[hobbit] Which DNS query is causing delays

[Milan Kocian]

On Fri, Oct 09, 2009 at 02:37:36PM +0000, Henrik Størner wrote:
> In <20091009141045.GA8490 at ntm.vs.lam.cz> Milan Kocian <milon at wq.cz> writes:
> 
> >when we are talking about, I have one question in this area (DNS).
> >I don't understand why http tests resolve hostnames when you explicitly
> >define ip address in test. Is this intention to make dns test together ?
> >(I have small patch to disable it :-).
> 
> It's because webservers often use the hostname-part of the URL to
> determine how to process the request. E.g. if you have 10 sites
> hosted on the same physical box (= same IP), then you must specify
> the "hostname" in the URL to hit the right virtual webserver.
> 

Many thanks for answer. Yes, I understand this behaviour.

> That's why you can override the DNS lookup:
> 
>    10.0.0.1  www.foo.com  # http://abc.foo.com=192.168.1.2/
> 

But my question is: Why is done dns query in your case ?
IMHO when I specify ip address explicitly (via =), I don't
need dns query in bbtest-net.

> 
> Regards,
> Henrik
> 
> 

May be my patch helps to understand what I mean :

--- xymon-4.2.3/bbnet/bbtest-net.c	2009-02-09 10:28:57.000000000 +0100
+++ xymon-sources-4.2.3/bbnet/bbtest-net.c	2009-09-10 17:05:25.000000000 +0200
@@ -540,7 +540,8 @@
 					}
 					else {
 						s = httptest;
-						add_url_to_dns_queue(testspec);
+						if (!url.desturl->ip)
+							add_url_to_dns_queue(testspec);
 					}
 				}
 				else if (argnmatch(testspec, "apache") || argnmatch(testspec, "apache=")) {



Regard,

-- 
Milan Kocian