awesome-kubernetes/docs/kubernetes.md

Kubernetes. "Kubernetes is not for application development but for platform development" (Kelsey Hightower)

• Introduction
  • Kubernetes Jobs Market
  • Certified Kubernetes Offerings
  • The State of Cloud-Native Development
  • Kubernetes Failure Stories
  • Kubernetesbyexample
  • Kubernetes Knowledge Hubs
    • Kubernetes Blogs
    • Spanish Kubernetes Blogs
• Kubernetes Open Source Container Orchestation
  • kubeconfig
  • Docker and Kubernetes
  • Kubernetes Cloud Controller Manager
  • Kubernetes Resources
    • Kubernetes Pods
    • Kubernetes ConfigMaps
    • Kubernetes Secrets
    • Kubernetes Volumes
    • Namespaces and Multi Tenancy. Self Service Namespaces
      • Creating Users
    • Kubernetes Labels and Selectors
    • Kubernetes Taints and Tolerations
    • Kubernetes Deployment, Rollling Updates and Rollbacks
    • Kubernetes StatefulSet
    • Kubernetes Jobs and Cron Jobs
  • Kubernetes Deployment Strategies
  • Kubernetes API
  • Kubernetes Health Checks/Probes. Startup, Liveness, Readiness
  • Kubernetes Limits
  • Kube Scheduler
  • Kubernetes etcd
  • Kubernetes Sidecars
  • Kubernetes Annotations
  • Kubernetes Best Practices and Tips
  • Disruptions
  • Cost Estimation Strategies
    • kubecost
  • Kubernetes Resource and Capacity Management. Capacity Planning
  • Kubernetes Monitoring
    • Logging in Kubernetes
    • ECK Elastic Cloud on Kubernetes
  • Architecting Kubernetes clusters. Node Size. Multi Clusters and Hybrid Cloud
• Client Libraries for Kubernetes
• Helm Kubernetes Tool
• Templating YAML in Kubernetes with real code. YQ YAML processor
• Quality Checks for Kubernetes YAMLs
• Extending Kubernetes
  • Adding Custom Resources. Extending Kubernetes API with Kubernetes Resource Definitions. CRD vs Aggregated API
  • Krew, a plugin manager for kubectl plugins
  • OpenKruise/Kruise
  • Crossplane, a Universal Control Plane API for Cloud Computing. Crossplane Workloads Definitions
• Kubernetes Community
  • Community Forums
  • Kubernetes Special Interest Groups (SIGs)
    • Kubernetes SIG's Repos
    • Kubectl Plugins
• Enforcing Policies and governance for kubernetes workloads with Conftest
• Kubernetes Troubleshooting
  • Provisioning cloud resources (AWS, GCP, Azure) in Kubernetes
  • Debugging Techniques and Strategies. Debugging with ephemeral containers
• Kubernetes Tutorials
  • Online Training
  • K8s Diagrams
• Kubernetes Patterns and Antipatterns. Service Discovery
• Kubernetes Scheduling and Scheduling Profiles
  • Assigning Pods to Nodes. Pod Affinity and Anti-Affinity
  • Pod Topology Spread Constraints and PodTopologySpread Scheduling Plugin
• Cloud Development Kit (CDK) for Kubernetes
  • AWS Cloud Development Kit (AWS CDK)
• Serverless with OpenFaas and Knative
• Multi-Cluster Federation. Hybrid Cloud Setup Tools
  • KubeFed
  • KubeCarrier
  • Red Hat Operator Lifecycle Manager (OLM)
  • Istio Service Mesh
• Kubernetes Scripts
  • Kubernetes and Ansible
• Spot instances in Kubernetes
• Kubernetes Incident Report Plan IRP
• Kubernetes interview questions
• Certified Kubernetes Application Developer (CKAD)
• Books and eBooks
  • Kubernetes Patterns eBooks
  • Famous Kubernetes ebooks of 2019
• Famous Kubernetes resources of 2019
• Famous Kubernetes resources of 2020
• Kubernetes Slack Channel
• Bunch of images
• Videos
• Tweets

Introduction

• Wikipedia.org: Kubernetes
• cloud.google.com: What is Kubernetes? 🌟
• Kubernetes Glossary 🌟
• twitter.com/kubernetesio
• enterprisersproject.com: Kubernetes: Everything you need to know (2020) 🌟
• padok.fr: Kubernetes’ Architecture: Understanding the components and structure of clusters 🌟
• opensource.com: Explaining Kubernetes in 10 minutes using an analogy
• medium: A Practical Step-by-Step Guide to Understanding Kubernetes Deploy a distributed application and understand key underlying concepts.
• medium: Kubernetes, a practical introduction
• itnext.io: Kubernetes is Hard! 🌟 But, where there’s Kubernetes, there’s a way!
• medium: Starting with kubernetes
• thenewstack.io: Kubernetes Is the New Standard for Computing, Including the Edge
• thenewstack.io: How does kubernetes work?
• cloudsavvyit.com: How Does Kubernetes Work?
• elmanytas.es: Kubernetes para impostores III
• enterprisersproject.com: How to explain Kubernetes in plain English How do you explain Kubernetes and orchestration to non-technical people? Listen to the experts
• maximilianmichels.com: Kubernetes in a Nutshell: 10 Things You Need to Know
• brennerm.github.io: Kubernetes Overview Diagrams 🌟
• thenewstack.io: Kubernetes Lifecycle Management! So Important! (Day 0, Day 1, Day 2) 🌟
• lemoncode.net: Hola Kubernetes: Definiciones 🌟
• opensource.com: A beginner's guide to Kubernetes container orchestration Understanding the building blocks of container orchestration makes it easier to get started with Kubernetes.
• luminousmen.com: Kubernetes 101
• css-tricks.com: Kubernetes Explained Simply: Containers, Pods and Images
• auth0.com: Kubernetes Tutorial - Step by Step Introduction to Basic Concepts Learn about the basic Kubernetes concepts while deploying a sample application on a real cluster.
• thenewstack.io: Why developers should learn kubernetes
• thenewstack.io: This Week in Programming: Kubernetes from Day One? 🌟
• nextplatform.com: KUBERNETES EXPANDS FROM CONTAINERS TO INFRASTRUCTURE MANAGEMENT 🌟 More and more in the middleware layer, not in the hardware
• thenewstack.io: Monolithic Development Practices Kill Powerful Kubernetes Benefits 🌟🌟 "It’s not about the economy of data, it’s about speed and nimbleness of data. The benefits of using Kubernetes and microservices is incredible — just make sure you know how to fully wield its power!"
• dev.to: Getting Started Tutorial for Learning Kubernetes 🌟
• tech.showmax.com: Developers' basic guide to kubernetes
• dev.to: How to start with Kubernetes for begginer
• opensource.com: How the Kubernetes scheduler works Understand how the Kubernetes scheduler discovers new pods and assigns them to nodes.
• medium.com: The Kubernetes Scheduler: this series aims to advance the understanding of Kubernetes and its underlying concepts
• blogs.mulesoft.com - K8s: 8 questions about Kubernetes
• devcentral.f5.com: What is Kubernetes?
• docs.google.com: Kubernetes For Everyone 🌟🌟 A consolidated document on Kubernetes by: Pavan Belagatti
• hackernoon.com: The Ultimate Beginners Guide To Kubernetes and Container Orchestration
• k21academy.com: Kubernetes Architecture. An Introduction to Kubernetes Components
• dzone: Introduction To Kubernetes 🌟 An orchestration tool takes care of provisioning and deployment, allocation of resources, load balancing, and many other important aspects of any system.
• weave.works: Kubernetes components that make up its architecture 🌟 Great intro
• dzone refcard: Advanced kubernetes 🌟
• loginradius.com: Understanding Basics of Kubernetes
• redhat.com: Kubernetes basics for sysadmins Learn when Kubernetes can be effectively used and how the containers it manages might be better than virtual machines.
• redhat.com: Kubernetes Components - A sysadmin's guide to basic Kubernetes components 🌟 Kubernetes control plane nodes and worker nodes, their features, and how they interact.
• learnsteps.com: How Kubernetes works on reconciler pattern 🌟
• devopsunlocked.com: Kubernetes: Learning Material
• cncf.io: Kubernetes 101: An Introduction 🌟
• millionvisit.blogspot.com: Kubernetes for Developers #1: Kubernetes Architecture and Features 🌟
• redhat.com: Start learning Kubernetes from your local machine
• medium: Pratyush Mathur - Kubernetes Architecture
• medium: Kubernetes Fundamentals For Absolute Beginners: Architecture & Components
• learnsteps.com: What is a control plane? Basics on Kubernetes
• infoworld.com: No one wants to manage Kubernetes anymore 🌟 The availability of solid and varied managed kubernetes options has seen more and more companies shy away from managing their own clusters.
• fairwinds.com: Never Should You Ever In Kubernetes: #1 Do K8S The Hard Way
• eximiaco.tech: when to choose Kubernetes? 🌟
• thenewstack.io: Living with Kubernetes: Cluster Upgrades 🌟
• thenewstack.io: 5 Things Developers Need to Know About Kubernetes Management
• How to handle environment variables with Kubernetes? 🌟
• itnext.io: Software development in containers — a cookbook 🌟🌟🌟 A guide to developing containerized software

Kubernetes magic is in enterprise standardization, not app portability 🌟

Kubernetes Jobs Market

• kube.careers: Kubernetes jobs market (Q2 2021) We analyzed all the 113 Kubernetes jobs posted in the past 3 months (Apr-May-Jun 2021) and extracted metrics for:
  • Kubernetes salary ranges
  • Remote vs office offers
  • Popular cloud providers

Certified Kubernetes Offerings

• Certified Kubernetes offerings

The State of Cloud-Native Development

• Cloud-Native Development Survey Details Kubernetes, Serverless Data Detailed data on the use of Kubernetes, serverless computing and more.

Kubernetes Failure Stories

• k8s.af 🌟
• thenewstack.io: Kubernetes Horror Stories
• techbeacon.com: Why teams fail with Kubernetes—and what to do about it
• kodekloud.com: Kubernetes Features Every Beginner Must Know

Kubernetesbyexample

• kubernetesbyexample.com 🌟🌟 A free learning platform covering the fundamentals of how to develop, deploy, manage, and automate containers in cloud-native environments.

Kubernetes Knowledge Hubs

• kubernetes.io
• reddit.com/r/kubernetes
• Kubernetes README: kubernetesreadme.com What to Read to Learn More About Kubernetes
• k8sref.io Kubernetes Reference - dev-k8sref-io.web.app
• learnk8s.io: Kubernetes Research. Research documents on node instance types, managed services, ingress controllers, CNIs, etc. A research hub to collect all knowledge around Kubernetes. Those are in-depth reports and comparisons designed to drive your decisions. Should you use GKE, AKS, EKS? How many nodes? What instance type?

