Ignoring health checks in statistics

[Frank Gruellich]

Hi,

okay, I'll have to see if I can make our load balancer to consider an
HTTP 404 as healthy...  Or could I simple say error 200 "I am OK"?

Can I make this dependent on the health of my backend?  Would something
like this

sub vcl_recv
{
	set req.backend = my_backend;
	if (req.url = "/static.txt")
	{
		if (req.backend.healthy)
		{
			error 200 "I am OK";
		}
		else
		{
			error 404 "I am not OK";
		}
	}
}

work and still not have that counted in statistics?

Kind regards,
 Frank.

On 03/23/10 14:11, Caunter, Stefan wrote:
> Just put this in sub vcl_recv
> 
> else {
>                  error 404 "I am OK";
>      }
> 
> 
> Stefan Caunter :: Senior Systems Administrator :: TOPS
> e: scaunter at topscms.com  ::  m: (416) 561-4871
> www.thestar.com www.topscms.com
> 
> -----Original Message-----
> From: varnish-dev-bounces at varnish-cache.org
> [mailto:varnish-dev-bounces at varnish-cache.org] On Behalf Of Frank
> Gruellich
> Sent: March-23-10 7:03 AM
> To: varnish-dev at varnish-cache.org
> Subject: Ignoring health checks in statistics
> 
> Hi,
> 
> we have two Varnish instances and a load balancer in front.  The load
> balancer periodically polls the varnishd's for a static file (lying also
> at all the backend servers) to check if varnishd is still working.  It
> does that once per second.  This completely messes up statistics like
> hit ratio because that static file is served from cache all the time, so
> currently our hit ratio is close to 99.9%.  I would like to have counted
> this specific file neither as miss nor hit, but just serve it and ignore
> it otherwise.  It doesn't even need to be logged.
> 
> haproxy has an option monitor-net where you can specify that it does not
> need to log requests from that subnet.  Does varnish offer a similar
> option?  Or is there some cool VCL snippet I could add?
> 
> Thanks in advance.
> 
> Kind regards,
> --
> Navteq (DE) GmbH
> Frank Gruellich
> Map24 Systems and Networks
> 
> Duesseldorfer Strasse 40a
> 65760 Eschborn
> Germany
> 
> Phone:      +49 6196 77756-414
> Fax:        +49 6196 77756-100
> 
> HRB 46215, Local Court Frankfurt am Main Managing Directors: Thomas
> Golob, Hans Pieter Gieszen, Martin Robert Stockman
> USt-ID-No.: DE 197947163
> 
> 
> 
> 

Mit freundlichen Gruessen,
Kind regards,
-- 
Navteq (DE) GmbH
Frank Gruellich
Map24 Systems and Networks

Duesseldorfer Strasse 40a
65760 Eschborn
Germany

Phone:      +49 6196 77756-414
Fax:        +49 6196 77756-100

HRB 46215, Local Court Frankfurt am Main
Managing Directors: Thomas Golob, Hans Pieter Gieszen, Martin Robert Stockman
USt-ID-No.: DE 197947163

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