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Posts by drmorr

* I will not review proposals that have been written by a robot instead of a human, please don't waste my time. Also the CFP specifically says slop proposals are unwelcome and might get you banned, so it won't help you to submit one anyways.

5 days ago 0 0 0 0
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Call For Proposals (CFP) | LF Events KubeCon + CloudNativeCon gathers adopters and technologists from leading open source and cloud native communities from November 9-12. Join our current graduated, incubating, and sandbox projects as…

Btw, CFP for kubecon NA is open. Deadline is May 31st. I have never been on the committee, but I have a good track record of getting talks in, and I have a standing offer to review your proposal if you want or need help with it*. Send me a DM!

events.linuxfoundation.org/kubecon-clou...

#kubecon

5 days ago 2 0 1 0
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Boy AMI glad to see you We’re pleased to announce that two AMIs (Amazon Machine Images) have joined the SimKube family!

The second post, available to paid subscribers until next week, talks about our new (very exciting) SimKube AMIs available on the AWS Marketplace!

blog.appliedcomputing.io/p/boy-ami-gl...

#simkube #ami #aws

6 days ago 0 0 0 0
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Stop Reading Changelogs: Safer Kubernetes upgrades with simulation SRECon 2026 Talk Transcript

Two new blog posts today! First is the (now public) transcript from my SRECon talk: "Stop Reading Changelogs: Safer Kubernetes upgrades with simulation"

blog.appliedcomputing.io/p/stop-readi...

#srecon #kubernetes #k8s

6 days ago 1 0 1 0

I'm trying a new experiment with my blog: all posts will still be public, but I'm going to leave them behind a paywall for a week. As I have mentioned, I'm trying to get a few more paid subscribers to help support ACRL's conference attendance, which is were I'm able to get most of my new leads.

1 week ago 0 0 0 0
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Stop Reading Changelogs: Safer Kubernetes upgrades with simulation SRECon 2026 Talk Transcript

This week's blog post, which is a recap of my SRECon talk from last week, is now available for paid subscribers only, and will be available for free to the general public next Monday! Check it out if you want.

blog.appliedcomputing.io/p/stop-readi...

#kubernetes #srecon #simkube

1 week ago 1 0 1 0

oh damn -- thanks! Just fixed.

2 weeks ago 1 0 0 0

Ok that's over. Lots of great questions and interaction! My slides and other materials are up on GitHub if you want to know more :)

github.com/acrlabs/srec...

#srecon

2 weeks ago 3 0 1 0

Thanks for the kind words! It was less a "cautionary tale" and more of a "motivating case study", but in any case, it's an excellent postmortem and a fun read :)

2 weeks ago 1 0 0 0
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My talk at SRECon is in two hours! Come check it out and learn how simulation can help you with your Kubernetes upgrades!

#srecon #kubernetes

2 weeks ago 3 1 1 0
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drmorr (@drmorr@hachyderm.io) 5.58K Posts, 169 Following, 295 Followers · Optimizer. Photographer. In disbelief that computers actually work. Accidentally writing a role-playing game. (he/him)

SRECon first impressions: it is wet. Why is it wet. In Seattle??? In March?????

Anyways, as normal I'm going to liveblog along on Mastodon, follow along if you want!

hachyderm.io/@drmorr

#srecon

2 weeks ago 2 0 0 0
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drmorr (@drmorr@hachyderm.io) 5.58K Posts, 169 Following, 295 Followers · Optimizer. Photographer. In disbelief that computers actually work. Accidentally writing a role-playing game. (he/him)

SRECon first impressions: it is wet. Why is it wet. In Seattle??? In March?????

Anyways, as normal I'm going to liveblob along on Mastodon (sorry not sorry, I tried the "liveblog on two platforms at once" thing and it's too hard), follow along if you want!

hachyderm.io/@drmorr

#srecon

2 weeks ago 1 0 0 0

I know all the cool kids are at KubeCon EU this week, but _this_ cool kid is gonna be at SRECon in Seattle! I'm giving a talk: "Stop Reading Changelogs: Safer Kubernetes Upgrades with Simulation" on Wednesday at 11:55-12:40.

Come find me and say hi! Would love to chat.