Kubernetes Blogs

• Awesome kubernetes
• unofficial-kubernetes.readthedocs.io
• learnk8s.io/blog
• kubermatic.com
• containerjournal.com
• cloudowski.com
• dev.to/t/kubernetes
• kubernetes-on-aws.readthedocs.io
• opensource.com/tags/kubernetes
• itnext.io/tagged/kubernetes
• thenewstack.io/category/kubernetes
• k21academy.com/category/docker-kubernetes
• weave.works/blog/category/kubernetes
• learnsteps.com/tag/basics-on-kubernetes
• devopscube.com
• rcarrata.com

Spanish Kubernetes Blogs

• returngis.net

Kubernetes Open Source Container Orchestation

• kubedex.com Discover, Compare and Share Kubernetes Applications
• medium.com: A Year Of Running Kubernetes at MYOB, And The Importance Of Empathy
• labs.mwrinfosecurity.com: Attacking Kubernetes through Kubelet
• itnext.io: Successful & Short Kubernetes Stories For DevOps Architects
• platform9.com: Kubernetes CI/CD Pipelines at Scale
• 4 trends for Kubernetes cloud-native teams to watch in 2020
• 5 open source projects that make Kubernetes even better: Prometheus, Operator framework, Knative, Tekton, Kubeflow 🌟 Open source projects bring many additional capabilities to Kubernetes, such as performance monitoring, developer tools, serverless capabilities, and CI/CD workflows. Check out these five widely used options
• 4 trends for Kubernetes cloud-native teams to watch in 2020 Today's software architectural landscape seems to change like the weather. Stay ahead of the curve with these cloud-related trends, including GitOps and service meshes.
• Creating a Kubernetes cloud provider, doesn't required boiling the ocean
• opensource.com: 5 ways to boost your Kubernetes knowledge
• blog.container-solutions.com: 7 Cloud Native Trends to Watch in 2020
• snyk.io: Shipping Kubernetes-native applications with confidence
• medium: Delivering value on Kubernetes
• blocksandfiles.com: Kubernetes is in a bit of state about state Kubernetes is “four to five years away” from being a stable distribution capable of running stateful apps, according to Redis Labs chief product officer Alvin Richards.
• medium: Then he asked me “Is Kubernetes right for us?”
• loft.sh: Kubernetes: Virtual Clusters For CI/CD & Testing
• jfrog.com: Kubernetes in Production with Jessica Deen at swampUP 2020
• lambda.grofers.com: Learnings From Two Years of Kubernetes in Production
• medium: 3 Years of Kubernetes in Production–Here’s What We Learned
• revistacloudcomputing.com: Los mejores proveedores de Kubernetes
• Virtual Clusters for Kubernetes — Benefits and Use Cases Virtual Kubernetes clusters could be the next driver for Kubernetes adoption.
• Getting a shell on each node Learn how you can use a DaemonSet to expose an SSH shell on each node of your cluster (even if you don't have SSH installed)
• medium: Virtual Clusters for Kubernetes — Benefits and Use Cases Virtual Kubernetes clusters could be the next driver for Kubernetes adoption
• containerjournal.com: Overcoming Kubernetes Infrastructure Challenges
• medium: Installing cf-for-k8s on a Kubernetes Cluster Running on Digital Ocean If you want to install Cloud Foundry on Kubernetes on Digital Ocean, you might find this article relevant.
• itnext.io: Lessons learned from managing a Kubernetes cluster for side projects (GKE)
• projectcalico.org: Using Kubernetes to orchestrate VMs
• lastweekinaws.com: Is ECS deprecated? Has Kubernetes won?
• opensource.com: 8 Kubernetes insights for 2021 Review the top five Kubernetes articles of 2020, then preview three tools you should learn about in 2021.
• srcco.de: Zalando - Many Kubernetes Clusters instead of 1 huge cluster Running 80+ Kubernetes clusters in production? Yes, Zalando runs 100+ Kubernetes clusters on AWS.
  • Each cluster runs in its own AWS account.
  • They always create a pair of prod/non-prod clusters per "product community", i.e. only half of their clusters (50+) are marked as "production" and have full 24x7 on-call support.
  • They decided to go with "many" (that's relative) clusters for various reasons:
    • Kubernetes has no strong story for multi-tenancy, having "smaller" clusters mitigates part of this problem
    • Some infrastructure is shared per cluster, e.g. Prometheus and the Ingress proxy (Skipper) --- this requires appropriate (vertical) scaling of these components, smaller clusters make this easier to handle
    • The blast radius is limited --- anything going wrong in one cluster (outage, security incident, ..) does not necessarily affect the whole organization
    • Cost attribution is easier (every cluster belongs to a cost center)
    • The cluster (and its AWS account) serves as a natural trust boundary for access control (you can either deploy via CI/CD to a cluster or not)
• platform9.com: The Gorilla Guide to Kubernetes in the Enterprise Discover key capabilities for Kubernetes at scale.
  • A complete Enterprise Kubernetes infrastructure needs proper DNS, load balancing, Ingress, stateful services, K8’s role-based access control (RBAC), integration with LDAP and authentication systems, and more. Once Kubernetes is deployed, day-2 operational challenges and life-cycle management comes into play: monitoring, alerting, troubleshooting, upgrades, security patching, compliance checking and much more.
  • The Gorilla guide to Kubernetes in the Enterprise is your resource to ensure the success of your Enterprise Kubernetes projects by thinking through critical decisions around deployment options, day-2 operational considerations, use cases, and choosing your Kubernetes implementation solutions.
• magalix.com: Influencing Kubernetes Scheduler Decisions To ensure maximum possible performance and availability given the infrastructure at hand, the scheduler uses complex algorithms to ensure the most efficient Pod placement. In this article, we discuss how the scheduler selects the best node to host the Pod and how we can influence its decision.
• medium: Making Sense of Taints and Tolerations in Kubernetes
• devopscube.com: 10 Key Considerations for Kubernetes Cluster Design & Setup 🌟
• sysdig.com: Kubernetes admission controllers in 5 minutes
• blog.pixielabs.ai: Building Kubernetes Native SaaS applications: iterating quickly by deploying in-cluster data planes
• itnext.io: CKS Exam Series #9 RBAC v2 Kubernetes CKS Example Exam Question Series
• dzone: Scale to Zero With Kubernetes with KEDA and/or Knative This article reviews how Kubernetes provides the platform capabilities for dynamic deployment, scaling, and management in Cloud-native applications.
• infoq.com: Experts Discuss Top Kubernetes Trends and Production Challenges
• blog.appstack.one: How to run Ghost blog inside Kubernetes
• learnk8s.io: Scaling Celery workers with RabbitMQ on Kubernetes In this article, you will explore how to use Kubernetes and KEDA to scale Celery workers based on the number of messages in a RabbitMQ queue.
  1. Learn how to set up a metrics pipeline
  2. How you can drive autoscaling based on metrics from RabbitMQ.
  3. Why KEDA might be an alternative to prometheus+adapters
• superuser.openstack.org: Run Your Kubernetes Cluster on OpenStack in Production
• andrewlock.net: Series: Deploying ASP.NET Core applications to Kubernetes
  • andrewlock.net: Deploying ASP.NET Core applications to Kubernetes - Part 6 - Adding health checks with Liveness, Readiness, and Startup probes
• infoq.com: The Evolution of Distributed Systems on Kubernetes What Comes After Microservices:
  • Yet Microservices gives us the guiding principles on how to split a monolithic application into separate business domains.
  • After that came serverless and Function-as-a-Service (FaaS), where we said we could split those further by operations, giving us extreme scaling - because we can scale each operation individually.
  • The author argues that maybe FaaS is not the best model - as functions are not the best model for implementing reasonably complex services where you want multiple operations to reside together when they have to interact with the same dataset.
  • Probably, multi-runtime as the author calls it Mecha architecture, where you have your business logic in one container, and you have all the infrastructure-related concerns as a separate container.
  • They jointly represent a multi-runtime microservice. Maybe that's a more suitable model because it has better properties.
  • You get all the benefits of microservice. You still have all your domain, all the bounded contexts in one place.
  • You have all the infrastructure and distributed application needs in a separate container, and you combine them at runtime.
  • Probably, the closest thing that's getting to that right now is Dapr.
• medium: Graceful shutdown of fpm and nginx in Kubernetes
• fairwinds.com: Over-Provisioned and Over-Permissioned Containers & Kubernetes
• betterprogramming.pub: How to Implement Your Distributed Filesystem With GlusterFS And Kubernetes Learn the advantages of using GlusterFS and how can it help in achieving a highly-scalable, distributed filesystem.
• compliantkubernetes.io: Compliant Kubernetes is a Certified Kubernetes distribution, that complies with: HIPAA, GDPR, PCI DSS, FFFS 2014:7, ISO 27001, etc. 🌟
• medium: Scaling Kubernetes with Assurance at Pinterest
• blog.flant.com: How we enjoyed upgrading a bunch of Kubernetes clusters from v1.16 to v1.19
• openshift.com: Topology Aware Scheduling in Kubernetes Part 1: The High Level Business Case
  • openshift.com: Topology Awareness in Kubernetes Part 2: Don’t we already have a Topology Manager?
• Kubernetes setup with CRI-O Runtime Example to build Kubernetes Clusters using CRI-O runtime instead of Docker
• blog.min.io: Kubernetes, Consistency and Commoditization - The Way of the Cloud
• hjrocha.medium.com: Add a Custom Host to Kubernetes
• rancher.com: The Three Pillars of Kubernetes Container Orchestration 🌟
• qwinix.io: What Is Kubernetes? K8s Uses, Benefits, & More
• thenewstack.io: Governance, Risk and Compliance with Kubernetes
• zhimin-wen.medium.com: Custom Notifications with Alert Manager’s Webhook Receiver in Kubernetes
• harness.io: Introducing Recommendations API: Find Potential Cost Savings Programmatically
• blog.harbur.io: Demystifying stateful apps on Kubernetes by deploying an etcd cluster In this tutorial you will learn how to deploy an etcd cluster in Kubernetes
• blog.kintone.io: Rebooting a LOT of Kubernetes nodes in a declarative way
• infoworld.com: How Kubernetes works If you want to understand containers, microservices architecture, modern application development, and cloud native computing, you need to understand Kubernetes.
• infoq.com: Cloud Native and Kubernetes Observability: Expert Panel
• kubernetes.io: Don't Panic: Kubernetes and Docker
• thenewstack.io: Exploring the New Kubernetes Maturity Model
• blog.bandowski.eu: Tools that should be used in every Kubernetes cluster 🌟
  • ArgoCD for deploying your resources the GitOps way
  • MetalLB in case you need a load balancer when running Kubernetes on-prem and not in a cloud
  • external-secrets to easily sync the secrets of your external secret manager with your Kubernetes cluster
  • cert-manager 🌟 to easily retrieve and/or generate new certificates on the fly
    • github.com/cert-manager
    • github.com/cert-manager: Policy Approver Policy Approver is a cert-manager approver that is responsible for Approving or Denying CertificateRequests.
  • external-dns to manage your DNS entries automatically
• redhat.com: Building containers by hand: The PID namespace The PID namespace is an important one when it comes to building isolated environments. Find out why and how to use it.
• infoq.com: The Kubernetes Effect
• dustinspecker.com: iptables: How Kubernetes Services Direct Traffic to Pods
• dustinspecker.com: Scaling Kubernetes Pods using Prometheus Metrics 🌟 one of Kubernetes many features is auto-scaling workloads. Typically, Horizontal Pod Autoscalers scale pods based on CPU or memory usage. During other times we could better scale by using custom metrics that Prometheus is already scraping. Fortunately, Horizontal Pod Autoscalers can support using custom metrics. I’m a fan of the kube-prometheus 🌟 project, but it wasn’t apparent how to set up a Horizontal Pod Autoscaler using custom metrics. This post walks through:
  • Deploying kube-prometheus (Prometheus operator, Prometheus adapter, Grafana, and more)
