- Implement the scheduling framework with `Reserve`, `Prebind`, `Permit`, `Post-bind`, `Queue sort` and `Unreserve` extension points.
([#77567](https://github.com/kubernetes/kubernetes/pull/77567), [@wgliang](https://github.com/wgliang))

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kubelet performing the TLS Bootstrap properly. Earlier, `kubeadm join` only did the discovery part and exited successfully without checking that the kubelet actually started properly and performed the TLS bootstrap correctly. Now, as kubeadm runs some post-join steps (for example, annotating the Node API object with the CRISocket), `kubeadm join` is now waiting for the kubelet to perform the TLS Bootstrap, and then uses that credential to perform further actions. This also improves the UX, as `kubeadm`...

    }

    /**
     * Performs routine cleanup prior to executing a write. This should be called every time a write
     * thread acquires the segment lock, immediately after acquiring the lock.
     *
     * <p>Post-condition: expireEntries has been run.
     */
    @GuardedBy("this")
    void preWriteCleanup(long now) {
      runLockedCleanup(now);
    }

    /** Performs routine cleanup following a write. */

- Take the context as the first argument of Schedule. ([#82119](https://github.com/kubernetes/kubernetes/pull/82119), [@wgliang](https://github.com/wgliang))
- Implement `post-filter` extension point for scheduling framework ([#78097](https://github.com/kubernetes/kubernetes/pull/78097), [@draveness](https://github.com/draveness))

				"application/vnd.3gpp.pic-bw-var",
				"application/vnd.3gpp.sms",
				"application/vnd.3gpp2.bcmcsinfo+xml",
				"application/vnd.3gpp2.sms",
				"application/vnd.3gpp2.tcap",
				"application/vnd.3m.post-it-notes",
				"application/vnd.accpac.simply.aso",
				"application/vnd.accpac.simply.imp",
				"application/vnd.acucobol",
				"application/vnd.acucorp",

- '`CSIMigrationvSphere` was upgraded to GA and locked to true. Do not upgrade to K8s
  1.26 if you need Windows, or XFS, or raw block support until vSphere CSI Driver
  adds support for them in a version post v2.7.x.'
   ([#113336](https://github.com/kubernetes/kubernetes/pull/113336), [@divyenpatel](https://github.com/divyenpatel))
- '`DelegateFSGroupToCSIDriver` feature is GA.'

* If CSINodeInfo and CSIMigration feature flags are active in the cluster, Kubelet will post NotReady until CSINode is initialized with basic volume plugin mechanism information for well-known drivers ([#74835](https://github.com/kubernetes/kubernetes/pull/74835), [@davidz627](https://github.com/davidz627))

* Allow remote admission controllers to be dynamically added and removed by administrators.  External admission controllers make an HTTP POST containing details of the requested action which the service can approve or reject. ([#46388](https://github.com/kubernetes/kubernetes/pull/46388), [@lavalamp](https://github.com/lavalamp))

- Kubeadm: ensure `image-pull-timeout` flag is respected during upgrade phase ([#90328](https://github.com/kubernetes/kubernetes/pull/90328), [@SataQiu](https://github.com/SataQiu)) [SIG Cluster Lifecycle]
- Kubeadm: fix a bug where post upgrade to 1.18.x, nodes cannot join the cluster due to missing RBAC ([#89537](https://github.com/kubernetes/kubernetes/pull/89537), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]