Farewell, processd: We Threw a Retirement Party for a Daemon Older Than Some of Our Interns

It started the way these things always start: someone asked a question in Slack and everyone went quiet.

"Hey, what does processd do? It's on the prod boxes. All of them."

Fifteen years. That's how long this daemon had been running on our infrastructure. It predated our current company name. It predated our onboarding docs. It may have predated at least two of our interns' ability to legally drive. And nobody — not the CTO, not the guy who wrote our original infrastructure from a garage in Austin, not even the machine itself — could say what it did.

The Archaeology Phase

Every legacy daemon leaves behind artifacts, and processd was basically the Lascaux caves. A single man page from 2009. A config file with comments in someone's handwriting-style ASCII art. A mailing list thread from a company that no longer exists, where a person named Dave called it "a stopgap until we build the real thing."

Dave, wherever you are, your stopgap outlived three rewrites of "the real thing."

The standard playbook here is simple: trace the dependencies, check what connects to it, stage a controlled shutdown in a sandbox, and watch what screams. So we did. We killed it in staging on a Tuesday afternoon.

Nothing screamed. Nothing broke. The dashboards stayed green. We shrugged, we scheduled the production kill for the following week, and we went to lunch feeling pretty good about ourselves.

That was our first mistake.

The Stakeholders Come Out of the Woodwork

Here's a universal law of sysadmin life: the moment you announce a decommission, people who have never logged into the system in their lives will materialize with urgent business needs.

First it was the billing team, who discovered that some nightly job they'd inherited from a contractor was silently reading a file that processd rotated. Then it was a VP of something adjacent to compliance, who asked if we were "sure it's not load-bearing." Then it was a guy from the Chicago office who — and I want to be clear about this — emailed the whole company to say he "might have a cron that touches it."

He did not know. He could not find out. He asked us to keep it running "just in case," which is how we got here, people. That's how ALL of us got here.

We spent three weeks doing dependency archaeology. We found the billing job, we found Dave's cron (the Chicago guy, unbelievably, was right), and we found a monitoring script written by an employee who left in 2013 that would page the entire on-call rotation if processd ever stopped. That one was fun to explain to the on-call rotation.

The Kill Day

We did it on a Friday at 10 a.m., because we are professionals who understand risk management, and also because we wanted the weekend to feel earned.

The actual command took four seconds. systemctl stop processd && systemctl disable processd. Fifteen years of uptime, ended in less time than it takes to microwave a Hot Pocket.

The process count dropped by one. The dashboards stayed green. The billing job ran that night without incident. And then, at 10:04 a.m., someone in the infra channel posted a screenshot of the empty process slot, and something unexpected happened: people started sharing memories.

The guy who found the original 2009 commit. The on-call engineer who once debugged it over a hotel Wi-Fi in Cleveland. Dave's successor's successor, who confirmed via LinkedIn that Dave is now a beekeeper in Vermont, which honestly tracks.

What We Learned (Besides Grief)

Here's the thing nobody tells you about killing a legacy daemon: the process was never the hard part. The hard part is that undocumented services accumulate meaning. They become the connective tissue between teams, the answer to questions nobody asked out loud. Every one of them is a monument to some decision made by a person who assumed, reasonably, that someone would write it down.

Somebody never does. Somebody never writes it down.

So do yourself a favor. Run ps aux right now. Find the daemon you can't explain. Start the archaeology before the Slack question comes, and for the love of all that is holy, write down what Dave knew.

Rest easy, processd. The process table looks empty without you.