2cb5c47b12
Automatic merge from submit-queue (batch tested with PRs 62266, 64351, 64366, 64235, 64560). 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>. Bind mount subpath with same read/write settings as underlying volume **What this PR does / why we need it**: https://github.com/kubernetes/kubernetes/pull/63045 broke two scenarios: * If volumeMount path already exists in container image, container runtime will try to chown the volume * In SELinux system, we will try to set SELinux labels when starting the container This fix makes it so that the subpath bind mount will inherit the read/write settings of the underlying volume mount. It does this by using the "bind,remount" mount options when doing the bind mount. The underlying volume mount is ro when the volumeSource.readOnly flag is set. This is for persistent volume types like PVC, GCE PD, NFS, etc. When this is set, we won't try to configure SELinux labels. Also in this mode, subpaths have to already exist in the volume, we cannot make new directories on a read only volume. When volumeMount.readOnly is set, the container runtime is in charge of making the volume in the container readOnly, but the underlying volume mount on the host can be writable. This can be set for any volume type, and is permanently set for atomic volume types like configmaps, secrets. In this case, SELinux labels will be applied before the container runtime makes the volume readOnly. And subpaths don't have to exist. **Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*: Fixes #64120 **Special notes for your reviewer**: **Release note**: ```release-note Fixes issue for readOnly subpath mounts for SELinux systems and when the volume mountPath already existed in the container image. ``` |
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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.