  • Creating a custom metrics APIService
  • Configuring Prometheus adapter to support our custom metrics
  • Deploying a Horizontal Pod Autoscaler for Grafana using a custom metric
• dev.to: How to switch container runtime in a Kubernetes cluster
• digizoo.com.au: How to Master Admission Webhooks In Kubernetes (GKE) (Part One) Admission webhooks are HTTP callbacks that receive admission requests (for resources in a K8s cluster) and do something with them. You can define two types of admission webhooks, validating admission webhook and mutating admission webhook.
• itnext.io: Breaking down and fixing etcd cluster
• itnext.io: Kubernetes: what are Endpoints
• medium.com: Using kubernetes custom resources to manage our ephemeral environments Building a Kubernetes operator with kubebuilder to manage ephemeral environments.
• medium: Running Apache Flink on Kubernetes
• learnsteps.com: How exactly kube-proxy works: Basics on Kubernetes
• medium.com: Connect services across Kubernetes clusters using Teleproxy Teleproxy is a shell script that lets you quickly replace a Kubernetes deployment by a single pod that forwards incoming traffic to another pod running in a destination Kubernetes cluster.
• medium: Kubernetes DNS for Services and Pods
• edgehog.blog: Getting Started with K8s: Core Concepts
• talos-systems.com: Is Vanilla Kubernetes Really Too Heavy For The Raspberry Pi?
• infoq.com: Kubernetes Workloads in the Serverless Era: Architecture, Platforms, and Trends
• blog.kintone.io: Tolerating failures in container image registries This article will show you several ways to ensure your Kubernetes clusters can always pull images even while an upstream registry is failing.
• blog.px.dev: How etcd works and 6 tips to keep in mind
• containerjournal.com: Kubernetes’ True Superpower is its Control Plane
• dev.to: A Deep Dive Into Kubernetes Schema Validation
• tremolosecurity.com: Pipelines and Kubernetes Authentication The Right Way To Authenticate to Your Clusters From Your CI/CD Pipelines:
  • Don't use ServiceAccount tokens outside of your cluster
  • Create service accounts inside of your authentication identity provider, assign RBAC privileges
  • Easy with Okta and OpenUnison
• usepine.com: Improving cert-manager HTTP01 self-check speed This post describes how to improve cert-manager self-check speed, by pointing the cluster to Google nameservers, and disabling DNS caching
• datree.io: A Deep Dive Into Kubernetes Schema Validation 🌟 Great overview of different schema validation tools, incl. server-side ,dry-run“. But I think with tools like kind in CI it’s actually less of a burden to spin up K8s and do proper server-side validation (which catches all issues as mentioned in the post).
• community.suse.com: Stupid Simple Kubernetes — Deployments, Services and Ingresses Explained
• elastisys.com: PCI DSS compliance in Kubernetes-based platforms
• infracloud.io: Avoiding Kubernetes Cluster Outages with Synthetic Monitoring Synthetic monitoring consists of pre-defined checks to proactively monitor the critical elements in your infrastructure. These checks simulate the functionality of the elements. We can also simulate the communication between the elements to ensure end-to-end connectivity. Continuous monitoring of these checks also helps to measure overall performance in terms of availability and response times.
• talos-systems.com: Is Vanilla Kubernetes Really Too Heavy For The Raspberry Pi?
• towardsdatascience.com: Kubernetes 101: Cluster Architecture They say a picture is worth a thousand (or a million) words
• blog.kintone.io: Tolerating failures in container image registries 🌟
• thenucleargeeks.com: Taints and Tolerations in Kubernetes
• humanitec.com: Benchmark your Kubernetes setup against 500+ other teams and find out how well (or not) you are doing
• devopshubproject/cka-lab This repo contains set of practice questions which will help you to get ready for the cka exam.
• medium: Run Kubernetes Production Environment on EC2 Spot Instances With Zero Downtime: A Complete Guide
• shayn-71079.medium.com: Scaling Kubernetes Clusters The below figure presents a schematic diagram of how cluster auto-scaling is done in AWS EKS clusters.
• itnext.io: Kubernetes Essential Tools: 2021
• thenewstack.io: Living with Kubernetes: Multicluster Management
• tigera.io: Comparing kube-proxy modes: iptables or IPVS?
• fairwinds.com: K8s Clinic: How to Run Kubernetes Securely and Efficiently 🌟
  • With the adoption of containers, software packaging is increasingly shifting left, which means (depending on your organization) that developers are taking on responsibility for the containerization of applications. Developers may also be responsible for some parts of Kubernetes configuration. As that process shifts left, developers need support to make the right decisions for the organization in order to run Kubernetes securely and efficiently.
  • Many companies are adopting cloud native technologies to deliver speed to market. For businesses seeking to compete in today's marketplace, it’s important to ship new features and meet customer needs where they are — and increasingly those needs are being met through software.
• weave.works: Production Ready Checklists for Kubernetes 🌟
• containerjournal.com: The Rise of the KubeMaster 🌟
  • It wasn’t obvious while it was happening, probably because everyone was focused on dealing with a global pandemic, but your IT environment became more complex. Cloud technology continued to evolve, and while that was happening, cloud use grew. Hybrid cloud use, already growing before the pandemic, became much more established with a year-over-year annual growth rate of 17.8%, according to Quince Market Insights. And with more distinct technology advances from each of the major cloud service providers, multi-cloud use also became more established.
  • This more complex environment encouraged the use of containers, and Kubernetes became the preferred means of managing them. Unfortunately, the great irony of Kubernetes is that the technology created to make the management of modern cloud applications easier is, itself, incredibly difficult to manage. Just to deploy and manage a single application in your own data center requires working familiarity with a Kubernetes distribution and working integrations with a number of supporting systems and enterprise software including code registries, CI/CD, secrets management, storage management, networking, logging and monitoring, service mesh, backup and disaster recovery (DR). That’s just for one environment. In a hybrid infrastructure, perhaps using one of the leading cloud service providers such as AWS, Azure or GCP, you could double this overhead.
  • This rapid growth combined with immense complexity means not every Kubernetes implementation has been successful, and in the worst cases, misconfigurations have led to security breaches and significant application downtime. Overwhelmed teams with insufficient training only make the problem worse, putting these implementations farther behind as Kubernetes management becomes increasingly difficult. As such, I believe the time is now for a new role to emerge in the enterprise—Kubernetes Manager. This is a job function that more and more companies will need to hire as operating and managing Kubernetes becomes a significantly larger part of the engineering operation than ever before. Let me explain.
• okteto.com: Run your Pull Request Preview Environments on Kubernetes
• allanjohn909.medium.com: Kubernetes Ingress with Traefik, CertManager, LetsEncrypt and HAProxy
• asishmm.medium.com: Discussion on Horizontal Pod Autoscaler with a demo on local k8s cluster
• piotrminkowski.com: Kubernetes Multicluster with Kind and Submariner
• civo.com: Get up and running with Kubeflow on Civo Kubernetes
• blog.nillsf.com: How to run your own admission controller on Kubernetes
• blog.flant.com: Failure stories #2. How to destroy Elasticsearch while migrating it within Kubernetes
• dbafromthecold.com: Adjusting pod eviction time in Kubernetes
• doordash.engineering: Gradual Code Releases Using an In-House Kubernetes Canary Controller Gradual code releases with canary deployments and a custom Kubernetes controller
• itnext.io: How to deploy a cross-cloud Kubernetes cluster with built-in disaster recovery 🌟
• getambassador.io: Getting Started with Kubernetes for JavaScript Developers
• blog.cloudflare.com: Automatic Remediation of Kubernetes Nodes
• pulumi.com: Kubernetes Fundamentals Part One - Python instead of YAML 🌟
• ubuntu.com: How to test the latest Kubernetes 1.22 release candidate with MicroK8s
• thenewstack.io: 10 Steps to a Successful Kubernetes Technical Transformation 🌟
• medium: Kubernetes Scaling & Replicas 🌟 Whenever we talk about “Scaling”, we need to discuss the states of the application. There are two types: Stateful and Stateless Applications.
  • Stateful: A stateful application can remember at least some of the things(from the past) about its state when it runs each time. For example: It stores our preferences, keeps track of window size and location, and remembers what files they have opened recently. Their Attributes are:
    • persistence Storage
    • gracefully deployment and scaling
    • gracefully deletion and termination
    • Automated rolling updates
  • Stateless: A stateless application requests are self-contained, i.e. everything is contained within the request, and handled in two distinct phases - a “request” and a “response.” Their Attributes are:
    • Scaling can be done independently
    • Mortal (Kubernetes Pods are mortal. They are born and when they die, they are not resurrected)
    • No persistence Storage
    • Client Cookies can be used to make service stateless
• cncf.io: Advanced Kubernetes pod to node scheduling
• medium: Create A Pod In Kubernetes Cluster Learn what is Pod and how to create a Pod in the Kubernetes cluster.
• cloudsavvyit.com: How to Scale Docker Containers Across Servers Using Kubernetes
• Kubernetes. Label and Selector. Important Topic. Identify object in cluster. CKA Exam Tips
• thenewstack.io: Cloud Foundry Summit: Kubernetes Must Do Better by Developers
• itnext.io: How to create Kubernetes home lab on an old laptop with K3s
• itnext.io: How to deploy a single Kubernetes cluster across multiple clouds using k3s and WireGuard
• itnext.io: How to Add MySql & MongoDB to a Kubernetes .Net Core Microservice Architecture How to add a MySQL DB and a MongoDB replica set in K8S on Docker desktop using persistent volumes and access the databases from ASP.NET Core, C# and Angular
• itnext.io: Expose Open Policy Agent/Gatekeeper Constraint Violations for Kubernetes Applications with Prometheus and Grafana
• thenewstack.io: How Airbnb and Twitter Cut Back on Microservice Complexities
• Some useful and promising Kubernetes projects to follow:
  • submarinerio multicluster direct networking
  • shipwrightio building container images
  • microcksio testing API and messaging
  • telepresenceio development tool
  • k0sproject new Kubernetes distro
• redkubes.com: DIY Kubernetes-based platform building – part 3
• hobby-kube/guide 🌟 Kubernetes clusters for the hobbyist. This guide answers the question of how to setup and operate a fully functional, secure Kubernetes cluster on a cloud provider such as Hetzner Cloud, DigitalOcean or Scaleway. It explains how to overcome the lack of external ingress controllers, fully isolated secure private networking and persistent distributed block storage.
• wecloudpro.com: Watchers in Kubernetes
• learnk8s.io: Kubernetes wallpapers A collection of free Kubernetes wallpapers for your computer.
• youtube: Tinder's Move to Kubernetes - Chris O'Brien & Chris Thomas, Tinder
• medium: How to enable Kubernetes container RuntimeDefault seccomp profile for all workloads
• doordash.engineering: Gradual Code Releases Using an In-House Kubernetes Canary Controller
• infoq.com: Six Tips for Running Scalable Workloads on Kubernetes
• Assess managed Kubernetes services for your workloads. Managed services from cloud providers can simplify Kubernetes deployment but create some snags in a multi-cloud model. Follow three steps to see if these services can benefit you.
• itnext.io: Evolution of PaaSes to Platform-as-Code in Kubernetes world

