- Fixed a bug that on k8s nodes, when the policy of INPUT chain in filter table is not ACCEPT, healthcheck nodeport would not work.

  IMPORTANT: Kubernetes interprets leading zeros on IPv4 addresses as decimal, users must not rely on parser alignment to not being impacted by the associated security advisory:
  CVE-2021-29923 golang standard library "net" - Improper Input Validation of octal literals in golang 1.16.2 and below standard library "net" results in indeterminate SSRF & RFI vulnerabilities.

- Improvements were made to `kubeadm reset` related to cleaning  etcd and notifying the user about the state of iptables.
- kubeadm commands now print warnings if input YAML documents contain unknown or duplicate fields.
- kubeadm now properly recognizes Docker 18.09.0 and newer, but still treats 18.06 as the default supported version.

* Upgrade golang version to 1.7.6 ([#46405](https://github.com/kubernetes/kubernetes/pull/46405), [@cblecker](https://github.com/cblecker))
* kube-proxy handling of services with no endpoints now applies to both INPUT and OUTPUT chains, preventing socket leak. ([#43972](https://github.com/kubernetes/kubernetes/pull/43972), [@thockin](https://github.com/thockin))

* Set default CIDR to /16 for Juju deployments ([#49182](https://github.com/kubernetes/kubernetes/pull/49182), [@ktsakalozos](https://github.com/ktsakalozos))
* Fix pod preset to ignore input pod namespace in favor of request namespace ([#49120](https://github.com/kubernetes/kubernetes/pull/49120), [@jpeeler](https://github.com/jpeeler))

publishVolume, and NodePublishVolume/NodeUnpublishVolume operations. Before this change all API calls had to fetch key/value stored in secret and use it to authenticate/authorize these operations. With this change API calls receive key/value as a input parameter so they not need to know where and how credentials were stored and fetched. Main goal was to make these API calls CO (Container Orchestrator) agnostic.  ([#60118](https://github.com/kubernetes/kubernetes/pull/60118), [@sbezverk](https://...