awesome-kubernetes/docs/kubernetes.md

<!-- TOC -->

- [Kubernetes](#kubernetes)
    - [Operators](#operators)
    - [GKE vs EKS vs AKS](#gke-vs-eks-vs-aks)
    - [Kubenetes Tutorials](#kubernetes-tutorials)
    - [Kubernetes Cheat Sheets](#kubernetes-cheat-sheets)
    - [Kubernetes Patterns](#kubernetes-patterns)
    - [Kubernetes Networking](#kubernetes-networking)
    - [Local Installers](#local-installers)
    - [Production Cluster Installers](#production-cluster-installers)
    - [Rancher](#rancher) Rancher is enterprise management for Kubernetes
    - [Helm and Kubernetes](#helm-and-kubernetes)
    - [Other tools](#other-tools)
    - [Demos](#demos)
    - [Spring PetClinic Sample Application](#spring-petclinic-sample-application)
    - [SpringBoot with Docker](#springboot-with-docker)
    - [Troubleshooting](#troubleshooting)
    - [Security](#security)
    - [AWS EKS](#aws-eks)
    - [Docker in Docker](#docker-in-docker)
    - [Serverless](#serverless)
    - [Container Ecosystem](#Container-ecosystem)
    - [Container Flowchart](#Container-flowchart)
    - [Videos](#videos)

<!-- /TOC -->

# Kubernetes
* [Wikipedia.org: Kubernetes](https://en.wikipedia.org/wiki/Kubernetes)
* [youtube: Kubernetes in 5 mins](https://www.youtube.com/watch?v=PH-2FfFD2PU)
* [docs.kubernetes.io](http://docs.kubernetes.io/)
* [unofficial-kubernetes.readthedocs.io](https://unofficial-kubernetes.readthedocs.io/)
* [Awesome kubernetes 🌟🌟🌟🌟](https://github.com/ramitsurana/awesome-kubernetes)
* [https://www.reddit.com/r/kubernetes 🌟🌟🌟](https://www.reddit.com/r/kubernetes) 
* [stackify.com: The Advantages of Using Kubernetes and Docker Together 🌟🌟🌟](https://stackify.com/kubernetes-docker-deployments/)
* [Ansible for devops: Kubernetes](https://github.com/geerlingguy/ansible-for-devops/tree/master/kubernetes)
* [kubedex.com 🌟🌟🌟](https://kubedex.com/) Discover, Compare and Share Kubernetes Applications
    * [kubedex.com: autoscaling 🌟](https://kubedex.com/autoscaling)
* [medium.com: The Kubernetes Scheduler: this series aims to advance the understanding of Kubernetes and its underlying concepts](https://medium.com/@dominik.tornow/the-kubernetes-scheduler-cd429abac02f)
* [medium.com: A Year Of Running Kubernetes at MYOB, And The Importance Of Empathy](https://medium.com/@jpcontad/a-year-of-running-kubernetes-as-a-product-7eed1204eecd)
* [blogs.mulesoft.com - K8s: 8 questions about Kubernetes](https://blogs.mulesoft.com/dev/resources-dev/k8s-kubernetes/)
* [labs.mwrinfosecurity.com: Attacking Kubernetes through Kubelet](https://labs.mwrinfosecurity.com/blog/attacking-kubernetes-through-kubelet/)
* [blog.doit-intl.com: Kubernetes and Secrets Management in the Cloud](https://blog.doit-intl.com/kubernetes-and-secrets-management-in-cloud-858533c20dca)
* [medium.com: Kubernetes Canary Deployment #1 Gitlab CI](https://medium.com/@wuestkamp/kubernetes-canary-deployment-1-gitlab-ci-518f9fdaa7ed)
* [kubernetes-on-aws.readthedocs.io](https://kubernetes-on-aws.readthedocs.io/ )
* [techbeacon.com: Why teams fail with Kubernetes—and what to do about it 🌟🌟🌟](https://techbeacon.com/enterprise-it/why-teams-fail-kubernetes-what-do-about-it)
* [itnext.io: Kubernetes rolling updates, rollbacks and multi-environments 🌟🌟🌟](https://itnext.io/kubernetes-rolling-updates-rollbacks-and-multi-environments-4ff9912df5)
* [learnk8s.io: Architecting Kubernetes clusters — choosing a worker node size 🌟🌟🌟](https://learnk8s.io/kubernetes-node-size)
* [medium.com: Kubernetes NodePort vs LoadBalancer vs Ingress? When should I use what? 🌟🌟🌟](https://medium.com/google-cloud/kubernetes-nodeport-vs-loadbalancer-vs-ingress-when-should-i-use-what-922f010849e0)
* [sysdig.com: Understanding Kubernetes limits and requests by example 🌟🌟🌟](https://sysdig.com/blog/kubernetes-limits-requests/)
* [youtube: Kubernetes 101: Get Better Uptime with K8s Health Checks](https://www.youtube.com/watch?v=D9w3DH1zAc8)
* [learnk8s.io: Load balancing and scaling long-lived connections in Kubernetes 🌟🌟🌟🌟🌟](https://learnk8s.io/kubernetes-long-lived-connections)
* [itnext.io: Successful & Short Kubernetes Stories For DevOps Architects](https://itnext.io/successful-short-kubernetes-stories-for-devops-architects-677f8bfed803)
* kind of a handy way to see all thing things you can affect with Kubernetes RBAC. This will list all resources and sub resources that you can constrain with RBAC. If you want to see just subresources append "| grep {name}/":

