Archive | Apache

maxclients.sh Script For Apache

By admin on May 3, 2014 in Apache, Bash Scripting

This script attempts to look at Apache memory usage and recommend a stable setting for MaxClients.

#!/bin/bash

PROCNAME=httpd
PARENTPIDS=`comm -12 <(ps -C $PROCNAME -o ppid | sort -u) <(ps -C $PROCNAME -o pid | sort -u)`

for ParPID in $PARENTPIDS; do
  SUM=0
  COUNT=0
  for x in `ps f --ppid $ParPID -o rss | tail -n +2`; do
    SUM=$(( $SUM + $x ))
    COUNT=$(( $COUNT + 1 ))
  done

  MEMPP=$(( $SUM / $COUNT / 1024 ))
  FREERAM=$(( `free | tail -2 | head -1 | awk '{print $4}'` / 1024 ))
  APACHERAM=$(( $SUM / 1024 ))
  APACHEMAX=$(( $APACHERAM + $FREERAM ))

  (
  echo
  echo "Info for the following parent apache process:"
  echo "  "`ps f --pid $ParPID -o command | tail -n +2`
  echo
  echo "Current # of apache processes:        $COUNT"
  echo "Average memory per apache process:    $MEMPP MB"
  echo "Free RAM (including cache & buffers): $FREERAM MB"
  echo "RAM currently in use by apache:       $APACHERAM MB"
  echo "Max RAM available to apache:          $APACHEMAX MB"
  echo
  echo "Theoretical maximum MaxClients:  $(( $APACHEMAX / $MEMPP ))"
  echo "Recommended MaxClients:          $(( $APACHEMAX / 10 * 9 / $MEMPP ))"
  echo
  )
done

#!/bin/bash

PROCNAME=httpd

PARENTPIDS=`comm -12 <(ps -C $PROCNAME -o ppid | sort -u) <(ps -C $PROCNAME -o pid | sort -u)`

for ParPID in $PARENTPIDS; do

SUM=0

COUNT=0

for x in `ps f --ppid $ParPID -o rss | tail -n +2`; do

SUM=$(( $SUM + $x ))

COUNT=$(( $COUNT + 1 ))

done

MEMPP=$(( $SUM / $COUNT / 1024 ))

FREERAM=$(( `free | tail -2 | head -1 | awk '{print $4}'` / 1024 ))

APACHERAM=$(( $SUM / 1024 ))

APACHEMAX=$(( $APACHERAM + $FREERAM ))

(

echo

echo "Info for the following parent apache process:"

echo " "`ps f --pid $ParPID -o command | tail -n +2`

echo

echo "Current # of apache processes: $COUNT"

echo "Average memory per apache process: $MEMPP MB"

echo "Free RAM (including cache & buffers): $FREERAM MB"

echo "RAM currently in use by apache: $APACHERAM MB"

echo "Max RAM available to apache: $APACHEMAX MB"

echo

echo "Theoretical maximum MaxClients: $(( $APACHEMAX / $MEMPP ))"

echo "Recommended MaxClients: $(( $APACHEMAX / 10 * 9 / $MEMPP ))"

echo

)

done

Apache Watch Script

By admin on May 3, 2014 in Apache, Bash Scripting

Here’s a trivial old script that I sometimes use to monitor for rough processes running on the apache user:

#!/bin/bash

TEST=`ps auxw | grep apache | grep -v "httpd" | grep -v apachewatch | grep -v grep `

if [ "$TEST" != "" ]; then
echo "test";
        echo "Subject: RP apache alert
To: support@reliablepenguin.com

Alert ... something fishy on RP ...

-------
$TEST
-------

" | /usr/sbin/sendmail support@reliablepenguin.com

fi

#!/bin/bash

TEST=`ps auxw | grep apache | grep -v "httpd" | grep -v apachewatch | grep -v grep `

if [ "$TEST" != "" ]; then

echo "test";

echo "Subject: RP apache alert

To: support@reliablepenguin.com

Alert ... something fishy on RP ...

