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Learn Kubernetes weekly — issue #183 | Kube Today
Kube Today · 2026-05-13 · via Learn Kubernetes Weekly

Learn Kubernetes Weekly issue 183 · 13 May 2026

Autoscaling Hid Our LLM Cost Regression, Mount Mayhem at Netflix, DocumentDB Automatic Failover, Skew Protection, Kubernetes VM Security Model

This newsletter is brought to you by LearnKube — master Kubernetes with hands-on training designed for engineers who want to learn the smart way.

“What Kubernetes-specific behavior will affect my app when I deploy, update, scale, restart, route, evict, or secure it?”

Gulcan and I prepared a Kubernetes production-readiness checklist to help teams answer that question before going live.

It includes:

  1. An interactive checklist with a detailed breakdown
  2. A downloadable PDF worksheet
  3. A GitHub repository that you can fork and make yours.

Check out the Kubernetes production readiness checklist!

— Dan

Articles

  1. Mount mayhem at netflix: scaling containers on modern cpus

    netflixtechblog.com

    This article explains how Netflix traced severe container launch slowdowns to Linux mount lock contention, image layer mount storms, and CPU architecture differences while scaling containers on modern Kubernetes infrastructure.

  2. We brought Skew Protection to your Kubernetes

    blog.platformatic.dev

    This article explains how Kubernetes skew protection routes traffic based on app version to prevent frontend and backend mismatches during deployments, and version-aware routing using the Gateway API.

Tutorials

  1. CloudnativePG: postgres database the modern way

    medium.com

    This tutorial shows how to run highly available PostgreSQL on Kubernetes with CloudNativePG and Terraform by replacing the traditional Patroni, etcd, and HAProxy stack with a simpler operator-driven setup.

The Namespaces Scaling Trap

Most teams scale Kubernetes by thinking about pods and nodes. At Render, Brian Stack ran into a different dimension: hundreds of thousands of namespaces per cluster, multiplied across DaemonSets that list-watch every namespace.

Brian explains how Render traced the issue through Calico and Vector, worked with upstream maintainers, and turned memory profiling into operational wins: lower node costs, lighter API-server load, and faster rollouts.

In this interview:

  • Why namespaces can become a hidden scaling bottleneck
  • How DaemonSets multiply memory and control-plane pressure
  • How profiling, staging clusters, and upstream collaboration freed 7 TiB
  • Why pushing from an 80% fix to a complete fix can make teams faster

The Namespaces Scaling Trap

Kubernetes jobs

    • Software Architect with IntelliDyne Jobs for Veterans

    • Salary: $150K to $180K a year

    • Location: based in the office in Washington, DC, USA

    • Tech stack: Kubernetes, On-Prem, Kubernetes, Azure Government, AWS GovCloud, AWS, Azure, Docker, OpenShift, Audit Logging

    • System Administrator with Mattel Inc

    • Salary: $58.5K to $4.4L a year

    • Location: based in the office in Hyderabad, IN

    • Tech stack: Kubernetes, Kubernetes, AWS, Azure, OpenShift, alerting, monitoring, logging, Red Hat Insights, BigFix

    • Support Engineer with Mirantis

    • Salary: $45K to $176K a year

    • Location: remote from

    • Tech stack: Kubernetes, Kubernetes, Docker, Openstack, On-premise, Kibana, alert management, Grafana, Nagios, Prometheus

    • Support Engineer with Mirantis

    • Salary: $45K to $176K a year

    • Location: remote from

    • Tech stack: Kubernetes, Kubernetes, K0s, Mirantis Kubernetes Engine, Docker, Openstack, On-premise, Mirantis Opensack/k0s, MOSK, alert management

    • Platform Engineer with Mattel Inc

    • Salary: $1.25L to $3.74L a year

    • Location: based in the office in Hyderabad, IN

    • Tech stack: Kubernetes, Kubernetes, Google Cloud, AWS, Azure, OpenShift, Dynatrace, alerting, monitoring, logging

Discover more Kubernetes jobs on Kube Careers →

Code & tools

  1. ayaFlow

    github.com/DavidHavoc

    ayaFlow is an eBPF-based Rust tool that runs as a sidecarless DaemonSet to capture node-wide network traffic, expose metrics, and provide lightweight kernel-level visibility for troubleshooting and observability.

  2. Teleskopio

    github.com/teleskopio

    Teleskopio is a small, open-source Kubernetes web client that provides a clean browser interface for viewing and managing cluster resources without the weight of a full platform dashboard.

  3. Valkey cluster operator

    github.com/valkey-io

    Valkey Operator is a Kubernetes operator that automates deployment and lifecycle management of Valkey clusters and instances with features like automated installation and configuration management.

  4. Crossview: Crossplane UI

    github.com/corpobit

    Crossview is a React-based dashboard for managing and monitoring Crossplane resources in Kubernetes with features like:

    • resource visualization,
    • search capabilities,
    • SSO support,
    • and deployment via Helm or Kubernetes manifests.
  5. Kubeinvaders

    github.com/lucky-sideburn

    With k-inv, you can stress a Kubernetes cluster in a fun way and check its resilience by playing space invaders.

Other interesting projects:

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Kubernetes call for papers

  1. Cloud Native Days Norway

    The Call For Paper was open until 1 June 2026 at UTC. More info →
    • Location: Bergen, NO

    • In-person conference organized by CND Norway.

    • The conference starts on the 27 October 2026.

    • Apply here
  2. Dutch Cloud Native Day

    The Call For Paper is open until 22 June 2026 at UTC. More info →
    • Location: Utrecht, NL

    • In-person conference organized by Dutch CND.

    • The conference starts on the 29 October 2026.

    • Apply here
  3. Devopsdays Feira de Santana

    The Call For Paper was open until 4 June 2026 at UTC. More info →
    • Location: Feira de Santana, BR

    • In-person conference organized by Devopsdays.

    • The conference starts on the 6 June 2026.

    • Apply here
  4. Devopsdays Curitiba

    The Call For Paper was open until 4 June 2026 at UTC. More info →
    • Location: Curitiba, BR

    • In-person conference organized by Devopsdays.

    • The conference starts on the 22 August 2026.

    • Apply here
  5. Heapcon 2026

    The Call For Paper was open until 1 June 2026 at UTC. More info →
    • Location: Belgrade, RS

    • In-person conference organized by heapspace.

    • The conference starts on the 6 November 2026.

    • Apply here
  6. TechEx North America

    The Call For Paper was open until 17 May 2026 at UTC. More info →
    • Location: San Jose, CA, USA

    • In-person conference organized by TechEx Events.

    • The conference starts on the 19 May 2026.

    • Apply here
  7. DevOpsDays Istanbul 2026

    The Call For Paper was open until 31 May 2026 at UTC. More info →
    • Location: Istanbul, TR

    • In-person conference organized by DevOps Turkey.

    • The conference starts on the 29 September 2026.

    • Apply here

Thanks for reading.

See you next week!

— Gulcan

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