<p>
A <i>string type</i> represents the set of string values.
A string value is a (possibly empty) sequence of bytes.
The number of bytes is called the length of the string and is never negative.
Strings are immutable: once created,
it is impossible to change the contents of a string.
The predeclared string type is <code>string</code>;
it is a <a href="#Type_definitions">defined type</a>.
</p>

<p>

## Changelog since v1.18.15

## Changes by Kind

### Bug or Regression

- Avoid marking node as Ready until node has synced with API servers at least once ([#99034](https://github.com/kubernetes/kubernetes/pull/99034), [@ehashman](https://github.com/ehashman)) [SIG Node]

- kubectl now loads config file once and uses persistent client config ([#71117](https://github.com/kubernetes/kubernetes/pull/71117), [@dixudx](https://github.com/dixudx))

- Kubeadm: deprecated the kubeadm `RootlessControlPlane` feature gate (previously alpha), given that the core K8s `UserNamespacesSupport` feature gate graduated to beta in 1.30.
  Once core Kubernetes support for user namespaces is generally available and kubeadm has started to support running the control plane in userns pods, the kubeadm `RootlessControlPlane` feature gate will be removed entirely.

- PersistentVolumeClaim objects are no longer left with storage class set to `nil` forever, but will be updated retroactively once any StorageClass is set or created as default. ([#...

- For raw block CSI volumes on Kubernetes, kubelet was incorrectly calling CSI NodeStageVolume for every single "map" (i.e. raw block "mount") operation for a volume already attached to the node. This PR ensures it is only called once per volume per node. ([#112403](https://github.com/kubernetes/kubernetes/pull/112403), [@akankshakumari393](https://github.com/akankshakumari393)) [SIG Storage]

- Client-go: fix that paged list calls with ResourceVersionMatch set would fail once paging kicked in. ([#107336](https://github.com/kubernetes/kubernetes/pull/107336), [@fasaxc](https://github.com/fasaxc)) [SIG API Machinery]

Kubernetes components that accepted X.509 client certificate authentication now read the user UID from a certificate subject name RDN with object ID `1.3.6.1.4.1.57683.2`. An RDN with this object ID had to contain a string value and appear no more than once in the certificate subject. Reading the user UID from this RDN could be disabled by setting the beta feature gate `AllowParsingUserUIDFromCertAuth` to `false`(until the feature gate graduated to GA). ([#127897](https://github.com/kubernetes/kubernetes/pull/127897),...

- api-machinery utility functions `SetTransportDefaults` and `DialerFor` once again respect custom Dial functions set on transports ([#65547](https://github.com/kubernetes/kubernetes/pull/65547), [@liggitt](https://github.com/liggitt))

  For more information, see [#57198](https://github.com/kubernetes/kubernetes/issues/57198).

*   Mutating and validating webhook configurations are continuously polled by the API server (once per second). This issue will be fixed in a future release.

  For more information, see [#56357](https://github.com/kubernetes/kubernetes/issues/56357).