kubeconfig

• medium: Mastering the KUBECONFIG file
• rcarrata.github.io: Regenerating Kubeconfig for system:admin user in OpenShift clusters You missed your kubeconfig file of your OpenShift cluster? Your dog ate your kubeconfig file? No worries! Let’s regenerate it in a easy and automated way!

Docker and Kubernetes

• kruyt.org: Migrate from Docker to Containerd in Kubernetes
• opensourcerers.org: How to go from Docker to Kubernetes the right way 🌟
• loft.sh: Docker Compose to Kubernetes: Step-by-Step Migration 🌟
• linuxtechi.com: How to Setup Private Docker Registry in Kubernetes (k8s)
• itnexst.io: Docker and Kubernetes — root vs. privileged
• containerjournal.com: Best of 2020: How Docker and Kubernetes Work Together
• blog.sighup.io: How to run Kubernetes without Docker Sooner or later this moment had to come, and it finally has: Kubernetes is deprecating Docker as a Container Runtime Interface in favor of the other supported runtimes. Let's try to explain why Docker seems really replaceable.
• imaginarycloud.com: Docker VS Kubernetes? It should be Docker + Kubernetes

Kubernetes Cloud Controller Manager

• medium: The Kubernetes Cloud Controller Manager

Kubernetes Resources

• medium: Kubernetes Resources 🌟
• enterprisersproject.com: Managing Kubernetes resources: 5 things to remember Kubernetes automates much of the work of managing containers at scale. But containerized applications commonly share pooled resources, so you need to allocate and manage them properly
• stackify.com: The Advantages of Using Kubernetes and Docker Together
• linuxadvise.com: Kubernetes Node Affinity
• linuxadvise.com: Kubernetes Daemon Sets
• magalix.com: Team Productivity: Resource Management 🌟 Resource Requests, Limits and Quota

Kubernetes Pods

• medium.com: kubernetes Pod Priority and Preemption
• itnext.io: K8s prevent queue worker Pod from being killed during deployment How to prevent a Kubernetes (like RabbitMQ) queue worker Pod from being killed during deployment while handling a message?
• medium: How to configure and manage Pod in Kubernetes Cluster (K8s) There are two types of Pods: Single container pod & Multi container pod.
• howtoforge.com: How to create Multi-Container Pods in Kubernetes
• Discovering Running Pods By Using DNS and Headless Services in Kubernetes When retrieving all service’s connected pods is desired
• Kubernetes Tip: What Happens To Pods Running On Node That Become Unreachable?
• medium: Kubernetes Pod Redundancy Strategies
• medium: Discovering Running Pods By Using DNS and Headless Services in Kubernetes 🌟 When retrieving all service’s connected pods is desired.
• iximiuz.com: Service proxy, pod, sidecar, oh my!
• linuxadvise.com: Kubernetes Static Pods
• linuxadvise.com: Kubernetes Pod Security Policy
• medium: Discovering Running Pods By Using DNS and Headless Services in Kubernetes
• erkanerol.github.io: I wish pods were fully restartable Why are Pod not fully restartable in Kubernetes? Why is Kubernetes not restarting the Pod in CrashLoopBackOff?
• medium: Notes on Graceful Shutdown in Kubernetes 🌟
• didil.medium.com: Building a Kubernetes Mutating Admission Webhook A “magic” way to inject a file into Pod Containers
• thenucleargeeks.com: Introduction to Kubernetes Pods
• speakerdeck.com: Kubernetes Pod internals with the fundamentals of Containers
• kubernetes.io: PodSecurityPolicy Deprecation: Past, Present, and Future 🌟
• dustinspecker.com: IPVS: How Kubernetes Services Direct Traffic to Pods
• returngis.net: Organizar los pods en Kubernetes usando taints y tolerations

Kubernetes ConfigMaps

• medium: ConfigMaps in Kubernetes: how they work and what you should remember 🌟
• medium: ConfigMaps in Kubernetes (K8s)
• itnext.io: Working with kubernetes configmaps, part 1: volume mounts
  • itnext.io: Working with kubernetes configmaps, part 2: Watchers
• blog.gopaddle.io: Strange things you never knew about Kubernetes ConfigMaps on day one 🌟🌟
• k21academy.com: Kubernetes ConfigMaps and Secrets: Guide to Create and Update 🌟
• kubermatic.com: Keeping the State of Apps Part 3: Introduction to ConfigMaps 🌟
• medium: Kubernetes ConfigMaps Explained
• linuxadvise.com: Kubernetes Config Maps

Kubernetes Secrets

• linuxadvise.com: Kubernetes Secrets
• https://blog.newrelic.com/engineering/how-to-use-kubernetes-secrets/

Kubernetes Volumes

• linkedin.com/pulse: What are Kubernetes Persistent Volumes?
• blog.newrelic.com: Kubernetes Fundamentals, Part 5: Working with Kubernetes Volumes

Namespaces and Multi Tenancy. Self Service Namespaces

• Self-Service Kubernetes Namespaces Are A Game-Changer 🌟
• qvault.io: How to Restart All Pods in a Kubernetes Namespace
• medium: How to create Namespaces in Kubernetes? 🌟
• starwindsoftware.com: Remove a Kubernetes namespace blocked with Terminating status
• opensource.com: Configure multi-tenancy with Kubernetes namespaces 🌟 Namespaces provide basic building blocks of access control for applications, users, or groups of users.
• Kubernetes Hierarchical Namespace Controller (slides from Kubernetes Multitenancy Working Group) 🌟
• kubernetes.io: Introducing Hierarchical Namespaces
• Hierarchical namespaces make it easier to share your Kubernetes cluster. For example, you can create additional namespaces under your team's namespace, even if you don't have cluster-level permission to create namespaces
• medium: Kubernetes Multi-Tenancy — A Best Practices Guide 🌟
• vamsitalkstech.com: Kubernetes Multi-tenancy Best Practices & Architecture Model..(2/2)
• loft.sh: Kubernetes Multi-Tenancy: Why Virtual Clusters Are The Best Solution
• kubesphere.io: Kubernetes Multi-tenancy in KubeSphere
• kubernetes.io: Three Tenancy Models For Kubernetes What are your tenancy options with Kubernetes? This post calls out three: by namespace, by cluster, by control plane.
• thenewstack.io: Avoiding the Pitfalls of Multitenancy in Kubernetes
• blog.sighup.io: Hierarchical Namespace Controller (HNC): a look into the future of Kubernetes Multitenancy Hierarchical Namespace Controller (HNC) is bringing a better multi-tenancy model to Kubernetes. In this article we are exploring the current state of the project and useful use-cases.
• vamsitalkstech.com: Introduction to Kubernetes Multi-tenancy..(1/2)
• asonisg.medium.com: Multi-tenancy with Kubernetes (Part-1)
• openshift.com: The Hidden Dangers of Terminating Namespaces 🌟
• medium: Kubernetes Namespaces vs. Virtual Clusters
• engineering.salesforce.com: Project Agumbe: Share Objects Across Namespaces in Kubernetes 🌟

Creating Users

• cloudhero.io Creating Users for your Kubernetes Cluster. Learn how to use x509 certificates to authenticate users in your cluster.

Kubernetes Labels and Selectors

• sandeepbaldawa.medium.com: K8s Labels & Selectors In this post, we will look at What Kubernetes(K8s) Labels and Selectors are, Why do we need them, How to use them.
• blog.kubecost.com: The Guide to Kubernetes Labels
• millionvisit.blogspot.com: Kubernetes for Developers #8: Kubernetes Object Name, Labels, Selectors and Namespace
• millionvisit.blogspot.com: Kubernetes for Developers #11: Pod Organization using Labels
• linuxadvise.com: Kubernetes Node Selectors
• ithands-on.com: Kubernetes 101 : Changing a Pod's label on the fly
• blog.newrelic.com: Kubernetes Fundamentals, Part 4: How to Organize Clusters

Kubernetes Taints and Tolerations

• thenucleargeeks.com: Taints and Tolerations in Kubernetes

Kubernetes Deployment, Rollling Updates and Rollbacks

• medium: How to Deploy a Web Application with Kubernetes Learn how to create a Kubernetes cluster from scratch and deploy a web application (SPA+API) in two hours.
• itnext.io: Kubernetes rolling updates, rollbacks and multi-environments
• linuxadvise.com: Kubernetes Rolling Updates and Rollbacks
• medium: How Rolling and Rollback Deployments work in Kubernetes
• medium: Kubernetes Deployment — Rolling Updates and Rollbacks Explained Learn how to update the application once created a Deployment in the Kubernetes cluster and how to rollback.
• thenewstack.io: How do applications run on kubernetes?
• deepsource.io: Breaking down zero downtime deployments in Kubernetes An in-depth analysis of deployments in Kubernetes
• k21academy.com: Kubernetes Deployment and Step-by-Step Guide to Deployment: Update, Rollback, Scale & Delete
• medium: Kubernetes Deployment: Connect Your Front End to Your Back End With Nginx
• sbg.technology: Zero-Downtime Kubernetes Deployments
• Zero-Downtime Kubernetes Deployments
• mirantis.com: Introduction to YAML: Creating a Kubernetes deployment
• medium: Kubernetes Deployment Explained Learn what is Deployment in the Kubernetes cluster and learn the advantages of the Deployment object.
• redhat.com: 10 considerations for Kubernetes deployments - Checklist
• learnk8s.io: Graceful shutdown and zero downtime deployments in Kubernetes
• thoughtbot.com: Zero Downtime Rails Deployments with Kubernetes
• medium: Deployment types in Kubernetes
• hackernoon.com: How To Deploy Code Faster Using Kubernetes
• fosstechnix.com: Rolling out and Rolling back updates with Zero Downtime on Kubernetes Cluster
• medium: 5 Things We Overlooked When Deploying Our First App on Kubernetes
• Our Journey to Zero Downtime Rolling Updates with Ambassador In this article you will cover: How Kubernetes lifecycle hooks can be used to shutdown applications gracefully. How pods are removed from the system and why it is necessary to understand and carefully handle the shutdown sequence appropriately.
• medium: Kubernetes Tip: How Statefulsets Behave Differently Than Deployments When Node Fails? What happens to the Pods when a node fails in Kubernetes?
• learnsteps.com: Basics on Kubernetes: What exactly is a deployment?
• polarsquad.com: Check your Kubernetes deployments!

