- Kubeadm: during 'upgrade apply', if the kube-proxy ConfigMap is missing, assume that kube-proxy should not be upgraded. Same applies to a missing kube-dns/coredns ConfigMap for the DNS server addon. Note that this is a temporary workaround until 'upgrade apply' supports phases. Once phases are supported the kube-proxy/dns upgrade should be skipped manually. ([#89593](https://github.com/kubernetes/kubernetes/pull/89593), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]...

        `InvalidArgumentError,` as documented.
    *   Update Getting Started docs and API intro.
*   Google Cloud Storage (GCS):
    *   Add userspace DNS caching for the GCS client.
    *   Customize request timeouts for the GCS filesystem.
    *   Improve GCS filesystem caching.
*   Bug Fixes:
    *   Fix bug where partitioned integer variables got their wrong shapes.