<p>
The number of map elements is called its length.
For a map <code>m</code>, it can be discovered using the
built-in function <a href="#Length_and_capacity"><code>len</code></a>
and may change during execution. Elements may be added during execution
using <a href="#Assignment_statements">assignments</a> and retrieved with
<a href="#Index_expressions">index expressions</a>; they may be removed with the

    - `apiserver_flowcontrol_nominal_limit_seats`: Nominal number of execution seats configured for each priority level
    - `apiserver_flowcontrol_lower_limit_seats`: Configured lower bound on number of execution seats available to each priority level
    - `apiserver_flowcontrol_upper_limit_seats`: Configured upper bound on number of execution seats available to each priority level

- Kubeadm: unhide the "etcd-join" phase of "kubeadm join" to allow on-demand execution of the phase if the ControlPlaneLocalMode feature gate is not enabled ([#135482](https://github.com/kubernetes/kubernetes/pull/135482), [@borovetsav](https://github.com/borovetsav)) [SIG Cluster Lifecycle]

- The scheduler's metric `plugin_execution_duration_seconds` now records `PreEnqueue` plugins execution seconds. ([#116201](https://github.com/kubernetes/kubernetes/pull/116201), [@sanposhiho](https://github.com/sanposhiho))

- Kubeadm: during execution of the `certs check-expiration` command, treat the etcd CA as external if there is a missing etcd CA key file (etcd/ca.key) and perform the proper validation on certificates signed by the etcd CA. Additionally, make sure that the CA for all entries...

- Kubeadm: during execution of the "check expiration" command, treat the etcd CA as external if there is a missing etcd CA key file (etcd/ca.key) and perform the proper validation on certificates signed by the etcd CA. Additionally, make sure that the CA for all entries in...

- Kubeadm: unhide the "etcd-join" phase of "kubeadm join" to allow on-demand execution of the phase if the ControlPlaneLocalMode feature gate is not enabled ([#135481](https://github.com/kubernetes/kubernetes/pull/135481), [@borovetsav](https://github.com/borovetsav)) [SIG Cluster Lifecycle]

  The `--` separator has been recommended since the Kubernetes v1.18 release, which also deprecated the legacy way of invoking `kubectl exec`.
  
  This change aligns with the deprecation of legacy `kubectl exec` command execution and enforces the use of `kubectl exec [POD] -- [COMMAND]` for improved compatibility and adherence to recommended practices."

- Kubeadm: during execution of the "check expiration" command, treat the etcd CA as external if there is a missing etcd CA key file (etcd/ca.key) and perform the proper validation on certificates signed by the etcd CA. Additionally, make sure that the CA for all entries in...