Learn Kubernetes Weekly issue 149
More DevOps Than I Bargained for, MariaDB Cluster on a $150 cluster, Ceph on NVMe, Egress with Istio, Break out of the Python Sandbox
17 Sept 2025
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Articles
More devops than I bargained for
Amos Wenger
A simple server migration from x86 to ARM64 spiraled into a full Kubernetes debugging saga.
That familiar 'this should be simple' turning into 'why am I debugging IPv6 routing at 4 AM?' experience.
Is It Time to Migrate? A Practical Look at Kubernetes Ingress vs. Gateway API
Tired of brittle Ingress setups? Learn how the Envoy-based Calico Ingress Gateway (v3.30) leverages the Kubernetes Gateway API for standardized, secure, TLS-automated ingress, eliminating vendor-specific annotations.
sponsored
Testing to See if You Can Run a MariaDB Cluster on a $150 Kubernetes Lab
Alejandro Duarte
This article experiments with running a MariaDB Galera cluster on a $150 Kubernetes lab built from Orange Pi boards.
It details installing K3s, deploying the MariaDB Kubernetes Operator, tuning resource limits for small SBCs.
Ceph on NVMe Made No Sense to Us—So We Built a 40x Better Alternative
Chris Engelbert
This article benchmarks Simplyblock vs Ceph on NVMe infrastructure, showing that Simplyblock delivers over 4× higher IOPS with only ~25% of Ceph’s NVMe drives.
Observing Egress Traffic with Istio
Kai Burjack
This article explains how to configure Istio to observe encrypted and unencrypted egress traffic in Kubernetes using TLS termination, origination, and certificate management.
Trying to break out of the Python REPL sandbox in a Kubernetes environment: a practical journey
Nazarii Zavada
This article demonstrates a breakout of the Python REPL sandbox in Kubernetes, bypassing container restrictions by leveraging object subclasses and global functions.
Articles worth checking out:
Secure Kubernetes Traffic the Easy Way
No more vendor-specific annotations!
Discover how Calico Ingress Gateway brings consistency, automation, and stronger security to Kubernetes ingress.
Tutorials
A Hands-on Guide to Kubernetes Observability with Whisker
In this interactive lab, you will learn how to quickly spot network policy issues and troubleshoot easily, using Whisker, an open source observability tool.
sponsored
AI-Assisted GitOps with Flux MCP Server
Stefan Prodan
This tutorial teaches how to use the Flux MCP Server to connect AI assistants to Kubernetes, using natural language to manage and troubleshoot GitOps pipelines.
Mastering Kubernetes StatefulSets: Expanding PVCs Without Downtime or GitOps Drift
Trayan Simeonov
This tutorial teaches how to expand PVCs for StatefulSets without downtime and resolve ArgoCD sync errors by manually editing PVCs and using cascade orphan deletion.
Cost-optimized ml on production: autoscaling GPU nodes on Kubernetes to zero using keda
CodeLink
This tutorial teaches how to reduce ML deployment costs using Kubernetes and KEDA to autoscale GPU nodes from zero based on message queue length.
Kubernetes jobs
🔥 Platform Engineer with Informatik Aargau
Salary: CHF 103.48K to CHF 144.87K a year
Location: based in the office (and remote from home) in Switzerland
Tech stack: Kubernetes, Terraform, Gitlab, Grafana, Prometheus, Loki
🔥 Software Engineer with Sumo Logic
Salary: ₹41L to ₹62L a year
Location: based in the office (and remote from home) in Delhi / Noida / Bangalore
Tech stack: Kubernetes, Helm, Docker, Go, Java, Scala, C++, Terraform, GitHub Actions, OTEL
Site Reliability Engineer with Multi Media LLC
Salary: $161K to $180K a year
Location: remote from the United States
Tech stack: Kubernetes, Data center, Helm, ArgoCD, Docker, Go, Shell, Python, Java, Rust
Platform Engineer with Defense Unicorns
Salary: $148.75K to $201.25K a year
Location: remote from the United States
Tech stack: Kubernetes, Bare-metal, AWS, Azure, GCP, On-premise, Kustomize, Helm, Go, Shell
DevOps Engineer with Veri MedTech Holdings
Salary: $80K to $90K a year
Location: based in the office (and remote from home) in Denver, CO, USA
Tech stack: Kubernetes, AWS, Azure, GCP, Docker, PHP, MySQL, Terraform, Cloudformation, Jenkins
Discover more Kubernetes jobs on Kube Careers →
Code & tools
HAMi – Heterogeneous AI Computing Virtualization Middleware
Project-HAMi
HAMi enables sharing and isolation of heterogeneous AI computing devices (GPU, NPU, MLU, etc.) in Kubernetes.
