24bc761aec
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>. Support containerized kubelet in CI **What this PR does / why we need it**: * Adjust hyperkube Makefile to allow HYPERKUBE_BIN to be specified from outside * new DOCKER_ROOT variable to specify --root-dir and associated volume for kubelet to know where docker directory lives * Save the docker logs when we kill the kubelet container * Allow customized image for dockerized kubelet and build a Default image if one is not specified We should allow a custom build using script we have: `VERSION="latest" REGISTRY="k8s.gcr.io" hack/dev-push-hyperkube.sh` to be used quickly using DOCKERIZE_KUBELET. To do this we remove the hard coded `k8s.gcr.io/kubelet` image and introduce a new environment variable `KUBELET_IMAGE`. Note that we are switching to hyperkube from kubelet as we have a quick and easy script to build hyperkube image and load it into local docker daemon. This reduces bad hacks like `docker tag k8s.gcr.io/hyperkube-amd64:<tag> k8s.gcr.io/kubelet:latest` being used by folks today (see 62057) * Better cope with PID 0 when running "docker inspect" to look for the process id for kubelet container **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 # **Special notes for your reviewer**: **Release note**: ```release-note NONE ```
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.
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