816f2a4868
Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Prevent resourceVersion updates for custom resources on no-op writes Fixes partly https://github.com/kubernetes/kubernetes/issues/67541 For ObjectMeta pruning, we round trip by marshalling and unmarshalling. If the ObjectMeta contained any strings with `""` (or other fields with empty values) _and_ the respective fields are `omitempty`, those fields will be lost in the round trip process. This makes ObjectMeta after the no-op write different from the one before the write. Resource version is incremented every time data is written to etcd. Writes to etcd short-circuit if the bytes being written are identical to the bytes already present. So this ends up incrementing the `resourceVersion` even on no-op writes. This PR updates the `BeforeUpdate` function such that omitempty fields have values set only if they are non-zero so that they produce an unstructured object that matches ObjectMeta omitempty semantics. /sig api-machinery /kind bug /area custom-resources /assign sttts liggitt **Release note**: ```release-note Prevent `resourceVersion` updates for custom resources on no-op writes. ``` |
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Kubernetes
Kubernetes is an open source system for managing containerized applications across multiple hosts; providing basic mechanisms for deployment, maintenance, and scaling of applications.
Kubernetes builds upon a decade and a half of experience at Google running production workloads at scale using a system called Borg, combined with best-of-breed ideas and practices from the community.
Kubernetes is hosted by the Cloud Native Computing Foundation (CNCF). If you are a company that wants to help shape the evolution of technologies that are container-packaged, dynamically-scheduled and microservices-oriented, consider joining the CNCF. For details about who's involved and how Kubernetes plays a role, read the CNCF announcement.
To start using Kubernetes
See our documentation on kubernetes.io.
Try our interactive tutorial.
Take a free course on Scalable Microservices with Kubernetes.
To start developing Kubernetes
The community repository hosts all information about building Kubernetes from source, how to contribute code and documentation, who to contact about what, etc.
If you want to build Kubernetes right away there are two options:
You have a working Go environment.
$ go get -d k8s.io/kubernetes
$ cd $GOPATH/src/k8s.io/kubernetes
$ make
You have a working Docker environment.
$ git clone https://github.com/kubernetes/kubernetes
$ cd kubernetes
$ make quick-release
For the full story, head over to the developer's documentation.
Support
If you need support, start with the troubleshooting guide, and work your way through the process that we've outlined.
That said, if you have questions, reach out to us one way or another.