- kubeadm: removed the deprecated sub-phase of 'init kubelet-finilize' called `experimental-cert-rotation`, and use 'enable-client-cert-rotation' instead. ([#126913](https://github.com/kubernetes/kubernetes/pull/126913), [@pacoxu](https://github.com/pacoxu)) [SIG Cluster Lifecycle]

cfa
cfd
cfolks.pl
cg
ch
ch.eu.org
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chambagri.fr
championship.aero
chanel
channel
channelsdvr.net
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- 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))

    )
    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=")

- 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))

- 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]

over; and the moment she appeared on the other side, the puppy
made another rush at the stick, and tumbled head over heels in
its hurry to get hold of it; then Alice, thinking it was very
like having a game of play with a cart-horse, and expecting every
moment to be trampled under its feet, ran round the thistle
again; then the puppy began a series of short charges at the
stick, running a very little way forwards each time and a long

  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))

- Kubeadm: changed the "system:masters" Group in the apiserver-kubelet-client.crt certificate Subject to be "kubeadm:cluster-admins" which is a less privileged Group. ([#121837](https://github.com/kubernetes/kubernetes/pull/121837), [@neolit123](https://github.com/neolit123))