Learn Kubernetes Weekly issue 97 · 18 Sept 2024
Fairness aware load distribution, Kubernetes configuration in 2024, Container communication inside a pod, What determines a ready node?
This newsletter issue is brought to you by VictoriaMetrics — a fast and scalable open-source time series database and monitoring solution.
Articles
Fairness aware load distribution
medium.com
This article explores fairness-aware load distribution in Kubernetes, covering automatic rebalancing of customer data, flexible message processing, and failed message handling.
The rise of open source time series databases
victoriametrics.com
The number of active TimeSeries in databases like VictoriaMetrics is critical to performance.
Imagine your app generates 2 million time series from just a few labels—without the right tools, this could cause significant slowdowns.
sponsored
Kubernetes configuration in 2024
medium.com
This article revisits the state of Kubernetes configuration tools in 2024.
The author notes that while the tools have matured, the user experience has not changed dramatically over the past 7 years, leaving room for innovation in the space.
Container communication inside a Kubernetes pod
medium.com
Learn how containers in a pod share the same network namespace and IP address and can communicate using shared volumes, inter-process communications (IPC), and the loopback interface facilitated by the pause container.
What determines if a Kubernetes node is ready?
trstringer.com
The article discusses what determines if a Kubernetes node is ready, specifically the kubelet's checks: the container runtime, CSI provider, CPU, memory, max pods, network, and pod lifecycle event generator.
Do pods really get evicted due to CPU pressure?
awsmorocco.com
This article explores the concept of pods getting evicted due to CPU pressure on a node.
It discusses how CPU throttling prevents pods from monopolizing CPU resources, while node pressure eviction occurs when a node runs out of critical resources.
Articles worth checking out:
Reduces monitoring costs by 5x
VictoriaMetrics
VictoriaMetrics Cloud is a hosted monitoring platform and managed service for metrics that allows organizations to monitor and store large amounts of time-series data without running the underlying infrastructure.
Tutorials
How to reduce expenses on monitoring: be smarter about data
victoriametrics.com
Monitoring can get expensive due to the huge amounts of data that need processing.
In this blog post, you'll learn how to store and process monitoring metrics to reduce costs and how VictoriaMetrics can help.
sponsored
ImagePolicy webhook in Kubernetes
pramodhm112.medium.com
This article explains how to create a webhook server to handle ImagePolicy validation and the behaviour of the ImagePolicy webhook, including the rules section that defines API operations and resources to intercept.
Turbocharge ArgoCD with app of apps pattern and kustomized Helm
medium.com
Read about implementing the app of apps pattern in ArgoCD using the Helm template command.
This example builds on the Guestbook app, a project inspired by ArgoCD's documentation and comprised of four component microservices.
inovex.de
This guide describes how to perform a backup of k3s cluster using Litestream.
It explains the
litestream restorecommand and-if-db-not-existsflag, which allows the restoration of a database only if one is not already present.
In this KubeFM episode, Kensei Kanada discusses Tortoise, an open-source project he developed at Mercari to tackle Kubernetes resource optimization challenges. He explains the limitations of existing solutions like Horizontal Pod Autoscaler (HPA) and Vertical Pod Autoscaler (VPA), and how Tortoise aims to provide a more comprehensive and automated approach to resource management in Kubernetes clusters.
You will learn:
- The complexities of resource optimization in Kubernetes, including the challenges of managing HPA, VPA, and manual tuning of resource requests and limits
- How Tortoise automates resource optimization by replacing HPA and VPA, reducing the need for manual intervention and continuous tuning
- The technical implementation of Tortoise, including its use of Custom Resource Definitions (CRDs) and how it interacts with existing Kubernetes components
- Strategies for adopting and migrating to new tools like Tortoise in a large-scale Kubernetes environment
Kubernetes jobs
Site Reliability Engineer with Vimeo
Salary: $127.8K to $196K a year
Location: remote from the United States
Tech stack: Kubernetes, AWS, GCP, ArgoCD, Go, Python, Java, PHP, Ruby, C++
DevOps Engineer with Sierra Space
Salary: $104.83K to $144.14K a year
Location: based in the office in Centennial / Broomfield / Louisville, CO, USA
Tech stack: Kubernetes, AWS, Azure, GCP, On-premise, Docker, Shell, Python, C++, C
Site Reliability Engineer with Everwest
Salary: €40.8K to €52.8K a year
Location: based in the office in Vilnius, LT
Tech stack: Kubernetes, AWS, Azure, On-premise, Docker, Python, C#, Powershell, Terraform, Ansible
Discover more Kubernetes jobs on Kube Careers →
Code & tools
github.com/kubernetes-sigs
KWOK (Kubernetes-WithOut-Kubelet) is a toolkit that enables setting up a cluster of thousands of nodes in seconds.