    ```
    kubectl get --raw /openapi/v2  | jq '.paths | keys[]'
    ```

* [blog.alexellis.io: Get a LoadBalancer for your private Kubernetes cluster](https://blog.alexellis.io/ingress-for-your-local-kubernetes-cluster/)
* [itnext.io: K8s Vertical Pod Autoscaling 🌟](https://itnext.io/k8s-vertical-pod-autoscaling-fd9e602cbf81)
* [share a configMap in kubernetes between namespaces:](https://stackoverflow.com/questions/55515594/is-there-a-way-to-share-a-configmap-in-kubernetes-between-namespaces)
    ```
    kubectl get configmap --namespace=<source> <configmap> --export -o yaml | sed "s/<source>/<dest>/" | kubectl apply --namespace=<dest> -f -
    ```
    
* [medium.com: kubernetes Pod Priority and Preemption](https://medium.com/@mohaamer5/kubernetes-pod-priority-and-preemption-943c58aee07d)
* [returngis.net: Pruebas de vida de nuestros contenedores en Kubernetes](https://www.returngis.net/2020/02/pruebas-de-vida-de-nuestros-contenedores-en-kubernetes/)
* [itnext.io: K8s prevent queue worker Pod from being killed during deployment](https://itnext.io/k8s-prevent-queue-worker-pod-from-being-killed-during-deployment-4252ea7c13f6) How to prevent a Kubernetes (like RabbitMQ) queue worker Pod from being killed during deployment while handling a message?
* [youtube: deployment strategies in kubernetes | recreate | rolling update | blue/green | canary](https://youtu.be/efiMiaFjtn8)
* [sysdig.com: Understanding Kubernetes limits and requests by example 🌟🌟🌟](https://sysdig.com/blog/kubernetes-limits-requests/)
* [kodekloud.com: Kubernetes Features Every Beginner Must Know](https://kodekloud.com/blog/200628/kubernetes-features-every-beginner-must-know)
* [platform9.com: Kubernetes CI/CD Pipelines at Scale](https://platform9.com/blog/kubernetes-ci-cd-pipelines-at-scale/)
* **FaaS arquitecture:**
    * [magalix.com: Implementing FaaS in Kubernetes Using Kubeless](https://www.magalix.com/blog/implementing-faas-in-kubernetes-using-kubeless)
* [learnk8s.io: Architecting Kubernetes clusters — how many should you have? 🌟](https://learnk8s.io/how-many-clusters)
* [magalix.com: Capacity Planning 🌟🌟🌟](https://www.magalix.com/blog/kubernetes-patterns-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? 

## Operators
* [kruschecompany.com: What is a Kubernetes Operator and Where it Can be Used?](https://kruschecompany.com/kubernetes-operator/)
* [kruschecompany.com: Prometheus Operator – Installing Prometheus Monitoring Within The Kubernetes Environment](https://kruschecompany.com/kubernetes-prometheus-operator/)
* [redhat.com: Kubernetes operators - Embedding operational expertise side by side with containerized applications](https://www.redhat.com/sysadmin/kubernetes-operators)

## GKE vs EKS vs AKS
* [medium.com: Kubernetes Cloud Services: Comparing GKE, EKS and AKS](https://medium.com/@Platform9Sys/kubernetes-cloud-services-comparing-gke-eks-and-aks-1fe42770cad3)