#srecon

2 weeks ago 4 0 0 0
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Everything you need to run a single Kubernetes pod OK, as promised last week, this post is a follow-on to my previous write-up about running a single-node Kubernetes cluster at ACRL.

Do you want to read a 4,000-word architecture diagram detailing everything you need to run a single Kubernetes pod? Sure you do!

blog.appliedcomputing.io/p/everything...

#kubernetes #k8s

3 weeks ago 0 0 0 0

The OOM metrics situation is genuinely frustrating. Half the time you're debugging memory issues with metrics that don't tell the actual story.

1 month ago 3 1 0 0
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Three subtle Kubernetes issues I've seen in the last week Well I was going to use this post to provide a follow-up to the hot garbage from a few weeks ago, wherein I complain about my efforts to stand up an internal ACRL Kubernetes cluster and run something ...

In today's blog post I a) recap my epic rant about OOM metrics from last week, and b) complain about other weird things I learned about Kubernetes recently.

blog.appliedcomputing.io/p/three-subt...

#kubernetes #k8s #devops

1 month ago 2 0 1 0
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SRECon26 | David Morrison | Cal.com SRECon26

Awesome! I have a calendar set up that I'm trying to schedule things on, do you want to book some time? Or just play it by ear when it gets a little closer?

cal.com/drmorr/sreco...

1 month ago 0 0 0 0

I'll be there! Any interest in meeting up?

1 month ago 1 0 1 0
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Frustrations with Version Control Alright, it’s been a long time since I’ve posted a good rant on here, so buckle up buttercup.

In today's blog post, I complain about version control systems.

blog.appliedcomputing.io/p/frustratio...

#git #jj #software

1 month ago 2 1 0 0
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Quick Update about the Blog Hi friends!

A Quick Update about the Blog, aka, wouldn't you like to pay money to read more about SimKube? 😂

blog.appliedcomputing.io/p/quick-upda...

1 month ago 0 0 0 0
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Subscribe to Applied Computing Research Labs Open-source research and development in distributed systems. Click to read Applied Computing Research Labs, by drmorr, a Substack publication.

I would love to get more paid subscribers to my blog. As I've said before, the income from my blog isn't how I make a living---but it does help in for sending me to conferences, and conferences are my best source for new leads and sales opportunities.

blog.appliedcomputing.io/subscribe

2 months ago 1 0 0 0

Very excited that I'll be speaking at SRECon in Seattle this year! My talk title is "Stop Reading Changelogs: Safer Kubernetes Upgrades with Simulation" (naturally), and I'm speaking on Wednesday March 25 at 11:55.

See the full program here!

www.usenix.org/conference/s...

2 months ago 1 0 0 0

"Look, I spent all weekend doing absolutely nothing, I just got my kid to school (somehow), I haven't had any caffeine, I barely remember what my job is, much less what I was doing last week or -- let's be honest, who you are -- and yet, for some reason you want to meet with me?"

3 months ago 0 0 0 0

I almost think I hate Monday meetings more than Friday meetings, tbh.

3 months ago 0 0 1 0

Just typo'ed `Dorkerfile` and I'm pretty sure that is actually correct

4 months ago 0 0 0 0

Oops I somehow managed to turn my Makefile into an infinite loop.

4 months ago 0 0 0 0

OK it's friday, time for the ultimate bikeshedding, aka, fixing my Makefiles.

Basically a task you can spend ENDLESS amounts of time on and still not be done.

4 months ago 0 0 1 0
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Postmortem: Intermittent Failure in SimKube CI Runners On Wednesday, November 26, 2025, while testing changes to ACRL’s SimKube CI Runner, an ACRL employee discovered an intermittent failure in the runner.

ACRL's first public postmortem is now available for free subscribers :P

Learn more about how a race condition between cert-manager, the SimKube controller, and a mutating webhook configuration took down our (currently unavailable to the public) CI runner!

blog.appliedcomputing.io/p/postmortem...

4 months ago 1 0 0 0
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cargo clippy is one of the best linting tools I've ever worked with.

"It looks like you're trying to write a Rust program, and you fucking suck at it. Try doing it this way instead!"

4 months ago 4 0 1 0

Who's excited for ACRL's first public postmortem next Monday? (Or tomorrow if you're a premium subscriber :P)

4 months ago 1 0 0 0