Learn Kubernetes weekly β€” issue 35

12 Jul 2023

  1. How do we mitigate memory leak in Kubernetes with a one-liner commit

    Muhammet Ozekli

    The Trendyol team noticed that the primary gateway API returned 503 errors after 18:00 at weekends β€” when the RPMs are higher (~100 Million rpm as daily peak).

    In this post-mortem, you'll follow their journey as they identified and fixed the issue.

  2. Tracing the path of network traffic in Kubernetes

    Kristijan Mitevski

    In this article, you will learn how packets flow inside and outside a Kubernetes cluster: starting from the initial web request to the application's container.

  3. Writing Kubernetes manifests with kustomize feeder repository

    Christopher Lane

    In this case study, you'll learn how the team at Chick-fil-A uses Kustomize and a "feeder repository" to lower the barrier to entry for app teams.

    Developers can pull in predefined manifests and "patch-in" any changes for their particular application.

  4. My first experience with Kyverno: 🀯🀩

    Mathieu Benoit

    Kyverno is a Kubernetes policy engine that can enforce policies like required labels, container image signing, resource existence, etc.

    It has a library of ready-to-use policies and allows for easy evaluation with its CLI.

    Learn more in this post.

  5. Scaling video encoding with Node.js and Kubernetes

    Patrick Kalkman

    The article explains how the default Kubernetes autoscaling isn't always the best choice.

    The team adopted the Horizontal Pod Autoscaler to scale workloads for encoding videos but found themselves switching to a custom autoscaler.

  6. OWASP Kubernetes top 10

    Nigel Douglas

    OWASP Kubernetes is aimed at helping security practitioners, sysadmins, and software developers prioritize risks around the Kubernetes ecosystem.

    In this article, you will find the top 10 risks you should consider and mitigations you could adopt.

Articles worth checking out:

⎈ Become an expert in Kubernetes: Advanced Kubernetes course

Learnk8s

Join Learnk8s' 4-day Advanced Kubernetes workshop this September (online or in London, UK).

Get your hands dirty with Kubernetes and learn what makes Kubernetes tick in a session packed with hands-on labs!

⎈ Become an expert in Kubernetes: Advanced Kubernetes course
  1. Desktop client for Kubernetes: Aptakube

    Aptakube

    Aptakube is a fast, lightweight and modern GUI for Kubernetes.

    Avoid context switching by connecting to multiple clusters simultaneously! Metrics, Aggregated Log Viewer, Quick Actions, YAML Editor, and more β€” all sleekly bundled into a compact app!

    sponsored

  2. Trying out the new in-place Pod Resource Resizing!

    Karla Saur

    The new in-place Pod Resource Resizing feature enables you to automatically resize a pod's CPU, memory limits, and requests without restarting it.

    Learn how it works in this tutorial.

  3. Multi-Cluster observability

    Robusta.dev

    Do dozens of clusters mean dozens of Prometheus alerts?

    Connect Robusta and make sense of all your existing alerts and clusters in a single pane of glass.

    sponsored

  4. Kubernetes cluster with OCI free-tier and Raspberry Pi4

    ȘtefΔƒnescu Liviu

    In this 4-part series, you'll learn how to build a Kubernetes cluster (using K3s) with 4x OCI free-tier ARM instances and 4x Raspberry Pi 4.

  5. AWS Secrets Manager in Kubernetes: secret rotation and reloader

    Chokkalingam K (CK)

    In this tutorial, you'll look at how to configure EKS to use secrets and parameters from Amazon Secrets Manager and AWS Systems Manager Parameter Store.

More tutorials:

  1. 2-alchemists/krossboard-kubernetes-operator

    Krossboard is a multi-cluster and cross-distribution Kubernetes usage accounting and analytics software.

    Each instance of Krossboard enables tracking the usage of a set of Kubernetes clusters listed in a kubeconfig secret.

  2. viasat/nhd

    NHD is a topology-aware custom scheduler aware of low-level hardware details, such as CPU count, hyperthreading, GPUs, NUMA nodes, NICs, and more.

    The scheduler makes better decisions than the default Kubernetes scheduler for workload placement.

  3. cert-manager/aws-privateca-issuer

    AWS ACM Private CA is a module of the AWS Certificate Manager that can set up and manage private CAs.

