Automatic merge from submit-queue (batch tested with PRs 48665, 52849, 54006, 53755). 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>. Order PSP by name, prefer non-mutating PSPs Fixes #36184 Fixes #23217 Related to #23217 Removes unnecessary mutation of pods: * Determines effective security context for pods using a wrapper containing the pod and container security context, rather than building/setting a combined struct on every admission * Does not set `privileged:&false` on security contexts with `privileged:nil` * Does not set `runAsNonRoot:&true` on security contexts that already have a non-nil, non-0 `runAsUser` * Does not mutate/normalize container capabilities unless changes are required (missing defaultAddCapabilities or requiredDropCapabilities) Defines behavior when multiple PSP objects allow a pod: * PSPs which allow the pod as-is (no defaulting/mutating) are preferred * If the pod must be defaulted/mutated to be allowed, the first PSP (ordered by name) to allow the pod is selected * During update operations, when mutations to pod specs are disallowed, only non-mutating PSPs are used to validate the pod ```release-note PodSecurityPolicy: when multiple policies allow a submitted pod, priority is given to ones which do not require any fields in the pod spec to be defaulted. If the pod must be defaulted, the first policy (ordered by name) that allows the pod is used. ``` |
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WORKSPACE |
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.
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.