Kubernetes StatefulSet

• medium: Kubernetes — Difference between Deployment and StatefulSet in K8s
• kubermatic.com: Keeping the State of Apps 6: Introduction to StatefulSets

Kubernetes Jobs and Cron Jobs

• ithands-on.com: Kubernetes 101 : Performing tasks in kubernetes - Jobs
• How we learned to improve Kubernetes CronJobs at Scale (Part 1 of 2)
  • How we learned to improve Kubernetes CronJobs at Scale (Part 2 of 2)
• opensource.com: A beginner's guide to Kubernetes Jobs and CronJobs Use Jobs and CronJobs to control and manage Kubernetes pods and containers.
• medium: Jobs & Cronjobs in Kubernetes Cluster
• devopscube.com: How To Create Kubernetes Jobs/Cron Jobs – Getting Started Guide

Kubernetes Deployment Strategies

• youtube: deployment strategies in kubernetes | recreate | rolling update | blue/green | canary
• auth0.com: Deployment Strategies In Kubernetes Learn what are the different deployment strategies available in Kubernetes and how to use them.
• educative.io: A deep dive into Kubernetes Deployment strategies
• weave.works: Kubernetes Deployment Strategies
• sivalabs.in: Kubernetes - Blue/Green Deployments
• medium.com: Kubernetes Canary Deployment #1 Gitlab CI
• semaphoreci.com: Continuous Blue-Green Deployments With Kubernetes
• medium: Fully automated canary deployments in Kubernetes

Kubernetes API

• kubernetes.io: Kubernetes API
• thenewstack.io: Living with Kubernetes: API Lifecycles and You
• blog.tilt.dev: Kubernetes is so Simple You Can Explore it with Curl
• learndevops.substack.com: Hitting prometheus API with curl and jq 🌟 Determine offending pods that use more RAM than requested, causing OOM, with Prometheus and jq.
• thenewstack.io: Kubernetes Is Not Just About Containers — It’s About the API 🌟
• kubernetes.io: Alpha in Kubernetes v1.22: API Server Tracing
• evancordell.com: 16 things you didn't know about Kube APIs and CRDs

Kubernetes Health Checks/Probes. Startup, Liveness, Readiness

• medium: How to Perform Health checks in Kubernetes (K8s)
• If you have a livenessProbe that takes over one second, it’ll fail when you update to kubernetes 1.20, because a long-standing bug with how the default was handled has been fixed. You must override the ExecProbeTimeout if your probe takes more than 1s
• Liveness and Readiness Probes for Kubernetes in Phoenix application
• Kubernetes Liveness and Readiness Probes
• loft.sh: Kubernetes Readiness Probes - Examples & Common Pitfalls
• millionvisit.blogspot.com: Kubernetes for Developers #12: Effective way of using K8 Liveness Probe
• millionvisit.blogspot.com: Kubernetes for Developers #13: Effective way of using K8 Readiness Probe
• andrewlock.net: Deploying ASP.NET Core applications to Kubernetes - Part 6 - Adding health checks with Liveness, Readiness, and Startup probes
• itnext.io: Kubernetes Probes: Startup, Liveness, Readiness
• itnext.io: Kubernetes Readiness Probes — Examples & Common Pitfalls
• youtube: Kubernetes 101: Get Better Uptime with K8s Health Checks
• returngis.net: Pruebas de vida de nuestros contenedores en Kubernetes
• blog.newrelic.com: Kubernetes Fundamentals, Part 2: How to Use Health Checks

Kubernetes Limits

• kubernetes.io Policy Limit Ranges
• sysdig.com: Understanding Kubernetes limits and requests by example
• dev.to/aurelievache: Understanding Kubernetes: part 22 – LimitRange
• dzone: Dive Deep Into Resource Requests and Limits in Kubernetes This article will be helpful for you to understand how Kubernetes requests and limits work, and why they can work in an expected way.
• sysdig.com: How to rightsize the Kubernetes resource limits
• medium: Understanding resource limits in kubernetes: cpu time
• blog.newrelic.com: Kubernetes Fundamentals, Part 1: How to Manage Cluster Capacity with Requests and Limits

Kube Scheduler

• All you need to know to get started with the Kube Scheduler

Kubernetes etcd

• medium: How to modify etcd data of your Kubernetes directly (without K8s API)
• medium: Getting Started with Kubernetes etcd
• sysdig.com: How to monitor etcd Learning how to monitor etcd is of vital importance when running Kubernetes in production. Monitoring etcd will let you validate that things work as expected, while detecting and troubleshooting issues that could take your entire infrastructure down.
• learnk8s.io: How etcd works with and without Kubernetes
• itnext.io: Breaking down and fixing etcd cluster

Kubernetes Sidecars

• bsucaciu.com: What is a Sidecar?
• medium: Kubernetes — Learn Sidecar Container Pattern Understanding Sidecar Container Pattern With an Example Project
• ithands-on.com: Kubernetes 101 : Extending the container's functionalities - Sidecar containers

Kubernetes Annotations

• kubernetes.io: Annotating Kubernetes Services for Humans A Convention for annotations in Kubernetes.

Kubernetes Best Practices and Tips

• blog.pipetail.io: 10 most common mistakes using kubernetes
• Optimize Kubernetes cluster management with these 5 tips Effective Kubernetes cluster management requires operations teams to balance pod and node deployments with performance and availability needs.
• techradar.com: Three tips to implement Kubernetes with open standards
• 10 most common mistakes when using Kubernetes
  • resources - requests and limits
  • liveness and readiness probes
  • LoadBalancer for every http service
  • non-kubernetes-aware cluster autoscaling
  • Not using the power of IAM/RBAC
• geekflare.com: 10 Kubernetes Best Practices for Better Container Orchestration
• wideops.com: Kubernetes best practices: Setting up health checks with readiness and liveness probes
• containerjournal.com: 10 Best Practices Worth Implementing to Adopt Kubernetes
• medium: Kubernetes Tip: How Does OOMKilled Work?
• cloud.google.com: Kubernetes Best Practices A collection of blog posts aimed at guide you through the Kubernetes best practices
• releasehub.com: Kubernetes Health Checks - 2 Ways to Improve Stability in Your Production Applications
• stackpulse.com: Kubernetes and SRE: 5 Best Practices for K8s Reliability in Production
• fairwinds.com: Never Should You Ever In Kubernetes: #1 Do K8S The Hard Way
• fairwinds.com: Never Should You Ever In Kubernetes Part 2: Kubernetes Security Mistakes
• fairwinds.com: Never Should You Ever In Kubernetes Part 3: 6 K8s Reliability Mistakes
• fairwinds.com: Never Should You Ever In Kubernetes Part 4: Three K8s Efficiency Mistakes
• stackpulse.com: Challenges of Running Services With K8s Reliably
• blog.lukechannings.com: Mistakes made and lessons learned with Kubernetes and GitOps
• fairwinds.com: An Intro to Kubernetes Best Practices: Start Your K8s Right
• itnext.io: Lifecycle of Kubernetes Network Policies and Best Practices In this blog post, you'll learn the lifecycle of Kubernetes Network Policies (e.g. creation, editing, governance, debugging)
• learnk8s.io: Kubernetes production best practices A curated checklist of best practices designed to help you release to production.
• github.com/PacktPublishing: Kubernetes in Production Best Practices
• medium: 10 Most Common Mistakes When Using Kubernetes Avoid your cluster from falling over in production by implementing these best practices
• thenewstack.io: 5 Best Practices for Configuring Kubernetes Pods Running in Production
• containiq.com: Setting and Rightsizing Kubernetes Resource Limits | Best Practices Part of managing a Kubernetes cluster is making sure your clusters aren’t using too many resources. Let’s walk through the concepts of setting and rightsizing resource limits for Kubernetes.
• freecodecamp.org: How to Make Your Enterprise Kubernetes Environment Secure, Efficient, and Reliable
• geekflare.com: Diez mejores prácticas de Kubernetes para una mejor orquestación de contenedores

Disruptions

• thenewstack.io: Kubernetes: Use PodDisruptionBudgets for Application Maintenance and Upgrades

Cost Estimation Strategies

• cncf.io: 5 Problems with Kubernetes Cost Estimation Strategies
• loft.sh: How To Reduce Your Kubernetes Cost
• harness.io: Getting Started with Cloud Cost Optimization
• rancher.com: Gain Better Visibility into Kubernetes Cost Allocation
• loft.sh: Kubernetes Cost Savings By Reducing The Number Of Clusters
• thenewstack.io: 5 Essential Tips to Manage Kubernetes Costs
• opensource.com: 3 ways Kubernetes optimizes your IT budget Automation is not only good for IT, it's also beneficial to your company's bottom line.
• thenewstack.io: 5 Expensive Kubernetes Cost Traps and How to Deal with Them
• KubeSurvival Significantly reduce Kubernetes costs by finding the cheapest machine types that can run your workloads
• containerjournal.com: Assessing the True Cost of Kubernetes
• ubuntu.com: Kubernetes Fully Managed – half the cost of AWS
• learnk8s.io: Kubernetes Instance Calculator 🌟🌟🌟

kubecost

• How to track costs in multi-tenant Amazon EKS clusters using Kubecost
• infracloud.io: Kubernetes Cost Reporting using Kubecost
• github.com/kubecost: kubecost-exporter - Running Kubecost as a Prometheus metric exporter
• blog.kubecost.com: Kubecost raises $5.5 million to help teams monitor and reduce their Kubernetes spend
• kubectl-cost is a kubectl plugin that provides easy CLI access to Kubernetes cost allocation metrics via the kubecost APIs. It allows developers, devops, and others to quickly determine the cost & efficiency for any Kubernetes workload
• blog.kubecost.com: AKS Cost Monitoring and Governance With Kubecost
• thenewstack.io: KubeCost: Monitor Kubernetes Costs with kubectl

