147520fcf4
Automatic merge from submit-queue (batch tested with PRs 63437, 68081). If you want to cherry-pick this change to another branch, please follow the instructions here: https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md. fix #51135 make CFS quota period configurable **What this PR does / why we need it**: This PR makes it possible for users to change CFS quota period from the default 100ms to some other value between 1µs and 1s. #51135 shows that multiple production users have serious issues running reasonable workloads in kubernetes. The latency added by the 100ms CFS quota period is adding way too much time. **Which issue(s) this PR fixes**: Fixes #51135 **Special notes for your reviewer**: - 5ms is used by user experience https://github.com/kubernetes/kubernetes/issues/51135#issuecomment-384908627 - Latency added caused by CFS 100ms is shown at https://github.com/kubernetes/kubernetes/issues/51135#issuecomment-373454012 - explanation why we should not disable limits https://github.com/kubernetes/kubernetes/issues/51135#issuecomment-385346661 - agreement found at kubecon EU 2018: https://github.com/kubernetes/kubernetes/issues/51135#issuecomment-386623964 **Release note**: ```release-note Adds a kubelet parameter and config option to change CFS quota period from the default 100ms to some other value between 1µs and 1s. This was done to improve response latencies for workloads running in clusters with guaranteed and burstable QoS classes. ``` |
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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.