Learn Kubernetes weekly — issue 24

26 Apr 2023

  1. etcd: getting 30% more write/s

    Sam Lockart

    In this article, the team at Zendesk analyzed the performance of their self-managed etcd clusters and found that upgrading to GP3 volumes increased write performance by 30%.

  2. Learn why you can't ping a Kubernetes service

    Daniele Polencic

    Have you ever tried to ping a Service IP address in Kubernetes?

    You might have noticed that it doesn't work.

    In this article, you will learn how ClusterIP services and kube-proxy work in Kubernetes.

  3. Where is my SIGTERM, Docker?

    Lucas Pinheiro

    In this article, you will learn how to correctly set up your containers to forward the SIGTERM signal to the main process.

    This is crucial for gracefully shutting down apps in Kubernetes.

  4. Protecting Kubernetes apps from SQL injection & XSS attacks

    Ali Naqvi

    In this tutorial, you will deploy a vulnerable app to SQL and XSS injections in Kubernetes and learn how to protect it using Pipy and sidecar containers.

  5. Most useful kubectl plugins

    Shardul Srivastava

    In this article, you will have a look at the following kubectl plugins:

    1. neat.
    2. view-secret.
    3. access-matrix.
    4. blame.
    5. df-pv.
    6. gke-outdated.
  6. Protect your mission-critical pods from eviction with PriorityClass

    Sunny Bhambhani

    Pod priority and preemption help ensure that mission-critical pods are up in the event of a resource crunch by deciding the order of scheduling and eviction.

    Learn more in this article.

Articles worth checking out:

  1. Deploying Prometheus and Grafana in a multi-node Kubernetes cluster and auto-scaling with KEDA

    Ritik Agrawal

    In this tutorial, you'll learn how to deploy Prometheus and Grafana on Kubernetes.

    Then you'll deploy an application that can publish custom metrics to Prometheus.

    And finally, you'll use KEDA to auto-scale based on these metrics.

  2. Creating a Kubernetes cluster on Hetzner Cloud with Hetzner CCM, Rancher, Traefik and Cloudflare

    Alper Cicek

    This tutorial will walk you through setting up a Kubernetes cluster on Hetzner Cloud using RKE2.

    You'll create the nodes, install and configure Hetzner's Cloud Controller Manager, and enable native load-balancing features.

  3. Terraform Kubernetes integration with minikube

    Eranga Herath

    In this (unusual) tutorial, you will use Terraform to create resources (e.g. deployments, namespaces) in a minikube cluster using HCL.

    • DevOps Engineer with Abacus Works

    • Salary: £116.54K to £180.84K a year

    • Location: based in the office (and remote from home) in Remote-Hybrid (London)

    • Tech stack: Kubernetes, GCP, AWS, Typescript

    • Data Engineer with Nansen

    • Salary: SGD 84K to SGD 180K a year

    • Location: fully remote

    • Tech stack: Kubernetes, Python, SQL

    • Site Reliability Engineer with DexCare

    • Salary: $140K to $175K a year

    • Location: remote from the United States

    • Tech stack: Kubernetes, Azure, AWS, Gitlab, Jenkins

Discover more Kubernetes jobs on Kube Careers →

  1. planetlabs/draino

    Draino automatically drains Kubernetes nodes based on labels and node conditions.

    Nodes that match all of the supplied labels and any of the supplied node conditions will be cordoned immediately and drained after a configurable drain-buffer time.

  2. praqma/helmsman

    Helmsman is a Helm Charts as Code tool which allows you to automate the deployment/management of your Helm charts from version-controlled code.

  3. googlecontainertools/skaffold

    Skaffold is a command line tool that facilitates continuous development for Kubernetes applications.

    You can iterate on your application source code locally and then deploy to local or remote Kubernetes clusters.

  4. alecjacobs5401/kubectl-sick-pods

    Kubectl plugins for diagnosing pods that are "Not Ready" (that have failing Pod Conditions or containers).

    This plugin also supports the standard Pod selection arguments and one or multiple pod names to explicitly diagnose.

  5. nabsul/k8s-ecr-login-renew

    k8s-ecr-login-renew renews Docker login credentials for an AWS ECR container registry.

    It deploys as a cron job and ensures that your Kubernetes cluster can always pull Docker images from ECR.

Other interesting projects:

Upcoming Kubernetes events

  1. Apr


    Getting started with Kubernetes on AWS

    Online workshop organized by Pulumi.

    • This is a virtual event

    • This is a free event.

  2. Apr


    Kubernetes blue/green deployments in an event based architecture

    Online & in-person meetup organized by Athens SDET Meetup Group.

    • Location: Elliniko, GR and virtual

    • This is a free event.

  3. Apr


    Service mesh is a VPN!!!

    In-person meetup organized by Columbus Cloud Native Meetup.

    • Location: Columbus, US

    • This is a free event.

  4. Apr


    Auto-renew certs in AKS with cert-manager

    Online meetup organized by Nashua CLOUD .NET User Group.

    • This is a virtual event

    • This is a free event.

  5. May


    Bootiful Kubernetes operators

    In-person meetup organized by Athens Kubernetes Meetup.

    • Location: Athina, GR

    • This is a free event.

  6. May


    WTF is SRE?

    In-person conference organized by Container Solutions.

    • Location: London, UK

    • This is a free event.

  7. May


    Devoxx Greece

    In-person conference organized by Softconf.

    • Location: Athens, GR

    • This event requires an entrance fee

  8. May


    Devoxx UK 2023

    In-person conference organized by Devoxx UK.

    • Location: London, UK

    • This event requires an entrance fee

  9. May


    Craft conference

    In-person conference organized by Craft.

    • Location: Budapest, HU

    • This event requires an entrance fee

Discover more Kubernetes events on Kube Events →

Kubernetes Call for Papers

  1. expired


    The Call For Paper was open until 26 April 2023 at UTC. More info →
    • Location: Bucharest, RO

    • In-person conference organized by DevTalks.

    • The conference starts on the 21 June 2023.

    • Apply here
  2. expired

    Kubernetes Community Days Munich 2023

    The Call For Paper was open until 30 April 2023 at UTC. More info →
    • Location: Munich, DE

    • In-person conference organized by KCD Munich.

    • The conference starts on the 17 July 2023.

    • Apply here
  3. expired

    Open source summit Europe

    The Call For Paper was open until 3 May 2023 at UTC. More info →
    • Location: Bilbao, ES and virtual

    • Online & in-person conference organized by Linux Foundation.

    • The conference starts on the 19 September 2023.

    • Apply here

Until next time!

— Dan

Subscribe and, every Wednesday, receive the latest Kubernetes news!

Or follow us on: