Learn Kubernetes Weekly issue 154 · 22 Oct 2025

Troubleshooting Packet Drops, Breaking EKS Autoscaler on AL2023, Multi-Cluster Resources, kube-proxy to eBPF, Diagnosing API Server Logs

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Articles

1. Troubleshooting packet drops in a Kubernetes-based observability platform

   medium.com

   In this case study, you will learn how the SRE team at Kapital Bank meticulously analyzed network kernel issues on a Kubernetes-based Memcached platform, uncovering and resolving intermittent performance problems through kernel parameter tuning.

2. We Broke Our EKS Cluster Autoscaler During Amazon AL2023 Migration (and Fixed It)— Here’s What We Learned

   dilshanw.medium.com

   This case study describes how the author’s EKS cluster autoscaler broke after migrating to Amazon’s AL2023 image and how they resolved it by switching to IRSA (IAM Roles for Service Accounts) and adjusting permissions.

3. Managing Kubernetes Resources Across Multiple Clusters

   medium.com

   This case study shows how to implement a multi-cluster reconciler to manage Kubernetes resources across sharded clusters for fault tolerance.

   It covers sharding stateless workloads across 3 clusters to limit the impact of infrastructure failures.

4. From kube-proxy to eBPF (Cilium)

   medium.com

   This article compares kube-proxy’s user-space model with Cilium’s eBPF-powered kernel routing, demonstrating how Cilium offers lower latency and better scalability.

5. Kubernetes Logs Unavailable Behind a Proxy: Diagnosing API Server Communication Issues

   medium.com

   This article shows why kubectl logs might fail when your cluster sits behind an HTTP proxy and you forget to set NO_PROXY for internal addresses.

6. Production-Grade Pain: Lessons From Scaling Kubernetes on EKS

   engineering.probo.in

   This article walks through real challenges the team faced while scaling EKS — from autoscaling, ingress, DNS tuning to graceful shutdowns — and shares how they tackled each layer.

Articles worth checking out:

• Autoscaling .NET APIs with KEDA and Kubernetes Metrics

• Nginx Ingress Controller Upgrade

• Enterprise Secret Management in MLOps: Kubernetes Security at Scale

• Kubernetes On-Premise Service of type LoadBalancer with L2 / BGP

Tutorials

1. Building DC-DR Kubernetes Clusters with Karmada for Reliability and Seamless Failover

   medium.com

   This tutorial shows how to set up geographically redundant Kubernetes clusters (DC + DR) using Karmada to achieve high availability, failover, and consistent deployment across clusters.

2. Exposing Kubernetes Services Without Cloud LoadBalancers: A Practical Guide

   medium.com

   This tutorial explains how to expose Kubernetes services without relying on cloud LoadBalancer support, using MetalLB + NGINX Ingress to provide stable IPs and path-based routing on bare-metal/air-gapped clusters.

Kubernetes jobs

1. • Software Engineer with Upgrade

   • Salary: CA$150K to CA$250K a year

   • Location: remote from Canada

   • Tech stack: Kubernetes, Go, Java

2. • Platform Engineer with Camunda

   • Salary: £149.8K to £247K a year

   • Location: remote from the United States of America, Brazil, Canada

   • Tech stack: Kubernetes, AWS, Azure, GCP, Docker, Go, Shell, Python, Terraform, Cloudformation

3. • Platform Engineer with Speechify

   • Salary: $140K to $200K a year

   • Location: based in the office in Corona, CA, USA

   • Tech stack: Kubernetes, AWS, Azure, GCP, Docker, Javascript

4. • Site Reliability Engineer with Lambda

   • Salary: €146K to €310K a year

   • Location: remote from Germany, the Netherlands, the United Kingdom

   • Tech stack: Kubernetes, AWS, GCP, On-premise, Bare-metal, Data center, Helm, ArgoCD, Go, Python

5. • Platform Engineer with Speechify

   • Salary: $140K to $200K a year

   • Location: based in the office in Torrance, CA, USA

   • Tech stack: Kubernetes, AWS, Azure, GCP, Docker, Javascript

Discover more Kubernetes jobs on Kube Careers →

Code & tools

1. emberstack/kubernetes-reflector

   github.com/emberstack

   Reflector is a Kubernetes addon designed to monitor changes to resources (secrets and configmaps) and reflect changes to mirror resources in the same or other namespaces.

