{"id":195,"date":"2010-01-20T13:13:53","date_gmt":"2010-01-20T06:13:53","guid":{"rendered":"http:\/\/www.jfdesignnet.com\/?p=195"},"modified":"2010-01-20T13:13:53","modified_gmt":"2010-01-20T06:13:53","slug":"bandwidth-limitter-using-mod_bw-module-with-apache","status":"publish","type":"post","link":"https:\/\/www.jfdesignnet.com\/?p=195","title":{"rendered":"Bandwidth limitter using mod_bw module with apache"},"content":{"rendered":"

Running a webserver with a lot quantity of virtual server is a double-edged sword. The more hosted site, the more income for us, but for every ten legitimate users, there’s at least one greed user that wants the whole site traffic. This is bad enough under normal circumstances, but it’s even worse when we’re on a co-hosted link and\/or a shared server co-operation, because this will ruins the experience for the other clients AND the other servers on the same link.<\/p>\n

Such was the situation on one of my server the other day, when I was recently made aware that one of the virtual servers was generating the vast majority of network traffic on a shared server on a shared network. I scanned quickly for runaway\/zombie procs and found nothing, except an unusually large number of delay when opening one of the hosted site.<\/p>\n

Well, I have to find a way how to limit that “greedy” user without too much modification made to the server itself because this is one is our main production server. So I started to google around for bandwitdh throttling measures that are spesific to web traffic, and I came across bw_mod<\/a> by Ivan “Bruce” Barrera. It, along with a couple of built-in directives within apache, look to be the easiest solution to my problem, and here’s how I implemented them.<\/p>\n

This mod_bw needs recompile the module using apxs2, so we need apache devel package to do that, install this using apt source from cdrom (to make sure I’ve got the same version libaprutil1 package along with my running apache package) :<\/p>\n

