4ff8cb60fa
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>. kubenet: yield lock while executing CNI plugin. The CNI plugin can take up to 3 seconds to execute. CNI plugins can safely be executed in parallel, so yield the lock to speed up pod creation. This caused problems with the pod latency tests - previously, CNI plugins executed in under 20ms. Now they must wait for DAD to finish and addresses to leave tentative state. Fixes: #54651 **What this PR does / why we need it**: After upgrading CNI plugins to v0.6 in #51250, the pod latency tests began failing. This is because the plugins, in order to support IPv6, need to wait for DAD to finish. Because this delay is while the kubenet lock is held, it significantly slows down the pod creation rate. **Special notes for your reviewer**: The CNI plugins also do locking for their critical paths, so it is safe to run them concurrently. **Release note**: ```release-note NONE ```
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
If you are less impatient, head over to the developer's documentation.
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