Re: [Devil-Linux-discuss] Reverse Proxying with Devil Linux

[Kilponen P. <pek...@ja...>]

Thanks Björn,

My needs are very similar than you have,
one http address (no ssl though) serves external network using
multiple backend servers from internal network like they were
in one server. Reverse proxy and url rewriting.
Different backends for each urlgroup.

However our system is not an enterprise level critical system,
so I would like stick into simpler solutions. Earlier I used pound and I liked
it because it is so simple and nothing more than what I needed.

However if your system is easy to setup and administrated
- high-availability would not hurt.

Regards,

Pekka Kilponen

From: dev...@li... [mailto:dev...@li...] On Behalf Of "Rudner, Björn"
Sent: 24. kesäkuuta 2008 12:26
To: dev...@li...
Subject: Re: [Devil-Linux-discuss] Reverse Proxying with Devil Linux

Hello Pecca,

I'm using reverse-Proxy Loadbalanced with heartbeat and ldirector based on Devil-Linux now since some years.

In the beginning I also tried pound and had some custom build including it.

I never really got lucky with pound since there where some things missing I really needed so I finally got to Apache (using worker MPM, mod_proxy, mod_proxy_balancer, and the Caching (mainly Disk-Caching since Memcaching had some strange errors in the beginning)

I never had tested squid, so I cant tell something about that.

What I needed was:

Have one Domain: www.example.tld with SSL
have multiple Applications accessible from that domain:

https://www.example.tld/App1 goes to an IIS-Backend-Server
https://www.example.tld/App2 goes to an Apache-Backend-Server (Loadbalanced on 4 App-Servers)
https://www.example.tld/App3 goes to an Servlet-Server

and so on ...

If this is kind of what you need I could show you what I have done to get this running solid and fast.

I'm unsing an custom-build DL 1.3.x with 2 Nodes:
shorewall - host-firewall
heartbeat / ldirector - failover + active/passive loadbalancing (routed)
apache (worker) - active/active loadbalancing, session-sticky for both cluster-nodes, SSL-Breakup and proxieing to different Applications and different App-Servers, local disk-Caching.



Mit freundlichen Grüßen/Kind regards,

Björn Rudner
Administrator

phone: +49 (89) 930 839-16
pers. fax.: 01805-456 987-200 16
mobile: +49 (151) 121 623 71
e-mail: br...@ba...
________________________________________
Von: dev...@li... [dev...@li...] im Auftrag von Kilponen Pekka [pek...@ja...]
Gesendet: Dienstag, 24. Juni 2008 09:59
An: dev...@li...
Betreff: [Devil-Linux-discuss] Reverse Proxying with Devil Linux
Hello,

I would like to build a reverse proxy with Devil-Linux. I currently run version 1.2.13.

I tried it with squid:
- Errors with url rewriter proc, they keep crashing. My url rewriter proc is a simple perl script that
works on commandline as planned. From squid result is this :
"FATAL: The url_rewriter helpers are crashing too rapidly, need help!"

Script is simple:

#!/usr/bin/perl -w
$|=1;
use strict;

while (<>) {
  s[^http://test.company.com/]
    [http://internal.company.vpn/];
  print;
}

I cannot figure out why this simple script keeps crashing when it is run by squid but works on
command line.

Next I tried with apache:
- mod_proxy_html is missing, it is needed at least in examples shown in http://www.apachetutor.org/admin/reverseproxies .

Earlier I had a separate computer that had pound http://www.apsis.ch/pound running.
Pound is not included in Devil-Linux. Pound, I think would be the simples and cleanest alternative,
running reverse proxy with squid or apache is like using 1% of their functions.
Pound is simply just what reverse proxy is. (Including load balancer too).

What kind of solutions you have implemented when you do reverse proxy on Devil-Linux?

Best Regards,
Pekka Kilponen



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