[hobbit] DNS reboot causes purples

[Bill Perez]

Which tests are going purple ? The network tests (conn, smtp, http etc.)
or the client-side tests (cpu, disk, memory ...) ?

Henrik - It is the network test (conn) that went purple for several
switches, router, windows servers, a unix server - there was really no
consistency in what went purple.  I was thinking of using the dns=ip switch
for bbtest-net to resolve this - do you think that is a viable solution or
would I be better off looking into setting up a caching DNS server on the
Hobbit server?

Thank you


On 1/12/06, Henrik Stoerner <henrik at hswn.dk> wrote:
>
> On Tue, Jan 10, 2006 at 10:58:10AM -0500, Bill Perez wrote:
> >
> > I'm hoping someone might be able to help me.  I'm running Hobbit 4.1.2on a
> > Fedora Core 4, monitoring approximately 500 servers.  I have been
> running
> > Hobbit for a few months and a few times our DNS server has been rebooted
> for
> > patching.  When this happens it causes some servers to go purple and the
> > only way I've been able to fix this is to restart the Hobbit service but
> it
> > has generated a ton of alerts and not a lot of happy alert
> recipients.  My
> > /etc/resolv.conf file has primary and secondary DNS servers, so I would
> have
> > thought if one wasn't available it would use the other, but this doesn't
> > seem to be the case.
>
> Which tests are going purple ? The network tests (conn, smtp, http etc.)
> or the client-side tests (cpu, disk, memory ...) ?
>
> If it's the network tests, then the problem is probably that Hobbit is
> timing out the DNS requests because it takes too long to do the DNS
> lookups. It probably sends the query first to the server which is down,
> and then times out waiting for the response. But that would normally
> cause your network tests to go red - with a DNS error status - not
> purple. But setting up a caching DNS server on the Hobbit server might
> help with that (and is generally a good idea when testing many servers).
>
> So I think it's your client-side tests that go purple. Which doesn't
> really make sense, since the only communication between the clients and
> Hobbit normally use the IP address directly. But you should check the
> BBDISP setting in your clients' etc/hobbitclient.cfg and make sure it is
> set to the IP of your Hobbit server, not the hostname.
>
>
> Regards,
> Henrik
>
>
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>
>
>
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