## Kubernetes Tutorials
* [katacoda.com 🌟🌟🌟🌟](https://www.katacoda.com/) Interactive Learning and Training Platform for Software Engineers 
* [kubernetesbyexample.com 🌟🌟🌟](http://kubernetesbyexample.com/)
* [Play with Kubernetes 🌟🌟🌟🌟](https://labs.play-with-k8s.com/) A simple, interactive and fun playground to learn Kubernetes
* [devopscube.com: Kubernetes Tutorials For Beginners: Getting Started Guide 🌟🌟🌟](https://devopscube.com/kubernetes-tutorials-beginners/)
* [Intoduction to Kubernetes (slides, beginners and advanced) 🌟🌟🌟🌟🌟](https://docs.google.com/presentation/d/1zrfVlE5r61ZNQrmXKx5gJmBcXnoa_WerHEnTxu5SMco/edit#slide=id.g3cfa019267_4_0)
* [medium.com: Kubernetes 101: Pods, Nodes, Containers, and Clusters](https://medium.com/google-cloud/kubernetes-101-pods-nodes-containers-and-clusters-c1509e409e16)
* [medium.com: Learn Kubernetes in Under 3 Hours: A Detailed Guide to Orchestrating Containers](https://medium.com/free-code-camp/learn-kubernetes-in-under-3-hours-a-detailed-guide-to-orchestrating-containers-114ff420e882)
* [kubernetestutorials.com: Install and Deploy Kubernetes on CentOs 7](https://kubernetestutorials.com/install-and-deploy-kubernetes-on-centos-7/)
* [medium.com: Simplifying orchestration with Kubernetes](https://medium.com/@swapnasagarpradhan/simplifying-orchestration-with-kubernetes-e81015681a85)
* [aquasec.com: 70 Best Kubernetes Tutorials 🌟🌟🌟🌟](https://www.aquasec.com/wiki/display/containers/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 🌟🌟🌟](https://cloud.google.com/kubernetes-engine/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](https://www.magalix.com/blog/kubernetes-101-concepts-and-why-it-matters)
* [Google Play: Learning Solution - Learn Kubernetes 🌟🌟🌟](https://play.google.com/store/apps/details?id=com.LearningSolution.LearnKubernetes)
* [Google Play: TomApp - Learn Kubernetes](https://play.google.com/store/apps/details?id=tomtran.learnkubernetes)
    * [apkplz.net: Learn Kubernetes 1 APK](https://apkplz.net/app/com.LearningSolution.LearnKubernetes)
    * [Google Play Search](https://play.google.com/store/search?q=learn+kubernetes)
* [Dzone refcard: Getting Started with Kubernetes](https://dzone.com/refcardz/kubernetes-essentials)
* [udemy.com: Learn DevOps: The Complete Kubernetes Course 🌟🌟🌟🌟](https://www.udemy.com/learn-devops-the-complete-kubernetes-course)
* [udemy.com: Learn DevOps: Advanced Kubernetes Usage 🌟🌟🌟🌟](https://www.udemy.com/learn-devops-advanced-kubernetes-usage)
* **Famous Kubernetes resources of 2019:**
    * [Kubernetes for developers](https://lnkd.in/eTNwZ69)
    * [Kubernetes for the Absolute Beginners](https://lnkd.in/ecCR3vT)
    * [Kubernetes: Getting Started (Free)](https://lnkd.in/eF3ZxZ5)
    * [Kubernetes Tutorial: Learn the Basics](https://lnkd.in/e7BE7qE)
    * [Kubernetes essentials E-book 🌟🌟🌟](https://lnkd.in/ezCTYyi)
    * [Cloud-Native DevOps With Kubernetes O'Reilly book (Free) 🌟🌟🌟](https://lnkd.in/e7f2HVv)
    * [Complete Kubernetes Course](https://lnkd.in/eVG5Za9)
    * [Getting started with Kubernetes](https://lnkd.in/emPjNM9)
* [wardviaene/kubernetes-course 🌟🌟🌟🌟](https://github.com/wardviaene/kubernetes-course) 
* [wardviaene/advanced-kubernetes-course 🌟🌟🌟🌟](https://github.com/wardviaene/advanced-kubernetes-course) 
* [dzone: The complete kubernetes collection tutorials and tools 🌟🌟🌟🌟](https://dzone.com/articles/the-complete-kubernetes-collection-tutorials-and-tools)
* [dzone: kubernetes in 10 minutes a complete guide to look](https://dzone.com/articles/kubernetes-in-10-minutes-a-complete-guide-to-look)
* [**magalix.com: The Best Kubernetes Tutorials** 🌟🌟🌟](https://www.magalix.com/blog/the-best-kubernetes-tutorials)
* [35 Advanced Tutorials to Learn Kubernetes 🌟🌟🌟](https://medium.com/faun/35-advanced-tutorials-to-learn-kubernetes-dae5695b1f18)
* [javarevisited.blogspot.com: Top 5 courses to Learn Docker and Kubernetes in 2020 - Best of Lot](https://javarevisited.blogspot.com/2019/05/top-5-courses-to-learn-docker-and-kubernetes-for-devops.html)

## Kubernetes Cheat Sheets
* [developers.redhat.com: Kubernetes Cheat Sheet 🌟](https://developers.redhat.com/cheat-sheets/kubernetes/)
* [kubernetes.io 🌟🌟](https://kubernetes.io/docs/reference/kubectl/cheatsheet/)
* [linuxacademy](https://linuxacademy.com/blog/containers/kubernetes-cheat-sheet/)
* [fabric8 - kubectl](https://github.com/fabric8io/kansible/blob/master/vendor/k8s.io/kubernetes/docs/user-guide/kubectl-cheatsheet.md)
* [intellipaat.com 🌟🌟](https://intellipaat.com/blog/tutorial/devops-tutorial/kubernetes-cheat-sheet/)
* [dzone: kubectl commands cheat sheet](https://dzone.com/articles/kubectl-commands-cheat-sheet)

## Kubernetes Patterns
* [redhat.com: Kubernetes Patterns e-book 🌟🌟🌟🌟](https://www.redhat.com/en/engage/kubernetes-containers-architecture-s-201910240918)
* [github.com/k8spatterns/examples 🌟🌟🌟](https://github.com/k8spatterns/examples) Examples for "Kubernetes Patterns - Reusable Elements for Designing Cloud-Native Applications"
* [kubernetes.io: container design patterns](https://kubernetes.io/blog/2016/06/container-design-patterns/)
* [magalix.com: Kubernetes Patterns - The Service Discovery Pattern 🌟🌟🌟](https://www.magalix.com/blog/kubernetes-patterns-the-service-discovery-pattern)
* [gardener.cloud: Kubernetes Antipatterns](https://gardener.cloud/050-tutorials/content/howto/antipattern/)
* [dzone.com: Performance Patterns in Microservices-Based Integrations 🌟🌟🌟🌟🌟](https://dzone.com/articles/performance-patterns-in-microservices-based-integr-1)