Kubernetes Resource and Capacity Management. Capacity Planning

• itnext.io: Kubernetes Resource Management in Production Requests, Limits, Overcommitment, Slack/Waste, Throttling
• medium: Ultimate Kubernetes Resource Planning Guide
• learnk8s.io: Setting the right requests and limits in Kubernetes 🌟 By far the best read on requests and limits in Kubernetes.
• openshift.com: Sizing Applications in Kubernetes
• magalix.com: Capacity Planning When we have multiple Pods with different Priority Class values, the admission controller starts by sorting Pods according to their priority. What happens when there are no nodes with available resources to schedule a high-priority pods?
• sysdig.com: Kubernetes capacity planning: How to rightsize the requests of your cluster

Kubernetes Monitoring

• kube-prometheus Use Prometheus to monitor Kubernetes and applications running on Kubernetes. This repository collects Kubernetes manifests, Grafana dashboards, and Prometheus rules combined with documentation and scripts to provide easy to operate end-to-end Kubernetes cluster monitoring with Prometheus using the Prometheus Operator.
• medium: Kubernetes Monitoring: Kube-State-Metrics
• Kubernetes Monitoring 101 — Core pipeline & Services Pipeline
• medium: Utilizing and monitoring kubernetes cluster resources more effectively
• sysdig.com: Seven Kubernetes monitoring best practices every monitoring solution should enable
• magalix.com: Best Practices And Tools For Monitoring Your Kubernetes Cluster
• sysdig.com: Monitoring Kubernetes in Production
• sysdig.com: How to monitor Kubernetes control plane
• thenewstack.io: 12 Critical Kubernetes Health Conditions You Need to Monitor
• devopscurry.com: Best Open-Source Monitoring Tools for Kubernetes in 2021
• circonus.com: 12 Critical Kubernetes Health Conditions You Need to Monitor and Why
• circonus.com: Guide to Kubernetes Monitoring: Part 1
  • circonus.com: Guide to Monitoring Kubernetes, Part 2: Which Metrics and Health Conditions You Should be Monitoring
• infracloud.io: Monitoring Kubernetes cert-manager Certificates with BotKube - botkube.io
• kube-state-metrics Add-on agent to generate and expose cluster-level metrics. kube-state-metrics is a simple service that listens to the Kubernetes API server and generates metrics about the state of the objects. (See examples in the Metrics section below.) It is not focused on the health of the individual Kubernetes components, but rather on the health of the various objects inside, such as deployments, nodes and pods.
• itnext.io: Monitoring Kubernetes Jobs
• cncf.io: Avoiding Kubernetes cluster outages with synthetic monitoring
• medium: Replication Controller & Replica sets in Kubernetes
• kubermatic.com: The Complete Guide to Kubernetes Metrics
• arabitnetwork.com: K8S – Enabling Auditing Logs | Step-by-Step

Logging in Kubernetes

• cncf.io: Logging in Kubernetes: EFK vs PLG Stack
• medium: How to Deploy an EFK stack to Kubernetes
• digitalocean.com: How To Set Up an Elasticsearch, Fluentd and Kibana (EFK) Logging Stack on Kubernetes
• portworx.com: How to backup and restore Elasticsearch on Kubernetes
• elastic.co: Elastic Stack Monitoring with Elastic Cloud on Kubernetes (ECK - official operator) In this blog post, we'll explore how the official ElasticCloud on Kubernetes operator can be used to easily deploy and manage ElasticStack Monitoring using the new Beat CRD.

• papertrail.com: Quick and Easy Way to Implement Kubernetes Logging The SolarWinds® Papertrail™ team is excited to announce SolarWinds rKubeLog, an open-source project designed to streamline Kubernetes logging. rKubeLog allows you to forward logs to Papertrail from within a Kubernetes cluster without using a daemon or setting up application-level logging or a logging sidecar.
• qlinh.com: Leveraging Kubernetes audit logs for threat detection Kubernetes audit logs can provide great visibility into the operation and inner workings of your cluster. Learn how to leverage Kubernetes audit logs for threat detection

ECK Elastic Cloud on Kubernetes

• elastic.co: How to configure Elastic Cloud on Kubernetes with SAML and hot-warm-cold architecture Elastic Cloud on Kubernetes (ECK) is an easy way to get the Elastic Stack up and running on top of Kubernetes. That’s because ECK automates the deployment, provisioning, management, and setup of Elasticsearch, Kibana, Beats, and more.

Architecting Kubernetes clusters. Node Size. Multi Clusters and Hybrid Cloud

• learnk8s.io: Architecting Kubernetes clusters — how many should you have?
• learnk8s.io: Architecting Kubernetes clusters — choosing a worker node size This article discusses the pros and cons of having either many small clusters or few large clusters for running a given set of apps.
  • itnext.io: Architecting Kubernetes clusters — choosing a worker node size
• itnext.io: Architecting Kubernetes clusters — choosing a cluster size
• learnk8s.io: Allocatable memory and CPU in Kubernetes Nodes
• docs.google.com - learnk8s.io: Research on the trade offs when choosing an instance type for a kubernetes cluster
• medium: Deploying Kubernetes — Deciding the size of your nodes
• dzone refcard: Kubernetes Multi-Cluster Management and Governance
• thenewstack.io: A Deep Dive into Architecting a Kubernetes Infrastructure
• thenewstack.io: Manage Multicluster Kubernetes with Operators
• kubernetes.io: Out of the Clouds onto the Ground: How to Make Kubernetes Production Grade Anywhere
• cncf.io: Simplifying multi-clusters in Kubernetes
• platform9.com: Difference Between multi-cluster, multi-master, multi-tenant & federated Kubernetes
• datacenterknowledge.com: The Pros and Cons of Kubernetes-Based Hybrid Cloud
• thenewstack.io: 4 ways to run kubernetes in production
• medium: Individual Kubernetes Clusters vs. Shared Kubernetes Clusters for Development
• nginx.com: Reduce Complexity with Production-Grade Kubernetes
• elastisys.com: What do I need to add on top of Kubernetes?
• platform9.com: Kubernetes Cluster Sizing – How Large Should a Kubernetes Cluster Be?

Client Libraries for Kubernetes

• Client Libraries for Kubernetes

Helm Kubernetes Tool

• Helm

Templating YAML in Kubernetes with real code. YQ YAML processor

• Templating YAML in Kubernetes with real code
  • TL;DR: You should use tools such as yq and kustomize to template YAML resources instead of relying on tools that interpolate strings such as Helm.
  • If you're working on large scale projects, you should consider using real code — you can find hands-on examples on how to programmatically generate Kubernetes resources in Java, Go, Javascript, C# and Python in this repository.

Quality Checks for Kubernetes YAMLs

• dev.to: Automating quality checks for Kubernetes YAMLs

Extending Kubernetes

Adding Custom Resources. Extending Kubernetes API with Kubernetes Resource Definitions. CRD vs Aggregated API

• Custom Resources
• itnext.io: CRD is just a table in Kubernetes
• Use a custom resource (CRD or Aggregated API) if most of the following apply:
  • You want to use Kubernetes client libraries and CLIs to create and update the new resource.
  • You want top-level support from kubectl; for example, kubectl get my-object object-name.
  • You want to build new automation that watches for updates on the new object, and then CRUD other objects, or vice versa.
  • You want to write automation that handles updates to the object.
  • You want to use Kubernetes API conventions like .spec, .status, and .metadata.
  • You want the object to be an abstraction over a collection of controlled resources, or a summarization of other resources.
• Kubernetes provides two ways to add custom resources to your cluster:
  • CRDs are simple and can be created without any programming.
  • API Aggregation requires programming, but allows more control over API behaviors like how data is stored and conversion between API versions.
• Kubernetes provides these two options to meet the needs of different users, so that neither ease of use nor flexibility is compromised.
• Aggregated APIs are subordinate API servers that sit behind the primary API server, which acts as a proxy. This arrangement is called API Aggregation (AA). To users, it simply appears that the Kubernetes API is extended.
• CRDs allow users to create new types of resources without adding another API server. You do not need to understand API Aggregation to use CRDs.
• Regardless of how they are installed, the new resources are referred to as Custom Resources to distinguish them from built-in Kubernetes resources (like pods).

Krew, a plugin manager for kubectl plugins

• Krew is the plugin manager for kubectl command-line tool.

• itnext.io: Extending Kubernetes Cluster; Kubectl Plugins and Krew

• darumatic.com: Improve Kubectl Command with Krew Krew is a tool that aims to ease plugin discovery, installation, upgrade, and removal on multiple operating systems. This article will show you how easy it is to grab and experiment with existing plugins.

• kubectl trace is now on the krew index!! Go install it now!

  kubectl krew install trace
  

  And then just try to snoop into all the file openings:

  kubectl trace run -a  <yournode>  -e 'kprobe:do_sys_open { printf("%s: %s\n", comm, str(arg1)) }'
  

OpenKruise/Kruise

• openkruise.io
• OpenKruise/Kruise
• thenewstack.io: Introducing CloneSet: A Production-Grade Kubernetes Deployment CRD

Crossplane, a Universal Control Plane API for Cloud Computing. Crossplane Workloads Definitions

• Crossplane

Kubernetes Community

Community Forums

• Community Forums🌟

Kubernetes Special Interest Groups (SIGs)

• Kubernetes Special Interest Groups (SIGs) have been around to support the community of developers and operators since around the 1.0 release. People organized around networking, storage, scaling and other operational areas.
• SIG Apps: build apps for and operate them in Kubernetes

Kubernetes SIG's Repos

• Kubernetes SIGs Org for Kubernetes SIG-related work.
• ExternalDNS: Configure external DNS servers (AWS Route53, Google CloudDNS and others) for Kubernetes Ingresses and Services
• Kubernetes-Secrets-Store-CSI-Driver: Secrets Store CSI driver for Kubernetes secrets Integrates secrets stores with Kubernetes via a CSI volume.
• kustomize Customization of kubernetes YAML configurations.

Kubectl Plugins

• Available kubectl plugins
• Awesome Kubectl plugins
• Extend kubectl with plugins
• youtube: Welcome to the world of kubectl plugins
• padok.fr: Getting started with kubectl plugins 5 useful kubectl plugins:
  • whoami
  • access-matrix
  • neat
  • tree
  • node-shell
• kubectl-trace kubectl trace is a kubectl plugin that allows you to schedule the execution of bpftrace programs in your Kubernetes cluster.
• pixelstech.net: Build a Kubectl Plugin from Scratch
• k8scr A kubectl plugin for pushing OCI images through the Kubernetes API server.

