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Improve cronjob concurrency policy doc
**What this PR does / why we need it**:
The CronJob API documentation (https://kubernetes.io/docs/api-reference/v1.8/#cronjobspec-v1beta1-batch) did not clearly state what can be used as `concurrencyPolicy`. Instead, it only says that the default value is "Raw".
**Which issue(s) this PR fixes**:
**Special notes for your reviewer**:
This patch is not changing any code logic but it involves generated "code".
**Release note**:
```release-note
NONE
```
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Refactor kube-scheduler config API, command, and server setup
Refactor the kube-scheduler configuration API, command setup, and server setup according to the guidelines established in #32215 and using the kube-proxy refactor (#34727) as a model of a well factored component adhering to said guidelines.
* Config API: clarify meaning and use of algorithm source by replacing modality derived from bools and string emptiness checks with an explicit AlgorithmSource type hierarchy.
* Config API: consolidate client connection config with common structs.
* Config API: split and simplify healthz/metrics server configuration.
* Config API: clarify leader election configuration.
* Config API: improve defaulting.
* CLI: deprecate all flags except `--config`.
* CLI: port all flags to new config API.
* CLI: refactor to match kube-proxy Cobra command style.
* Server: refactor away configurator.go to clarify application wiring.
* Server: refactor to more clearly separate wiring/setup from running.
Fixes https://github.com/kubernetes/kubernetes/issues/52428.
@kubernetes/api-reviewers
@kubernetes/sig-cluster-lifecycle-pr-reviews
@kubernetes/sig-scheduling-pr-reviews
/cc @ncdc @timothysc @bsalamat
```release-note
The kube-scheduler command now supports a `--config` flag which is the location of a file containing a serialized scheduler configuration. Most other kube-scheduler flags are now deprecated.
```
Refactor the kube-scheduler configuration API, command setup, and server
setup according to the guidelines established in #32215 and using the
kube-proxy refactor (#34727) as a model of a well factored component
adhering to said guidelines.
* Config API: clarify meaning and use of algorithm source by replacing
modality derived from bools and string emptiness checks with an explicit
AlgorithmSource type hierarchy.
* Config API: consolidate client connection config with common structs.
* Config API: split and simplify healthz/metrics server configuration.
* Config API: clarify leader election configuration.
* Config API: improve defaulting.
* CLI: deprecate all flags except `--config`.
* CLI: port all flags to new config API.
* CLI: refactor to match kube-proxy Cobra command style.
* Server: refactor away configurator.go to clarify application wiring.
* Server: refactor to more clearly separate wiring/setup from running.
Fixes#52428.
Automatic merge from submit-queue (batch tested with PRs 53866, 54852, 55178, 55185, 55130). 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>.
Remove duplicated Hairpin constant definition
**What this PR does / why we need it**:
Clean up the hairpin definition in conponent config since it has been remove to [kubelet config](https://github.com/kubernetes/kubernetes/blob/master/pkg/kubelet/apis/kubeletconfig/types.go#L36)
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
no issue, just clean up the code
**Special notes for your reviewer**:
none
**Release note**:
none
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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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validate ipvs scheduler
**What this PR does / why we need it**:
validate ipvs scheduler options
**Which issue this PR fixes**:
closes#53975
**Special notes for your reviewer**:
It depends on work of #53780.
**Release note**:
```release-note
NONE
```
/sig network
/area kube-proxy
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Update many misspelled word initializer
**What this PR does / why we need it**:
fix misspelled word initalizer
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
**Special notes for your reviewer**:
**Release note**:
``` NONE
```
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Fix broken links in api after moving proposals to subdirs
**What this PR does / why we need it**:
fix incorrect links in api after kubernetes/community#1010
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes kubernetes/community#918
**Special notes for your reviewer**:
CC @bgrant0607
**Release note**:
```
NONE
```
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Polymorphic Scale Client
This PR introduces a polymorphic scale client based on discovery information that's able to scale scalable resources in arbitrary group-versions, as long as they present the scale subresource in their discovery information.
Currently, it supports `extensions/v1beta1.Scale` and `autoscaling/v1.Scale`, but supporting other versions of scale if/when we produce them should be fairly trivial.
It also updates the HPA to use this client, meaning the HPA will now work on any scalable resource, not just things in the `extensions/v1beta1` API group.
**Release note**:
```release-note
Introduces a polymorphic scale client, allowing HorizontalPodAutoscalers to properly function on scalable resources in any API group.