## Kubernetes Networking
* [dzone: how to setup kubernetes networking](https://dzone.com/articles/how-to-understand-and-setup-kubernetes-networking)
* [AWS and Kubernetes Networking Options and Trade-Offs (part 1)](https://www.weave.works/blog/introduction-to-kubernetes-pod-networking--part-1)
* [AWS and Kubernetes Networking Options and Trade-Offs (part 2)](https://www.weave.works/blog/aws-networking-overview---part-2)
* [AWS and Kubernetes Networking Options and Trade-Offs (part 3)](https://dzone.com/articles/aws-and-kubernetes-networking-options-and-trade-of) 
* [ovh.com - getting external traffic into kubernetes: clusterip, nodeport, loadbalancer and ingress](https://www.ovh.com/blog/getting-external-traffic-into-kubernetes-clusterip-nodeport-loadbalancer-and-ingress/)
* [youtube: Kubernetes Ingress Explained Completely For Beginners](https://www.youtube.com/watch?v=VicH6KojwCI)
* [stackrox.com: Kubernetes Networking Demystified: A Brief Guide](https://www.stackrox.com/post/2020/01/kubernetes-networking-demystified/)
* [medium.com: Fighting Service Latency in Microservices With Kubernetes](https://medium.com/@sindhujacynixit/fighting-service-latency-in-microservices-with-kubernetes-f5a584f5af36)

## Local Installers
* [Minikube](https://github.com/kubernetes/minikube) A tool that makes it easy to run Kubernetes locally inside a Linux VM. It's aimed on users who want to just test it out or use it for development. It cannot spin up a production cluster, it's a one node machine with no high availability.
    * [murchie85.github.io: Installling minikube](https://murchie85.github.io/Kubernetes.html)
* [store.docker.com: Docker Community Edition EDGE with kubernetes. Installing Kubernetes using the Docker Client](https://store.docker.com/editions/community/docker-ce-desktop-windows) Currently only available in **Edge** edition.
* [medium.com: Local Kubernetes for Linux — MiniKube vs MicroK8s](https://medium.com/containers-101/local-kubernetes-for-linux-minikube-vs-microk8s-1b2acad068d3)
* [itnext.io: Run Kubernetes On Your Machine](https://itnext.io/run-kubernetes-on-your-machine-7ee463af21a2) Several options to start playing with K8s in no time

## Production Cluster Installers

* [Kubernetes Cluster with **Kops**:](https://github.com/kubernetes/kops) 
    * Minikube and docker client are great for local setups, but not for real clusters. Kops and kubeadm are tools to spin up a production cluster. You don't need both tools, just one of them. 
    * On AWS, the best tool is **kops**
    * At some point AWS EKS (hosted kubernetes) will be available, at that point this will probably be the preferred option. (You won't need to maintain the masters).
    * For other installs, or if you can't get kops to work, you can use kubeadm
    * **kubeadm** is an alternative approach, kops is still recommended (on AWS) - you also have AWS integrations with kops automatically
    * Setup **kops** in your windows with **virtualbox.org** and **vagrantup.com** . Once downloaded, to type a new linux VM, just type in cmd/powershell:

    1. Spin up ubuntu via vagrant:
    
    ```
    C:\ubuntu> vagrant init ubuntu/xenial64
    C:\ubuntu> vagrant up
    [...]
    C:\ubuntu> vagrant ssh-config
    C:\ubuntu> vagrant ssh
    ```
    
    2. Runt kops installer:
    
    ```
    curl -LO https://github.com/kubernetes/kops/releases/download/$(curl -s https://api.github.com/repos/kubernetes/kops/releases/latest | grep tag_name | cut -d '"' -f 4)/kops-linux-amd64
    chmod +x kops-linux-amd64
    sudo mv kops-linux-amd64 /usr/local/bin/kops
    ```