Enforcing Policies and governance for kubernetes workloads with Conftest

• Accelerated Feedback Loops when Developing for Kubernetes with Conftest Learn how to validate Kubernetes resources with Conftest for faster feedback loops
  • open-policy-agent/conftest
  • Enforcing policies and governance for Kubernetes workloads
• Deprek8ion is a set of rego policies to monitor Kubernetes APIs deprecations and designed to work with conftest.
• k8s-worker-pod-autoscaler scales the replicas in a deployment based on observed queue length.
• kubectl-prune / kubectl-reap is a kubectl plugin that prunes unused Kubernetes resources.
• kconnect - The Kubernetes Connection Manager CLI kconnect is a CLI utility that can be used to discover and securely access Kubernetes clusters across multiple operating environments. Based on the authentication mechanism chosen the CLI will discover Kubernetes clusters you are allowed to access in a target hosting environment (i.e. EKS, AKS, Rancher) and generate a kubeconfig for a chosen cluster.
• konstraint is a CLI tool to assist with the creation and management of templates and constraints when using Gatekeeper.
• 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.

Kubernetes Troubleshooting

• Kubernetes troubleshooting diagram
• Understanding Kubernetes cluster events
• nigelpoulton.com: Troubleshooting kubernetes service discovery - Part 1
• medium: 5 tips for troubleshooting apps on Kubernetes
• managedkube.com: Troubleshooting a Kubernetes ingress
• medium.com: Kubernetes Tip: How To Disambiguate A Pod Crash To Application Or To Kubernetes Platform? (CrashLoopBackOff)
• veducate.co.uk: How to fix in Kubernetes – Deleting a PVC stuck in status “Terminating”
• thenewstack.io: 5 Best Practices to Back up Kubernetes
• tennexas.com: Kubernetes Troubleshooting Examples
• levelup.gitconnected.com: 5 tips for troubleshooting apps on Kubernetes
• medium: Common Kubernetes Errors Made by Beginners [2021]🌟
• cloud.redhat.com: Troubleshooting Sandboxed Containers Operator
• komodor.com: Kubernetes Troubleshooting: The Complete Guide
• andydote.co.uk: The Problem with CPUs and Kubernetes
• kinvolk.io: Investigating Kubernetes performance issues with BPF
• medium: Better Debugging Environment for your Micro-Services

[{: style="width:30%"}](https://learnk8s.io/troubleshooting-deployments)

Provisioning cloud resources (AWS, GCP, Azure) in Kubernetes

• learnk8s.io: Provisioning cloud resources (AWS, GCP, Azure) in Kubernetes

Debugging Techniques and Strategies. Debugging with ephemeral containers

• kubectl-debug
• kubesandclouds.com: Debugging with ephemeral containers in K8s (v1.18+)
• How to quarantine pods
• KDBG: Small Kubernetes debugging container KDBG (Kubernetes Debuger) is a small docker container based on lastest Alpine Linux image, used for debugging Kubernetes clusters from inside a pod.
• inspektor-gadget Collection of gadgets for debugging and introspecting Kubernetes applications using BPF
  • kinvolk.io
• learnk8s.io: A visual guide on troubleshooting Kubernetes deployments
• StatusBay is a tool that provides the missing visibility into the K8S deployment process. The main goal is to ease the experience of troubleshooting and debugging services in K8S and provide confidence while making changes.
• medium: Better Debugging Environment for your Micro-Services
• codefresh.io: Using Telepresence 2 for Kubernetes debugging and local development
• towardsdatascience.com: The Easiest Way to Debug Kubernetes Workloads The fastest and easiest way to debug and troubleshoot any application running on Kubernetes
• tetrate.io: How to debug microservices in Kubernetes with proxy, sidecar or service mesh?
• rookout.com: The Definitive Guide To Kubernetes Application Debugging
• thorsten-hans.com: Debugging apps in Kubernetes with Bridge Bridge to Kubernetes simplifies and streamlines the process of debugging applications running in Kubernetes. Debug any language using the tools you prefer and love.
  • marketplace.visualstudio.com: Bridge to Kubernetes (VSCode)
  • marketplace.visualstudio.com: Bridge to Kubernetes (Visual Studio) Bridge to Kubernetes for Visual Studio 2019

Kubernetes Tutorials

• kubernetes.io: Kubernetes Tutorials Official documentation from Kubernetes. One can go through this official documentation and can learn much more about Kubernetes.
• devopscube.com: Kubernetes Tutorials For Beginners: Getting Started Guide
• Intoduction to Kubernetes (slides, beginners and advanced)
• medium.com: Kubernetes 101: Pods, Nodes, Containers, and Clusters
• medium.com: Learn Kubernetes in Under 3 Hours: A Detailed Guide to Orchestrating Containers
• kubernetestutorials.com: Install and Deploy Kubernetes on CentOs 7
• medium.com: Simplifying orchestration with Kubernetes
• aquasec.com: 70 Best Kubernetes Tutorials Valuable Kubernetes tutorials from multiple sources, classified into the following categories: Kubernetes AWS and Azure tutorials, networking tutorials, clustering and federation tutorials and more.
• cloud.google.com: kubernetes comic Learn about kubernetes and how you can use it for continuous integration and delivery.
• magalix.com: Kubernetes 101 - Concepts and Why It Matters
• Google Play: Learning Solution - Learn Kubernetes
• Google Play: TomApp - Learn Kubernetes
  • apkplz.net: Learn Kubernetes 1 APK
  • Google Play Search
• Dzone refcard: Getting Started with Kubernetes
• dzone: The complete kubernetes collection tutorials and tools
• dzone: kubernetes in 10 minutes a complete guide to look
• magalix.com: The Best Kubernetes Tutorials
• 35 Advanced Tutorials to Learn Kubernetes
• geekflare.com: 14 Kubernetes Tutorials for Beginner to Master
• freecodecamp.org: The Kubernetes Handbook
• youtube: Kubernetes Pods and ReplicaSets explained
• medium: DraftKings Kubernetes Workshop: Hands-on Learning in K8s (with Video Walkthrough)
• 100 Days Of Kubernetes: 100daysofkubernetes.io 100 Days of Kubernetes is the challenge in which we aim to learn something new related to Kubernetes each day across 100 Days!!!
• youtube playlist: Thetips4you - Kubernetes Tutorial for Beginners HPA, Deployments, YAML, Jenkins, etc.
• youtube playlist: DevNation Lessons: Kubernetes Fundamentals
• amazee.io: Master the Fundamentals of K8s: Kubernetes 101 video series with Jeff Geerling
• medium: How to deploy StatefulSets in Kubernetes (K8s)?
• millionvisit.blogspot.com. Kubernetes for Developers Journey:
  • millionvisit.blogspot.com: Kubernetes for Developers #1: Kubernetes Architecture and Features
  • millionvisit.blogspot.com: Kubernetes for Developers #2: Kubernetes for Local Development
  • millionvisit.blogspot.com: Kubernetes for Developers #3: kubectl CLI
  • millionvisit.blogspot.com: Kubernetes for Developers #4: Enable kubectl bash autocompletion
  • millionvisit.blogspot.com: Kubernetes for Developers #5: Kubernetes Web UI Dashboard
  • millionvisit.blogspot.com: Kubernetes for Developers #6: Kubernetes Objects
  • millionvisit.blogspot.com: Kubernetes for Developers #7: Imperative vs. Declarative Kubernetes Objects
  • millionvisit.blogspot.com: Kubernetes for Developers #9: Kubernetes Pod Lifecycle
  • millionvisit.blogspot.com: Kubernetes for Developers #10: Kubernetes Pod YAML manifest in-detail
  • millionvisit.blogspot.com: Kubernetes for Developers #14: Kubernetes Deployment YAML manifest in-detail
• ithands-on.com:
  • ithands-on.com: Kubernetes 101 : Deployments, replicaSets, services, pods and endpoints
  • ithands-on.com: Kubernetes 101 : An overview of StatefulSets and Deployments
  • ithands-on.com: Kubernetes 101 : Resource Quotas (ResourceQuota) and Limit Ranges (LimitRange)
  • ithands-on.com: Kubernetes 101 : Deployments and Rolling updates - maxSurge, maxUnavailable
  • ithands-on.com: Kubernetes 101 : The externalName service

Online Training

• katacoda.com Interactive Learning and Training Platform for Software Engineers
• kubernetesbyexample.com
• Play with Kubernetes A simple, interactive and fun playground to learn Kubernetes
• udemy.com: Learn DevOps: The Complete Kubernetes Course
  • wardviaene/kubernetes-course
• udemy.com: Learn DevOps: Advanced Kubernetes Usage
  • wardviaene/advanced-kubernetes-course
• Certified Kubernetes Administrator CKA course notes — diagrams for each subject area and use as reference for future refresher
• javarevisited.blogspot.com: Top 5 Free Courses to Learn Kubernetes for Developers and DevOps Engineers

K8s Diagrams

• cloudogu/k8s-diagrams A collection of diagrams explaining kubernetes by cloudogu, written in PlantUML.

Kubernetes Patterns and Antipatterns. Service Discovery

• github.com/k8spatterns/examples Examples for "Kubernetes Patterns - Reusable Elements for Designing Cloud-Native Applications"
• kubernetes.io: container design patterns
• magalix.com: Kubernetes Patterns - The Service Discovery Pattern
• gardener.cloud: Kubernetes Antipatterns
• dzone.com: Performance Patterns in Microservices-Based Integrations
• developers.redhat.com: Top 10 must-know Kubernetes design patterns
• medium: 10 Anti-Patterns for Kubernetes Deployments Common practices in Kubernetes deployments that have better solutions
• learnsteps.com: How Kubernetes works on reconciler pattern
• learncloudnative.com: Sidecar Container Pattern
• towardsdatascience.com: Kubernetes pattern for applications with external environment configuration Learn how to decouple configuration from the application using git-sync, Kubernetes init-containers, ConfigMaps and volumes.
• codefresh.io: Kubernetes Deployment Antipatterns – part 1
• codefresh.io: Kubernetes Deployment Antipatterns – part 2
• iximiuz.com: Service discovery in Kubernetes - combining the best of two worlds
• github.com/sharadbhat/KubernetesPatterns: YAML and Golang implementations of common Kubernetes patterns
• developers.redhat.com: Kubernetes configuration patterns, Part 1: Patterns for Kubernetes primitives
  • developers.redhat.com: Kubernetes configuration patterns, Part 2: Patterns for Kubernetes controllers
• learnk8s.io: Extending applications on Kubernetes with multi-container pods Can you change an application without changing any code in Kubernetes? You can when you use multiple containers in a single Pod. Developing and deploying new apps in Kubernetes is easy. But what about legacy apps? In Kubernetes, you can use multiple containers in a Pod to change how your application works.
• dev.to: Kubernetes Deployment Antipatterns – part 1
• ishantgaurav.in: Kubernetes – Sidecar Container Pattern
• developers.redhat.com: Kubernetes configuration patterns, Part 1: Patterns for Kubernetes primitives
• betterprogramming.pub: 10 Anti-Patterns for Kubernetes Deployments Common practices in Kubernetes deployments that have better solutions
• medium: Kubernetes — Learn Init Container Pattern Understanding Init Container Pattern With an Example Project.
• weave.works: Tools for Automating and Implementing Cloud Native Patterns

