drmorr
@drmorr.appliedcomputing.io
Optimizer. Photographer. In disbelief that computers actually work. Accidentally writing a role-playing game. (he/him) https://hachyderm.io/@drmorr
In this week's post, I talk about Karpenter, scheduling, bin-packing, and why it's all a giant can of worms. Enjoy! blog.appliedcomputing.io/p/karpenters... #kubernetes #karpenter #k8s
Karpenter's consolidation behaviour is counter-intuitive
OK, this story starts off with a colleague messaging me at 9am on a Tuesday morning: “Hey, drmorr, Karpenter is behaving a little bit strangely in this cluster, could you take a quick look?”
blog.appliedcomputing.io
Heyyyy you guuuuiiiiiise I decided one Kubernetes simulator wasn't enough so last week I wrote another one. github.com/acrlabs/sk-s...
GitHub - acrlabs/sk-spark: Discrete event simulator for Kubernetes spark jobs
Discrete event simulator for Kubernetes spark jobs - acrlabs/sk-spark
github.com
Last week my colleague Ian O'Gorman spent wayyyyy too much time debugging issues in our CI pipeline. That's a good 400 hours of his life he's never getting back. But, hey, at least he got to write a blog post about it! Buckle up, it's a banger! blog.appliedcomputing.io/p/the-seven-...
The Seven Stages of CI Grief
On the pain scale, a root canal might be an eight.
blog.appliedcomputing.io
The last couple weeks I was on vacation in Korea and Japan, but my coworker Ian wrote a blog post about improving the KWOK behaviour in SimKube! blog.appliedcomputing.io/p/worth-the-... #kubernetes #k8s #kwok #simkube
Worth the Wait: Making SimKube Pod Startup More Realistic
If you’re detail-oriented, skeptical, or just enjoy watching Pod transitions in your spare time, you may have noticed a peculiar behavior in SimKube: Pods transition to Running very quickly.
blog.appliedcomputing.io
Oops, I got mad and wrote a bonus blog post this week. Maybe ignore it if you also don't want to get mad. blog.appliedcomputing.io/p/stop-accus...
Stop accusing people of cheating with LLMs
This is a bonus post for the week, because I’m frustrated and mad.
blog.appliedcomputing.io
This week's blog post is about the work that my students at Harvey Mudd College did to turn SimKube into a reinforcement learning arena for AI agents! blog.appliedcomputing.io/p/simarena-a...
SimArena: A reinforcement learning arena for training autonomous Kubernetes AI agents
Happy June, everybody!
blog.appliedcomputing.io
ACRL is turning 3, and drmorr is turning an age greater than 3!!! blog.appliedcomputing.io/p/acrl-is-tu...
ACRL is turning 3 (and also drmorr is turning an age greater than 3)
It is kind of wild to me that ACRL was founded 3 years ago; in June of 2023 I stepped out on this crazy adventure and I had no idea where it was going to go or how long it would last, but here we are,...
blog.appliedcomputing.io
This week's post is about all the ways that bare Kubernetes pods are weird. blog.appliedcomputing.io/p/bare-pods-... #kubernetes #k8s #simkube
Naked pods are Weird, Man
I’ve been doing some work with SimKube for a client recently and have run into a bunch of issues with SimKube fixed regarding its handling of bare Kubernetes pods.
blog.appliedcomputing.io
I have a quick post about all the ways that bare pods are weird in Kubernetes; currently available for paid subscribers, will open to free subscribers next week! blog.appliedcomputing.io/p/bare-pods-... #kubernetes #k8s #simkube
Bare pods are Weird, Man
I’ve been doing some work with SimKube for a client recently and have run into a bunch of issues with SimKube fixed regarding its handling of bare Kubernetes pods.
blog.appliedcomputing.io
Today's blog post is about all the techniques I can think of to mock Rust code: blog.appliedcomputing.io/p/all-the-wa... #rustlang #testing #software
All the ways to mock your Rust code
Ok, so, suppose you’ve written a Kubernetes controller, you did it in Rust, and then you realized that “Hey, when this thing breaks it’s hard to understand what’s going on”. So, you decide to emit som...
blog.appliedcomputing.io
In case you missed it, this is my SRECon recap, featuring all of my favorite talks! blog.appliedcomputing.io/p/srecon-202...
