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Controller-runtime Alternatives
Similar projects and alternatives to controller-runtime
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operator-sdk
SDK for building Kubernetes applications. Provides high level APIs, useful abstractions, and project scaffolding.
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reviewdog
🐶 Automated code review tool integrated with any code analysis tools regardless of programming language
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chocolatey-packages
Chocolatey Community Maintainers Team Packages - packages that are managed and maintained by core community team for community package repository (https://community.chocolatey.org/packages)
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a better controller-runtime alternative or higher similarity.
controller-runtime discussion
controller-runtime reviews and mentions
Posts with mentions or reviews of controller-runtime.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2024-10-09.
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Controller-runtime
code
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How do Kubernetes Operators Handle Concurrency?
By default, operators built using Kubebuilder and controller-runtime process a single reconcile request at a time. This is a sensible setting, since it's easier for operator developers to reason about and debug the logic in their applications. It also constrains throughput from the controller to core Kubernetes resources like ectd and the API server.
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How to Write a Kubernetes Operator Using client-go
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.
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How to add Kubernetes-powered leader election to your Go apps
In Kubernetes, the controller-runtime package uses leader election to make controllers highly-available. In a controller deployment, resource reconciliation only occurs when a process is the leader, and other replicas are waiting on standby. If the leader pod becomes unresponsive, the remaining replicas will elect a new leader to perform subsequent reconciliations and resume normal operation.
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Kubernetes operators: avoiding the memory pitfall
To be honest, this is not a panacea, because we're rewriting some logic that also exists in controller-runtime, and very certainly it's better than us at doing it (except for not covering the use case that we need). There's also the drawback of having to deal with potential breaking changes with the controller-runtime interfaces, especially related to the Source watching. I wish it was addressed directly upstream, but this proposal was rejected: it's considered an edge case.
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Understanding the controller-runtime Cache Seriously
The controller-runtime package provides a Cache mechanism to users so that they don need to be aware of Informer's presence. By default, when you Get/List Kubernetes Objects, the Cache will automatically start Informers in the background and cache all Objects with the same GVK (GroupVersionKind).
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AWS open source newsletter, #176
operatorpkg is a set of packages used to develop Kubernetes operators at AWS. It contains opinions on top of existing projects like https://github.com/kubernetes/apimachinery and https://github.com/kubernetes-sigs/controller-runtime. In many cases, we plan to mature packages in operatorpkg before commiting them upstream.
- New Release: controller-runtime v0.16.3
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In CRDs how to set defaults for resources type?
however, at least in envtest this returns
- New Release: controller-runtime v0.15.0
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A note from our sponsor - SaaSHub
www.saashub.com | 19 Jul 2025
Stats
Basic controller-runtime repo stats
59
2,750
9.1
12 days ago
kubernetes-sigs/controller-runtime is an open source project licensed under Apache License 2.0 which is an OSI approved license.
The primary programming language of controller-runtime is Go.
Popular Comparisons
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