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Currently, Docker make IPC of every container shareable by default, which means other containers can join it's IPC namespace. This is implemented by creating a tmpfs mount on the host, and then bind-mounting it to a container's /dev/shm. Other containers that want to share the same IPC (and the same /dev/shm) can also bind-mount the very same host's mount. Now, since https://github.com/moby/moby/commit/7120976d7 (https://github.com/moby/moby/pull/34087) there is a possiblity to have per-daemon default of having "private" IPC mode, meaning all the containers created will have non-shareable /dev/shm. For shared IPC to work in the above scenario, we need to explicitly make the "pause" container's IPC mode as "shareable", which is what this commit does. To test: add "default-ipc-mode: private" to /etc/docker/daemon.json, try using kube as usual, there should be no errors. Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
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.