```
Unblocks #29698
Unblocks #38756
Unblocks #49504Fixes#38810
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clean up pkg/apis/meta/v1/time.go
This file has been moved to staging/src/k8s.io/apimachinery/pkg/apis/meta/v1/time.go
**Release note**:
```
NONE
```
/assign @sttts
This updates the HPA controller to use the polymorphic scale client from
client-go. This should enable HPAs to work with arbitrary scalable
resources, instead of just those in the extensions API group (meaning we
can deprecate the copy of ReplicationController in extensions/v1beta1).
It also means that the HPA controller now pays attention to the
APIVersion field in `scaleTargetRef` (more specifically, the group part
of it).
Note that currently, discovery information on which resources are
available where is only fetched once (the first time that it's
requested). In the future, we may want a refreshing discovery REST
mapper.
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allow fail close webhook admission
Webhook admission needs to allow failing closed. Even in an alpha state, I don't want to be one DDOS away from having an exposed cluster.
/assign caesarxuchao
/assign sttts
Automatic merge from submit-queue. 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>.
allow */subresource in rbac policy rules
xref #29698
xref #38756
xref #49504
xref #38810
Allow `*/subresource` format in RBAC policy rules to support polymorphic subresources like `*/scale` for HPA.
@DirectXMan12 fyi
```release-note
RBAC PolicyRules now allow resource=`*/<subresource>` to cover `any-resource/<subresource>`. For example, `*/scale` covers `replicationcontroller/scale`.
```
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pkg/api: extract Scheme/Registry/Codecs into pkg/api/legacyscheme
This serves as
- a preparation for the pkg/api->pkg/apis/core move
- and makes the dependency to the scheme explicit when vizualizing
left depenncies.
The later helps with our our efforts to split up the monolithic repo
into self-contained sub-repos, e.g. for kubectl, controller-manager
and kube-apiserver in the future.
Automatic merge from submit-queue (batch tested with PRs 51416, 53535). 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>.
PodSecurityPolicy: teach fuzzer about fsGroup/supplementalGroups strategies
**What this PR does / why we need it**:
At present, fuzzer for PSP doesn't take into account `fsGroup`/`supplementalGroups` strategies. This PR teach fuzzer about these strategies in order to have ability to catch more possible errors.
**Special notes for your reviewer**:
Let me know if you think that we need to cover more (all?) fields in the PSP.
**Release note**:
```release-note
NONE
```
PTAL @pweil- @sttts
CC @simo5
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fix typos: remove duplicated word in comments
**What this PR does / why we need it**: Remove the duplicated word `the` in comments
**Which issue this PR fixes** : fixes #
**Special notes for your reviewer**:
```release-note
NONE
```
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Make HPA tolerance a flag
**What this PR does / why we need it**:
Make HPA tolerance configurable as a flag. This change allows us to use
different tolerance values in production/testing.
**Which issue this PR fixes**:
Fixes#18155
**Release note:**
```release-note
Control HPA tolerance through the `horizontal-pod-autoscaler-tolerance` flag.
```
Signed-off-by: mattjmcnaughton <mattjmcnaughton@gmail.com>
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Update rules_go, repo-infra, and rules_docker dependencies
**What this PR does / why we need it**: several of our bazel dependencies were getting pretty old, since they required bazel 0.5.4+ but there were various failures if we tried to use them with bazel 0.5.4.
Now that bazel 0.6.0 (and 0.6.1) have been out for a while, we can bump our dependencies and get a number of fixes and new functionality.
x-ref #52677 and others
**Special notes for your reviewer**:
* This will now explicitly require bazel 0.6.0+ to build kubernetes.
* Our staging directories are causing some issues for `gazelle`; it wants to set `importpath = "k8s.io/kubernetes/staging/src/k8s.io/blah"` instead of `importpath = "k8s.io/blah"`. I'm not sure what is the correct way to fix this; what we're doing here is pretty weird and nonstandard. I've used a `sed` substitution for now.
* The `-proto=default` option of `gazelle` has a number of bugs right now (https://github.com/bazelbuild/rules_go/issues/888, https://github.com/bazelbuild/rules_go/issues/900, https://github.com/bazelbuild/rules_go/issues/907), so I am forcing the legacy behavior.
**Release note**:
```release-note
NONE
```
/assign @mikedanese @spxtr @BenTheElder
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remove redundant error test case in autoscaling validation
Signed-off-by: allencloud <allen.sun@daocloud.io>
**What this PR does / why we need it**:
I think the error test case I removed is the same as https://github.com/kubernetes/kubernetes/blob/master/pkg/apis/autoscaling/validation/validation_test.go#L393-L412 .
So maybe removal of this part is proper, since it would reduce the codes and save a little bit time in testing.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
NONE
**Special notes for your reviewer**:
NONE
**Release note**:
```release-note
NONE
```
