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
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>.
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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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.
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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
```
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>.
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>
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>.
Remove unused variables and constant from pkg/apis/componentconfig/v1…
…alpha1/defaults.go
This commit will remove variables `zeroDuration`, `defaultNodeAllocatableEnforcement` and
constants `defaultIPTablesMasqueradeBit` and `defaultIPTablesDropBit` as they are unused.
```release-note
NONE
```
Fix#18155
Make HPA tolerance configurable as a flag. This change allows us to use
different tolerance values in production/testing.
Signed-off-by: mattjmcnaughton <mattjmcnaughton@gmail.com>
Automatic merge from submit-queue (batch tested with PRs 52485, 52443, 52597, 52450, 51971). 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>..
Some kubelet flags do not accept their default values
Correct the flags and add a round trip test that ensure these do not
break again in the future.
@deads2k as observed when we tried to turn flags into args.
This commit will remove variables `zeroDuration`, `defaultNodeAllocatableEnforcement` and
constants `defaultIPTablesMasqueradeBit` and `defaultIPTablesDropBit` as they are unused.
Automatic merge from submit-queue (batch tested with PRs 47896, 50678, 50620, 50631, 51005)
Remove deprecated lookup cache flags.
**What this PR does / why we need it**:
Remove deprecated lookup cache flags: `replication-controller-lookup-cache-size, replicaset-lookup-cache-size, daemonset-lookup-cache-size`
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#43388
**Special notes for your reviewer**:
/cc @enisoc
**Release note**:
```release-note
The following deprecated flags have been removed from `kube-controller-manager`: `replication-controller-lookup-cache-size`, `replicaset-lookup-cache-size`, and `daemonset-lookup-cache-size`. Make sure you no longer attempt to set them.
```
Automatic merge from submit-queue (batch tested with PRs 50119, 48366, 47181, 41611, 49547)
Fail on swap enabled and deprecate experimental-fail-swap-on flag
**What this PR does / why we need it**:
* Deprecate the old experimental-fail-swap-on
* Add a new flag fail-swap-on and set it to true
Before this change, we would not fail when swap is on. With this
change we fail for everyone when swap is on, unless they explicitly
set --fail-swap-on to false.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
Fixes#34726
**Special notes for your reviewer**:
**Release note**:
```release-note
Kubelet will by default fail with swap enabled from now on. The experimental flag "--experimental-fail-swap-on" has been deprecated, please set the new "--fail-swap-on" flag to false if you wish to run with /proc/swaps on.
```
* Deprecate the old experimental-fail-swap-on
* Add a new flag fail-swap-on and set it to true
Before this change, we would not fail when swap is on. With this
change we fail for everyone when swap is on, unless they explicitly
set --fail-swap-on to false.
Automatic merge from submit-queue (batch tested with PRs 48481, 48256)
Refactor: pkg/util into sub-pkgs
**What this PR does / why we need it**:
- move code in pkg/util into sub-pkgs
- delete some unused funcs
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#15634
**Special notes for your reviewer**:
This is the final work of #15634. It will close that issue.
/cc @thockin
**Release note**:
```release-note
NONE
```