    This project acts as an addon to cert-manager that signs off certificate requests using AWS PCA.

  4. kubeops/config-syncer

    Config Syncer keeps ConfigMaps and Secrets synchronized across namespaces and/or clusters.

  5. geovane-silva/restarting-pods-report

    This repository contains a Python script that uses the Kubernetes Python client to list the pods that restarted on a given period.

Other interesting projects:

Upcoming Kubernetes events

  1. Jul

    12

    Securing mariner container host workloads on AKS

    Online meetup organized by Microsoft Reactor London.

    • This is a virtual event

    • This is a free event.

  2. Jul

    13

    Low overhead automated distributed tracing with help of eBPF & Introduction to Skupper

    Online & in-person meetup organized by Dutch Kubernetes/Cloud-Native Meetup.

    • Location: Amsterdam, NL and virtual

    • This is a free event.

  3. Jul

    15

    Kubernetes: advanced storage concepts

    Online meetup organized by BlueCoders.

    • This is a virtual event

    • This is a free event.

  4. Jul

    17

    Kubernetes Community Days Munich 2023

    In-person conference organized by KCD Munich.

    • Location: Munich, DE

    • This event requires an entrance fee

  5. Jul

    19

    SKILup Day: Cloud Native

    Online conference organized by DevOps Institute.

    • This is a virtual event

    • This is a free event.

  6. Jul

    29

    Kubernetes Community Days Taiwan 2023

    Online & in-person conference organized by KCD Taiwan.

    • Location: Taipei, TW and virtual

    • This is a free event.

  7. Aug

    22

    DeveloperWeek Cloud

    Online conference organized by DevNetwork.

    • This is a virtual event

    • This event requires an entrance fee

Discover more Kubernetes events on Kube Events β†’

Kubernetes Call for Papers

  1. expired

    Wearedevelopers World Congress

    The Call For Paper was open until 19 July 2023 at UTC. More info β†’
    • Location:

    • In-person conference organized by WeAreDevelopers.

    • The conference starts on the 27 July 2023.

    • Apply here
  2. expired

    Kubernetes Community Days Austria 2023

    The Call For Paper was open until 31 July 2023 at UTC. More info β†’
    • Location: Vienna, AT

    • In-person conference organized by KCD Austria.

    • The conference starts on the 26 September 2023.

    • Apply here
  3. expired

    Data on Kubernetes Day

    The Call For Paper was open until 7 August 2023 at UTC. More info β†’
    • Location: Chicago, IL, USA

    • In-person conference organized by DoK.

    • The conference starts on the 6 November 2023.

    • Apply here
  4. expired

    Multi-TenancyCon

    The Call For Paper was open until 7 August 2023 at UTC. More info β†’
    • Location: Chicago, IL, USA

    • In-person conference organized by Linux Foundation.

    • The conference starts on the 6 November 2023.

    • Apply here
  5. expired

    Devopsdays Cairo

    The Call For Paper was open until 19 August 2023 at UTC. More info β†’
    • Location: Cairo, EG

    • In-person conference organized by Devopsdays.

    • The conference starts on the 26 September 2023.

    • Apply here
  6. expired

    Kube Native 2023

    The Call For Paper was open until 28 August 2023 at UTC. More info β†’
    • This is a virtual event

    • Online conference organized by Conf42.

    • The conference starts on the 28 September 2023.

    • Apply here
  7. expired

    Kubernetes Community Days Texas

    The Call For Paper was open until 30 August 2023 at UTC. More info β†’
    • Location: Irving, Texas, USA

    • In-person conference organized by KCD Texas.

    • The conference starts on the 6 October 2023.

    • Apply here
  8. expired

    Cloud Native Rejekts NA 23

    The Call For Paper was open until 5 September 2023 at UTC. More info β†’
    • Location: Chicago, US

    • In-person conference organized by Cloud Native Rejekts.

    • The conference starts on the 4 November 2023.

    • Apply here
  9. expired

    Open Source Summit Japan 2023

    The Call For Paper was open until 11 September 2023 at UTC. More info β†’
    • Location: Tokyo, JP and virtual

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

    • The conference starts on the 5 December 2023.

    • Apply here

Until next time!

β€” Dan

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