- To address the possibility of dry-run requests overwhelming admission webhooks that rely on side effects and a reconciliation mechanism, a new field is being added to `admissionregistration.k8s.io/v1beta1.ValidatingWebhookConfiguration` and `admissionregistration.k8s.io/v1beta1.MutatingWebhookConfiguration` so that webhooks can explicitly register as having dry-run support. If a dry-run request is made on a resource that triggers a non dry-run supporting...

#### kubectl:
- the boolean and unset values for the --dry-run flag are deprecated and a value --dry-run=server|client|none will be required in a future version. ([#87580](https://github.com/kubernetes/kubernetes/pull/87580), [@julianvmodesto](https://github.com/julianvmodesto)) [SIG CLI]

1. Create the `WATCH_NAMESPACE` and `LEADER_ELECTION_NAMESPACE` if they are not created yet.

```bash
kubectl create ns $WATCH_NAMESPACE --dry-run -o yaml | kubectl apply -f -
kubectl create ns $LEADER_ELECTION_NAMESPACE --dry-run -o yaml | kubectl apply -f -
```

1. From the istio repo root directory, run `go run ./operator/cmd/operator/*.go server`

them, called out, `Sit down, all of you, and listen to me!  I'LL
soon make you dry enough!'  They all sat down at once, in a large
ring, with the Mouse in the middle.  Alice kept her eyes
anxiously fixed on it, for she felt sure she would catch a bad
cold if she did not get dry very soon.

  `Ahem!' said the Mouse with an important air, `are you all ready?

            }

            localGradle {
                name = "QUICKCHECK_WITH_GRADLE_BUILT_BY_GRADLE"
                tasks = "clean sanityCheck test -PflakyTests=exclude " + if (bundleGroovy4) "--dry-run" else ""
                gradleHome = "%teamcity.build.checkoutDir%/dogfood-second"
                gradleParams = defaultParameters
            }
        }
    )
})

  // persisted. An invalid or unrecognized dryRun directive will
  // result in an error response and no further processing of the
  // request. Valid values are:
  // - All: all dry run stages will be processed
  // +optional
  repeated string dryRun = 1;

  // Force is going to "force" Apply requests. It means user will
  // re-acquire conflicting fields owned by other people.

* - kubeadm now supports "ci/latest-1.8" or "ci-cross/latest-1.8" and similar labels. ([#49119](https://github.com/kubernetes/kubernetes/pull/49119), [@kad](https://github.com/kad))
* kubeadm: Adds dry-run support for kubeadm using the `--dry-run` option ([#50631](https://github.com/kubernetes/kubernetes/pull/50631), [@luxas](https://github.com/luxas))

- Kubeadm: now supports image repository format validation. ([#112732](https://github.com/kubernetes/kubernetes/pull/112732), [@SataQiu](https://github.com/SataQiu))
- Kubeadm: sub-phases are now able to support the dry-run mode, e.g. kubeadm reset phase cleanup-node --dry-run ([#112945](https://github.com/kubernetes/kubernetes/pull/112945), [@chendave](https://github.com/chendave)) [SIG Cluster Lifecycle]

them, called out, `Sit down, all of you, and listen to me!  I'LL
soon make you dry enough!'  They all sat down at once, in a large
ring, with the Mouse in the middle.  Alice kept her eyes
anxiously fixed on it, for she felt sure she would catch a bad
cold if she did not get dry very soon.

  `Ahem!' said the Mouse with an important air, `are you all ready?

- Fixed a bug where dry-run is not honored for pod/eviction sub-resource. ([#76969](https://github.com/kubernetes/kubernetes/pull/76969), [@apelisse](https://github.com/apelisse))