* [Kubernetes Cluster with **Kubeadm**](https://github.com/kubernetes/kubeadm) It works on any deb / rpm compatible Linux OS, for example Ubuntu, Debian, RedHat or CentOS. This is the main advantage of kubeadm. The tool itself is still in beta (Q1 2018), but is expected to become stable somewhere this year. It's very easy to use and lets you spin kubernetes cluster in just a couple of minutes.
* [Ansible Role - Kubernetes (Jeff Geerling)](https://github.com/geerlingguy/ansible-role-kubernetes)
* [**Kubespray**](https://github.com/kubernetes-sigs/kubespray)
* [**Conjure up**](https://conjure-up.io/)
* [A Comparative Analysis of Kubernetes Deployment Tools: Kubespray, kops, and conjure-up](https://www.altoros.com/research-papers/a-comparative-analysis-of-kubernetes-deployment-tools-kubespray-kops-and-conjure-up-2/)
* [wecloudpro.com: Deploy HA kubernetes cluster in AWS in less than 5 minutes](http://wecloudpro.com/2020/01/13/kube-autp-aws.html)
* [infoq.com: **WKSctl**: a Tool for Kubernetes Cluster Management Using GitOps](https://www.infoq.com/news/2020/02/wksctl-kubernetes-gitops/)
* [**Kelsey Hightower: kubernetes the hard way**](https://github.com/kelseyhightower/kubernetes-the-hard-way)
* [napo.io: Kubernetes The (real) Hard Way on AWS](https://napo.io/posts/kubernetes-the-real-hard-way-on-aws/)
* [napo.io: Terraform Kubernetes Multi-Cloud (ACK, AKS, DOK, EKS, GKE, OKE)](https://napo.io/posts/terraform-kubernetes-multi-cloud-ack-aks-dok-eks-gke-oke/)
* [linecorp.com: Building Large Kubernetes Clusters with **Caravan**](https://engineering.linecorp.com/en/blog/building-large-kubernetes-clusters/)
* [**ClusterAPI**](https://cluster-api.sigs.k8s.io/)
* [**microk8s.io**](https://microk8s.io/)
* [**kind**](https://github.com/kubernetes-sigs/kind)
* [**VMware Kubernetes Tanzu**](https://cloud.vmware.com/tanzu)

## Rancher
* [rancher.com](https://rancher.com/)
* [**Rancher 2**](https://rancher.com/docs/rancher/v2.x/en/)
* [**Rancher 2 RKE**](https://rancher.com/products/rke/) Rancher 2 that runs in docker containers.
    * [Rancher.com: Setup a basic Kubernetes cluster with ease using RKE](https://rancher.com/blog/2018/2018-09-26-setup-basic-kubernetes-cluster-with-ease-using-rke/)
* [**k3s.io**](https://k3s.io/) Basic kubernetes with automated installer.   
* [**k3d**](https://github.com/rancher/k3d) k3s that runs in docker containers.	
* [**k3OS**](https://github.com/rancher/k3os) k3OS is a Linux distribution designed to remove as much OS maintenance as possible in a Kubernetes cluster. It is specifically designed to only have what is needed to run k3s. Additionally the OS is designed to be managed by kubectl once a cluster is bootstrapped. Nodes only need to join a cluster and then all aspects of the OS can be managed from Kubernetes. Both k3OS and k3s upgrades are handled by the k3OS operator.

|[![k3s use cases](images/k3s-use-cases.png)](https://www.youtube.com/watch?v=2LNxGVS81mE)|[![kOS value add](images/k3OS-value-add.png)](https://www.youtube.com/watch?v=2LNxGVS81mE)|
|:---:|:---:|
[![rancher architecture](images/rancher.png)](https://www.youtube.com/watch?v=2LNxGVS81mE)

## Helm and Kubernetes
* [helm.sh](https://helm.sh/)
    * [helm.sh/docs](https://helm.sh/docs) 
* [GitHub: Helm, the Kubernetes Package Manager](https://github.com/helm/helm) Installing and managing Kubernetes applications
* [Helm and Kubernetes Tutorial - Introduction](https://www.youtube.com/watch?v=9cwjtN3gkD4)
* [Delve into Helm: Advanced DevOps](https://www.youtube.com/watch?v=cZ1S2Gp47ng)
* [Continuously delivering apps to Kubernetes using Helm](https://www.youtube.com/watch?v=CmPK93hg5w8)
* [Zero to Kubernetes CI/CD in 5 minutes with Jenkins and Helm](https://www.youtube.com/watch?v=eMOzF_xAm7w)
* [DevOps with Azure, Kubernetes, and Helm](https://www.youtube.com/watch?v=INv-VCZvM_o)
* [dzone: the art of the helm chart patterns](https://dzone.com/articles/the-art-of-the-helm-chart-patterns-from-the-offici)
* [dzone: 15 useful helm chart tools](https://dzone.com/articles/15-useful-helm-charts-tools)
* [dzone: create install upgrade and rollback a helm chart - part 1](https://dzone.com/articles/create-install-upgrade-and-rollback-a-helm-chart-p)
* [dzone: create install upgrade and rollback a helm chart - part 2](https://dzone.com/articles/create-install-upgrade-rollback-a-helm-chart-part)
* [dzone: cicd with kubernetes and helm](https://dzone.com/articles/cicd-with-kubernetes-and-helm)
* [dzone: do you need helm?](https://dzone.com/articles/do-you-need-helm)
* [dzone: managing helm releases the gitops way](https://dzone.com/articles/managing-helm-releases-the-gitops-way)
* [codefresh.io: Using Helm 3 with Helm 2 charts](https://codefresh.io/helm-tutorial/taking-helm-3-spin/)
* Helm Charts:
    * [Jenkins](https://github.com/helm/charts/tree/master/stable/jenkins) 
    * [Codecentric Jenkins 🌟](https://github.com/codecentric/helm-charts/tree/master/charts/jenkins) Helm 3 compliant (Simpler and more secure than helm 2)
    * [Nexus3](https://github.com/helm/charts/tree/master/stable/sonatype-nexus)
    * [Choerodon Nexus3 🌟](https://hub.helm.sh/charts/choerodon/nexus3) Helm 3 compliant (Simpler and more secure than helm 2)
    * [Sonar](https://github.com/helm/charts/tree/master/stable/sonarqube)
    * [Selenium](https://github.com/helm/charts/tree/master/stable/selenium)
    * [Jmeter](https://github.com/helm/charts/tree/master/stable/distributed-jmeter)
    * [bitnami: create your first helm chart](https://docs.bitnami.com/kubernetes/how-to/create-your-first-helm-chart/)
* Helm Charts repositories:
    * [hub.helm.sh 🌟🌟🌟](http://hub.helm.sh) 
    * [Bitnami Helm Charts](https://bitnami.com/stacks/helm)