Under the scene, all Nodes are simulated to behave like real ones, so the overall approach employs a pretty low resource footprint.
Kobs: Kubernetes observability platform
github.com/kobsio
Kobs is an application-centric observability platform for Kubernetes and Cloud workloads based on Custom Resource Definitions.
github.com/flant
Shell-operator provides an integration layer between Kubernetes cluster events and shell scripts by treating scripts as hooks triggered by events.
github.com/clastix
Kamaji is a tool aimed to build and operate a Managed Kubernetes Service with a fraction of the operational burden.
With Kamaji, you can deploy and operate hundreds of Kubernetes clusters as a hyper-scale cloud provider.
Chart-testing: linting and testing charts
github.com/helm
ct is a tool for testing Helm charts.
It is meant for linting and testing pull requests and automatically detects charts changed against the target branch.
Other interesting projects:
Upcoming Kubernetes events
Sept
24
Kubernetes Community Days Washington DC 2024
In-person conference organized by KCD Washington DC.
Location: Washington, DC, USA
This is a free event.
Sept
18
GPUs in Kubernetes: past, present, and future
Online meetup organized by Platformers Community.
This is a virtual event
This is a free event.
Sept
24
In-person conference organized by Fullstaq.
Location: Amersfoort, NL
This event requires an entrance fee
Sept
18
Towards standardized volumes: transitioning Odin's volume management to Kubernetes
In-person meetup organized by Cloud Native Aarhus.
Location: Aarhus, DK
This is a free event.
Sept
21
Backstage and Crossplane & delivery strategies with Argo CD and Kubernetes
In-person meetup organized by Cloud Native Coimbatore.
Location: Coimbatore, IN
This is a free event.
Kubernetes call for papers
expired
The Call For Paper was open until 31 October 2024 at UTC. More info →
Location: Amsterdam, NL
In-person conference organized by Cloud Native Amsterdam.
The conference starts on the 10 December 2024.
- Apply here
expired
The Call For Paper was open until 1 November 2024 at UTC. More info →
Location: Berlin, DE
In-person conference organized by TIC.
The conference starts on the 27 February 2025.
- Apply here
expired
Cloud Native Sustainability Week 2024
The Call For Paper was open until 24 September 2024 at UTC. More info →
This is a virtual event
Online conference organized by CNCF.
The conference starts on the 8 October 2024.
- Apply here
expired
The Call For Paper was open until 4 November 2024 at UTC. More info →
This is a virtual event
Online conference organized by Conf42.
The conference starts on the 5 December 2024.
- Apply here
expired
The Call For Paper was open until 18 September 2024 at UTC. More info →
Location: San Francisco, CA, USA
In-person conference organized by InfoQ.
The conference starts on the 18 November 2024.
- Apply here
expired
The Call For Paper was open until 30 November 2024 at UTC. More info →
Location: Bangkok, TH
In-person conference organized by Cybersec Asia.
The conference starts on the 29 January 2025.
- Apply here
expired
The Call For Paper was open until 20 October 2024 at UTC. More info →
Location: Chicago, IL, USA
In-person conference organized by Devopsdays.
The conference starts on the 18 March 2025.
- Apply here
expired
The Call For Paper was open until 10 November 2024 at UTC. More info →
Location: Bochum, DE
In-person conference organized by Hackmanit.
The conference starts on the 21 February 2025.
- Apply here
expired
The Call For Paper was open until 27 September 2024 at UTC. More info →
Location: Washington, DC, USA
In-person conference organized by DevIgnition.
The conference starts on the 7 November 2024.
- Apply here
Until next time!
— Dan