komodo:\/home\/jfdesign# apt-get install libaprutil1-dev
\nReading package lists… Done
\nBuilding dependency tree
\nReading state information… Done
\nThe following packages were automatically installed and are no longer required:
\ncourier-ssl courier-base courier-authlib-userdb
\nUse ‘apt-get autoremove’ to remove them.
\nThe following extra packages will be installed:
\ncomerr-dev libapr1-dev libdb4.6-dev libexpat1-dev libkadm55 libkrb5-dev libldap2-dev libpcre3-dev libpcrecpp0 libpq-dev
\nlibsqlite3-dev libssl-dev uuid-dev
\nSuggested packages:
\ndoc-base db4.6-doc krb5-doc postgresql-doc-8.3 sqlite3-doc
\nThe following NEW packages will be installed:
\ncomerr-dev libapr1-dev libaprutil1-dev libdb4.6-dev libexpat1-dev libkadm55 libkrb5-dev libldap2-dev libpcre3-dev libpcrecpp0
\nlibpq-dev libsqlite3-dev libssl-dev uuid-dev
\n0 upgraded, 14 newly installed, 0 to remove and 0 not upgraded.
\nNeed to get 0B\/6122kB of archives.
\nAfter this operation, 20.7MB of additional disk space will be used.
\nDo you want to continue [Y\/n]? y
\nSelecting previously deselected package uuid-dev.
\n(Reading database … 115845 files and directories currently installed.)
\nUnpacking uuid-dev (from …\/uuid-dev_1.2-1.41.3-1_i386.deb) …
\nSelecting previously deselected package libapr1-dev.
\nUnpacking libapr1-dev (from …\/libapr1-dev_1.2.12-5+lenny1_i386.deb) …
\nSelecting previously deselected package libldap2-dev.
\nUnpacking libldap2-dev (from …\/libldap2-dev_2.4.11-1_i386.deb) …
\nSelecting previously deselected package libexpat1-dev.
\nUnpacking libexpat1-dev (from …\/libexpat1-dev_2.0.1-4_i386.deb) …
\nSelecting previously deselected package libdb4.6-dev.
\nUnpacking libdb4.6-dev (from …\/libdb4.6-dev_4.6.21-11_i386.deb) …
\nSelecting previously deselected package libpcrecpp0.
\nUnpacking libpcrecpp0 (from …\/libpcrecpp0_7.6-2.1_i386.deb) …
\nSelecting previously deselected package libpcre3-dev.
\nUnpacking libpcre3-dev (from …\/libpcre3-dev_7.6-2.1_i386.deb) …
\nSelecting previously deselected package libsqlite3-dev.
\nUnpacking libsqlite3-dev (from …\/libsqlite3-dev_3.5.9-6_i386.deb) …
\nSelecting previously deselected package libssl-dev.
\nUnpacking libssl-dev (from …\/libssl-dev_0.9.8g-15+lenny3_i386.deb) …
\nSelecting previously deselected package libkadm55.
\nUnpacking libkadm55 (from …\/libkadm55_1.6.dfsg.4~beta1-5lenny1_i386.deb) …
\nSelecting previously deselected package comerr-dev.
\nUnpacking comerr-dev (from …\/comerr-dev_2.1-1.41.3-1_i386.deb) …
\nSelecting previously deselected package libkrb5-dev.
\nUnpacking libkrb5-dev (from …\/libkrb5-dev_1.6.dfsg.4~beta1-5lenny1_i386.deb) …
\nSelecting previously deselected package libpq-dev.
\nUnpacking libpq-dev (from …\/libpq-dev_8.3.7-0lenny1_i386.deb) …
\nSelecting previously deselected package libaprutil1-dev.
\nUnpacking libaprutil1-dev (from …\/libaprutil1-dev_1.2.12+dfsg-8+lenny4_i386.deb) …
\nProcessing triggers for man-db …
\nSetting up uuid-dev (1.2-1.41.3-1) …
\nSetting up libapr1-dev (1.2.12-5+lenny1) …
\nSetting up libldap2-dev (2.4.11-1) …
\nSetting up libexpat1-dev (2.0.1-4) …
\nSetting up libdb4.6-dev (4.6.21-11) …
\nSetting up libpcrecpp0 (7.6-2.1) …
\nSetting up libpcre3-dev (7.6-2.1) …
\nSetting up libsqlite3-dev (3.5.9-6) …
\nSetting up libssl-dev (0.9.8g-15+lenny3) …
\nSetting up libkadm55 (1.6.dfsg.4~beta1-5lenny1) …
\nSetting up comerr-dev (2.1-1.41.3-1) …
\nSetting up libkrb5-dev (1.6.dfsg.4~beta1-5lenny1) …
\nSetting up libpq-dev (8.3.7-0lenny1) …
\nSetting up libaprutil1-dev (1.2.12+dfsg-8+lenny4) …
\nkomodo:\/home\/jfdesign#<\/p><\/blockquote>\n

Now insert this repo cause I don’t have apache devel on my cdrom :<\/p>\n

deb http:\/\/ftp.us.debian.org\/debian\/ etch main contrib non-free<\/p><\/blockquote>\n

Reload and then installing apache-threaded devel package :<\/p>\n

komodo:\/home\/jfdesign# apt-get install apache2-threaded-dev
\nReading package lists… Done
\nBuilding dependency tree
\nReading state information… Done
\nThe following packages were automatically installed and are no longer required:
\ncourier-ssl courier-base courier-authlib-userdb
\nUse ‘apt-get autoremove’ to remove them.
\nThe following NEW packages will be installed:
\napache2-threaded-dev
\n0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
\nNeed to get 212kB of archives.
\nAfter this operation, 807kB of additional disk space will be used.
\nGet:1 http:\/\/ftp.us.debian.org lenny\/main apache2-threaded-dev 2.2.9-10+lenny4 [212kB]
\nFetched 212kB in 4s (44.1kB\/s)
\nSelecting previously deselected package apache2-threaded-dev.
\n(Reading database … 117773 files and directories currently installed.)
\nUnpacking apache2-threaded-dev (from …\/apache2-threaded-dev_2.2.9-10+lenny4_i386.deb) …
\nProcessing triggers for man-db …
\nSetting up apache2-threaded-dev (2.2.9-10+lenny4) …
\nkomodo:\/home\/jfdesign#<\/p><\/blockquote>\n