## Other tools
* [VMware octant](https://github.com/vmware/octant) A web-based, highly extensible platform for developers to better understand the complexity of Kubernetes clusters.
    * [octant.dev](https://octant.dev/) Visualize your Kubernetes workloads. Octant is an open source developer-centric web interface for Kubernetes that lets you inspect a Kubernetes cluster and its applications.
* [KSS - Kubernetes pod status on steroid](https://github.com/chmouel/kss)
* [kubectl-debug](https://github.com/aylei/kubectl-debug)
* [kubectl-tree](https://github.com/ahmetb/kubectl-tree) kubectl plugin to browse Kubernetes object hierarchies as a tree
* [The Golden Kubernetes Tooling and Helpers list](https://docs.google.com/spreadsheets/d/1WPHt0gsb7adVzY3eviMK2W8LejV0I5m_Zpc8tMzl_2w)
* [kubech (kubectl change)](https://github.com/aabouzaid/kubech) Set kubectl contexts/namespaces per shell/terminal to manage multi Kubernetes cluster at the same time.
* [Kubecle](https://github.com/rydogs/kubecle) is a web ui running locally that provides useful information about your kubernetes clusters. It is an alternative to Kubernetes Dashboard. Because it runs locally, you can access any kubernetes clusters you have access to
* [Permission Manager](https://github.com/sighupio/permission-manager) is a project that brings sanity to Kubernetes RBAC and Users management, Web UI FTW
* [developer.sh: Kubernetes client tools overview](https://developer.sh/posts/kubernetes-client-tools-overview)
* [kubectx](https://github.com/ahmetb/kubectx) Faster way to switch between clusters and namespaces in kubectl 
* [go-kubectx](https://github.com/aca/go-kubectx) 5x-10x faster alternative to kubectx. Uses client-go.
* [kubevious](https://github.com/kubevious/kubevious) is open-source software that provides a usable and highly graphical interface for Kubernetes. Kubevious renders all configurations relevant to the application in one place.
* [Guard](https://github.com/appscode/guard) is a Kubernetes Webhook Authentication server. Using guard, you can log into your Kubernetes cluster using various auth providers. Guard also configures groups of authenticated user appropriately.

## Demos
* [kubernetesbyexample.com 🌟🌟🌟](http://kubernetesbyexample.com/)
* [github.com/eon01/kubernetes-workshop](https://github.com/eon01/kubernetes-workshop)
* [github.com/wardviaene (kubernetes, terraform, ansible, docker, etc) 🌟🌟🌟](https://github.com/wardviaene)
    * [wardviaene/jenkins-course](https://github.com/wardviaene/jenkins-course)
    * [wardviaene/kubernetes-course](https://github.com/wardviaene/kubernetes-course)
* [github.com/kubernetes-course/container_workshops](https://github.com/kubernetes-course/container_workshops)
* [Mautic](https://github.com/mautic/docker-mautic)
* [bitbucket.org: setting up a cicd pipeline with spring mvc and kubernetes on aws](https://bitbucket.org/blog/setting-up-a-ci-cd-pipeline-with-spring-mvc-jenkins-and-kubernetes-on-aws )
* [codeburst.io: getting started with kubernetes, deploy a docker container in 5 minutes](https://codeburst.io/getting-started-with-kubernetes-deploy-a-docker-container-with-kubernetes-in-5-minutes-eb4be0e96370)
* Medium.com - Simple Spring Boot microservice deployed in Kubernetes using Docker and Nexus 🌟🌟🌟:
    * [Part 1](https://medium.com/@simionrazvan/simple-spring-boot-microservice-deployed-in-kubernetes-using-docker-and-nexus-part-1-b581e3ca8916)
    * [Part 2](https://medium.com/@simionrazvan/simple-spring-boot-microservice-deployed-in-kubernetes-using-docker-and-nexus-part-2-25dc2a3982cf)
* [kublr.com: cicd pipeline with jenkins nexus kubernetes](https://kublr.com/blog/cicd-pipeline-with-jenkins-nexus-kubernetes/)

