Articles tagged with apache

1. MySQL OOM'ed, But Pelican Lives

   Posted on February 15, 2016 in System Administration

   I use Pingdom's free service to monitor slaptijack.com. Apparently, late Friday night, oom-killer decided that the server needed more memory and took out the MySQL server. To make matters worse, I missed the alarm from Pingdom, and slaptijack.com was down for pretty much all of Saturday. The fact …

2. Puppet + Augeas: Modify Logrotate Configuration

   Posted on March 12, 2014 in System Administration

   On my web server, I keep my web sites in /var/lib/www. Each web site has a dedicated logs directory. Since logrotate is already rotating Apache logs on the server, I'd like to continue using that to rotate these log files as well. Below, is a Puppet snippet that …

3. Apache Can't Use Remote MySQL Server When SELinux is Enabled

   Posted on August 20, 2012 in System Administration

   I don't know why SELinux problems seem so frustrating. The problem almost certainly is related to the fact that there is frequently no error message. This is exactly the problem I ran into while turning up a new Apache web server on Red Hat Enterprise Linux 6 (RHEL6) with SELinux …

4. ab Results Before and After Server Move

   Posted on May 25, 2011 in System Administration

   

   Behold, the benefits of virtualization!

   I spent most of the evening preparing to move a few websites. I decided to do some benchmarking just to see what sort of improvement I was getting from the new server setup. Although the old server didn't feel slow when browsing sites, the results …

5. WordPress Permalinks Not Working

   Posted on July 30, 2010 in System Administration

   While setting up a new blog for an old site the other day, I ran into a situation where the main page would work, but individual posts would result in a 404 (page not found) error. Checking the error log revealed that Apache could not find the file it was …

6. Apache: Setting Expire and Cache-Control Headers for Image Files

   Posted on April 24, 2010 in System Administration

   One of the suggestions for improving the performance of your website is to properly set the Expire and Cache-Control headers of the HTTP response for images. Since images rarely change, the Expire time should be set far in the future. This ensures that web browsers will attempt to retrieve the …

7. Warning: DocumentRoot does not exist

   Posted on March 24, 2010 in System Administration

   If you're using Red Hat Enterprise Linux (RHEL) or one of it's variants (CentOS, etc.), you may have noticed that using a non-standard document root for your Apache-based web site results in a DocumentRoot does not exist warning if the directory exists. The most likely cause of this problem is …

8. Apache, SSL, Rails and a Broken Redirect

   Posted on February 06, 2008 in Programming

   If you are using Apache and <acronym title="Secure Sockets Layer">SSL</acronym> as a proxy front-end for your Ruby on Rails application, you might have a problem with redirects if the backend server (Mongrel, for example) does not use SSL.

   In a nutshell, you'll discover that redirects are sent …

9. Let's Install JSON for PHP 5

   Posted on January 25, 2008 in System Administration

   I recently started messing around with building my own Facebook application. I figured the best way to start learning was to download the demo application and get it working on the Slaptijack web server. I quickly ran into a problem:

   PHP Fatal error:  Call to undefined function json_encode()
   

   The problem …