Migrate GlusterFS to a New Operating System

During an infrastructure upgrade earlier this year I discovered that the in-place upgrade path between CentOS 6 and CentOS 7 is nonexistent — or at least not advised. Suddenly I found myself stuck with the unexpected task of re-provisioning a cluster of GlusterFS storage servers from scratch. To my relief the process was straightforward and, due to […]

Cache Maven Artifacts With Artifactory

Anyone who has worked with a Java-based project has noticed the tendency of build systems like Maven and Gradle to seemingly “download the Internet” during compilation. The effect is magnified if your workflow uses containers because build artifacts are, by definition, removed after the build process completes. Developers get tired of this waste of time […]

Rate Limiting Baiduspider Using nginx

The Baidu search engine has a voracious appetite for content and crawls one of my sites aggressively. It’s bad enough having to deal with load generated by bots from large technology companies with vast resources, but it’s another thing entirely when those bots crawl from dozens of IP addresses simultaneously and routinely browse thousands of […]

Video Encoding for the Web in 2016

Understanding the tools and technology related to video encoding is like trying to hit a moving target — every few years the scene changes entirely and you have to learn all the latest best practices over again. I recently spent more time than I should have preparing a video of some tanks rolling down the street near […]

Using systemd Timers to Renew Let’s Encrypt Certificates

This is a quick blog post to share the systemd timers that I use to automate the renewal of my Let’s Encrypt certificates. I prefer systemd timers to cron jobs for task scheduling because they are more flexible and easier to debug. I assume that you know what Let’s Encrypt is and that you already […]