Now compile the mod_bw with apxs2 :<\/p>\n

komodo:\/home\/jfdesign\/mod_bw# apxs2 -i -a -c mod_bw.c
\n\/usr\/share\/apr-1.0\/build\/libtool –silent –mode=compile –tag=disable-static i486-linux-gnu-gcc -prefer-pic -DLINUX=2 -D_GNU_SOURCE -D_LARGEFILE64_SOURCE -D_REENTRANT -I\/usr\/include\/apr-1.0 -I\/usr\/include\/mysql -I\/usr\/include\/openssl -I\/usr\/include\/postgresql -I\/usr\/include\/xmltok -pthread\u00a0\u00a0\u00a0\u00a0 -I\/usr\/include\/apache2\u00a0 -I\/usr\/include\/apr-1.0\u00a0\u00a0 -I\/usr\/include\/apr-1.0 -I\/usr\/include\/postgresql -I\/usr\/include\/mysql\u00a0 -c -o mod_bw.lo mod_bw.c && touch mod_bw.slo
\n\/usr\/share\/apr-1.0\/build\/libtool –silent –mode=link –tag=disable-static i486-linux-gnu-gcc -o mod_bw.la\u00a0 -rpath \/usr\/lib\/apache2\/modules -module -avoid-version\u00a0\u00a0\u00a0 mod_bw.lo
\n\/usr\/share\/apache2\/build\/instdso.sh SH_LIBTOOL=’\/usr\/share\/apr-1.0\/build\/libtool’ mod_bw.la \/usr\/lib\/apache2\/modules
\n\/usr\/share\/apr-1.0\/build\/libtool –mode=install cp mod_bw.la \/usr\/lib\/apache2\/modules\/
\ncp .libs\/mod_bw.so \/usr\/lib\/apache2\/modules\/mod_bw.so
\ncp .libs\/mod_bw.lai \/usr\/lib\/apache2\/modules\/mod_bw.la
\nPATH=”$PATH:\/sbin” ldconfig -n \/usr\/lib\/apache2\/modules
\n———————————————————————-
\nLibraries have been installed in:
\n\/usr\/lib\/apache2\/modules<\/p>\n

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

See any operating system documentation about shared libraries for
\nmore information, such as the ld(1) and ld.so(8) manual pages.
\n———————————————————————-
\nchmod 644 \/usr\/lib\/apache2\/modules\/mod_bw.so
\nkomodo:\/home\/jfdesign\/mod_bw#<\/p><\/blockquote>\n

Done !, easy isn’t it ? The results mod_bw.so module now on \/usr\/lib\/apache2\/modules\/mod_bw.so, and it’s time to add some directive to the apache2.conf or httpd.conf to load the mod_bw module and adjust the parameter. Please make sure this line exist on the apache2.conf and refering to the right path :<\/p>\n

LoadModule bw_module mod_bw.so<\/p><\/blockquote>\n

Within KLIXs, there are nothing to worries, I already compile them and you can install them easily using synaptic or download this and do rpm -Uvh from here.<\/p>\n

Second note :<\/span><\/strong><\/p>\n

One of my server has already been configure well with ispcp under lenny 5.0.3, the problem is I cannot install apxs due to libaprutil1-dev missing and cannot installed by some dependencies issue with libldap2-dev. I cannot find the corresponding libldap2 that can be use to solve this on lenny, but then I found some workaround to achieve this. I have to step backward by using etch repo to track down the libldap2-dev to satisfied them.<\/span><\/p>\n

