Learn Kubernetes Weekly issue 203 · 30 Sept 2026

Modelplane on Crossplane, Gateway API Replacing Ingress, Virtual Machines to GitOps, 500 MB Buffer Killed Archival, GPU MIG and Kueue for AI

This newsletter is brought to you by LearnKube — understand how Kubernetes works, and what to do when it breaks. Live training with 60% hands-on labs.

Going to KubeCon + CloudNativeCon North America? Come a day early. We are hosting our first in-person LearnKube community event!

Expect a hands-on workshop where you diagnose a broken app with an AI SRE agent, talks on cost optimization, bank grade Kubernetes, and AI operations, lightning talks, YAML Games, and drinks with the community.

Register for free here!

— Dan

Articles

1. Building Modelplane on Crossplane

   blog.crossplane.io

   This case study explains how Modelplane was built entirely as a Crossplane configuration, with no custom controllers, to turn GPUs spread across clouds into one fleet behind a stable inference API.

2. Kubernetes Gateway API: Why Ingress Is Being Replaced and Which Gateway Controller to Pick

   romaglushko.com

   This article explains why Ingress is being replaced by the Gateway API, what the new Gateway, Route and Policy resources actually do, and how to choose a gateway controller before migrating.

3. From Fragile VMs to Bulletproof GitOps: Modernizing a DevOps Platform on AWS EKS

   medium.com

   This case study shows how to migrate from fragile EC2-based infrastructure to AWS EKS with GitOps using ArgoCD, Jenkins, and SonarQube for a URL shortening platform, achieving 80% faster deployments and self-healing infrastructure.

4. How a 500 MB Buffer Killed Our Archival Job — And Why Streaming Fixed It

   dev.to

   This case study shows how a nightly export job kept getting OOM-killed on Kubernetes, and how switching to streaming dropped its memory use from 700 MB to about 30 MB.

5. How GPU MIG + Kueue Can Transform Multi-Tenant AI Workloads on Kubernetes

   yesdeepakverma.medium.com

   This article explains how slicing a big GPU with MIG and queueing jobs with Kueue lets several teams share the same card instead of one job sitting on all of it.

6. Scaling Kubernetes Deployments to multiple Regions: A GitOps Reference Architecture

   medium.com

   This article lays out a GitOps reference architecture for running one app across 25 regions, where every region reconciles itself with Argo CD and a rollback is a git revert scoped to that region alone.

Articles worth checking out:

• How I Built a Kubernetes Rightsizer in 4 Days During Easter Vacation — and Cut k8s Costs by 36%

• How we built our deployment pipeline: GitOps, ArgoCD, and Kubernetes at dodo payments

• We Proved Multi-Cluster Kafka Works on Kubernetes… Here’s Everything we Learned

• Your Kubernetes Backup Restored Successfully. So Why Is the App Broken?

• Zero-Day Runtime Isolation for Containers: Rethinking Dependency Trust

• Deep Dive into Kubernetes Secrets Store CSI Driver

• Your Kubernetes Cluster Is Probably Dropping Logs — Mine Was

Tutorials

1. Scale Kubernetes deployments to zero using KEDA

   mijndertstuij.nl

   This tutorial shows how to put dev, QA and staging clusters to sleep overnight with KEDA's cron scaler, including the Argo CD gotchas around CRDs, RoleBindings and replica drift.

2. Your Docker Secrets Are Not Gone — They’re Just Hidden

   medium.com

   This tutorial builds a Docker image with a secret, then shows how it still sits in an earlier image layer after you delete it, and pulls it back out with docker history, jq and tar.

3. Your Kubernetes Cluster Already Has a Certificate Authority — Use It for Everything

   medium.com

   This tutorial shows how to let cert-manager issue Let's Encrypt certificates for services outside the cluster, using DNS-01 validation and AWS Secrets Manager as the delivery path to an OpenVPN server.

Kubernetes jobs

1. • Software Engineer with Monzo

   • Salary: £42.5K a year

   • Location: based in the office (and remote from home) in London, GB

   • Tech stack: Kubernetes, Kubernetes, AWS, Docker, GCP, compliance, AWS IAM, security, Kafka, Cassandra

2. • Platform Engineer with Zeta Global

   • Salary: $165K to $185K a year

   • Location: based in the office (and remote from home) in San Mateo, CA, USA

   • Tech stack: Kubernetes, Kubernetes, AWS EC2, AWS, alerting, monitoring, incident response, observability, Terraform, IAM

3. • DevSecOps Engineer with Harness

   • Salary: $54K to $440K a year

   • Location: remote from

   • Tech stack: Kubernetes, Kubernetes, AWS, Azure, Docker, GCP, GitHub, Harness, GitHub Actions, Jenkins

4. • DevSecOps Engineer with Harness

   • Salary: $54K to $258.72K a year

   • Location: remote from

   • Tech stack: Kubernetes, Kubernetes, AWS EC2, AWS, GCP, alerting, monitoring, logging, ingress controllers, GitOps

5. • DevSecOps Engineer with Harness

   • Salary: $150K to $164K a year

   • Location: remote from

   • Tech stack: Kubernetes, Kubernetes, AWS, GCP, HIPAA, DLP, SOC 2, SBOM, SLSA, ISO 27001

Discover more Kubernetes jobs on Kube Careers →

Code & tools

1. infra-bench: Benchmark for AI agents on infrastructure work

   github.com/kubeply

   infra-bench is an open benchmark suite that measures how well AI agents handle real infrastructure tasks, starting with a Kubernetes dataset of easy, medium and hard problems.