## Spring PetClinic Sample Application
* [spring-petclinic.github.io](https://spring-petclinic.github.io)
    * [spring-petclinic.github.io Docs](https://spring-petclinic.github.io/docs/resources.html)
* [github.com/spring-projects/spring-petclinic](https://github.com/spring-projects/spring-petclinic)
    * [gitlab.beuth-hochschule.de](https://gitlab.beuth-hochschule.de/s70178/petclinic-ansible-jenkins-ci-cd)
    * [gitlab.comquent.de: Microservices branch](https://gitlab.comquent.de/petclinic/spring-petclinic-microservices)
* [deors/deors-demos-petclinic jenkinsfile](https://github.com/deors/deors-demos-petclinic/blob/master/Jenkinsfile)
* [liatrio.com: building with docker using jenkins pipelines](https://www.liatrio.com/blog/building-with-docker-using-jenkins-pipelines)
* [stackoverflow: How to define BuildConfig object with Jenkins and openshift
](https://stackoverflow.com/questions/52337851/how-to-define-buildconfig-object-with-jenkins-and-openshift)
* [cloudogu.com: CD with Jenkins, Nexus and cloudogu](https://cloudogu.com/en/blog/cd-with-nexus-jenkins-ces)
* [experfy.com e-learning: Effective Jenkins - Continuous Delivery and Continuous Integration](https://www.experfy.com/training/courses/effective-jenkins-continuous-delivery-and-continuous-integration)
* Modular Pipeline Library: 4. Petclinic Pipeline 🌟🌟🌟🌟 
    * [griddynamics/mpl](https://github.com/griddynamics/mpl)
    * [blog.griddynamics.com: Developing a modular pipeline library to improve DevOps collaboration](https://blog.griddynamics.com/developing-a-modular-pipeline-library-to-improve-devops-collaboration/)
    * [youtube: Modular Pipeline Library: 4. Petclinic Pipeline](https://www.youtube.com/watch?v=GLtvxY1S3Aw)
* PetClinic on Kubernetes:
    * [github.com/spring-petclinic/spring-petclinic-kubernetes 🌟🌟](https://github.com/spring-petclinic/spring-petclinic-kubernetes)
    * [github.com/paulczar/k8s-spring-petclinic](https://github.com/paulczar/k8s-spring-petclinic)
    * [tech.paulcz.net/blog/spring-into-kubernetes-part-1](https://tech.paulcz.net/blog/spring-into-kubernetes-part-1/)
    * [github.com/kohsuke/petclinic Jenkinsfile](https://github.com/kohsuke/petclinic/blob/master/Jenkinsfile)
    * [pushbuildtestdeploy.com/jenkins-on-kubernetes-building-docker-images 🌟](https://pushbuildtestdeploy.com/jenkins-on-kubernetes-building-docker-images/)
* PetClinic Docker images:
    * [ref 1](https://hub.docker.com/r/ibuchh/petclinic-spinnaker-jenkins)
    * [ref 2](https://hub.docker.com/r/sarjunkumar24391/petclinic)
    * [ref 3](https://hub.docker.com/r/bmoussaud/petclinic)
    * [ref 4](https://hub.docker.com/r/alwin2/petclinic-customers-service)
    * [ref 5 arey/springboot-petclinic](https://hub.docker.com/r/arey/springboot-petclinic/)
    * [ref 6](https://hub.docker.com/r/anthonydahanne/spring-petclinic)
    * [ref 7](https://hub.docker.com/r/jbrisbin/spring-petclinic/)
    * [ref 8](https://github.com/spring-projects/spring-petclinic/issues/339)
    * [ref 9 - I have a branch that adds Docker, Kubernetes and Knative into the mix - planning on submitting a PR at some point](https://github.com/trisberg/spring-petclinic/tree/kubernetes)
* [OpenShift.io Samples 🌟🌟🌟🌟🌟](https://che.openshift.io/dashboard/#/getstarted)
    * [github.com/che-samples](https://github.com/che-samples)

## SpringBoot with Docker
* [spring.io: spring boot with docker](https://spring.io/guides/gs/spring-boot-docker/)
* [spring.io: Creating Docker images with Spring Boot 2.3.0.M1](https://spring.io/blog/2020/01/27/creating-docker-images-with-spring-boot-2-3-0-m1) 
* [learnk8s.io: Developing and deploying Spring Boot microservices on Kubernetes](https://learnk8s.io/spring-boot-kubernetes-guide)

## Troubleshooting
* [Kubernetes troubleshooting diagram 🌟🌟🌟](https://github.com/inafev/awesome-kubernetes/blob/master/docs/images/kubernetes-troubleshooting.jpg)
* [Understanding Kubernetes cluster events 🌟🌟](https://banzaicloud.com/blog/k8s-cluster-logging/)
* [nigelpoulton.com: Troubleshooting kubernetes service discovery - Part 1](https://nigelpoulton.com/blog/f/troubleshooting-kubernetes-service-discovery---part-1)