SRECon 2026 Recap
Last month I had the pleasure of going to SRECon 2026 Americas in Seattle; I realized that I posted the transcript of my talk but I didn’t actually do a recap of the conference itself, so I’m going to...
blog.appliedcomputing.io
It's new content Monday! My article about SKEL (the SimKube Expression Language) is now available and all you PLT nerds can check it out. blog.appliedcomputing.io/p/introducin... #simkube #kubernetes #plt
Introducing SKEL: The SimKube Expression Language
We just released SimKube 2.5.0, which as I said on Mastodon, feels like a big milestone for mainly “I like round numbers” reasons; but I think this is actually a pretty major release, as it’s the firs...
blog.appliedcomputing.io
This talk features my postmortem of the worst incident I've ever dealt with in production! Excited to get to finally check out the talk.
drmorr@drmorr.appliedcomputing.io · 3mo agoAre you bored on a Friday afternoon? My SRECon talk, "Stop Reading Changelogs: Safer Kubernetes Upgrades with Simulation" is now up on YouTube. Go watch it! Feels very timely since Kubernetes (checks notes) 1.36 was just released! www.youtube.com/watch?v=yk_P... #srecon #kubernetes #simkube
Simulation testing before upgrades beats changelog roulette every time, though honestly most teams still just wing it and hope the canary doesn't explode.
Are you bored on a Friday afternoon? My SRECon talk, "Stop Reading Changelogs: Safer Kubernetes Upgrades with Simulation" is now up on YouTube. Go watch it! Feels very timely since Kubernetes (checks notes) 1.36 was just released! www.youtube.com/watch?v=yk_P... #srecon #kubernetes #simkube
SREcon26 Americas - Stop Reading Changelogs: Safer Kubernetes Upgrades with Simulation
YouTube video by USENIX
youtube.com
This week's blog post is talking about some programming language design with SimKube.... I know there are some PLT nerds out there, don't make me @ you! Available to paid subscribers this week, free for everyone next week. blog.appliedcomputing.io/p/introducin... #simkube #skel #kubernetes #plt
Introducing SKEL: The SimKube Expression Language
We just released SimKube 2.5.0, which as I said on Mastodon, feels like a big milestone for mainly “I like round numbers” reasons; but I think this is actually a pretty major release, as it’s the firs...
blog.appliedcomputing.io
This week's blog post is from my coworker Ian, talking about ACRL's new offerings on the AWS Marketplace! blog.appliedcomputing.io/p/boy-ami-gl... #simkube #kubernetes #github #cicd
Boy AMI glad to see you
We’re pleased to announce that two AMIs (Amazon Machine Images) have joined the SimKube family!
blog.appliedcomputing.io
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
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…
events.linuxfoundation.org
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
Stop Reading Changelogs: Safer Kubernetes upgrades with simulation
SRECon 2026 Talk Transcript
blog.appliedcomputing.io
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
Stop Reading Changelogs: Safer Kubernetes upgrades with simulation
SRECon 2026 Talk Transcript
blog.appliedcomputing.io
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
github.com
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
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
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)
hachyderm.io
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
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)
hachyderm.io
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
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
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.
blog.appliedcomputing.io
The OOM metrics situation is genuinely frustrating. Half the time you're debugging memory issues with metrics that don't tell the actual story.
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
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 ...
blog.appliedcomputing.io
In today's blog post, I complain about version control systems. blog.appliedcomputing.io/p/frustratio... #git #jj #software
Frustrations with Version Control
Alright, it’s been a long time since I’ve posted a good rant on here, so buckle up buttercup.
blog.appliedcomputing.io
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...
Quick Update about the Blog
Hi friends!
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