resource limits are satisfied by the input node's allocatable resources or not.
If yes, the node is assigned a score of 1, otherwise the node's score is not changed.
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Add PodDisruptionBudget support in pod preemption
**What this PR does / why we need it**:
This PR adds the logic to make scheduler preemption aware of PodDisruptionBudget. Preemption tries to avoid preempting pods whose PDBs are violated by preemption. If preemption does not find any other pods to preempt, it will preempt pods despite violating their PDBs.
**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#53913
**Special notes for your reviewer**:
**Release note**:
```release-note
Add PodDisruptionBudget support during pod preemption
```
ref/ #47604
/sig scheduling
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fixtypo
**What this PR does / why we need it**:
fixtypo
**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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Topology aware volume scheduler and PV controller changes
**What this PR does / why we need it**:
Scheduler and PV controller changes to support volume topology aware scheduling, as specified in kubernetes/community#1168
**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#54435
**Special notes for your reviewer**:
* I've split the PR into logical commits to make it easier to review
* The remaining TODOs I plan to address next release unless you think it needs to be done now
**Release note**:
```release-note
Adds alpha support for volume scheduling, which allows the scheduler to make PersistentVolume binding decisions while respecting the Pod's scheduling requirements. Dynamic provisioning is not supported with this feature yet.
Action required for existing users of the LocalPersistentVolumes alpha feature:
* The VolumeScheduling feature gate also has to be enabled on kube-scheduler and kube-controller-manager.
* The NoVolumeNodeConflict predicate has been removed. For non-default schedulers, update your scheduler policy.
* The CheckVolumeBinding predicate has to be enabled in non-default schedulers.
```
@kubernetes/sig-storage-pr-reviews @kubernetes/sig-scheduling-pr-reviews
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Removed opaque integer resources (deprecated in v1.8)
**What this PR does / why we need it**:
* Remove opaque integer resources (OIR) support from the code base. This feature was deprecated in v1.8 and replaced by Extended Resources (ER).
**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#55102
**Release note**:
```release-note
Remove opaque integer resources (OIR) support (deprecated in v1.8.)
```
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Suppress the warning when a pod in binding cannot be expired
**What this PR does / why we need it**:
I have a scheduler extender, which implements the `Bind` call and takes several minutes to respond to that call. The scheduler log was full of the following error.
```
W1120 10:23:09.691188 99720 cache.go:442] Couldn't expire cache for pod default/xxx. Binding is still in progress.
```
The TTL for a pod to be expired in the scheduler cache is 30 seconds. But it's also possible that the binding (which is done asynchronously) can take longer than 30 seconds.
2cbb07a439/plugin/pkg/scheduler/factory/factory.go (L143)
The go routine that checks whether a pod has been expired is triggered every second.
2cbb07a439/plugin/pkg/scheduler/schedulercache/cache.go (L33)
So, it will print the the following warning every seconds until the pod gets expired.
2cbb07a439/plugin/pkg/scheduler/schedulercache/cache.go (L442-L443)
I think it's a valid for the binding to take more than one second, so we should downgrade this to an info to avoid polluting the scheduler log.
**Release note**:
```release-note
None
```
/sig scheduling
/assign @bsalamat
/cc @vishh
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Add support to take nominated pods into account during scheduling to avoid starvation of higher priority pods
**What this PR does / why we need it**:
When a pod preempts lower priority pods, the preemptor gets a "nominated node name" annotation. We call such a pod a nominated pod. This PR adds the logic to take such nominated pods into account when scheduling other pods on the same node that the nominated pod is expected to run. This is needed to avoid starvation of preemptor pods. Otherwise, lower priority pods may fill up the space freed after preemption before the preemptor gets a chance to get scheduled.
**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#54501
**Special notes for your reviewer**: This PR is built on top of #55109 and includes all the changes there as well.
**Release note**:
```release-note
Add support to take nominated pods into account during scheduling to avoid starvation of higher priority pods.
