* Fix a string comparison bug in IPVS graceful termination where UDP real servers are not deleted. ([#78999](https://github.com/kubernetes/kubernetes/pull/78999), [@andrewsykim](https://github.com/andrewsykim))
* Reflector watchHandler Warning log 'The resourceVersion for the provided watch is too old.' is now logged as Info.  ([#78991](https://github.com/kubernetes/kubernetes/pull/78991), [@sallyom](https://github.com/sallyom))

* Delete all firewall rules (and optionally network) on GCE/GKE cluster teardown ([#34577](https://github.com/kubernetes/kubernetes/pull/34577), [@ixdy](https://github.com/ixdy))
* Fixed mutation warning in Attach/Detach controller ([#35273](https://github.com/kubernetes/kubernetes/pull/35273), [@jsafrane](https://github.com/jsafrane))

- [v1.6.0](#v160)
  - [Downloads for v1.6.0](#downloads-for-v160)
    - [Client Binaries](#client-binaries-13)
    - [Server Binaries](#server-binaries-13)
  - [WARNING: etcd backup strongly recommended](#warning-etcd-backup-strongly-recommended)
  - [Major updates and release themes](#major-updates-and-release-themes)
  - [Action Required](#action-required-1)
    - [Certificates API](#certificates-api)

- e2e storage tests now run faster and are easier to read ([#72434](https://github.com/kubernetes/kubernetes/pull/72434), [@pohly](https://github.com/pohly))
- `e2e.test` now rejects unknown `--provider` values instead of merely warning about them. An empty provider name is not accepted anymore and was replaced by `skeleton` (a provider with no special behavior). ([#73402](https://github.com/kubernetes/kubernetes/pull/73402), [@pohly](https://github.com/pohly))

- Fixed OpenID Connect (OIDC) token refresh when the client secret contains a special character. ([#76914](https://github.com/kubernetes/kubernetes/pull/76914), [@tsuna](https://github.com/tsuna))
- Improved `kubectl auth can-i` command by warning users when they try to access a resource out of scope. ([#76014](https://github.com/kubernetes/kubernetes/pull/76014), [@WanLinghao](https://github.com/WanLinghao))

if supported by the kernel. You should either adjust your CPU limit, or set CPU
request only, if you want to avoid hardcapping. If the kernel does not support
CPU Quota, NodeStatus will contain a warning indicating that CPU Limits cannot
be enforced.

* kubectl: Fix bug that showed terminated/evicted pods even without `--show-all`. ([#48786](https://github.com/kubernetes/kubernetes/pull/48786), [@janetkuo](https://github.com/janetkuo))
* Add a runtime warning about the kubeadm default token TTL changes. ([#48838](https://github.com/kubernetes/kubernetes/pull/48838), [@mattmoyer](https://github.com/mattmoyer))

* Validate-cluster finishes shortly after at most ALLOWED_NOTREADY_NODE… ([#26778](https://github.com/kubernetes/kubernetes/pull/26778), [@gmarek](https://github.com/gmarek))
* AWS kube-down: Issue warning if VPC not found ([#27518](https://github.com/kubernetes/kubernetes/pull/27518), [@justinsb](https://github.com/justinsb))

- `kubeadm`: updated warning message when swap space is detected. When swap is
  active on Linux, `kubeadm` explains that swap is supported for cgroup v2 only and

- Kubectl apply: warning that kubectl will ignore no-namespaced resource `pv & namespace` in a future release if the namespace is specified and allowlist is not specified. ([#110907](https://github.com/kubernetes/kubernetes/pull/110907), [@pacoxu](https://github.com/pacoxu))...