It provides device virtualization, topology-aware scheduling, and resource isolation via a unified Kubernetes-native middleware.
CRIU: Checkpoint and Restore in Userspace for Linux Processes
checkpoint-restore
CRIU allows freezing and restoring live Linux processes or containers by dumping their runtime state to disk and rehydrating them later.
It supports socket state, memory, file descriptors, and namespaces and integrates with Docker, LXC, and OpenVZ.
Awesome Kubernetes Architecture Diagrams – Tools and Frameworks for Visualizing K8s
philippemerle
This repo contains 20+ tools that auto-generate Kubernetes architecture diagrams from manifests, Helm charts, or cluster state.
Smesh: Lightweight Kubernetes-Integrated Sidecar Mesh Without Proxies
thebsdbox
smesh is a proof-of-concept service mesh for Kubernetes that utilizes eBPF to intercept and redirect pod traffic to a sidecar proxy.
feiskyer
kube-copilot diagnoses pod issues and audits pod security with Trivy.
It generates manifests from prompts, analyzes resource health, and executes kubectl tasks via LLMs.
Other interesting projects:
Upcoming Kubernetes events
Sept
18
Kubernetes Community Days Sofia 2025
In-person conference organized by KCD Sofia.
Location: Sofia, BG
This event requires an entrance fee
Sept
18
Online workshop organized by Learnk8s.
This is a virtual event
This event requires an entrance fee
Sept
20
Kubernetes Community Days El Salvador
In-person conference organized by KCD El Salvador.
Location: San Salvador, SV
This event requires an entrance fee
Use KUBE10 to get 10% off
Sept
23
Sept
17
JVM, Kubernetes and High Load: A Criminal Case
In-person meetup organized by tech&talk Frankfurt.
Location: Frankfurt am Main, DE
This is a free event.
Discover more Kubernetes events on Kube Events →
Kubernetes Call for Papers
17
days
KubeCon + CloudNativeCon Europe 2026
The Call For Paper is open until 12 October 2025 at UTC. More info →
Location: Amsterdam, NL
In-person conference organized by Linux Foundation.
The conference starts on the 23 March 2026.
- Apply here
expired
KCD Hangzhou + OpenInfra China Day 2025
The Call For Paper was open until 21 September 2025 at UTC. More info →
Location: Hangzhou, CN
In-person conference organized by KCD Hangzhou.
The conference starts on the 15 November 2025.
- Apply here
38
days
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
6
days
The Call For Paper is open until 1 October 2025 at UTC. More info →
Location: Wollongong, AU
In-person conference organized by Devopsdays.
The conference starts on the 26 November 2025.
- Apply here
35
days
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
5
days
The Call For Paper is open until 30 September 2025 at UTC. More info →
Location: Recife, BR
In-person conference organized by Devopsdays.
The conference starts on the 13 December 2025.
- Apply here
expired
The Call For Paper was open until 20 September 2025 at UTC. More info →
Location: Garanhuns, BR
In-person conference organized by Devopsdays.
The conference starts on the 20 October 2025.
- Apply here
expired
The Call For Paper was open until 20 September 2025 at UTC. More info →
Location: Nairobi, KE
In-person conference organized by Africa DevOps Summit.
The conference starts on the 1 November 2025.
- Apply here
4
days
The Call For Paper is open until 30 September 2025 at UTC. More info →
Location: Florianópolis, BR
In-person conference organized by Devopsdays.
The conference starts on the 6 December 2025.
- Apply here
Until next time!
— Dan
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