- kubeadm: Added better handling of errors during unmount when calling `kubeadm reset`. When failing to unmount directories under `/var/run/kubelet`, kubeadm will now throw an error instead of showing a warning and continuing to clean up said directory. In such situations, it is better for you to inspect the problem and resolve it manually. Then, you can call `kubeadm reset` again to complete the cleanup.

### SIG Azure

For 1.13 SIG Azure was focused on adding additional Azure Disk support for Ultra SSD, Standard SSD, and Premium Azure Files. Azure Availability Zones and cross resource group nodes were also moved from Alpha to Beta in 1.13.

### SIG Big Data

- Fix kubelet to properly log when a container is started. Before, sometimes the log said that a container is dead and was restarted when it was started for the first time. This only happened when using pods with initContainers and regular containers. ([#91469](https://github.com/kubernetes/kubernetes/pull/91469), [@rata](https://github.com/rata))...