- The flag `--experimental-control-plane` is now deprecated in favor of  `--control-plane`. The flag `--experimental-upload-certs` is now deprecated in favor of `--upload-certs` ([#78452](https://github.com/kubernetes/kubernetes/pull/78452), [@fabriziopandini](https://github.com/fabriziopandini))

- Added option to create CSRs instead of certificates for kubeadm init phase certs and kubeadm alpha certs renew ([#70809](https://github.com/kubernetes/kubernetes/pull/70809), [@liztio](https://github.com/liztio))

    this one.
 *  New: Include suppressed exceptions when all routes to a target service fail.


## Version 4.4.1

_2020-03-08_

 *  Fix: Don't reuse a connection on redirect if certs match but DNS does not. For better
    locality and performance OkHttp attempts to use the same pooled connection across redirects and
    follow-ups. It independently shares connections when the IP addresses and certificates match,

  in kube-apisever and kube-controller-manager pods. Instead, it shifted to supporting the
  mounting of /etc/pki/ca-trust and /etc/pki/tls/certs. The locations /etc/ca-certificate,
  /usr/share/ca-certificates, /usr/local/share/ca-certificates, and /etc/ssl/certs continued
  to be supported. ([#124361](https://github.com/kubernetes/kubernetes/pull/124361), [@neolit123](https://github.com/neolit123))

      list(certB, certA, trusted, selfSigned),
    )
    assertThat(cleaner.clean(list(certB, certA, trusted), "hostname")).isEqualTo(
      list(certB, certA, trusted, selfSigned),
    )
    assertThat(cleaner.clean(list(certB, certA, trusted, selfSigned), "hostname"))
      .isEqualTo(
        list(certB, certA, trusted, selfSigned),
      )
  }

  @Test
  fun trustedRootNotSelfSigned() {

  certificate. ([#120521](https://github.com/kubernetes/kubernetes/pull/120521), [@SataQiu](https://github.com/SataQiu))
- `kubeadm`: removed leftover disclaimer that could be seen in the `kubeadm init phase certs` command help screen, since the "certs" phase of "init" is no longer alpha. ([#121172](https://github.com/kubernetes/kubernetes/pull/121172), [@SataQiu](https://github.com/SataQiu))

- Kubeadm: graduate the "kubeadm alpha certs" command to a parent command "kubeadm certs". The command "kubeadm alpha certs" is deprecated and will be removed in a future release. Please migrate. ([#94938](https://github.com/kubernetes/kubernetes/pull/94938), [@yagonobre](https://github.com/yagonobre)) [SIG Cluster Lifecycle]

- Update Azure load balancer to prevent orphaned public IP addresses ([#82890](https://github.com/kubernetes/kubernetes/pull/82890), [@chewong](https://github.com/chewong))
### Cluster Lifecycle
- Kubeadm alpha certs command now skip missing files ([#85092](https://github.com/kubernetes/kubernetes/pull/85092), [@fabriziopandini](https://github.com/fabriziopandini))

tes/pull/57902), [@kawych](https://github.com/kawych))

* On cluster provision or upgrade, kubeadm now generates certs and secures all connections to the etcd static-pod with mTLS. This includes the etcd serving cert, the etcd peer cert, and the apiserver etcd client cert. Flags and hostMounts are added to the etcd and apiserver static-pods to load these certs. For connections to etcd, https is now used in favor of http. ([#57415](https://github.com/kubernetes/kubernetes/pull/57415),...

    * Add registry action to the kubernetes-worker charm

    * Add support for kube-proxy cluster-cidr option to kubernetes-worker charm

    * Fix kubernetes-master charm starting services before TLS certs are saved

    * Fix kubernetes-worker charm failures in LXD

    * Fix stop hook failure on kubernetes-worker charm

    * Fix handling of juju kubernetes-worker.restart-needed state