$ cat post/the-deploy-pipeline-/-a-midnight-pager-i-still-hear-/-the-stack-still-traces.md

22MAR04

the deploy pipeline / a midnight pager I still hear / the stack still traces

Title: March 2004: A Month of Scripting Hell and Xen Dreams

March 2004 was a month where the open-source community really started to take off. I remember it like yesterday, sitting in my cramped office at work, surrounded by the sound of hard drives spinning and keyboards clacking away with scripts that wouldn’t stop running.

The Setup

We were using Apache 1.3.x with mod_perl for our backend services. Perl was still king, but everyone was eyeing Python as the next big thing. Our server farm ran on a mishmash of Red Hat 7.2 and Debian, with Xen hypervisors slowly making their way into the mix. The network was filled with gigabit switches, and we were starting to see more folks move away from proprietary solutions.

Debugging Nightmares

One evening, I found myself staring at what seemed like an endless loop of failures in one of our production servers. It was a script that managed backups—simple enough on paper but had somehow turned into a nightmare when it started causing the server to freeze up during peak hours. I spent hours pouring over logs and scripts, trying to figure out where the bottleneck was.

# The script in question
while true; do
  /usr/bin/mysqldump -u root --all-databases > /mnt/backup/dump.sql
  sleep 600
done

The logic seemed straightforward enough, but as the months went by, the server started to lag more and more. I tried adding ulimit settings, tweaking cron jobs, even rewriting parts of it in Python. Nothing worked until one night when I finally spotted a hidden race condition.

# A simplified version of what I found
import os

while True:
    if not os.path.exists('/mnt/backup/dump.sql'):
        with open('/mnt/backup/dump.sql', 'w') as f:
            print("Creating backup...")

The script was creating the file but never checking for its existence before writing to it, leading to endless cycles of creating and overwriting. After a few tweaks and adding proper checks, things finally settled down.

Xen Hypervisor Frenzy

On another front, we were just starting to experiment with Xen. The dream was clear: more efficient use of hardware resources by running multiple virtual machines on a single host. But reality hit hard. We started seeing odd kernel panics and performance issues that made us question if we had really picked the right path.

# A snippet from our setup script
xm create -f /etc/xen/myvm.conf

The Xen documentation was still a bit sparse, so debugging became a process of trial and error. We managed to get a few VMs running, but stability was an issue. Every day brought new challenges—fixing memory leaks, adjusting configuration settings, and trying out different versions of the hypervisor.

The Firefox Launch

While all this chaos was going on in my life, outside the world was changing too. Firefox launched in early April, and everyone was talking about it. I remember downloading it and playing with it during lunch breaks. It felt like a breath of fresh air compared to Internet Explorer.

<!-- A simple HTML snippet from one of our internal documents -->
<html>
<head><title>Internal Document</title></head>
<body>
  <h1>Welcome to the New World</h1>
  <p>We're exploring new technologies and tools every day.</p>
</body>
</html>

Firefox wasn’t just a browser; it symbolized a shift in thinking—openness, freedom from proprietary software.

Learning and Evolving

That month taught me a lot about the power of scripting languages like Perl and Python. It showed me that with enough patience and persistence, you can debug even the most stubborn scripts. And while Xen was still a work-in-progress, it represented the future—a more efficient use of hardware resources and a step towards cloud computing.

Looking back, March 2004 wasn’t just about fixing bugs or launching browsers; it was about evolving as a developer in a rapidly changing tech landscape. It’s those moments that shape us, whether we like it or not.

That’s the kind of raw, honest reflection on my personal experience during that period.