2c8fc26b89
Update the sample device plugin to enable the e2e node tests (or any other entity with full access to the node filesystem) to control the registration process. We add a new environment variable `REGISTER_CONTROL_FILE`. The value of this variable must be a file which prevents the plugin to register itself while it's present. Once removed, the plugin will go on and complete the registration. The plugin will automatically detect the parent directory on which the file resides and detect deletions, unblocking the registration process. If the file is specified but unaccessible, the plugin will fail. If the file is not specified, the registration process will progress as usual and never pause. The plugin will need read access to the parent directory. This feature is useful because it is not possible to control the order in which the pods are recovered after node reboot/kubelet restart. In this approach, the testing environment will create a directory and then a empty file to pause the registration process of the plugin. Once pointed to that file, the plugin will start and wait for it to be deleted. Only after the directory has been deleted, the plugin would proceed to registration. This feature is used in #114640 where e2e test is implemented to simulate scenarios where application pods requesting devices come up before the device plugin pod on node reboot/ kubelet restart. Co-authored-by: Francesco Romani <fromani@redhat.com> Signed-off-by: Swati Sehgal <swsehgal@redhat.com> |
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Kubernetes (K8s)
Kubernetes, also known as K8s, is an open source system for managing containerized applications across multiple hosts. It provides 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 your company 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 K8s
See our documentation on kubernetes.io.
Try our interactive tutorial.
Take a free course on Scalable Microservices with Kubernetes.
To use Kubernetes code as a library in other applications, see the list of published components.
Use of the k8s.io/kubernetes module or k8s.io/kubernetes/... packages as libraries is not supported.
To start developing K8s
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.
mkdir -p $GOPATH/src/k8s.io
cd $GOPATH/src/k8s.io
git clone https://github.com/kubernetes/kubernetes
cd 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.
Community Meetings
The Calendar has the list of all the meetings in Kubernetes community in a single location.
Adopters
The User Case Studies website has real-world use cases of organizations across industries that are deploying/migrating to Kubernetes.
Governance
Kubernetes project is governed by a framework of principles, values, policies and processes to help our community and constituents towards our shared goals.
The Kubernetes Community is the launching point for learning about how we organize ourselves.
The Kubernetes Steering community repo is used by the Kubernetes Steering Committee, which oversees governance of the Kubernetes project.
Roadmap
The Kubernetes Enhancements repo provides information about Kubernetes releases, as well as feature tracking and backlogs.