* kubelet `--cert-dir` now defaults to `/var/lib/kubelet/pki`, in order to ensure bootstrapped and rotated certificates persist beyond a reboot. resolves an issue in kubeadm with false-positive `/var/lib/kubelet is not empty` message during pre-flight checks ([#53317](https://github.com/kubernetes/kubernetes/pull/53317), [@liggitt](https://github.com/liggitt))

- Fixed cleanup of block devices when /var/lib/kubelet is a symlink. ([#96889](https://github.com/kubernetes/kubernetes/pull/96889), [@jsafrane](https://github.com/jsafrane)) [SIG Storage]

- Fixed kubelet startup getting stuck with `NewVolumeManagerReconstruction` feature enabled and a CSI volume present in /var/lib/kubelet/pods. ([#117804](https://github.com/kubernetes/kubernetes/pull/117804), [@jsafrane](https://github.com/jsafrane)) [SIG Node and Storage]

`client-certificate: /var/lib/kubelet/pki/kubelet-client-current.pem` and `client-key: /var/lib/kubelet/pki/kubelet-client-current.pem`, replacing the embedded client certificate and key. ([#84118](https://github.com/kubernetes/kubernetes/pull/84118), [@neolit123](https://github.com/neolit123))

* kubelet `--cert-dir` now defaults to `/var/lib/kubelet/pki`, in order to ensure bootstrapped and rotated certificates persist beyond a reboot. resolves an issue in kubeadm with false-positive `/var/lib/kubelet is not empty` message during pre-flight checks ([#53317](https://github.com/kubernetes/kubernetes/pull/53317), [@liggitt](https://github.com/liggitt))

- Fixed kubelet startup getting stuck with `NewVolumeManagerReconstruction` feature enabled and a CSI volume present in /var/lib/kubelet/pods. ([#117804](https://github.com/kubernetes/kubernetes/pull/117804), [@jsafrane](https://github.com/jsafrane)) [SIG Node and Storage]

* "kubeadm init" now writes a structured and versioned kubelet ComponentConfiguration file to `/var/lib/kubelet/config.yaml` and an environment file with runtime flags that you can source in the systemd kubelet dropin to `/var/lib/kubelet/kubeadm-flags.env`. ([#63887](https://github.com/kubernetes/kubernetes/pull/63887), [@luxas](https://github.com/luxas))

* fix kubelet fail to delete orphaned pod directory when the kubelet's pods directory (default is "/var/lib/kubelet/pods") symbolically links to another disk device's directory ([#79094](https://github.com/kubernetes/kubernetes/pull/79094), [@gaorong](https://github.com/gaorong))

  - build: Update to k/repo-infra@v0.1.1 (supports go1.15.2)
  - build: Use go-runner:buster-v2.0.1 (built using go1.15.1)
  - bazel: Replace --features with Starlark build settings flag
  - hack/lib/util.sh: some bash cleanups
    
    - switched one spot to use kube::logging
    - make kube::util::find-binary return an error when it doesn't find
      anything so that hack scripts fail fast instead of with "binary not

- kubeadm reset: unmount directories under `/var/lib/kubelet` for Linux only ([#81494](https://github.com/kubernetes/kubernetes/pull/81494), [@Klaven](https://github.com/Klaven))