DevOps & System Administration

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DevOps & System Admin.

Constructing a Vagrant Cluster for Chef Development

Integrating Chef server with a Vagrant cluster provides an easy method to develop Chef configurations for new production server clusters.

DevOps & System Admin.

Making AWS More Affordable with EC2 Scheduling

There is no built-in feature to provide EC2 scheduling. However, the tools exist to readily create your own schedule and reduce the cost of running on AWS.

DevOps & System Admin.

Production Logging for Sinatra Applications

Exception logging for production Sinatra apps can be tough to set up. Here's how to set up logging of request and errors for your production environment.

DevOps & System Admin.

Multiple Ubuntu Installations with Grub

The steps I used to configure a small Grub partition used to chainload multiple Ubuntu installations on separate partitions.

DevOps & System Admin.

Load Balancing and Reverse Proxying with Nginx, Updated

Nginx can be easily setup for load balancing and remote proxying for web applications. See a working implementation with explanations.

DevOps & System Admin.

Taming Your Cluster with ZooKeeper

Clusters and distributed systems can be tamed with Zookeeper, which guarantees sequential, atomic, reliable, and consistent data across your cluster.

DevOps & System Admin.

Building a Virtual Appliance – Repeatably

In order to easily distribute a complicated piece of software, we created a virtual machine appliance. We developed an automated and modular build process.

DevOps & System Admin.

OVF? OVA? VMDK? – File Formats and Tools for Virtualization

The landscape in this area (building Virtual Machines / Virtual Appliances / Cloud Images) is very rapidly changing, and new options are popping up every day.

DevOps & System Admin.

Hosting Provider ‘Upgrade’ Changes Stolen CPU

One of our VM's recently had a huge jump in stolen CPU / %steal CPU time. I investigated and found that our VM's CPU allocation had been deprioritized.

DevOps & System Admin.

Using Vagrant AWS with Capistrano

In switching my Vagrant workflow from VirtualBox to AWS, I ran into a problem; and in solving it, I discovered a better way to integrate Vagrant with Capistrano.

DevOps & System Admin.

Easier Capistrano Deploys from GitHub with ssh-agent

Far, far too often I forget to start the ssh-agent before I use Capistrano to deploy. Here's a quick little snippet to help you avoid that mistake.

DevOps & System Admin.

Linux Encryption in the Cloud using LUKS on Linode

See how I set up Linux encryption using LUKS on Linode with an encrypted root partition. Includes Linode boot process, GRUB, cryptsetup, and dm-crypt.

DevOps & System Admin.

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