- 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.

- Kube-apiserver now reloads serving certificates from disk every minute to allow rotation without restarting the server process ([#84200](https://github.com/kubernetes/kubernetes/pull/84200), [@jackkleeman](https://github.com/jackkleeman))

		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
		return
	}
	profileStr := r.Form.Get("profilerType")
	profiles := strings.Split(profileStr, ",")
	duration := time.Minute
	if dstr := r.Form.Get("duration"); dstr != "" {
		var err error
		duration, err = time.ParseDuration(dstr)
		if err != nil {
			writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrInvalidRequest), r.URL)

* Update to go1.11.5 ([#73326](https://github.com/kubernetes/kubernetes/pull/73326), [@ixdy](https://github.com/ixdy))
* add goroutine to move unschedulable pods to activeq if they are not retried for more than 1 minute ([#72558](https://github.com/kubernetes/kubernetes/pull/72558), [@denkensk](https://github.com/denkensk))

			return err
		}
		ctx = lkctx.Context()
		defer lk.Unlock(lkctx)
	}

	if !opts.Force {
		results := make(chan itemOrErr[ObjectInfo])

		ctx, cancel := context.WithTimeout(ctx, time.Minute)
		defer cancel()
		err := z.Walk(ctx, bucket, "", results, WalkOptions{Limit: 1})
		if err != nil {
			s3LogIf(ctx, fmt.Errorf("unable to verify if the bucket %s is empty: %w", bucket, err))

	// IAM group members file
	iamGroupMembersFile = "members.json"

	// IAM format file
	iamFormatFile = "format.json"

	iamFormatVersion1 = 1

	minServiceAccountExpiry time.Duration = 15 * time.Minute
	maxServiceAccountExpiry time.Duration = 365 * 24 * time.Hour
)

var errInvalidSvcAcctExpiration = errors.New("invalid service account expiration")

type iamFormat struct {
	Version int `json:"version"`
}

* We change the default attach_detach_controller sync period to 1 minute to reduce the query frequency through cloud provider to check whether volumes are attached or not.  ([#41363](https://github.com/kubernetes/kubernetes/pull/41363), [@jingxu97](https://github.com/jingxu97))

## Changelog since v1.5.2

### Other notable changes

* We change the default attach_detach_controller sync period to 1 minute to reduce the query frequency through cloud provider to check whether volumes are attached or not.  ([#41363](https://github.com/kubernetes/kubernetes/pull/41363), [@jingxu97](https://github.com/jingxu97))

- Kubeadm: bumped the timeout of the `kubeadm upgrade` `CreateJob` preflight check to 1 minute. This allows Windows worker nodes to have more time to run the preflight check. It uses the `pause` image, so if you are experiencing slow pull times, you can either pre-pull the new pause on the work using `kubeadm config images pull --kubernetes-version...

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