}

	timer := time.NewTimer(waitInterval())
	defer timer.Stop()

	lastPurgeHour := -1
	for {
		select {
		case <-timer.C:
			// Load all IAM items (except STS creds) periodically.
			refreshStart := time.Now()
			if err := sys.Load(ctx, false); err != nil {
				iamLogIf(ctx, fmt.Errorf("Failure in periodic refresh for IAM (duration: %s): %v", time.Since(refreshStart), err), logger.WarningKind)

* Setting TLS1.2 minimum because TLS1.0 and TLS1.1 are vulnerable ([#26169](https://github.com/kubernetes/kubernetes/pull/26169), [@victorgp](https://github.com/victorgp))
* Kubelet: Periodically reporting image pulling progress in log ([#26145](https://github.com/kubernetes/kubernetes/pull/26145), [@Random-Liu](https://github.com/Random-Liu))

* Fix AWS NLB security group updates where valid security group ports were incorrectly removed ([#68422](https://githu...

* Kubelet: replace `du` and `find` with a golang implementation ([#74675](https://github.com/kubernetes/kubernetes/pull/74675), [@dashpole](https://github.com/dashpole))
    * Kubelet: periodically update machine info to support hot-add/remove

  * Fix erroneous FailedSync and FailedMount events being periodically and indefinitely posted on Pods after kubelet is restarted. ([#44781](https://github.com/kubernetes/kubernetes/pull/44781), [@wongma7](https://github.com/wongma7))

* Fix log spam due to unnecessary status update when node is deleted. ([#45923](https://github.com/kubernetes/kubernetes/pull/45923), [@verult](https://github.com/verult))
* Poll all active pods periodically for volumes to fix out of order pod & node addition events. Fixes volumes not getting detached after controller restart. ([#42033](https://github.com/kubernetes/kubernetes/pull/42033), [@NickrenREN](https://github.com/NickrenREN))

#### Garbage Collector
* The garbage collector now supports custom APIs added via Custom Resource Definitions
  or aggregated API servers. The garbage collector controller refreshes periodically.
  Therefore, expect a latency of about 30 seconds between when an API is added and when
  the garbage collector starts to manage it.


#### Monitoring/Prometheus

  - Clients should reload the token from disk periodically (once per minute is recommended) to ensure they continue to use a valid token. `k8s.io/client-go` version v11.0.0+ and v0.15.0+ reload tokens automatically.

- Try to send watch bookmarks (if requested) periodically in addition to sending them right before timeout ([#90560](https://github.com/kubernetes/kubernetes/pull/90560), [@wojtek-t](https://github.com/wojtek-t)) [SIG API Machinery]

### Misc

- Service account controller clients to now use the TokenRequest API, and tokens are periodically rotated. ([#72179](https://github.com/kubernetes/kubernetes/pull/72179), [@WanLinghao](https://github.com/WanLinghao))