2. crd-schema-publisher: CRD docs and IDE validation

   github.com/sholdee

   crd-schema-publisher pulls CRD schemas straight from your own cluster and publishes them as a searchable docs site plus JSON schemas your editor can use to validate manifests.

3. Freelens Pod File Browser: browse pod files from the UI

   github.com/masoudei

   Freelens Pod File Browser adds a graphical file browser to Freelens, so you can open, edit, upload and download files inside a pod container instead of running kubectl exec over and over.

4. Auto-Restart Workloads on ConfigMap and Secret Changes

   github.com/stakater

   Reloader is a Kubernetes controller that watches Secrets and ConfigMaps and triggers rolling updates on Deployments, StatefulSets, and more when changes are detected.

5. Kubex: async Kubernetes client for Python

   github.com/codemageddon

   Kubex is a fully typed, async Kubernetes client for Python built on Pydantic, and its benchmarks show it listing pods tens of times faster and with far less memory than kubernetes-asyncio.

Other interesting projects:

• ctlptl: Declarative Local Kubernetes Cluster Manager

• Multikube - one entry point for many Kubernetes clusters

Upcoming Kubernetes events

1. Oct

   1

   DevSecOps 2026

   Online conference organized by Conf42.

   • This is a virtual event

   • This is a free event.

2. Oct

   2

   The Cloud & AI Summit 2026

   In-person conference organized by The Cloud and AI Summit.

   • Location: St. Louis, MO, USA

   • This event requires an entrance fee

3. Oct

   2

   MLCon NYC 2026

   In-person conference organized by Devmio.

   • Location: New York, NY, USA

   • This event requires an entrance fee

4. Oct

   5

   Advanced Kubernetes course (Amsterdam)

   In-person workshop organized by LearnKube.

   • Location: Amsterdam, NL

   • This event requires an entrance fee

5. Oct

   5

   Advanced Kubernetes course (Boston)

   In-person workshop organized by LearnKube.

   • Location: Boston, MA, USA

   • This event requires an entrance fee

6. Oct

   22

   Advanced Kubernetes course

   Online workshop organized by LearnKube.

   • This is a virtual event

   • This event requires an entrance fee

Discover more Kubernetes events on Kube Events →

Kubernetes call for papers

1. 12

   days

   KubeCon + CloudNativeCon Europe 2027

   The Call For Paper is open until 12 October 2026 at UTC. More info →

   • Location: Barcelona, ES

   • In-person conference organized by CNCF.

   • The conference starts on the 18 March 2027.

   • Apply here

2. 19

   days

   Cloud Native Days LA

   The Call For Paper is open until 19 October 2026 at UTC. More info →

   • Location: Los Angeles, CA, USA

   • In-person conference organized by SCaLE.

   • The conference starts on the 1 April 2027.

   • Apply here

3. 0

   days

   UbuCon India 2026

   The Call For Paper is open until 30 September 2026 at UTC. More info →

   • Location: Bengaluru, IN

   • In-person conference organized by Canonical.

   • The conference starts on the 15 November 2026.

   • Apply here

4. 54

   days

   Big Data Europe

   The Call For Paper is open until 23 November 2026 at UTC. More info →

   • Location: Vilnius, LT

   • In-person conference organized by DATA MINER.

   • The conference starts on the 27 November 2026.

   • Apply here

5. 19

   days

   Cloud Native AI + Inference Day Europe

   The Call For Paper is open until 19 October 2026 at UTC. More info →

   • Location: Barcelona, ES

   • In-person conference organized by CNCF.

   • The conference starts on the 15 March 2027.

   • Apply here

6. 32

   days

   Devopsdays Los Angeles

   The Call For Paper is open until 1 November 2026 at UTC. More info →

   • Location: Los Angeles, CA, USA

   • In-person conference organized by DevopsDays.

   • The conference starts on the 2 April 2027.

   • Apply here

7. 15

   days

   Global Summit on Data Science and Cloud Computing

   The Call For Paper is open until 15 October 2026 at UTC. More info →

   • Location: Rome, IT

   • In-person conference organized by Noveltics Group.

   • The conference starts on the 20 October 2026.

   • Apply here

8. 1

   days

   SREday Amsterdam 2026

   The Call For Paper is open until 1 October 2026 at UTC. More info →

   • Location: Amsterdam, NL

   • In-person conference organized by SREDay.

   • The conference starts on the 2 November 2026.

   • Apply here

9. 9

   days

   NextGen Intelligence Conference: Data, Cloud & AI

   The Call For Paper is open until 9 October 2026 at UTC. More info →

   • Location: London, GB

   • In-person conference organized by TechAI.

   • The conference starts on the 17 November 2026.

   • Apply here

Until next time!

— Gulcan