0ba80021c5
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>. Disable session affinity for internal kuberntes service Under following conditions session affinity leads to a deadlock: - Self hosted controller-manager, where it talks to API servers via kubernetes service ClusterIP - default master-count reconcilier is used - --apiserver-count is set to >1 according to the help message - number of responsive APIServers goes below `apiserver-count` - all controller-managers happen to be hashed to APIServers which are down. What then happens is that controller managers never be able to contact APIServer, despite correctly working APIServer available. Less serious outages also possible for other consumers of kubernetes service, such as operators, kube-dns, flannel & calico, etc. There is always non zero chance, that given consumer is hashed to an apiserver which is down. This reverts PR https://github.com/kubernetes/kubernetes/pull/23129 /sig api-machinery CCing: - author and approver of reverted PR: @mikedanese, @lavalamp - other affected users which spoke up: @jsravn, @tatsuhiro-t ```release-note NONE ``` |
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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
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.