89e433fca1
Automatic merge from submit-queue (batch tested with PRs 50724, 59025, 59710, 59404, 59958). 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>. dockertools: disable MemorySwap on Linux In this commit, set `MemorySwap` the same with `Memory` to prevent using swap on Linux. **What this PR does / why we need it**: In #39731, @pires tried to disable swap on Linux by setting `MemorySwap` to 0. However, according to [Docker's docs](https://docs.docker.com/config/containers/resource_constraints/#--memory-swap-details), setting `MemorySwap` to 0 is treated as unset, and its [default behavior](https://github.com/moby/moby/blob/v17.05.0-ce/daemon/daemon_unix.go#L266-L269) is to set to twice the size of `Memory`, which can still cause the container to use the swap. **Which issue(s) this PR fixes** : This issue was mentioned in this comment: https://github.com/kubernetes/kubernetes/issues/7294#issuecomment-362722637 **Special notes for your reviewer**: 1. For the case on Windows, we can still use the 0 because [Windows does not support `MemorySwap`](https://github.com/moby/moby/blob/v17.05.0-ce/daemon/daemon_windows.go#L185-L187). 2. There is another place using the `DefaultMemorySwap()` is for [sandbox](https://github.com/kubernetes/kubernetes/blob/v1.9.2/pkg/kubelet/dockershim/docker_sandbox.go#L505). Maybe setting the sandbox's `MemorySwap` to 0 is fine. I didn't change that. **Release note**: ```release-note dockertools: disable memory swap on Linux. ``` |
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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.