## Security
* [cilium.io](https://cilium.io/)
* [openpolicyagent.org  🌟🌟🌟](https://www.openpolicyagent.org/)
    * [compile OpenPolicyAgent policies into WebAssembly and run them on the edge](https://github.com/open-policy-agent/contrib/tree/master/wasm/cloudflare-worker)
* [Dzone - devops security at scale](https://dzone.com/articles/devops-security-at-scale)
* [searchitoperations.techtarget.com: kubernetes policy project](https://searchitoperations.techtarget.com/news/252467102/Kubernetes-policy-project-takes-enterprise-IT-by-storm) 
* [Dzone - Kubernetes Policy Management with Kyverno](https://dzone.com/articles/kubernetes-policy-management-with-kyverno)
    * [github Kyverno - Kubernetes Native Policy Management](https://github.com/nirmata/kyverno/)
* [Dzone - OAuth 2.0](https://dzone.com/articles/oauth-20-beginners-guide)
* [Kubernetes Security Best Practices 🌟🌟🌟🌟](https://github.com/freach/kubernetes-security-best-practice/blob/master/README.md#firewall-ports-fire)
* [Pod Security Policy (SCC in OpenShift) 🌟](https://kubernetes.io/docs/concepts/policy/pod-security-policy/)
* EKS Security:
    * [Security Group Rules EKS](https://docs.aws.amazon.com/eks/latest/userguide/sec-group-reqs.html)
    * [EC2 ENI and IP Limit](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-eni.html#AvailableIpPerENI)
    * [Calico in EKS](https://docs.aws.amazon.com/eks/latest/userguide/calico.html )
* [magalix.com: kubernetes authentication 🌟🌟](https://www.magalix.com/blog/kubernetes-authentication)
* [magalix.com: kubernetes authorization 🌟🌟](https://www.magalix.com/blog/kubernetes-authorization)
* [kubernetes login](https://blog.christianposta.com/kubernetes/logging-into-a-kubernetes-cluster-with-kubectl/)
* [Kubernetes Certs](https://github.com/jetstack/cert-manager/)
* [jeffgeerling.com: Everyone might be a cluster-admin in your Kubernetes cluster](https://www.jeffgeerling.com/blog/2020/everyone-might-be-cluster-admin-your-kubernetes-cluster)

## AWS EKS
* [dzone: kops VS EKS](https://dzone.com/articles/kops-vs-eks-a-comparison-guide)
* [udemy.com: amazon eks starter kubernetes on aws](https://www.udemy.com/course/amazon-eks-starter-kubernetes-on-aws/)
* [eksworkshop.com](https://eksworkshop.com/ )
* [eksctl: EKS installer](https://github.com/weaveworks/eksctl)
* Deploy example microservices on EKS:
    * [eksworkshop.com/x-ray/microservices](https://eksworkshop.com/x-ray/microservices/)
    * [aws.amazon.com: Deploy a kubernetes application](https://aws.amazon.com/getting-started/projects/deploy-kubernetes-app-amazon-eks/)
    * [aws blogs: Git Push to Deploy Your App on EKS](https://aws.amazon.com/blogs/opensource/git-push-deploy-app-eks-gitkube/)
    * [medium: create your first application on aws eks kubernetes](https://medium.com/faun/create-your-first-application-on-aws-eks-kubernetes-cluster-874ee9681293)
    * [dzone: deploying a kubernetes cluster with amazon eks 🌟🌟](https://dzone.com/articles/deploying-a-kubernetes-cluster-with-amazon-eks)
* [medium: Implementing Kubernetes Cluster using AWS EKS (AWS Managed Kubernetes)](https://medium.com/@devopsadvocate/how-to-setup-kubernetes-cluster-using-aws-eks-aws-managed-kubernetes-181d5567a8ef)
* [Amazon EKS Security Best Practices](https://www.stackrox.com/post/2019/09/amazon-eks-security-best-practices/)

## Docker in Docker
* [Building Docker images when running Jenkins in Kubernetes](https://www.reddit.com/r/jenkinsci/comments/ctirsc/building_docker_images_when_running_jenkins_in/)
    * [pushbuildtestdeploy.com: jenkins on kubernetes building docker images 🌟🌟](https://pushbuildtestdeploy.com/jenkins-on-kubernetes-building-docker-images/)
    * [ref2](https://github.com/samrocketman/docker-jenkins-jervis/blob/master/README.md#working-with-docker-in-docker)
* [itnext.io: docker in docker](https://itnext.io/docker-in-docker-521958d34efd)
* [code-maze.com: ci jenkins docker](https://code-maze.com/ci-jenkins-docker/)
* [medium: quickstart ci with jenkins and docker in docker](https://medium.com/swlh/quickstart-ci-with-jenkins-and-docker-in-docker-c3f7174ee9ff)
* [getintodevops.com: the simplest way to run docker in docker](https://getintodevops.com/blog/the-simple-way-to-run-docker-in-docker-for-ci#%3A~%3AtargetText=Building+Docker+containers+with+Jenkins+inside+a+container)
* Docker in Docker on EKS:
    * [ref1: docker build --network=host](https://github.com/awslabs/amazon-eks-ami/issues/183)
    * [ref2](https://github.com/weaveworks/eksctl/issues/942)

## Serverless
* [itnext.io: Deploy your first Serverless Function to Kubernetes](https://itnext.io/deploy-your-first-serverless-function-to-kubernetes-232307f7b0a9)

## Container Ecosystem
* [Author: github.com/rootsongjc](https://github.com/rootsongjc)
[![Kubernetes components](images/kubernetes_components_rootsongjc.jpg)](https://github.com/rootsongjc)

## Container Flowchart
[![Container flowchart](images/container_flowchart.jpg)]()

## Videos
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<iframe src="https://www.youtube.com/embed/PH-2FfFD2PU" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>
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<iframe src="https://www.youtube.com/embed/cZ1S2Gp47ng" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
<iframe src="https://www.youtube.com/embed/CmPK93hg5w8" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

</center>