- `kubeadm`: Added a preflight check `ContainerRuntimeVersion` to validate if the installed container runtime supports the `RuntimeConfig` gRPC method. If unsupported, `kubeadm` prints a warning message.
  

KubeProxyConfiguration After:

```
apiVersion: kubeproxy.config.k8s.io/v1alpha1
kind: KubeProxyConfiguration
**featureGates:**
**  SupportIPVSProxyMode: true**
```

If your cluster was installed by kubeadm, you should edit the `featureGates` field in the `kubeadm-config` ConfigMap. You can do this using `kubectl -n kube-system edit cm kubeadm-config` before upgrading. For example:

kubeadm-config Before:

```

- New addon in addon manager that automatically installs CSI CRDs if CSIDriverRegistry or CSINodeInfo feature gates are true. ([#70193](https://github.com/kubernetes/kubernetes/pull/70193), [@saad-ali](https://github.com/saad-ali))

## Known Issues

### LocalStorageCapacityIsolationFSQuotaMonitoring ConfigMap rendering failure

- Removed attachable volume limits from the capacity of the node for the following
  volume type when the kubelet was started, affecting the following volume types
  when the corresponding csi driver was installed:
  - `awsElasticBlockStore` for `ebs.csi.aws.com`
  - `azureDisk` for `disk.csi.azure.com`
  - `gcePersistentDisk` for `pd.csi.storage.googleapis.com`
  - `cinder` for `cinder.csi.openstack.org`
  - `csi`

</p>

<p>
The interpretation of the ImportPath is implementation-dependent but
it is typically a substring of the full file name of the compiled
package and may be relative to a repository of installed packages.
</p>

<p>
Implementation restriction: A compiler may restrict ImportPaths to
non-empty strings using only characters belonging to

    * platforms would be satisfied by manually-created PersistentVolume objects.
    * Administrators can choose to disable this behavior by deleting the automatically
    * installed StorageClass API object. Alternatively, administrators may choose to
    * keep the automatically installed StorageClass and only disable the defaulting
    * behavior by removing the "is-default-class" annotation from the StorageClass
    * API object.

pkg regexp/syntax, const ErrTrailingBackslash ErrorCode
pkg regexp/syntax, const FoldCase Flags
pkg regexp/syntax, const InstAlt InstOp
pkg regexp/syntax, const InstAltMatch InstOp
pkg regexp/syntax, const InstCapture InstOp
pkg regexp/syntax, const InstEmptyWidth InstOp
pkg regexp/syntax, const InstFail InstOp
pkg regexp/syntax, const InstMatch InstOp
pkg regexp/syntax, const InstNop InstOp

pkg regexp/syntax, const ErrUnexpectedParen ErrorCode
pkg regexp/syntax, const FoldCase = 1
pkg regexp/syntax, const InstAlt = 0
pkg regexp/syntax, const InstAltMatch = 1
pkg regexp/syntax, const InstCapture = 2
pkg regexp/syntax, const InstEmptyWidth = 3
pkg regexp/syntax, const InstFail = 5
pkg regexp/syntax, const InstMatch = 4
pkg regexp/syntax, const InstNop = 6
pkg regexp/syntax, const InstRune = 7