236fa894df
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>. Monitor the /kubepods cgroup for allocatable metrics **What this PR does / why we need it**: The current implementation of allocatable memory evictions sums the usage of pods in order to compute the total usage by user processes. This PR changes this to instead monitor the `/kubepods` cgroup, which contains all pods, and use this value directly. This is more accurate than summing pod usage, as it is measured at a single point in time. This also collects metrics from this cgroup on-demand. This PR is a precursor to memcg notifications on the `/kubepods` cgroup. This removes the dependency the eviction manager has on the container manager, and adds a dependency for the summary collector on the container manager (to get Cgroup Root) This also changes the way that the allocatable memory eviction signal and threshold are added to make them in-line with the memory eviction signal to address #53902 **Which issue(s) this PR fixes**: Fixes #55638 Fixes #53902 **Special notes for your reviewer**: I have tested this, and can confirm that it works when CgroupsPerQos is set to false. In this case, it returns node metrics, as it is monitoring the `/` cgroup, rather than the `/kubepods` cgroup (which doesn't exist). **Release note**: ```release-note Expose total usage of pods through the "pods" SystemContainer in the Kubelet Summary API ``` cc @sjenning @derekwaynecarr @vishh @kubernetes/sig-node-pr-reviews |
||
|---|---|---|
| .github | ||
| api | ||
| build | ||
| cluster | ||
| cmd | ||
| docs | ||
| examples | ||
| Godeps | ||
| hack | ||
| logo | ||
| pkg | ||
| plugin | ||
| staging | ||
| test | ||
| third_party | ||
| translations | ||
| vendor | ||
| .bazelrc | ||
| .generated_files | ||
| .gitattributes | ||
| .gitignore | ||
| .kazelcfg.json | ||
| BUILD.bazel | ||
| CHANGELOG-1.2.md | ||
| CHANGELOG-1.3.md | ||
| CHANGELOG-1.4.md | ||
| CHANGELOG-1.5.md | ||
| CHANGELOG-1.6.md | ||
| CHANGELOG-1.7.md | ||
| CHANGELOG-1.8.md | ||
| CHANGELOG-1.9.md | ||
| CHANGELOG-1.10.md | ||
| CHANGELOG.md | ||
| code-of-conduct.md | ||
| CONTRIBUTING.md | ||
| labels.yaml | ||
| LICENSE | ||
| Makefile | ||
| Makefile.generated_files | ||
| OWNERS | ||
| OWNERS_ALIASES | ||
| README.md | ||
| SUPPORT.md | ||
| WORKSPACE | ||
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.