Kubernetes Scheduling and Scheduling Profiles

• Kubernetes Scheduling
• Scheduling Profiles

Assigning Pods to Nodes. Pod Affinity and Anti-Affinity

• Affinity and anti-affinity

Pod Topology Spread Constraints and PodTopologySpread Scheduling Plugin

• Pod Topology Spread Constraints
• Introducing PodTopologySpread plugin

Cloud Development Kit (CDK) for Kubernetes

• cdk8s.io Define Kubernetes apps and components using familiar languages. cdk8s is an open-source software development framework for defining Kubernetes applications and reusable abstractions using familiar programming languages and rich object-oriented APIs. cdk8s apps synthesize into standard Kubernetes manifests which can be applied to any Kubernetes cluster.
• github.com/awslabs/cdk8s

AWS Cloud Development Kit (AWS CDK)

• AWS: Introducing CDK for Kubernetes
• Traditionally, Kubernetes applications are defined with human-readable, static YAML data files which developers write and maintain. Building new applications requires writing a good amount of boilerplate config, copying code from other projects, and applying manual tweaks and customizations. As applications evolve and teams grow, these YAML files become harder to manage. Sharing best practices or making updates involves manual changes and complex migrations.
• YAML is an excellent format for describing the desired state of your cluster, but it is does not have primitives for expressing logic and reusable abstractions. There are multiple tools in the Kubernetes ecosystem which attempt to address these gaps in various ways:
  • kustomize Customization of kubernetes YAML configurations
  • jsonnet data templating language
    • jsonnet.org
  • jkcfg Configuration as Code with ECMAScript
    • jkcfg.github.io
  • kubecfg A tool for managing complex enterprise Kubernetes environments as code.
  • kubegen Simple way to describe Kubernetes resources in a structured way, but without new syntax or magic
  • Pulumi
• We realized this was exactly the same problem our customers had faced when defining their applications through CloudFormation templates, a problem solved by the AWS Cloud Development Kit (AWS CDK), and that we could apply the same design concepts from the AWS CDK to help all Kubernetes users.

Serverless with OpenFaas and Knative

• Serverless Architectures

[](https://www.xenonstack.com/blog/serverless-openfaas-java/)

Multi-Cluster Federation. Hybrid Cloud Setup Tools

KubeFed

• KubeFed: Kubernetes Cluster Federation

KubeCarrier

• KubeCarrier

Red Hat Operator Lifecycle Manager (OLM)

• Red Hat OLM operator-lifecycle-manager is a management framework for extending Kubernetes with Operators. OLM extends Kubernetes to provide a declarative way to install, manage, and upgrade Operators and their dependencies in a cluster.

Istio Service Mesh

• Istio

Kubernetes Scripts

• Kubernetes Scripts
• Get applied and effective apiVersion from Kubernetes objects

Kubernetes and Ansible

• itnext.io: Automating System Updates for Kubernetes Clusters using Ansible
• Ansible for devops: Kubernetes

Spot instances in Kubernetes

• itnext.io: Embracing failures and cutting infrastructure costs: Spot instances in Kubernetes

Kubernetes Incident Report Plan IRP

• cynet.com: Incident Report Plan (IRP)
• kubermatic.com: A Framework for Kubernetes Incident Response

Kubernetes interview questions

• Kubernetes Interview Questions and Answers 2019 2020
• intellipaat.com: Top Kubernetes Interview Questions and Answers
• automationreinvented.blogspot.com: Top 11 Kubernetes interview question and answers for SDET Devops QA SET-01?
• devsecops.co.in: Kubernetes Interview Questions and Answers
• ymmt2005.hatenablog.com: 47 things that you should know to be a Kubernetes experts (questions + answers)
• automationreinvented.blogspot.com: kubernetes posts

Certified Kubernetes Application Developer (CKAD)

• cncf.io: Certified Kubernetes Application Developer (CKAD)
• CKAD-Bookmarks save time in searching docs in CKAD exam

Books and eBooks

• developers.redhat.com: Kubernetes Operators
• Kubernetes 101
• learnk8s.io/first-steps
• ubuntuask.com: Best New Kubernetes Books

Kubernetes Patterns eBooks

• k8spatterns.io: Free Kubernetes Patterns e-book , ref
• magalix.com: Free Kubernetes Application Architecture Patterns eBook

Famous Kubernetes ebooks of 2019

• Kubernetes essentials E-book
• Cloud-Native DevOps With Kubernetes O'Reilly book (Free)
• Kubernetes: Up and Running, 2nd Edition Dive into the Future of Infrastructure. By Brendan Burns, Kelsey Hightower, Joe Beda
• Container Security
  • Don't make this container security mistake
• digitalocean.com: From Containers to Kubernetes with Node.js eBook

[](http://shop.oreilly.com/product/0636920223788.do)

Famous Kubernetes resources of 2019

• Kubernetes for developers
• Kubernetes for the Absolute Beginners
• Kubernetes: Getting Started (Free)
• Kubernetes Tutorial: Learn the Basics
• Complete Kubernetes Course
• Getting started with Kubernetes

Famous Kubernetes resources of 2020

• javarevisited.blogspot.com: Top 5 courses to Learn Docker and Kubernetes in 2020 - Best of Lot
• medium.com: Top 15 Online Courses to Learn Docker, Kubernetes, and AWS for Fullstack Developers and DevOps Engineers
• medium.com: 7 Free Online Courses to Learn Kubernetes in 2020
• skillslane.com: 10 Best Kubernetes Courses [2020]: Beginner to Advanced Courses

Kubernetes Slack Channel

• kubernetes.slack.com
• slack.kubernetes.io is the way to get yourself invited.

Bunch of images

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Videos

Click to expand!

Tweets

Click to expand!

Can you change an application without changing any code in Kubernetes?

You can when you use multiple containers in a single Pod.

Here’s a visual recap of @EmanuelMEvans ’s article on extending apps on Kubernetes with multi-container pods https://t.co/afS3pPj4zb pic.twitter.com/LS5zOZErbE

— Daniele Polencic (@danielepolencic) March 1, 2021

<script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

What if you could choose the best node for your Kubernetes cluster before writing any code?

I built a calculator to choose the optimal instance sizing for your Kubernetes clusterhttps://t.co/3jlyCLrvdq

Discover:

- costs (used, wasted, kubelet)
- overcommitment
- utilisation pic.twitter.com/gdRTEWkez6

— Daniele Polencic (@danielepolencic) September 7, 2021

<script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

THREAD: What happens when you create a Pod in Kubernetes?

Spoiler: a surprisingly simple task reveals a complicated workflow that touches several components in the cluster. pic.twitter.com/SNEufo0lBe

— Daniele Polencic (@danielepolencic) August 6, 2020

<script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

THREAD: How to quarantine a Pod in Kubernetes.

This technique helps you with debugging running Pods in production.

The Pod is detached from the Service (no traffic), and you can troubleshoot it live.

Let's get started! pic.twitter.com/E7AUh2ylM7

— Daniele Polencic (@danielepolencic) June 24, 2020

<script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

THREAD: How to gracefully shut down Pods without dropping production traffic in Kubernetes

If you've ever noticed dropped connection after a rolling upgrade, this thread digs into the details.

Let's start: 𝘸𝘩𝘢𝘵 𝘩𝘢𝘱𝘱𝘦𝘯𝘴 𝘸𝘩𝘦𝘯 𝘢 𝘗𝘰𝘥 𝘪𝘴 𝘥𝘦𝘭𝘦𝘵𝘦𝘥? pic.twitter.com/jS5litVUlw

— Daniele Polencic (@danielepolencic) July 6, 2020

<script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

THREAD: How does the scheduler work in Kubernetes?

The scheduler is in charge of deciding where your pods are deployed in the cluster.

It might sound like an easy job, but it's rather complicated!

Let's dive into it. pic.twitter.com/iC1vnargc4

— Daniele Polencic (@danielepolencic) September 24, 2020

<script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

MEGATHREAD

Learn Kubernetes one Twitter thread at the time!

Below you can find a collection of threads about Kubernetes and Kubernetes-related tech!

I regularly add more, so you can follow me or @learnk8s for more updates! pic.twitter.com/0ingxHn9vx

— Daniele Polencic (@danielepolencic) August 26, 2020

<script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

THREAD

Running new apps in Kubernetes is straightforward.

But what happens when you have legacy apps that:

- Log to file instead of stdout?
- Has no support Prometheus?
- Has no support for HTTPS

Read on → pic.twitter.com/m79f69Huqw

— Daniele Polencic (@danielepolencic) February 22, 2021

<script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

I'm often asked why I prefer zonal Kubernetes clusters over regional clusters. @gctaylor does a great job explaining how @reddit leverages zonal clusters to limit the blast radius of config changes and reduce cross AZ network traffic. https://t.co/3pW5awTtdQ

— Kelsey Hightower (@kelseyhightower) March 18, 2021

<script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

THREAD

How do you scale background jobs in Kubernetes?

With Python, Celery, RabbitMQ and KEDA! pic.twitter.com/BOtwiSjIKW

— Daniele Polencic (@danielepolencic) March 29, 2021

<script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

Architecting #Kubernetes clusters: Should you use a single cluster or many clusters for your team(s)?

There are pros and cons to both, read the thread to find out more 🧵 pic.twitter.com/1n5ACO97Ay

— appvia (@appvia_io) August 17, 2021

<script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

Unpopular opinion: Kubernetes doesn't have a clear separation between admin and app developer APIs, and we acknowledged this as a source of complexity but maybe this is why it became successful.

— Jaana Dogan ヤナ ドガン (@rakyll) September 9, 2021

<script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

Kubernetes saved us from a world of completely proprietary Cloud APIs and provided a trustworthy basis for an open ecosystem of infrastructure tools and APIs. https://t.co/i67orzir2O

— Ian Lewis 💉💉 (@IanMLewis) September 11, 2021

<script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>

As more enterprises embrace #containers, they’ll find they need #Kubernetes, too. With our open approach, #K8s does more. Here’s how: https://t.co/y9TciK53F1 pic.twitter.com/CPWHcy5TOZ

— Nicholas Gerasimatos - Red Hat (@nicholas_redhat) September 23, 2021

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