Re: [monit-dev] Add a hostheader option to monit's http check.

[Martin Pala]

On Oct 1, 2009, at 4:12 AM, Brady Catherman wrote:

> On Sep 30, 2009, at 7:02 PM, Jan-Henrik Haukeland wrote:
>
> > On 1. okt. 2009, at 02.58, Brady wrote:
> >
> > >  if failed host localhost port 6000 protocol http and request '/ 
> > > testing' hostheader 'example.com' with timeout 20 seconds for 2  
> > > cycles then restart
> >
> >
> > Just to clarify, this statement which you can write in Monit  
> > already produce the same request as in your patch:
> >
> >  if failed host example.com port 6000 protocol http and request '/ 
> > testing' then restart
>
>
> That works if you have a fairly simple server setup, but if you have  
> 10 hosts sitting behind a CNAME then your suggested approach will  
> not do the right thing. It will connect to one of the 10 hosts, and  
> if it works then it will allow the local host to survive. Even  
> worse, if your service sites behind a globally load balanced pool  
> then draining  traffic away from a location will disable all local  
> protocol checking.
>
> In our case we have several layers of front ends between the  
> resolvable host name, and the software we are monitoring. We monitor  
> the port/IP pair and try to wrap configuration such that monit's  
> requests make it through, but this patch allows us to just fetch the  
> host name we expect without any special cases in our software configs.
>
> - Brady


Hi Brady,

thanks for patch, added to Monit.

Cheers,
Martin