915b772f9b
Automatic merge from submit-queue (batch tested with PRs 49861, 50933, 51380, 50688, 51305) Add configurable groups to bootstrap tokens. **What this PR does / why we need it**: This change adds support for authenticating bootstrap tokens into a configurable set of extra groups in addition to `system:bootstrappers`. Previously, bootstrap tokens could only ever authenticate to the `system:bootstrappers` group. Groups are specified as a comma-separated list in the `auth-extra-groups` key of the `bootstrap.kubernetes.io/token` Secret, and must begin with the prefix `system:bootstrapper:` (and match a validation regex that checks against our normal convention). Whether or not any extra groups are configured, `system:bootstrappers` will still be added. This also adds a `--groups` flag for `kubeadm token create`, which sets the `auth-extra-groups` key on the resulting Secret. The default is to not set the key. `kubeadm token list` is also updated to include a `EXTRA GROUPS` output column. **Which issue this PR fixes**: fixes #49306 **Special notes for your reviewer**: The use case for this is in https://github.com/kubernetes/kubernetes/issues/49306. Comments on the feature itself are probably better over there. It will be part of how HA/self-hosting kubeadm bootstraps new master nodes (post 1.8). **Release note**: ```release-note Add support for configurable groups for bootstrap token authentication. ``` cc @luxas @kubernetes/sig-cluster-lifecycle-api-reviews @kubernetes/sig-auth-api-reviews /kind feature |
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README.md
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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