[root@www jfdesign]# apt-get install libldap2
\nReading package lists… Done
\nBuilding dependency tree
\nReading state information… Done
\nThe following extra packages will be installed:
\nlibgnutls13 liblzo1 libopencdk8
\nSuggested packages:
\ngnutls-bin
\nThe following NEW packages will be installed:
\nlibgnutls13 libldap2 liblzo1 libopencdk8
\n0 upgraded, 4 newly installed, 0 to remove and 0 not upgraded.
\nNeed to get 632kB of archives.
\nAfter this operation, 1610kB of additional disk space will be used.
\nDo you want to continue [Y\/n]? y
\nGet:1 http:\/\/ftp.us.debian.org etch\/main liblzo1 1.08-3 [53.9kB]
\nGet:2 http:\/\/ftp.us.debian.org etch\/main libopencdk8 0.5.9-2 [102kB]
\nGet:3 http:\/\/ftp.us.debian.org etch\/main libgnutls13 1.4.4-3+etch4 [315kB]
\nGet:4 http:\/\/ftp.us.debian.org etch\/main libldap2 2.1.30-13.3 [162kB]
\nFetched 632kB in 4s (133kB\/s)
\nSelecting previously deselected package liblzo1.
\n(Reading database … 46970 files and directories currently installed.)
\nUnpacking liblzo1 (from …\/liblzo1_1.08-3_amd64.deb) …
\nSelecting previously deselected package libopencdk8.
\nUnpacking libopencdk8 (from …\/libopencdk8_0.5.9-2_amd64.deb) …
\nSelecting previously deselected package libgnutls13.
\nUnpacking libgnutls13 (from …\/libgnutls13_1.4.4-3+etch4_amd64.deb) …
\nSelecting previously deselected package libldap2.
\nUnpacking libldap2 (from …\/libldap2_2.1.30-13.3_amd64.deb) …
\nReplaced by files in installed package libldap-2.4-2 …
\nProcessing triggers for man-db …
\nSetting up liblzo1 (1.08-3) …
\nSetting up libopencdk8 (0.5.9-2) …
\nSetting up libgnutls13 (1.4.4-3+etch4) …
\nSetting up libldap2 (2.1.30-13.3) …
\n[root@www jfdesign]#<\/p>\n

then install the devel package :<\/span><\/p>\n

[root@www jfdesign]# apt-get install libldap2-dev
\nReading package lists… Done
\nBuilding dependency tree
\nReading state information… Done
\nThe following NEW packages will be installed:
\nlibldap2-dev
\n0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
\nNeed to get 251kB of archives.
\nAfter this operation, 885kB of additional disk space will be used.
\nGet:1 http:\/\/ftp.us.debian.org etch\/main libldap2-dev 2.1.30-13.3 [251kB]
\nFetched 251kB in 2s (96.3kB\/s)
\nSelecting previously deselected package libldap2-dev.
\n(Reading database … 47015 files and directories currently installed.)
\nUnpacking libldap2-dev (from …\/libldap2-dev_2.1.30-13.3_amd64.deb) …
\nProcessing triggers for man-db …
\nSetting up libldap2-dev (2.1.30-13.3) …
\n[root@www jfdesign]#<\/p>\n

[root@www jfdesign]# dpkg -l | grep ldap
\nii\u00a0 libldap-2.4-2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2.4.11-1+lenny1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 OpenLDAP libraries
\nii\u00a0 libldap2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2.1.30-13.3\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 OpenLDAP libraries
\nii\u00a0 libldap2-dev\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 2.1.30-13.3\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 OpenLDAP development libraries
\nii\u00a0 php5-ldap\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 5.2.6.dfsg.1-1+lenny4\u00a0\u00a0\u00a0 LDAP module for php5
\nii\u00a0 proftpd-mod-ldap\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1.3.1-17lenny4\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 versatile, virtual-hosting FTP daemon – LDAP
\n[root@www jfdesign]#<\/p>\n

Now switch back to lenny repo package, and gladly installed libaprutil-dev with big smile :<\/p>\n

