Re: A patch for haproxy 1.3.15.7 (HTTP-ECV)

FinalBSD,

Ace, I was hoping someone would add that feature. Just tested it and it works perfectly.

My tests were:
1) check index.html for value "mytesttext" - result - OK site up - CORRECT (text is present on my page)
2) check index.html for value "not found" - result - site down - CORRECT (text not present on my page)
3) check doesntexist.html for value "not found" - result - site down - CORRECT (even though text is present on apache error page)

Ldirectord / LVS also has a seperate interval time for http health checks (so you can make it longer),
and also the option to do x TCP checks followed by 1 HTTP/grep check (to lower the impact of health checks on the cluster) These are just ideas for improvements but core feature is very useful, thanks again.

2009/2/18 $B6)hDI7(B <finalbsd#gmail.com>
>
> Hi folks,
> I wrote a patch and add two new features for haproxy(1.3.15.7) yesterday .
>
> 1. HTTP-ECV(Extended Content Verification) monitor
>
> add "receive" keyword for HTTP-ECV monitor.
> ECV monitors use specified request uri and receive String settings in an attempt to
> retrieve explicit content from backend nodes. The check is successful when
> the content matches the Receive String value.
> Syntax: option httpchk GET /uri [receive <receive string>] [HTTP/1.0]
> -------------------------------------------------------------------------------------
> backend www
> balance source
> cookie SERVERID insert indirect
> option httpchk GET /http-ecv.php receive "Hello World!" HTTP/1.0
> server www1 192.168.1.2:80 cookie A check port 80 inter 2000 rise 2 fall 2
> -------------------------------------------------------------------------------------
>
> 2. When check the reply of services, only 2xx is OK .
>
> If 2xx and 3xx are OK, assuming the following :
>
> Apache configuration:
> -------------------------------------------------------------------------------------
> ErrorDocument 404 http://www.example.com/404.html
> -------------------------------------------------------------------------------------
> Haproxy Config:
> -------------------------------------------------------------------------------------
> option httpchk GET /check.php HTTP/1.0
> -------------------------------------------------------------------------------------
> So, if the file(check.php,) does not exists on the server(s), the check will be redircted to
> http://www.example.com/404.html and get response code 302, it's still will be OK, but actually it's not.
>
> Pls forgive my poor english and non-skilled C programming ability.
>
> Regards!
> FinalBSD
>
>
>

--
Regards,

Malcolm Turnbull.

Loadbalancer.org Ltd.
Phone: +44 (0)870 443 8779
http://www.loadbalancer.org/