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Posted to users@httpd.apache.org by Chirouze Olivier <ol...@volvo.com> on 2007/02/09 17:08:08 UTC
[users@httpd] Trying to limit connections per virtual host with mod_cband
Hi,
I'm trying to use mod_cband... but can't manage to!
I've tailed down my conf file to the most simple case with just one
virtual host.
What I'm trying to achieve is quite simple: I just want to limit the
number of concurrent connections per virtual host (a "MaxClient" at the
virtualhost level) and I think this is one of the many features of
cband.
How do I test this? Just call multiple times a page that takes very long
to anwser: during all this time, for each click, a connection on this
virtual host stays open on Apache. (thanks a lot to Georgi
Chorbadzhiyski for pointing me to /status?notable that proves the
connections are open on the right virtual host).
The thing is, on cband-status, I see some rps used, but never a single
connection! (thanks to cband status page: /cband-status). "Current
connection" always stays at 0. And, in fact, the limit is never used. I
set it to 2 and can have more than 10 concurrent connections. So, in a
word, it doesn't work as expected.
However, I see some "remote client", but always one. The virtual host is
correct, but "Connections Limit/Current" always says "1/0". I don't
understand how a line can be here with zero connection?
I'm kind of lost after looking around for days and trying all I can
think of (simplifying the config file, unactivating modules, changing
order of LoadModule, using OpenSta, etc...)
I'm using mod_rewrite and mod_proxy and I think that might be the pb.
But there is an example with mod_rewrite on cband homepage so I suppose
there is no incompatibility!
Please... Help ;-)
Olivier
Olivier CHIROUZE
I&0 Infrastructure
The conf file:
------------------------------------------------------------------------
--------------------------------
ServerRoot /data/apache/httpd-test1
# This only contains standard httpd.conf file with the following modules
activated:
#LoadModule access_module modules/mod_access.so
#LoadModule log_config_module modules/mod_log_config.so
#LoadModule logio_module modules/mod_logio.so
#LoadModule env_module modules/mod_env.so
#LoadModule setenvif_module modules/mod_setenvif.so
#LoadModule ssl_module modules/mod_ssl.so
#LoadModule mime_module modules/mod_mime.so
#LoadModule status_module modules/mod_status.so
#LoadModule negotiation_module modules/mod_negotiation.so
#LoadModule dir_module modules/mod_dir.so
#LoadModule alias_module modules/mod_alias.so
Include /data/apache/httpd-test1/appli-apache/conf/httpd_solaris28.conf
ServerName reverse-proxy-test2.iteu.volvo.net
User apache
Group apache
DocumentRoot "/data/apache/httpd-test1/htdocs"
ServerAdmin apache@reverse-proxy-test2.iteu.volvo.net
LoadModule cband_module choucroutemodules/mod_cband.so
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_http_module modules/mod_proxy_http.so
CustomLog /logs/apache/httpd-test1/logs/rproxy_log "%{Host}i |%{RULE}e|
%{%H/%T}t %h -> %{SERVER}e URL: %U"
UseCanonicalName Off
<VirtualHost reverse-proxy-test2.iteu.volvo.net:80>
<Location /status>
SetHandler server-status
Order deny,allow
Allow from all
</Location>
<Location /info>
SetHandler server-info
</Location>
</VirtualHost>
LoadModule rewrite_module modules/mod_rewrite.so
RewriteEngine on
RewriteLog /logs/apache/httpd-test1/logs/rewrite_log
RewriteLogLevel 0
LogLevel debug
Listen reverse-proxy-test2.iteu.volvo.net:80
NameVirtualHost reverse-proxy-test2.iteu.volvo.net:80
<IfModule mod_cband.c>
<Location /cband-status>
SetHandler cband-status
Order deny,allow
Allow from all
</Location>
<Location /cband-status-me>
SetHandler cband-status-me
Order deny,allow
Allow from all
</Location>
</IfModule>
<IfModule mod_cband.c>
CBandSpeed 0 0 10
CBandScoreFlushPeriod 1
CBandRandomPulse On
</IfModule>
<VirtualHost reverse-proxy-test2.iteu.volvo.net:80>
ServerName youpi.volvo.net
<IfModule mod_cband.c>
CBandRemoteSpeed 0 3 1
CBandSpeed 0 0 2
CBandDefaultExceededCode 503
CBandScoreboard /tmp/apache/scoreboard
CBandPeriod 2s
</IfModule>
RewriteEngine on
RewriteLog /logs/apache/httpd-test1/logs/rewrite_log
RewriteLogLevel 3
Include conf/deny_patterns.conf
RewriteRule ^/(.*)$ http://10.213.131.69/waitZoub.php?wait=$1 [P]
ProxyRequests off
KeepAlive Off
</VirtualHost>
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