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In downstream contexts, it's extremely useful to be able to combine all the "testable" images in Kubernetes into a single repo so that a user could mirror these offline in one chunk, and audit the set of images for changes. For instance, within OpenShift we would like to have a single place we can place all the images used by all the tests with a single authentication scheme. While some images are not "real" and can't be mirrored (for instance, the images that point to an auth protected registry), that is not the majority. This code makes it possible to specify an environment variable KUBE_TEST_REPO that maps the static strings of the registry to a single repository by placing the uniqueness in a tag. For instance: KUBE_TEST_REPO=quay.io/openshift/community-e2e-images would translate `k8s.gcr.io/prometheus-to-sd:v0.5.0` to `quay.io/openshift/community-e2e-images:e2e-30-k8s-gcr-io-prometheus-to-sd-v0-5-0-6JI59Yih4oaj3oQOjRfhyQ`. The tag is a safe form of the name, plus the index (the constant within manifest.go), plus a hash of the full input. The length of the tag is constrained to the minimum of hash + index + the safe name. The public method is changed to return two maps - index to original name and index to test repo name. These maps would be the same if the env var is not set.
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.