scalability testing in a continuous integration (CI) environment. The SIG
defined a concrete process for scalability testing, created
documentation for the current scalability thresholds, and defined a new set of
Service Level Indicators (SLIs) and Service Level Objectives (SLOs) for the system.
Here's the release [scalability validation report].

[SIG Scalability]: https://github.com/kubernetes/community/tree/master/sig-scalability

  optional bool stdin = 1;

  // Stdout if true indicates that stdout is to be redirected for the attach call.
  // Defaults to true.
  // +optional
  optional bool stdout = 2;

  // Stderr if true indicates that stderr is to be redirected for the attach call.
  // Defaults to true.
  // +optional
  optional bool stderr = 3;

  // TTY if true indicates that a tty will be allocated for the attach call.

provided. The metric `serviceaccount_stale_tokens_total` can be used to monitor for workloads that are depending on the extended lifetime and are continuing to use tokens even after a refreshed token is provided to the container. If that metric indicates no existing workloads are depending on extended lifetimes, injected token lifetime can be shortened to 1 hour by starting `kube-apiserver` with `--service-account-extend-token-expiration=false`. ([#95667](https://github.com/kubernetes/kubernetes/pull/95667),...

- Truncates a message if it hits the NoteLengthLimit when the scheduler records an event for the pod that indicates the pod has failed to schedule. ([#98715](https://github.com/kubernetes/kubernetes/pull/98715), [@carlory](https://github.com/carlory)) [SIG Scheduling]

- Added a new label `type` to `apiserver_flowcontrol_request_execution_seconds` metric - it has the following values: - 'regular': indicates that it is a non long running request - 'watch': indicates that it is a watch request. ([#105517](https://github.com/kubernetes/kubernetes/pull/105517), [@tkashem](https://github.com/tkashem))

  * apiserver_request_total
  * apiserver_request_duration_seconds  

### Autoscaling

- Horizontal Pod Autoscaling can now scale targets up even when one or more metrics are invalid/unavailable, as long as one metric indicates a scale up should occur. ([#78503](https://github.com/kubernetes/kubernetes/pull/78503), [@gjtempleton](https://github.com/gjtempleton))


### AWS

- Kubemark: added two flags, `--kube-api-qps` which indicates the maximum QPS to the apiserver, and `--kube-api-burst` which indicates maximum burst for throttle to the apiserver. ([#124147](https://github.com/kubernetes/kubernetes/pull/124147), [@devincd](https://github.com/devincd))

- The `rejected` label in `apiserver_admission_webhook_admission_duration_seconds` metrics now properly indicates if the request was rejected. ([#81399](https://github.com/kubernetes/kubernetes/pull/81399), [@roycaihw](https://github.com/roycaihw))

(as opposed to the three characters <code>...</code>) is not a token of the Go
language.
</p>

<p>
A link of the form [<a href="#Language_versions">Go 1.xx</a>] indicates that a described
language feature (or some aspect of it) was changed or added with language version 1.xx and
thus requires at minimum that language version to build.