5686664a1d
Normally, the PV controller knows about the PVC that triggers the creation of a PV before it sees the PV, because the PV controller must set the volume.beta.kubernetes.io/storage-provisioner annotation that tells an external provisioner to create the PV. When restarting, the PV controller first syncs its caches, so that case is also covered. However, the creator of a PVC might decided to set that annotation itself to speed up volume creation. While unusual, it's not forbidden and thus part of the external Kubernetes API. Whether it makes sense depends on the intentions of the user. When that is done and there is heavy load, an external provisioner might see the PVC and create a PV before the PV controller sees the PVC. If the PV controller then encounters the PV before the PVC, it incorrectly concludes that the PV needs to be deleted instead of being bound. The same issue occurred earlier for external binding and the existing code for looking up a PVC in the cache or in the apiserver solves the issue also for volume provisioning, it just needs to be enabled also for PVs without the pv.kubernetes.io/bound-by-controller annotation.
Kubernetes
Kubernetes 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 Kubernetes
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 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.
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.