Category: Webservers

Apache Watch Script

May 3, 2014

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

April 21, 2014

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

April 21, 2014

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 >> .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.

Increase Nginx Upload Limit On Server With Plesk Panel

April 15, 2014

From the Plesk Panel you can set the PHP upload_max_filesize at Website & Domains -> PHP Setting. But if you’re using Nginx then you may also need to configure Nginx to allow larger uploads. We saw errors like this in the /var/log/nginx/error_log:

2014/04/15 15:33:19 [error] 18042#0: *21376 client intended to send too large body: 1300191 bytes, client: x.x.x.x, server: , request: "POST /index.php/amfile/adminhtml_file/update/ HTTP/1.1", host: "dev.acme.com", referrer: "http://dev.acme.com/index.php/admin/catalog_product/edit/id/"

1	2014/04/15 15:33:19 [error] 18042#0: *21376 client intended to send too large body: 1300191 bytes, client: x.x.x.x, server: , request: "POST /index.php/amfile/adminhtml_file/update/ HTTP/1.1", host: "dev.acme.com", referrer: "http://dev.acme.com/index.php/admin/catalog_product/edit/id/"

To resolve the issue edit /etc/nginx/nginx.conf and set client_max_body_size by adding the highlighted line:

    server_tokens off;

    client_max_body_size 15m;

    include /etc/nginx/conf.d/*.conf;
}

server_tokens off;

client_max_body_size 15m;

include /etc/nginx/conf.d/*.conf;

}

Lightweight 404 For Apple Touch Icons

April 15, 2014

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!

Reliable Penguin provides managed web hosting, systems administration, website and server migrations, and expert consulting.

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