Apache 2.4 With Mod_QOS

Just a basic info about qos.

Create policy based on number of request or on bandwidth and lot more.
Event request controlling Mechanism
Mitigate DDoS attacks.

Current working enviornment is OpenSuSE 13.1 with Apache 2.4

Install Apache

Terminal

zypper install apache2 apache2-worker

Download latest mod_qos from this location

Terminal

tar xvf mod_qos-11.4.tar.gz
cd mod_qos-11.4
cd mod_qos-11.4/apache2 && /usr/sbin/apxs2 -I /usr/include/apache2-worker/ -ci mod_qos.c"
/usr/lib64/apr-1/build/libtool --silent --mode=compile gcc -std=gnu99 -prefer-pic -fmessage-length=0 -grecord-gcc-switches -fstack-protector -O2 -Wall -D_FORTIFY_SOURCE=2 -funwind-tables -fasynchronous-unwind-tables -g -fPIC -Wall -DLDAP_DEPRECATED  -DLINUX -D_REENTRANT -D_GNU_SOURCE -pthread -I/usr/include/apache2  -I/usr/include/apr-1   -I/usr/include/apr-1 -I/usr/include -I/usr/include/apache2-worker/  -c -o mod_qos.lo mod_qos.c && touch mod_qos.slo
/usr/lib64/apr-1/build/libtool --silent --mode=link gcc -std=gnu99    -o mod_qos.la  -rpath /usr/lib64/apache2 -module -avoid-version    mod_qos.lo
/usr/share/apache2/build/instdso.sh SH_LIBTOOL='/usr/lib64/apr-1/build/libtool' mod_qos.la /usr/lib64/apache2
/usr/lib64/apr-1/build/libtool --mode=install install mod_qos.la /usr/lib64/apache2/
libtool: install: install .libs/mod_qos.so /usr/lib64/apache2/mod_qos.so
libtool: install: install .libs/mod_qos.lai /usr/lib64/apache2/mod_qos.la
libtool: finish: PATH="/sbin:/usr/sbin:/usr/local/sbin:/root/bin:/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/usr/games:/opt/bin:/sbin" ldconfig -n /usr/lib64/apache2
----------------------------------------------------------------------
Libraries have been installed in:
   /usr/lib64/apache2

If you ever happen to want to link against installed libraries
in a given directory, LIBDIR, you must either use libtool, and
specify the full pathname of the library, or use the `-LLIBDIR'
flag during linking and do at least one of the following:
   - add LIBDIR to the `LD_LIBRARY_PATH' environment variable
     during execution
   - add LIBDIR to the `LD_RUN_PATH' environment variable
     during linking
   - use the `-Wl,-rpath -Wl,LIBDIR' linker flag
   - have your system administrator add LIBDIR to `/etc/ld.so.conf'

See any operating system documentation about shared libraries for
more information, such as the ld(1) and ld.so(8) manual pages.
----------------------------------------------------------------------
chmod 755 /usr/lib64/apache2/mod_qos.so

If you see the Output like this that means mod_qos is installed and you just have to load it in apache.

We will add a line in this file /etc/apache2/sysconfig.d/loadmodule.conf

Terminal

LoadModule qos_module                     /usr/lib64/apache2/mod_qos.so

You can load mod_qos for all the virtualhost or to any specific virtualhost. I’m adding to a specific one.

Terminal

<VirtualHost *:80>
    ServerName        www.example.com
    DocumentRoot      /web/example.com/
    ServerAdmin       webmaster@example.com
    ErrorLog          /var/log/apache2/example.com-error_log
    TransferLog       /var/log/apache2/example.com-access_log
    ServerSignature   Off
    HostnameLookups   Off
    Options           -Indexes -FollowSymLinks
    #-------------------------
    <Directory "/web/example.com">
        Allow        from all
    </Directory>
    <IfModule mod_qos.c>
        <Location /qos>
           SetHandler qos-viewer
        </Location>
    </IfModule>
</VirtualHost>

You can check the status of mod_qos on this link. NOTE change the domainname.

http://domain.name.com/qos?option=ip&action=enable&refresh=

Ashish Jaiswal Blog

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