- kubeadm has graduated `kubeadm alpha phase` commands to `kubeadm init phase`. This means that the phases of creating a control-plane node are now tightly integrated as part of the `init` command. Alpha features, not yet ready for GA are still kept under `kubeadm alpha` and we appreciate feedback on them.

Troubleshoot workloads that crash on startup by creating a copy of the pod that uses a different container image or command.
Troubleshoot distroless containers by adding a new container with debugging tools, either in a new copy of the pod or using an ephemeral container. (Ephemeral containers are an alpha feature that are not enabled by default.)

  linking directly to the master branch. This ensures that links reference a
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- Bug fix in test/e2e/framework  Framework.RecordFlakeIfError ([#111048](https://github.com/kubernetes/kubernetes/pull/111048), [@alingse](https://github.com/alingse)) [SIG Testing]
- Client-go: fixed an error in the fake client when creating API requests are submitted to subresources like `pods/eviction`. ([#110425](https://github.com/kubernetes/kubernetes/pull/110425), [@LY-today](https://github.com/LY-today))

  - `spec.conversion.conversionReviewVersions` is moved to `spec.conversion.webhook.conversionReviewVersions` in v1
  - `spec.versions[*].schema.openAPIV3Schema` is now required when creating v1 CustomResourceDefinitions
  - `spec.preserveUnknownFields: true` is disallowed when creating v1 CustomResourceDefinitions; it must be specified within schema definitions as `x-kubernetes-preserve-unknown-fields: true`

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* AWS cloudprovider plugin: Fix for large clusters (200+ nodes). Also fix bug with volumes not getting detached from a node after reboot. ([#48312](https://github.com/kubernetes/kubernetes/pull/48312), [@gnufied](https://github.com/gnufied))
* Fix Pods using Portworx volumes getting stuck in ContainerCreating phase. ([#48898](https://github.com/kubernetes/kubernetes/pull/48898), [@harsh-px](https://github.com/harsh-px))

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* rkt version 1.23.0+

    * known issues with the rkt runtime are [listed in the Getting Started Guide](https://kubernetes.io/docs/getting-started-guides/rkt/notes/)

* etcd version 3.0.17

* Go version: 1.8.3. [Link to announcement](https://groups.google.com/d/msg/kubernetes-dev/0XRRz6UhhTM/YODWVnuDBQAJ)