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Workloads V1
**What this PR does / why we need it**: This PR promotes the Deployment, ReplicaSet, and DaemonSet StatefulSet, ControllerRevision kinds to the apps/v1 group version.
https://github.com/kubernetes/features/issues/353
**Special notes for your reviewer**:
There will be at least two followups to this PR. The first to add a scale sub-resource when the correct location is resolved, and the second to deal with Conditions in the workloads API.
While it would have been preferable to move the kinds individually providing a lesser burden on reviewers, this proved impracticable due to the intricacies of version resolution in kubectl for objects of the different kinds in the same group.
```release-note
DaemonSet, Deployment, ReplicaSet, and StatefulSet have been promoted to GA and are available in the apps/v1 group version.
```
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Update deletionTimestamp with information about finalizer effect
**What this PR does / why we need it**:
ref https://github.com/kubernetes/community/pull/1177
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:Fixes # https://github.com/kubernetes/website/issues/6128
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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output empty creationTimestamp as null
**Release note**
```release-note
NONE
```
Updates the value of the `creationTimestamp` field to be `null`
when empty, to keep parity between it and `deletionTimestamp`.
Adds a round-trip test to ensure that unstructured objects containing
empty metadata fields are able to be re-converted back into internal
or external objects. Prior to the proposed patch in this PR, an
unstructured object whose `.metadata.creationTimestamp` value had
been set through the metadata accessor to an empty value
(`metav1.Time{}` in this case), was unable to be re-converted to an
internal or external type using the runtime decoder. Conversion would
fail with the error:
```
unstructured_test.go:177: FromUnstructured failed: parsing time "" as "2006-01-02T15:04:05Z07:00": cannot parse "" as "2006"
```
cc @liggitt @fabianofranz
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refactor admission handler and add UT
**What this PR does / why we need it**:
remove Redundant code, and add UT case.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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extensions: remove TPR remnants
The extensions group still had the TPR types + generated client. Having this in the codebase doesn't create any problems but would be good to clean up, especially since TPR access has been removed in 1.8.
**Release note**:
```release-note
NONE
```
/assign @sttts @deads2k
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conversion-gen: cut off kube dependencies in extra-peer-dirs
Fixes#54301
This makes conversion-gen usable in a context without a vendored k8s.io/kubernetes.
```release-note
In conversion-gen removed Kubernetes core API from default extra-peer-dirs.
```
apps/v1betaX inadventertently contains its own variant of Scale. In
order to support scaling Deployments, ReplicaSets, etc, we need to support
these versions of Scale as well.
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Lift embedded structure out of ManifestURLHeader field
Related: #53833
```release-note
It is now possible to set multiple manifest url headers via the Kubelet's --manifest-url-header flag. Multiple headers for the same key will be added in the order provided. The ManifestURLHeader field in KubeletConfiguration object (kubeletconfig/v1alpha1) is now a map[string][]string, which facilitates writing JSON and YAML files.
```
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Update kube-openapi to use validation
**What this PR does / why we need it**: Moves openapi validation code to kube-openapi, so that we can move the rest of the code to apimachinery repository, so that later we can use it from both the client and the server.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #Nothing
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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admission: wire through validating-only admission
Based on https://github.com/kubernetes/kubernetes/pull/54232.
This is important and required for beta because it affects the shape of the webhook admission plugins that are going to be produced and is needed to make sure that our existing chain continues to properly verify and protect the API objects based on their final state after webhook admission mutators run.
We discussed this in the October 11 API machinery call with @erictune and @caesarxuchao and we agreed to do this as a requirement for beta. See this part of the recording: https://www.youtube.com/watch?v=mrgDPHyr4VY#t=325 .
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Fix error for strategic merge patch of custom resources
Fixes#50037.
We need the go struct tags `patchMergeKey` and `patchStrategy` for fields that support a strategic merge patch. For native resources, we can easily figure out these tags since we know the fields.
Because custom resources are decoded as Unstructured and because we're missing the metadata about how to handle each field in a strategic merge patch, we can't find the go struct tags. Hence, we can't easily do a strategic merge for custom resources.
So we should fail fast and return an error.
**Release note**:
```release-note
NONE
```
/cc @sttts @deads2k @ncdc
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rename metric reflector_xx_last_resource_version
**What this PR does / why we need it**:
mv reflector name from metric name to metric label
before:
```
reflector_k8s_io_kubernetes_pkg_client_informers_informers_generated_internalversion_factory_go:73_8664_last_resource_version{instance="104.154.20.21:443",job="kubernetes-apiservers"}
```
after
```
reflector_last_resource_version{instance="10.0.2.15:6443",job="kubernetes-apiservers",name="k8s_io_kubernetes_pkg_client_informers_informers_generated_internalversion_factory_go_73_8664"}
```
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes#52121
**Special notes for your reviewer**:
None
**Release note**:
```release-note
NONE
```
Automatic merge from submit-queue (batch tested with PRs 54800, 53898, 54812, 54921, 53558). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
NewProxierWithNoProxyCIDR: fix handling IPv6 URLs
**What this PR does / why we need it**:
Current logic of splitting hostname from URL does not work if URL
is for IPv6 address and does not explicitly specify port number.
Example: "https://[2001:db8::1]/".
Use standard library function to get hostname out of URL string.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*:
**Special notes for your reviewer**:
**Release note**:
```release-note
- Fix handling of IPv6 URLs in NO_PROXY.
```
/area ipv6
/sig api-machinery
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Improve deleteOptions doc
**What this PR does / why we need it**:
This PR improves the doc of the 'PropagationPolicy' property of the DeleteOptions struct.
The said field is a string. It is very important a field for people who invoke a delete API.
For example, direct invocation of the deployment-delete API using the python client will have the replicaset and pods left behind. However, this field was not well documented. When people wanted to try different options, they have to dig into k8s source code to find out the acceptable values.
**Which issue this PR fixes**: fixes #
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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Useful helper functions for Unstructured
**Which issue this PR fixes**:
Fixes#40790
**Release note**:
```release-note
NONE
```
/kind feature
/sig api-machinery
/area client-libraries
/assign @sttts @liggitt
