Learn Kubernetes Weekly issue 39
Distributed and auto-scalable web sockets server architecture, Demystifying CPU limits, Pod topology spread constraint pitfalls, timoni
9 Aug 2023
Articles
How to implement a distributed and auto-scalable websocket server architecture on Kubernetes
Erwan de Lépinau
In this case study, you will learn the challenges, designs and implementation details for a resilient and scalable backend architecture for WebRTC and Websockets on Kubernetes.
Demystifying Kubernetes CPU limits (and throttling)
Will Hegedus
In this article, you will discuss a clear example of CPU throttling on Kubernetes and how you could monitor and fix it.
Avoiding Kubernetes pod topology spread constraint pitfalls
Matthew Kennedy
In this article, you'll learn how to configure Pod Topology Spread Constraints correctly and how a naive configuration creates unexpected Pod skew.
If those are misconfigured, you could lose up to 2/3rds of your Pods.
Making sense of Kubernetes cpu requests and limits
Armen Shakhbazian
In this article, you'll examine what requests and limits mean, how they translate to OS primitives and how they are enforced.
You'll also learn some useful metrics to monitor and recommendations on calculating app requests and limits.
When is a CPU not a CPU? Benchmark of Kubernetes providers and node efficiency
Natan Yellin
In this article (and related), you will learn about node overhead on Kubernetes.
Then you'll benchmark cloud providers and find the worst offenders.
Why I will never use alpine Linux ever again
Martin Heinz
This article will discuss some of the trade-offs of using Alpine-based images.
- Issues with DNS.
muslcvsglibc.- Compiled packages.
- Size.
The article lists a few alternatives: Wolfi, Distroles, and UBI micro.
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!
Tutorials
Step-by-step: adding shared storage to a Kubernetes cluster
Gary Morse
In this tutorial, you'll learn how to expand the capabilities of a Kubernetes cluster by adding shared storage.
You'll follow the upgrade process of a cluster connected to a Synology NAS as an NFS server.
Istio service mesh with ALB in EKS
Neel Thomas
In this tutorial, you'll learn how to create an External and Internal Application Load Balancer with Istio Gateway.
You'll also learn how to expose multiple services using a single ALB ingress attached to wildcard SSL from ACM.
Capturing container packets from EKS worker nodes using tcpdump
Kieran Yio
There are times when you have to troubleshoot a network issue and need to inspect the traffic at the packet level.
This tutorial demonstrates capturing container packets from the EKS worker nodes.
Kube-green: an operator to reduce CO2 footprint of your Kubernetes clusters
Purushotham Reddy
In this tutorial, you will learn how kube-green can lower your cloud bill by suspending Deployments or CronJobs.
Vault with secrets store CSI driver on Kubernetes
Piotr Minkowski
This tutorial will teach you how to use the Secrets Store CSI Driver to integrate your app with HashiCorp Vault on Kubernetes.
More tutorials:
Kubernetes jobs
Software Engineer with Runway Financial
Salary: $170K to $200K a year
Location: fully remote
Tech stack: Kubernetes, GCP, Javascript, Typescript
DevSecOps Engineer with Onebrief
Salary: €140K to €200K a year
Location: based in the office in Stuttgart, DE
Tech stack: Kubernetes, AWS, On-premise, Helm, Docker, Terraform, Ansible
DevOps Engineer with Sigma Defense Systems
Salary: $100K to $135K a year
Location: remote from the United States
Tech stack: Kubernetes, AWS, Azure, Kustomize, Helm, Terraform
Discover more Kubernetes jobs on Kube Careers →
Code & tools
Timoni is a package manager for Kubernetes, powered by CUE and inspired by Helm.
Instead of using Go templates with YAML like Helm, or layering YAML like Kustomize, Timoni relies on Cuelang's type safety, code generation and data validation features.
Kubernetes observability (with Prometheus)
Robusta
With Robusta you can see what's really happening in your cluster:
- Uncover reliability and cost issues
- Ready-to-use dashboards and alerts
- Zoom into Kubernetes resources
You can leverage your existing Prometheus data.
sponsored
Tetragon enables powerful real-time, eBPF-based security observability and runtime enforcement.
It is Kubernetes-aware and understands identities so that security event detection can be configured in relation to individual workloads.
aiac is a command line tool to generate IaC (Infrastructure as Code) templates, configurations, utilities, queries and more via OpenAI's API.
Nautikos is a lightweight CI/CD tool for updating image tags in Kubernetes manifests.
Other interesting projects:
Upcoming Kubernetes events
Aug
9
An armful of clusters: run Kubernetes workloads more efficiently and sustainably
Online webinar organized by ARM.
This is a virtual event
This is a free event.
Aug
9
Building high throughput event-driven multi-tenant platforms in the cloud
Online meetup organized by Kansas City Microsoft Azure Meetup.
This is a virtual event
This is a free event.
Aug
10
Kubernetes priority and fairness
Online webinar organized by Containers from the couch.
This is a virtual event
This is a free event.
Aug
15
A step towards an IDP with GitOps, EKS, and Karpenter using aws-eks-blueprints
Online meetup organized by AWS User Group Beirut.
This is a virtual event
This is a free event.
Aug
15
In-person conference organized by DevNetwork.
Location: San Francisco, CA, USA
This event requires an entrance fee
Sept
25
Advanced Kubernetes course (London)
In-person workshop organized by Learnk8s.
Location: London, UK
This event requires an entrance fee
Oct
30
Advanced Kubernetes course (Amsterdam)
In-person workshop organized by Learnk8s.
Location: Amsterdam, NL
This event requires an entrance fee
Discover more Kubernetes events on Kube Events →
Kubernetes Call for Papers
expired
The Call For Paper was open until 18 August 2023 at UTC. More info →
This is a virtual event
Online conference organized by Sonatype.
The conference starts on the 26 October 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 Sri Lanka 2023
The Call For Paper was open until 28 August 2023 at UTC. More info →
Location: Colombo, LK
In-person conference organized by KCD Sri Lanka.
The conference starts on the 9 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 4 September 2023 at UTC. More info →
Location: Clearwater, FL, USA
In-person conference organized by NFJS Events.
The conference starts on the 4 December 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
expired
Kubernetes Community Days Denmark
The Call For Paper was open until 14 September 2023 at UTC. More info →
Location: Brabrand, DK
In-person conference organized by KCD Denmark.
The conference starts on the 14 November 2023.
- Apply here
Until next time!
— Dan
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