[root@www jfdesign]# apt-get install libaprutil1-dev
\nReading package lists… Done
\nBuilding dependency tree
\nReading state information… Done
\nThe following extra packages will be installed:
\ncomerr-dev libapr1-dev libdb4.6-dev libexpat1-dev libkadm55 libkrb5-dev libmysqlclient15-dev libpcre3-dev libpcrecpp0 libpq-dev libsqlite3-dev
\nlibssl-dev uuid-dev zlib1g-dev
\nSuggested packages:
\ndoc-base db4.6-doc krb5-doc postgresql-doc-8.3 sqlite3-doc
\nThe following NEW packages will be installed:
\ncomerr-dev libapr1-dev libaprutil1-dev libdb4.6-dev libexpat1-dev libkadm55 libkrb5-dev libmysqlclient15-dev libpcre3-dev libpcrecpp0 libpq-dev
\nlibsqlite3-dev libssl-dev uuid-dev zlib1g-dev
\n0 upgraded, 15 newly installed, 0 to remove and 1 not upgraded.
\nNeed to get 13.4MB of archives.
\nAfter this operation, 47.7MB of additional disk space will be used.
\nDo you want to continue [Y\/n]? y
\nGet:1 http:\/\/ftp.us.debian.org lenny\/main uuid-dev 1.2-1.41.3-1 [59.4kB]
\nGet:2 http:\/\/ftp.us.debian.org lenny\/main libapr1-dev 1.2.12-5+lenny1 [826kB]
\nGet:3 http:\/\/ftp.us.debian.org lenny\/main libexpat1-dev 2.0.1-4+lenny3 [224kB]
\nGet:4 http:\/\/ftp.us.debian.org lenny\/main libdb4.6-dev 4.6.21-11 [730kB]
\nGet:5 http:\/\/ftp.us.debian.org lenny\/main libpcrecpp0 7.6-2.1 [94.2kB]
\nGet:6 http:\/\/ftp.us.debian.org lenny\/main libpcre3-dev 7.6-2.1 [260kB]
\nGet:7 http:\/\/ftp.us.debian.org lenny\/main libsqlite3-dev 3.5.9-6 [333kB]
\nGet:8 http:\/\/ftp.us.debian.org lenny\/main zlib1g-dev 1:1.2.3.3.dfsg-12 [163kB]
\nGet:9 http:\/\/ftp.us.debian.org lenny\/main libssl-dev 0.9.8g-15+lenny6 [2242kB]
\nGet:10 http:\/\/ftp.us.debian.org lenny\/main libkadm55 1.6.dfsg.4~beta1-5lenny2 [170kB]
\nGet:11 http:\/\/ftp.us.debian.org lenny\/main comerr-dev 2.1-1.41.3-1 [42.1kB]
\nGet:12 http:\/\/ftp.us.debian.org lenny\/main libkrb5-dev 1.6.dfsg.4~beta1-5lenny2 [92.7kB]
\nGet:13 http:\/\/ftp.us.debian.org lenny\/main libpq-dev 8.3.9-0lenny1 [453kB]
\nGet:14 http:\/\/ftp.us.debian.org lenny\/main libmysqlclient15-dev 5.0.51a-24+lenny2+spu1 [7594kB]
\nGet:15 http:\/\/ftp.us.debian.org lenny\/main libaprutil1-dev 1.2.12+dfsg-8+lenny4 [134kB]
\nFetched 13.4MB in 1min4s (207kB\/s)
\nSelecting previously deselected package uuid-dev.
\n(Reading database … 47171 files and directories currently installed.)
\nUnpacking uuid-dev (from …\/uuid-dev_1.2-1.41.3-1_amd64.deb) …
\nSelecting previously deselected package libapr1-dev.
\nUnpacking libapr1-dev (from …\/libapr1-dev_1.2.12-5+lenny1_amd64.deb) …
\nSelecting previously deselected package libexpat1-dev.
\nUnpacking libexpat1-dev (from …\/libexpat1-dev_2.0.1-4+lenny3_amd64.deb) …
\nSelecting previously deselected package libdb4.6-dev.
\nUnpacking libdb4.6-dev (from …\/libdb4.6-dev_4.6.21-11_amd64.deb) …
\nSelecting previously deselected package libpcrecpp0.
\nUnpacking libpcrecpp0 (from …\/libpcrecpp0_7.6-2.1_amd64.deb) …
\nSelecting previously deselected package libpcre3-dev.
\nUnpacking libpcre3-dev (from …\/libpcre3-dev_7.6-2.1_amd64.deb) …
\nSelecting previously deselected package libsqlite3-dev.
\nUnpacking libsqlite3-dev (from …\/libsqlite3-dev_3.5.9-6_amd64.deb) …
\nSelecting previously deselected package zlib1g-dev.
\nUnpacking zlib1g-dev (from …\/zlib1g-dev_1%3a1.2.3.3.dfsg-12_amd64.deb) …
\nSelecting previously deselected package libssl-dev.
\nUnpacking libssl-dev (from …\/libssl-dev_0.9.8g-15+lenny6_amd64.deb) …
\nSelecting previously deselected package libkadm55.
\nUnpacking libkadm55 (from …\/libkadm55_1.6.dfsg.4~beta1-5lenny2_amd64.deb) …
\nSelecting previously deselected package comerr-dev.
\nUnpacking comerr-dev (from …\/comerr-dev_2.1-1.41.3-1_amd64.deb) …
\nSelecting previously deselected package libkrb5-dev.
\nUnpacking libkrb5-dev (from …\/libkrb5-dev_1.6.dfsg.4~beta1-5lenny2_amd64.deb) …
\nSelecting previously deselected package libpq-dev.
\nUnpacking libpq-dev (from …\/libpq-dev_8.3.9-0lenny1_amd64.deb) …
\nSelecting previously deselected package libmysqlclient15-dev.
\nUnpacking libmysqlclient15-dev (from …\/libmysqlclient15-dev_5.0.51a-24+lenny2+spu1_amd64.deb) …
\nSelecting previously deselected package libaprutil1-dev.
\nUnpacking libaprutil1-dev (from …\/libaprutil1-dev_1.2.12+dfsg-8+lenny4_amd64.deb) …
\nProcessing triggers for man-db …
\nSetting up uuid-dev (1.2-1.41.3-1) …
\nSetting up libapr1-dev (1.2.12-5+lenny1) …
\nSetting up libexpat1-dev (2.0.1-4+lenny3) …
\nSetting up libdb4.6-dev (4.6.21-11) …
\nSetting up libpcrecpp0 (7.6-2.1) …
\nSetting up libpcre3-dev (7.6-2.1) …
\nSetting up libsqlite3-dev (3.5.9-6) …
\nSetting up zlib1g-dev (1:1.2.3.3.dfsg-12) …
\nSetting up libssl-dev (0.9.8g-15+lenny6) …
\nSetting up libkadm55 (1.6.dfsg.4~beta1-5lenny2) …
\nSetting up comerr-dev (2.1-1.41.3-1) …
\nSetting up libkrb5-dev (1.6.dfsg.4~beta1-5lenny2) …
\nSetting up libpq-dev (8.3.9-0lenny1) …
\nSetting up libmysqlclient15-dev (5.0.51a-24+lenny2+spu1) …
\nSetting up libaprutil1-dev (1.2.12+dfsg-8+lenny4) …
\n[root@www jfdesign]#<\/p>\n

