* The kube-apiserver has improved behavior for both startup and shutdown sequences and also now exposes `/readyz` for readiness checking. Readyz includes all existing healthz checks but also adds a shutdown check. When a cluster admin initiates a shutdown, the kube-apiserver will try to process existing requests (for the duration of request timeout) before killing the apiserver process.   ([#78458](https://...

                """
            ),
        ] = None,
        on_shutdown: Annotated[
            Optional[Sequence[Callable[[], Any]]],
            Doc(
                """
                A list of shutdown event handler functions.

                You should instead use the `lifespan` handlers.

                Read more in the
                [FastAPI docs for `lifespan`](https://fastapi.tiangolo.com/advanced/events/).

- Reverts graceful node shutdown to match 1.21 behavior of setting pods that have not yet successfully completed to "Failed" phase if the GracefulNodeShutdown feature is enabled in kubelet. The GracefulNodeShutdown feature is beta and must be explicitly configured via kubelet config to be enabled in 1.21+. This changes 1.22 and 1.23 behavior on node shutdown to match 1.21. If you do not want pods to be marked terminated on node shutdown in...

    connection.withLock {
      if (!connection.isHealthy(System.nanoTime())) {
        throw ConnectionShutdownException()
      }
    }
    connection.writePing()
    connection.shutdown(ErrorCode.PROTOCOL_ERROR)
    assertThat(connection.openStreamCount()).isEqualTo(1)
    connection.awaitPong() // Prevent the peer from exiting prematurely.

    // Verify the peer received what was expected.

- Reverted graceful node shutdown to match 1.21 behavior of setting pods that have not yet successfully completed to "Failed" phase if the GracefulNodeShutdown feature is enabled in kubelet. The GracefulNodeShutdown feature is beta and must be explicitly configured via kubelet config to be enabled in 1.21+. This changes 1.22 and 1.23 behavior on node shutdown to match 1.21. If you do not want pods to be marked terminated on node shutdown in...

is now easier to integrate into custom networking environments by supporting
TLS for secure communication and L7 http-based traffic routing.
     * Graceful Node Shutdown (aka drain) - The new “kubectl drain” command gracefully
evicts pods from nodes in preparation for disruptive operations like kernel
upgrades or maintenance.

    )
    val call = client.newCall(Request(server.url("/")))
    val response = call.execute()
    assertThat(response.header("a\tb")).isEqualTo("c")
  }

  @Test
  fun connectFails() {
    server.shutdown()
    executeSynchronously("/")
      .assertFailure(IOException::class.java)
  }

  @Test
  fun requestBodySurvivesRetries() {
    server.enqueue(MockResponse())

### Introducing Graceful Node Shutdown (Alpha)

The `GracefulNodeShutdown` feature is now in Alpha. This allows kubelet to be aware of node system shutdowns, enabling graceful termination of pods during a system shutdown. This feature can be [enabled through feature gate](https://docs.k8s.io/concepts/architecture/nodes/#graceful-node-shutdown).

### Runtime log sanitation

### SIG OpenStack

- Openstack now supports the node shutdown taint. The taint is added when an instance is shutdown in openstack. ([#67982](https://github.com/kubernetes/kubernetes/pull/67982), [@zetaab](https://github.com/zetaab))

### SIG Scheduling

#### **Audit**

*   Fixed a bug so that `kube-apiserver` now waits for open connections to finish before exiting. This fix provides graceful shutdown and ensures that the audit backend no longer drops events on shutdown. ([#53695](https://github.com/kubernetes/kubernetes/pull/53695),[ @hzxuzhonghu](https://github.com/hzxuzhonghu))