$ cat post/cold-bare-metal-hum-/-i-git-bisect-to-old-code-/-packet-loss-remains.md
cold bare metal hum / I git bisect to old code / packet loss remains
Title: A Day in the Life of an Ops Monkey, Nov 6, 2006
November 6, 2006. The year was just starting to show its teeth—autumn leaves had turned golden and brisk winds swept across the northern hemisphere. In tech circles, this month marked the rise of open-source stacks and the continued evolution of sysadmin roles from simple server management to a more technical and script-centric approach. I was in the thick of it, trying to keep our servers running while learning new tools like Xen hypervisor and Python scripting.
The Morning
The day started early as usual with alarms buzzing in my ear—well, not really, but I did get up before dawn to check on a critical server that had gone down during the night. It was always those pesky things that happened when you’re asleep: memory exhaustion on one of our production boxes. After some quick diagnostics (we used Nagios for monitoring), I realized it was time to dig in.
The Scripting Adventures
I spent most of my morning writing a new script to monitor the server’s memory usage and alert us if things got too close to critical levels. We were moving away from our old Perl scripts towards Python because it felt more modern and had better support for web services integration. Today was no exception; I needed to integrate with our custom monitoring dashboard, which used REST APIs.
import requests
def check_memory_usage():
# Some code here to gather memory usage data...
url = "http://monitoring.dashboard/api/memory"
headers = {'Content-Type': 'application/json'}
payload = {
"server": "web01",
"usage_percent": 85,
"timestamp": "2006-11-07T09:30Z"
}
response = requests.post(url, json=payload, headers=headers)
if response.status_code != 200:
print(f"Error posting data to dashboard: {response.text}")
Writing this script was a challenge. It required understanding both the server’s memory metrics and how to format them correctly for our monitoring system. I had to go back and forth between Python documentation, the API spec we kept on Confluence, and our logging files.
The Digg Debate
Around lunchtime, I walked over to the common area where a few of us were discussing the latest news about early Web 2.0 sites like Digg. They had just launched their service in February, but now it was starting to gain traction with users who loved the idea of community-driven news curation. We argued whether Digg or Reddit would become the go-to platform for breaking tech news and discussions.
As a sysadmin, I wasn’t focused on which site was better, but rather how our servers could handle increased load if either site became popular enough to attract significant traffic. We were already working on load balancing strategies and caching mechanisms, so it felt like another opportunity to script something that would help us manage these kinds of spikes.
The Afternoon
Afternoons often meant fixing more issues or doing routine maintenance. Today, I was tasked with setting up a new Xen virtual machine for our development team. We were moving towards using Xen instead of KVM due to its better performance and stability in production environments. Setting it up involved creating a VM template, configuring the networking, and making sure everything was secure.
# Create a new domain from a template
xm create /etc/xen/web01.xml
# Configure network settings in web01.xml
vif = ['mac=00:16:3e:xx:xx:xx, bridge=xenbr0']
# Ensure security policies are set up correctly
setsebool -P xen_vif_net_talktoany 1
It wasn’t always smooth sailing. The xm command was a bit finicky and required careful attention to avoid screwing up the configuration files. But once I had it working, I felt like I was contributing to our team’s ability to handle more complex setups.
The Night
The evening was quiet as usual; most of the office seemed to be winding down for the day. I stayed late tweaking some performance metrics and writing yet another script to help with backups. We were starting to use Rsync for syncing data between servers, and I thought it would be good to automate this process using a cron job.
#!/bin/bash
# Set up crontab entry
echo "* * * * * rsync -avz /var/www/html/ user@backupserver:/backup/web01" >> /etc/cron.d/rsync_web01
# Test the sync
rsync -avz /var/www/html/ user@backupserver:/backup/web01
I was getting better at writing scripts that made our lives easier, but there were always new challenges. The sysadmin role was evolving quickly, and we needed to keep up.
Conclusion
November 6, 2006, was another day in the life of a sysadmin—full of debugging, scripting, and learning. The tech landscape was changing rapidly, with open-source stacks becoming more prevalent, and new tools like Xen hypervisor and Python scripts making our lives both easier and more complex. I couldn’t wait to see what next month would bring.
That’s my journal entry for November 6, 2006. Feel free to leave comments or questions!