How to Write a Kubernetes Operator Using client-go

1. client-go

   1 41 9,587 9.5 Go

   Go client for Kubernetes.

   

   client-go is the official Golang client for Kubernetes, responsible for interacting with the Kubernetes API server using REST API. In fact, client-go can do almost anything, not just for writing operators. Even the internal implementation of kubectl is based on client-go. As for more specialized frameworks used to write operators, including controller-runtime, kubebuilder, and operator-sdk, they will be introduced later in this series.

2. Sevalla

   sevalla.com featured

   Deploy and host your apps and databases, now with $50 credit! Sevalla is the PaaS you have been looking for! Advanced deployment pipelines, usage-based pricing, preview apps, templates, human support by developers, and much more!

   

3. controller-runtime

   2 59 2,784 9.2 Go

   Repo for the controller-runtime subproject of kubebuilder (sig-apimachinery)

   

   client-go is the official Golang client for Kubernetes, responsible for interacting with the Kubernetes API server using REST API. In fact, client-go can do almost anything, not just for writing operators. Even the internal implementation of kubectl is based on client-go. As for more specialized frameworks used to write operators, including controller-runtime, kubebuilder, and operator-sdk, they will be introduced later in this series.

4. kubebuilder

   3 52 8,668 9.7 Go

   Kubebuilder - SDK for building Kubernetes APIs using CRDs

   

   client-go is the official Golang client for Kubernetes, responsible for interacting with the Kubernetes API server using REST API. In fact, client-go can do almost anything, not just for writing operators. Even the internal implementation of kubectl is based on client-go. As for more specialized frameworks used to write operators, including controller-runtime, kubebuilder, and operator-sdk, they will be introduced later in this series.

5. operator-sdk

   4 26 7,487 8.6 Go

   SDK for building Kubernetes applications. Provides high level APIs, useful abstractions, and project scaffolding.

   

   client-go is the official Golang client for Kubernetes, responsible for interacting with the Kubernetes API server using REST API. In fact, client-go can do almost anything, not just for writing operators. Even the internal implementation of kubectl is based on client-go. As for more specialized frameworks used to write operators, including controller-runtime, kubebuilder, and operator-sdk, they will be introduced later in this series.

6. sample-controller

   5 8 3,386 8.9 Go

   Repository for sample controller. Complements sample-apiserver

   

   sample-controller is an official Kubernetes example operator implemented using client-go.

7. code-generator

   6 3 1,818 9.5 Go

   Generators for kube-like API types

   

   The Sample Controller uses Kubernetes' code-generator to generate typed clients, informers, listers, and deep-copy functions for the CRD. So whenever you modify types.go, you need to run ./hack/update-codegen.sh to regenerate the code.

Suggest a related project