
> > managed by two master nodes, a master and a failover.  As a result, only
> one
> > node at a time can answer the query I want to give it.
> >
> > My conundrum:
> >
> > If I make the query form my Xymon server on node1 and it fails over to
> > node2, node1 becomes completely unable to answer the question, and that
> > check would go "red".  Same for node2 back to node1.
> >
> > If I run the check locally on each system, while one is working, the
> other
> > will go "blue".
> >
> > Have any of you ever written monitors for servers that carry a service in
> an
> > active/passive configuration, and been able to keep the individual
> servers
> > from going into some strange state as a result of failovers and such?
> >
> > How did you handle it?
> >
> >
> >
> > ---
> > Jerald M. Sheets jr.
> >
>
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>
>
>
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