Extending Kubernetes Functionality: A Practical Guide to Custom Resource Definitions

• kubernetes-controller-tutorial

  1 87 5.8

  This repository provides an opinionated tutorial on building Kubernetes controllers, sharing best practices and design patterns I have found most effective

  When covering reconcilers we will cover:

• SaaSHub

  www.saashub.com featured

  SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

  

• kubebuilder

  50 7,962 9.7 Go

  Kubebuilder - SDK for building Kubernetes APIs using CRDs

  

  Kubebuilder, a framework by Kubernetes SIGs, simplifies creating Kubernetes APIs using Custom Resource Definitions.

• k8s-cleaner

  4 320 9.0 Go

  Cleaner is a Kubernetes controller that identifies unused or unhealthy resources, helping you maintain a streamlined and efficient Kubernetes cluster. It provides flexible scheduling, label filtering, Lua-based selection criteria, resource removal or update and notifications via Slack, Webex and Discord. it can also automate clusters operations.

  When I developed k8s-cleaner the goal was to create a tool that could identify unused or unhealthy resources across the cluster. This tool could then either remove or update those resources as needed.

• addon-controller

  20 294 9.5 Go

  Sveltos Kubernetes add-on controller programmatically deploys add-ons and applications in tens of clusters. Support for ClusterAPI powered clusters, Helm charts, kustomize ,YAMLs. Sveltos has built-in support for multi-tenancy.

  

  I also maintain another open-source project called addon-controller. It's a Kubernetes controller that simplifies managing add-ons and applications across multiple clusters. It operates from a central management cluster, managing add-ons and applications on the managed clusters it oversees.

• libsveltos

  1 9 8.9 Go

  Libraries containing all pieces common across different Sveltos repositories

  

  Sveltos supports registering various clusters (GKE, Civo, etc.) with it. Once a cluster is registered, Sveltos can deploy add-ons and applications on it. The SveltosCluster CRD (defined in SveltosCluster) enables cluster registration with Sveltos.

• claudie-sveltos-integration

  2 5 5.1 Go

  This repository aims to streamline the integration between Claudie and Sveltos. It incorporates a controller that monitors Claudie's Secrets for kubeconfig files of Claudie-managed clusters and automatically creates corresponding SveltosCluster resources.

  Also note, not all controllers need to define a new custom resource. For instance https://github.com/gianlucam76/claudie-sveltos-integration is a controller that watches for Kubernetes Secrets created by Claudie and creates a corresponding SveltosCluster resource so that Sveltos can automatically discover clusters created by Claudie.

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