```
/sig scheduling
ref/ #47604
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Move of unreachable taint key out of alpha
**What this PR does / why we need it**:
Move of unreachable taint key out of alpha, which already happened in community doc.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#54198
**Special notes for your reviewer**:
Please see #54198 for the context of this inconsistency.
**Release note**:
```release-note
Move unreachable taint key out of alpha.
Please note the existing pods with the alpha toleration should be updated by user himself to tolerate the GA taint.
```
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Refactoring of priority function(CaculateSpreadPriority) by using map/reduce pattern
**What this PR does / why we need it**:
Ref #24246. exactly ref https://github.com/kubernetes/kubernetes/issues/51455, the PR aim to unify priority functions(deprecated) by using map/reduce pattern.
This is the first step, my todo list(WIP):
- interpod-affnity priority funciton refactoring
- the priority funcitons register pattern
- deprecated priority function definition and all related logic. etc.
**Which issue this PR fixes**:
no issue, just unify the priority functions pattern.
**Special notes for your reviewer**:
none
**Release note**:
none
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Refactor Priority Reduce functions
- Reducing the duplicated reduce function by introducing a reduce
function generator that generates common reduce functions.
- Remove logs from reduce function, so it's purely calculating scores.
- Optimize the reduce functions by removing unnecessary conversion to
float64.
**Release note**:
```release-note
None
```
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Adding unit tests to methods of 'scheduler/algorithm/priorities/util'
What this PR does / why we need it:
1) Adding unit tests to methods of 'non_zero.go'
2) Adding unit tests to methods of 'util.go'
3) Adding/Modifing unit tests to methods of 'topologies.go'
thank you!
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add hostip and protocol to the hostport predicates
**What this PR does / why we need it**:
This PR adds "hostIP and protocol" to scheduler hostport predicate procedure
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
fix#51950
**Special notes for your reviewer**:
- [x] basic implementation, need review
- [x] e2e test
- [x] update doc (will be done in seperate PR)
**Release note**:
```release-note
add hostIP and protocol to the original hostport predicates procedure in scheduler.
```
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Add test case in metadata_test.go
**What this PR does / why we need it**:
Add test case in metadata_test.go
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#55567
**Release note**:
```release-note
NONE
```
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Fix divide by zero issue in calculating spread priority for zones
```release-note
NONE
```
- Reducing the duplicated reduce function by introducing a reduce
function generator that generates common reduce functions.
- Remove logs from reduce function, so it's purely calculating scores.
- Optimize the reduce functions by removing unnecessary conversion to
float64.
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Fix 'Schedulercache is corrupted' error
Fixes#50916
If an Assume()ed pod is Add()ed with a different nodeName, the podStates view of the pod is not corrected to reflect the actual nodeName. On the next Update(), the scheduler observes the mismatch and process exits.
```release-note
Fixed 'Schedulercache is corrupted' error in kube-scheduler
```
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.
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haveSame is suboptimal, fix it as well as the name
**What this PR does / why we need it**: Make the util function simpler, also faster by reducing a for loop.
**Special notes for your reviewer**:
**Release note**:
```release-note
None
```
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Add comment for preempt sunction.
**What this PR does / why we need it**:
Add explain for preempt sunction.
**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**:
```release-note
NONE
```
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Add admission handler for device resources allocation
**What this PR does / why we need it**:
Add admission handler for device resources allocation to fail fast during pod creation
**Which issue this PR fixes**
fixes#51592
**Special notes for your reviewer**:
@jiayingz Sorry, there is something wrong with my branch in #51895. And I think the existing comments in the PR might be too long for others to view. So I closed it and opened the new one, as we have basically reach an agreement on the implement :)
I have covered the functionality and unit test part here, and would set about the e2e part ASAP
/cc @jiayingz @vishh @RenaudWasTaken
**Release note**:
```release-note
NONE
```
