Vagrant hangs at boot/GRUB (FIX)

When Vagrant hangs at boot time and GRUB is being displayed, then perform the following steps to get your vagrant machine working again.

  1. Stop the machine using the Virtualbox GUI
  2. Start the machine using the Virtualbox GUI
  3. Perform “update-grub” as root user (or with sudo)
  4. Stop the machine using the Virtualbox GUI
  5. Start the machine headless using “vagrant up”

dst cache overflow

Today one of our cloudservers had some really strange network problems I could not explain. At first I thought it was caused by a mini DDOS or something similair but that wasn’t the case. After spitting through all apache log files and still not being able to fix the problem I found the following kernel messages. Lees verder

MongoDB Indexes

Indexes are the subject of week 4 of MongoDB University. Don’t worry the weeks between 1 and 4 will come along 😉

Indexes are the single most important factor in database performance. Having no indexes or indexes on the wrong fields can make your application extreme slow. Lees verder

Python Basics

About a month ago I decided to broaden my horizon by signing in for a study of MongoDB. It turned out that this course was given in Python, another language that was on my wishlist. Currently I’m in week 3 and I felt it was time to make a little summary for the things I’ve learned. Lees verder

Ubuntu recovery mode does not work

Yesterday I was having trouble entering the recovery mode of Ubuntu. Selecting the recovery mode just resulted into a normal boot even when I added “single” to the kernel boot options in Grub. A friend told me that adding the following phrase to the kernel boot options would help me drop to the root prompt without having the root filesystem mounted.

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CakePHP Plugin for New Relic

New Relic is an application monitoring solution for PHP (and other languages) which gives you more information about the performance of your application. It works well with all major frameworks (including CakePHP). Little problem for me is that CakePHP has it’s own error handling – which catches any error before it can be fetched by the New Relic PHP agent.

Because our server and availability monitoring is already done by New Relic, I decided to build a custom error handler in CakePHP which uses the PHP API of the New Relic PHP Agent. So all monitoring can be done through New Relic.

You can find the plugin with the error handler here: https://github.com/turnred/newrelic-cakephp (Work In Progress)