-------

$TEST

-------

" | /usr/sbin/sendmail support@reliablepenguin.com

Plesk 11 – vhost.conf File For Nginx

By admin on April 21, 2014 in Apache, Nginx, Plesk

We’re all familier with using a vhost.conf file on Plesk to provide custom Apache directives to an individual virtual host. Originally the file was located at:

/var/www/vhosts/domain.com/conf/vhost.conf

1	/var/www/vhosts/domain.com/conf/vhost.conf

Recent versions of Plesk have moved the file to:

/var/www/vhosts/system/domain.com/conf/vhost.conf

1	/var/www/vhosts/system/domain.com/conf/vhost.conf

And of course there is an SSL version of the file at:

/var/www/vhosts/system/domain.com/conf/vhost_ssl.conf

1	/var/www/vhosts/system/domain.com/conf/vhost_ssl.conf

The good news is there’s also now a file for Nginx at:

/var/www/vhosts/system/domain.com/conf/vhost_nginx.conf

1	/var/www/vhosts/system/domain.com/conf/vhost_nginx.conf

By default these files don’t exist and are not included in the configuration. So you’ll need to create the file and then run:

/usr/local/psa/admin/sbin/httpdmng --reconfigure-all

1	/usr/local/psa/admin/sbin/httpdmng --reconfigure-all

/usr/local/psa/admin/sbin/httpdmng --reconfigure-domain domain.com

1	/usr/local/psa/admin/sbin/httpdmng --reconfigure-domain domain.com

Generate Rewrite Rules From CSV File

By admin on April 21, 2014 in Apache

Here’s a simple Perl script that can be used to convert a CSV file of redirects into Apache rewrite rules:

#!/usr/bin/perl
while(<STDIN>) {
        chomp();
        ($f_url,$t_url) = split(/\,/);
        if ($f_url =~ /^(.*?)\?(.*)/) {
                print "RewriteCond %{QUERY_STRING} ^" . $2 . "\$\n";
                $f_url = $1;
        };
        $f_url =~ s/^\/(.*)$/$1/gm;
        print "RewriteRule ^" . $f_url . " " . $t_url . "? [R=permanent,L]\n";
        print "\n";
}

#!/usr/bin/perl

while(<STDIN>) {

chomp();

($f_url,$t_url) = split(/\,/);

if ($f_url =~ /^(.*?)\?(.*)/) {

print "RewriteCond %{QUERY_STRING} ^" . $2 . "\$\n";

$f_url = $1;

};

$f_url =~ s/^\/(.*)$/$1/gm;

print "RewriteRule ^" . $f_url . " " . $t_url . "? [R=permanent,L]\n";

print "\n";

}

The script assumes that you have 2 column – the source URL and the destination URL. You might invoke the script like this:

cat myredirects.csv | ./makerules.pl >> .htaccess

1	cat myredirects.csv \| ./makerules.pl >> .htaccess

Sometimes the CSV file will be DOS formatted to I’ll do:

cat myredirects.csv | dos2unix | ./makerules.pl &gt;&gt; .htaccess

1	cat myredirects.csv \| dos2unix \| ./makerules.pl >> .htaccess

There are may ways that this script could be expanded or improved but it’s a good starting point for the typical case.

Lightweight 404 For Apple Touch Icons

By admin on April 15, 2014 in Apache

Had a site recently that was complaining about bandwidth consumed by request for apple-touch-icon* files as described here:

http://mathiasbynens.be/notes/touch-icons

The customized 404 page on the site was using about 55K bytes for each request. I added the following rewrite rule:

RewriteRule ^apple-touch-icon(.*) - [R=404,L,NC]

1	RewriteRule ^apple-touch-icon(.*) - [R=404,L,NC]

This results in about 500 bytes per request or a 100 fold reduction.

Of course a nicer solution would be add pretty touch icons to the site!

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Archive | Apache

maxclients.sh Script For Apache

Apache Watch Script

Plesk 11 – vhost.conf File For Nginx

Generate Rewrite Rules From CSV File

Lightweight 404 For Apple Touch Icons