The Kubernetes community [has written a blog post about this in detail](https://blog.k8s.io/2020/12/02/dont-panic-kubernetes-and-docker/) with [a dedicated FAQ page for it](https://blog.k8s.io/2020/12/02/dockershim-faq/).

### External credential provider for client-go

### Moved container registry service from k8s.gcr.io to registry.k8s.io

[Moving container registry from k8s.gcr.io to registry.k8s.io](https://github.com/kubernetes/kubernetes/pull/109938) got merged. For more details, see the [wiki page](https://github.com/kubernetes/k8s.io/wiki/New-Registry-url-for-Kubernetes-\(registry.k8s.io\)), [announcement](https://groups.google.com/a/kubernetes.io/g/dev/c/DYZYNQ_A6_c/m/oD9_Q8Q9AAAJ) was sent to the kubernetes development mailing list.

- `kubelet_pleg_relist_latency_microseconds` -> `kubelet_pleg_relist_duration_seconds`
- `kubelet_pleg_relist_interval_microseconds` -> `kubelet_pleg_relist_interval_seconds`
- `kubelet_eviction_stats_age_microseconds` -> `kubelet_eviction_stats_age_seconds`
- `kubelet_runtime_operations` -> `kubelet_runtime_operations_total`
- `kubelet_runtime_operations_latency_microseconds` -> `kubelet_runtime_operations_duration_seconds`

- Added `ImageMaximumGCAge` field to Kubelet configuration, which allows a user to set the maximum age an image is unused before it's garbage collected. ([#121275](https://github.com/kubernetes/kubernetes/pull/121275), [@haircommander](https://github.com/haircommander))

- Change `kubectl diff --invalid-arg` status code from 1 to 2 to match docs ([#105445](https://github.com/kubernetes/kubernetes/pull/105445), [@ardaguclu](https://github.com/ardaguclu))
- Changed kubectl describe to compute age of an event using the `EventSeries.count` and `EventSeries.lastObservedTime`. ([#104482](https://github.com/kubernetes/kubernetes/pull/104482), [@harjas27](https://github.com/harjas27))