## Changes by Kind

### Deprecation

- 'kubeadm: marked the sub-phase of ''init kubelet-finilize'' called ''experimental-cert-rotation''
  as deprecated and print a warning if it is used directly; it will be removed in
  a future release. Add a replacement sub-phase ''enable-client-cert-rotation''.' ([#124419](https://github.com/kubernetes/kubernetes/pull/124419), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]

    )
    response2.body.close()
  }

  @Test
  fun unmatchingPinnedCertificate() {
    enableTls()
    server.enqueue(MockResponse())

    // Pin publicobject.com's cert.
    client =
      client.newBuilder()
        .certificatePinner(
          CertificatePinner.Builder()
            .add(server.hostName, "sha1/DmxUShsZuNiqPQsX2Oi9uv2sCnw=")
            .build(),

- kubeadm still generates RSA keys when deploying a node, but also accepts ECDSA
keys if they already exist in the directory specified in the `--cert-dir` option. ([#76390](https://github.com/kubernetes/kubernetes/pull/76390), [@rojkov](https://github.com/rojkov))

- The `kubelet` now reports distinguishes log messages about certificate rotation for its client cert and server cert separately to make debugging problems with one or the other easier. ([#101252](https://github.com/kubernetes/kubernetes/pull/101252), [@smarterclayton](https://github.com/smarterclayton))

- The kube-controller-manager managed signers can now have distinct signing certificates and keys.  See the help about `--cluster-signing-[signer-name]-{cert,key}-file`.  `--cluster-signing-{cert,key}-file` is still the default. ([#90822](https://github.com/kubernetes/kubernetes/pull/90822), [@deads2k](https://github.com/deads2k)) [SIG API Machinery, Apps and Auth]

- kubeadm: added back `--cert-dir` option for `kubeadm init phase certs sa` ([#73239](https://github.com/kubernetes/kubernetes/pull/73239), [@mattkelly](https://github.com/mattkelly))

  Beta feature in 1.27. ([#114445](https://github.com/kubernetes/kubernetes/pull/114445), [@mengjiao-liu](https://github.com/mengjiao-liu))
- `Secret` of `kubernetes.io/tls` type now verifies that the private key matches the cert ([#113581](https://github.com/kubernetes/kubernetes/pull/113581), [@aimuz](https://github.com/aimuz))

// Reference: 264afe70-f62c-4c02-8ab9-b5281ed24461
eero.online
eero-stage.online

// concludes Amazon

// Amune : https://amune.org/
// Submitted by Team Amune <cert@amune.org>
t3l3p0rt.net
tele.amune.org

// Apigee : https://apigee.com/
// Submitted by Apigee Security Team <******@****.***>
apigee.io

// Apphud : https://apphud.com

- The commands `kubeadm certs renew` and `kubeadm certs check-expiration` now honor the `cert-dir` flag on a running Kubernetes cluster. ([#110709](https://github.com/kubernetes/kubernetes/pull/110709), [@chendave](https://github.com/chendave))

- Kubeadm: tried to load CA cert from external CertificateAuthority file when CertificateAuthorityData is empty for existing kubeconfig. ([#111783](https://github.com/kubernetes/kubernetes/pull/111783), [@SataQiu](https://github.com/SataQiu))