[root@www jfdesign]# apt-get install apache2-threaded-dev
\nReading package lists… Done
\nBuilding dependency tree
\nReading state information… Done
\nThe following NEW packages will be installed:
\napache2-threaded-dev
\n0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded.
\nNeed to get 211kB of archives.
\nAfter this operation, 807kB of additional disk space will be used.
\nGet:1 http:\/\/ftp.us.debian.org lenny\/main apache2-threaded-dev 2.2.9-10+lenny6 [211kB]
\nFetched 211kB in 2s (96.3kB\/s)
\nSelecting previously deselected package apache2-threaded-dev.
\n(Reading database … 49016 files and directories currently installed.)
\nUnpacking apache2-threaded-dev (from …\/apache2-threaded-dev_2.2.9-10+lenny6_amd64.deb) …
\nProcessing triggers for man-db …
\nSetting up apache2-threaded-dev (2.2.9-10+lenny6) …
\n[root@www jfdesign]#<\/p>\n

Now I have apxs2 on hand to compile the bandwidth limiter module.<\/p>\n

Some slight modification needs to be patched to mod.bw.c before compilation if you face this error on restarting apache :<\/p>\n

[root@www mod_bandwidth]# \/etc\/init.d\/apache2 restart
\nRestarting web server: apache2We failed to correctly shutdown apache, so we’re now killing all running apache processes. This is almost certainly suboptimal, so please make sure your system is working as you’d expect now! (warning).
\n… waiting ….apache2: Syntax error on line 185 of \/etc\/apache2\/apache2.conf: Syntax error on line 1 of \/etc\/apache2\/mods-enabled\/mod_bw.load: Cannot load \/usr\/lib\/apache2\/modules\/mod_bw.so into server: \/usr\/lib\/apache2\/modules\/mod_bw.so: undefined symbol: apr_atomic_cas
\nfailed!
\n[root@www mod_bandwidth]#<\/p><\/blockquote>\n