2. xdatabase-proxy – Kubernetes-Aware DB Proxy Service

   github.com/hasirciogli

   This is a high-performance database proxy built in Go for Kubernetes environments, offering TLS termination, dynamic routing based on Kubernetes labels, and lightweight connection management.

3. k10ls — native K8s API port-forwarder

   github.com/besrabasant

   This tool enables automation-friendly, label-aware port forwarding for pods and services using the Kubernetes API, without relying on kubectl port-forward.

4. Volare: Kubernetes Volume Populator

   github.com/AdamShannag

   Volare provides a Kubernetes volume populator that fills PersistentVolumeClaims with data from external sources such as S3 or HTTP servers before pods start using them.

5. kgateway

   github.com/kgateway-dev

   Kgateway is a Kubernetes-native ingress controller and API gateway built on Envoy and Gateway API.

   It handles north-south traffic routing, API management with auth/rate limiting, AI/LLM gateway functions, and hybrid app migration.

Other interesting projects:

• NGINX Gateway Fabric

• KEDA HTTP Add-on: scale on requests

• flux2-kustomize-helm-example

• cnquery: Native Query Tool

• Kubernetes RBAC authorizing HTTP proxy

• Proxmox Kubernetes Engine

• uber/kraken

Upcoming Kubernetes events

1. Oct

   25

   Cloud Native Day São Paulo 2025

   In-person conference organized by Cloud Native São Paulo City.

   • Location: São Paulo, BR

   • This event requires an entrance fee

2. Oct

   26

   Kubernetes Community Days Sri Lanka 2025

   In-person conference organized by KCD Sri Lanka.

   • Location: Colombo, LK

   • This event requires an entrance fee

3. Oct

   27

   Advanced Kubernetes course (San Francisco)

   In-person workshop organized by Learnk8s.

   • Location: San Francisco, CA, USA

   • This event requires an entrance fee

4. Oct

   28

   Cloud Native Bergen 2025

   In-person conference organized by Cloud Native Bergen.

   • Location: Bergen, NO

   • This event requires an entrance fee

5. Oct

   29

   Bypassing Kubernetes Security

   In-person meetup organized by Cloud Native Aachen.

   • Location: Aachen, DE

   • This is a free event.

6. Nov

   5

   Tech Show Paris 2025

   In-person conference organized by CloserStill.

   • Location: Paris, FR

   • This is a free event.

Discover more Kubernetes events on Kube Events →

Kubernetes call for papers

1. 15

   days

   Cloud Native Latam Summit

   The Call For Paper is open until 10 November 2025 at UTC. More info →

   • This is a virtual event

   • Online conference organized by Cloud Native LATAM.

   • The conference starts on the 27 November 2025.

   • Apply here

2. 8

   days

   KyvernoCon EU 2026

   The Call For Paper is open until 3 November 2025 at UTC. More info →

   • Location: Amsterdam, NL

   • In-person conference organized by Nirmata.

   • The conference starts on the 23 March 2026.

   • Apply here

3. 7

   days

   Devopsdays Los Angeles

   The Call For Paper is open until 2 November 2025 at UTC. More info →

   • Location: Los Angeles, CA, USA

   • In-person conference organized by Devopsdays.

   • The conference starts on the 7 March 2025.

   • Apply here

4. 5

   days

   Devopsdays Porto Alegre

   The Call For Paper is open until 31 October 2025 at UTC. More info →

   • Location: Porto Alegre, BR

   • In-person conference organized by Devopsdays.

   • The conference starts on the 29 November 2025.

   • Apply here

Until next time!

— Gulcan