Learn Kubernetes weekly — issue 10

18 Jan 2023

Articles

Kubernetes failure stories
Henning Jacobs
A compiled list of links to public failure stories related to Kubernetes.
Comparing resource consumption in k0s vs k3s vs MicroK8s
Neil Cresswell
This article compares K0S, K3S, and MicroK8s, and the resources required for each.
Backup-and-restore of containers with Kubernetes checkpointing API
Martin Heinz
Kubernetes v1.25 introduced Container Checkpointing API — a way to backup-and-restore containers running in Pods, without stopping them.
In this article, you'll take a look at it and learn how to leverage it for backup-and-restore or forensic analysis.
Design patterns for extensible controllers
Zoltan Magyar
This article aims to showcase some examples of how to design extensible controllers and operators for Kubernetes.
Pitfalls reloading files from Kubernetes secret & ConfigMap volumes
Ahmet Alp Balkan
Files on Kubernetes Secret and ConfigMap volumes work in peculiar and undocumented ways when watching changes to these files with the inotify syscall.
Your typical file watch that works outside Kubernetes might not work as you expect.
Why you should avoid Sealed Secrets in your GitOps deployment
Denilson Nastacio
In this article, you will discuss the pitfalls and alternatives of Sealed Secrets as you move your deployments to production using GitOps.

About my PDF-Editor project
Dipankar Das
In this tutorial, you will follow Dipankar's journey in building a web-based PDF editor using modern web technology and infrastructure.
Dipankar linked all the online resources that he used to learn those technologies while building the project.
Creating a simple web app to list Kubernetes resources
Shay Ulmer
In this tutorial, you'll learn how to build a simple app that lists resources on the Kubernetes cluster it runs on.
In the process, you will also learn how to utilize Service Accounts, RBAC, the Python client, Ingress and more.
Cilium CNI on EKS using secondary CIDR and prefix delegation
Benoit Mouquet
In this tutorial, you will learn how the Cilium CNI can be deployed on EKS using Terraform and how to use it for VPC secondary CIDR and prefix delegation.
GKE with NGINX service mesh
Joaquín Menchaca (智裕)
This tutorial has 2 parts:
1. NSM (NGINX Service Mesh) for east-west traffic to secure traffic between services in the cluster.
2. NGINX-Plus Ingress Controller for north-south traffic to secure incoming traffic.
More: https://joachim8675309.medium.com/gke-with-nginx-service-mesh-8b1073af07bf

- Software Engineer with Coinrule
- Salary: £25K to £45K a year
- Location: fully remote
- Tech stack: Kubernetes, AWS
- Site Reliability Engineer with GoGuardian
- Salary: $170K to $200K a year
- Location: remote from the United States
- Tech stack: Kubernetes, Docker, Python, Terraform, Gitlab, Jenkins, Chef, Ansible, Puppet
- DevOps Engineer with Scandio
- Salary: €45K to €70K a year
- Location: based in the office in München, Germany
- Tech stack: Kubernetes, AWS, Azure, ArgoCD, Terraform

aws-samples/eks-multi-cluster-gitops
This repo contains the implementation of a multi-cluster GitOps system on EKS.
jkosik/helm-decomposer
helm-decomposer decomposes Helm packages and visualizes the hierarchy of subcharts and images.
actions-runner-controller/actions-runner-controller
Actions Runner Controller (ARC) is a Kubernetes controller for GitHub Actions self-hosted runners.
With ARC, you can:
- Deploy self-hosted runners on Kubernetes clusters with a simple set of commands.
- Auto scale runners based on demand.
crumbhole/argocd-lovely-plugin
This plugin extends ArgoCD with:
- Composing multiple things together to form a single app from multiple directories.
- Helm + Kustomize just work.
- You can chain several plugins together.
- When used with application sets, you can apply Kustomizations.
erjadi/kubecraftadmin
KubeCraftAdmin: this project allows you to do basic Kubernetes administration through Minecraft.

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