Learn Kubernetes Weekly issue 36
CPU requests & limits VS autoscaling, CoreDNS cache poisoning, what happens when you create a pod, roles for PostgreSQL with Vault
19 Jul 2023
Articles
Kubernetes CPU requests & limits VS autoscaling
Jason Umiker
In this blog post, you will learn:
- How CPU requests work.
- How CPU limits work.
- How requests & limits apply to programming languages.
- Cases when limits aren't the best option.
- What alternatives you can use to limits.
The CoreDNS cache poisoning conjecture
Giuseppe Cocomazzi
In this article, you will inspect the CoreDNS source code and learn how it is susceptible to cache poisoning.
You will also learn how to mitigate such an attack.
What happens when you create a pod in Kubernetes
Daniele Polencic
What happens when you create a Pod in Kubernetes?
A surprisingly simple task reveals a complicated workflow that touches several components in the cluster.
Learn more in this article.
Managing roles for PostgreSQL with Vault on Kubernetes
Éric Burghard
In this article, you will learn how your Kubernetes deployment can access a database with random roles and passwords (and eventually restricted privileges) that are rotated every hour and deleted after expiration.
Price comparison of managed Kubernetes solutions for web-apps
Oleg Schelkunov
In this article, you will compare pricing for seven Kubernetes managed services to run modern web applications in a price-aware, scalable, and resilient way.
Spoiler: GCP has the most expensive and the cheapest options at the same time.
Horizontal pod autoscaling for "scale"!
Kaartikeya Chaudhary, Anshul Sharma
In this article, you will find a list of considerations and tips on how to architect your apps, your cluster and your autoscaling strategy to optimise your Horizontal Pod Autoscaler during surges in traffic.
Articles worth checking out:
Kubernetes first steps book (& videos!)
Learnk8s
TL;DR: In this course, you will learn how to package and deploy applications as Docker containers in a Kubernetes cluster.
You will also learn how to architect apps that are designed to be horizontally scalable.
Tutorials
Kubernetes observability: events, logs & integration with Slack, OpenAI and Grafana
Akriotis Kyriakos
In this 3-part series, you will learn how to:
- Build a custom controller to watch Kubernetes Events and forward them to Grafana Loki using Promtail.
- Forward alerts to Slack and investigate the root cause with the help of OpenAI Chat API.
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 — all sleekly bundled into a compact app!
sponsored
Magsther
In this tutorial, you will learn how you can implement traces in your application without any code changes by using the OpenTelemetry Operator.
Automatically updating Helm charts referenced by Argo CD with Renovate
K@zuki.
In this tutorial, you will learn how to use Renovate to constantly update your Helm charts when deploying them with Argo CD.
Code & tools
mmumshad/kubernetes-the-hard-way
This tutorial walks you through setting up Kubernetes the hard way using VirtualBox.
This guide is optimized for learning, which means taking the long route to ensure you understand each task required to bootstrap a cluster.
Setting up Prometheus runbooks
Robusta.dev
Learn how to set up Robusta — an open source rules engine for Kubernetes designed for monitoring and observability.
Learn how to:
- Listen passively to various sources.
- Actively collect observability data.
- Send alerts.
sponsored
AutoK3s is a lightweight tool for simplifying the cluster management of K3s.
Key features:
- Shorter provisioning time.
- Cloud provider integration.
- Flexible installation options.
- Low cost.
- Airgap K3s package management and installation.
This repo covers Kubernetes objects' and components' details (Kubectl, Pod, Deployment, Service, ConfigMap, Volume, PV, PVC, etc.) and possible example usage scenarios (i.e. hands-on labs).
ktail is a tool to easily tail Kubernetes logs.
It's like kubectl logs, but with more features to make it more convenient:
- Detects pods and containers as they come and go.
- Tails multiple pods and containers.
- All containers are tailed by default.
Other interesting projects:
Upcoming Kubernetes events
Jul
20
Manage Kubernetes clusters in a multi-cloud world
In-person meetup organized by Cloud Native Montpellier.
Location: Montpellier, FR
This is a free event.
Jul
21
Implementing data & databases on Kubernetes within the Dutch government
Online meetup organized by Data on Kubernetes Community.
This is a virtual event
This is a free event.
Jul
22
Kubernetes Community Days Chennai 2023
In-person conference organized by KCD Chennai.
Location: Chennai, IN
This event requires an entrance fee
Jul
25
Intro to Tetragon: eBPF-based security observability & runtime enforcement
Online webinar organized by CNCF Online Programs.
This is a virtual event
This is a free event.
Jul
26
Optimizing network costs in Kubernetes
Online & in-person meetup organized by Cloud Native Johannesburg.
Location: Johannesburg, ZA and virtual
This is a free event.
Aug
22
Online conference organized by DevNetwork.
This is a virtual event
This event requires an entrance fee
Sept
11
Online & in-person conference organized by Loovent.
Location: Hamburg, DE and virtual
This event requires an entrance fee
Discover more Kubernetes events on Kube Events →
Kubernetes Call for Papers
expired
Wearedevelopers World Congress
The Call For Paper was open until 19 July 2023 at UTC. More info →
Location:
In-person conference organized by WeAreDevelopers.
The conference starts on the 27 July 2023.
- Apply here
expired
Kubernetes Community Days Austria 2023
The Call For Paper was open until 31 July 2023 at UTC. More info →
Location: Vienna, AT
In-person conference organized by KCD Austria.
The conference starts on the 26 September 2023.
- Apply here
expired
The Call For Paper was open until 7 August 2023 at UTC. More info →
Location: Chicago, IL, USA
In-person conference organized by DoK.
The conference starts on the 6 November 2023.
- Apply here
expired
The Call For Paper was open until 7 August 2023 at UTC. More info →
Location: Chicago, IL, USA
In-person conference organized by Linux Foundation.
The conference starts on the 6 November 2023.
- Apply here
expired
The Call For Paper was open until 19 August 2023 at UTC. More info →
Location: Cairo, EG
In-person conference organized by Devopsdays.
The conference starts on the 26 September 2023.
- Apply here
expired
The Call For Paper was open until 28 August 2023 at UTC. More info →
This is a virtual event
Online conference organized by Conf42.
The conference starts on the 28 September 2023.
- Apply here
expired
Kubernetes Community Days Texas
The Call For Paper was open until 30 August 2023 at UTC. More info →
Location: Irving, Texas, USA
In-person conference organized by KCD Texas.
The conference starts on the 6 October 2023.
- Apply here
expired
The Call For Paper was open until 5 September 2023 at UTC. More info →
Location: Chicago, US
In-person conference organized by Cloud Native Rejekts.
The conference starts on the 4 November 2023.
- Apply here
expired
The Call For Paper was open until 11 September 2023 at UTC. More info →
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!
— Dan
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