And here is the change for mod_bw.c to bypass the compatibility problem :<\/p>\n

\/* Compatibility for ARP < 1 *\/
\n#if (APR_MAJOR_VERSION < 1)
\n#define apr_atomic_inc32 apr_atomic_inc
\n#define apr_atomic_dec32 apr_atomic_dec
\n#define apr_atomic_add32 apr_atomic_add
\n#define apr_atomic_cas32 apr_atomic_cas
\n#define apr_atomic_set32 apr_atomic_set
\n#endif<\/p>\n

to:<\/p>\n

\/* Compatibility for ARP < 1 *\/
\n\/*
\n#if (APR_MAJOR_VERSION < 1)
\n#define apr_atomic_inc32 apr_atomic_inc
\n#define apr_atomic_dec32 apr_atomic_dec
\n#define apr_atomic_add32 apr_atomic_add
\n#define apr_atomic_cas32 apr_atomic_cas
\n#define apr_atomic_set32 apr_atomic_set
\n#endif
\n*\/<\/p><\/blockquote>\n

Compile again the mod_bw.c and you should good to go.<\/p>\n

Just in case the apxs2 doesn’t create you the right LoadModule at \/etc\/apache2\/mods_available and the corresponding symlink on \/etc\/apache2\/mods_enabled, then create yourself. Here is the mod_bw.load on mine :<\/p>\n

LoadModule bw_module \/usr\/lib\/apache2\/modules\/mod_bw.so<\/p><\/blockquote>\n

and don’t forget to create manually the mod_bw.load symlink on \/etc\/apache2\/mods_enabled<\/p>\n

Get it to work :<\/strong><\/p>\n

Most of us think the installation is the hardest part, no! … you wrong, make it work is the most confusing part. I don’t want to expose my setting due to some security problems, but here is some samples, it;s pretty straight forward, so I don’t see any difficulties for any webmaster that installed the virtual host hosting by them self. You should know where you put the Virtual Host setting do you ?<\/p>\n

Configuration sample for Virtual Host :<\/strong><\/p>\n

Limit every user to a max of 10Kb\/s on a vhost :<\/p>\n

<Virtualhost *>
\nBandwidthModule On
\nForceBandWidthModule On
\nBandwidth all 10240
\nMinBandwidth all -1
\nServername www.example.com
\n<\/Virtualhost><\/p>\n

Limit al internal users (lan) to 1000 kb\/s with a minimum of 50kb\/s , and files greater than 500kb to 50kb\/s.<\/p>\n

<Virtualhost *>
\nBandwidthModule On
\nForceBandWidthModule On
\nBandwidth all 1024000
\nMinBandwidth all 50000
\nLargeFileLimit * 500 50000
\nServername www.example.com
\n<\/Virtualhost><\/p>\n

Limit avi and mpg extensions to 20kb\/s.<\/p>\n

<Virtualhost *>
\nBandwidthModule On
\nForceBandWidthModule On
\nLargeFileLimit .avi 1 20000
\nLargeFileLimit .mpg 1 20000
\nServername www.example.com
\n<\/Virtualhost><\/p>\n

Using it the “right” way, with output filter by mime type (for text)
\nto 5kb\/s:<\/p>\n

<Virtualhost *>
\nBandwidthModule On
\nAddOutputFilterByType MOD_BW text\/html text\/plain
\nBandwidth all 5000
\nServername www.example.com
\n<\/Virtualhost><\/p><\/blockquote>\n

Now I can stop the small nagging sites hogging all the bandwidth of my server !!! I nailed you to the floor …<\/p>\n","protected":false},"excerpt":{"rendered":"

Running a webserver with a lot quantity of virtual server is a double-edged sword. The more hosted site, the more income for us, but for every ten legitimate users, there’s at least one greed user that wants the whole site traffic. This is bad enough under normal circumstances, but it’s even worse when we’re on […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,17,9],"tags":[54],"_links":{"self":[{"href":"https:\/\/www.jfdesignnet.com\/index.php?rest_route=\/wp\/v2\/posts\/195"}],"collection":[{"href":"https:\/\/www.jfdesignnet.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jfdesignnet.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jfdesignnet.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jfdesignnet.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=195"}],"version-history":[{"count":0,"href":"https:\/\/www.jfdesignnet.com\/index.php?rest_route=\/wp\/v2\/posts\/195\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.jfdesignnet.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=195"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jfdesignnet.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=195"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jfdesignnet.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=195"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}