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Set pids limit at pod level
**What this PR does / why we need it**:
Add a new Alpha Feature to set a maximum number of pids per Pod.
This is to allow the use case where cluster administrators wish
to limit the pids consumed per pod (example when running a CI system).
By default, we do not set any maximum limit, If an administrator wants
to enable this, they should enable `SupportPodPidsLimit=true` in the
`--feature-gates=` parameter to kubelet and specify the limit using the
`--pod-max-pids` parameter.
The limit set is the total count of all processes running in all
containers in the pod.
**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#43783
**Special notes for your reviewer**:
**Release note**:
```release-note
New alpha feature to limit the number of processes running in a pod. Cluster administrators will be able to place limits by using the new kubelet command line parameter --pod-max-pids. Note that since this is a alpha feature they will need to enable the "SupportPodPidsLimit" feature.
```
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typo of errUnsuportedVersion
**What this PR does / why we need it**:
typo of errUnsuportedVersion in pkg/kubelet/cm/deviceplugin/types.go
**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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Remove unused code in UT files in pkg/
**What this PR does / why we need it**:
Remove unused code in UT files in pkg/ .
**Release note**:
```release-note
NONE
```
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Fix device plugin endpoint UT
**What this PR does / why we need it**:
Fix some issues in device plugin endpoint UT.
**Which issue(s) this PR fixes**:
Fixes#55920
**Special notes for your reviewer**:
@jiayingz @RenaudWasTaken @lichuqiang PTAL.
/sig node
**Release note**:
```release-note
None
```
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Handle Unhealthy devices
Update node capacity with sum of both healthy and unhealthy devices.
Node allocatable reflect only healthy devices.
**What this PR does / why we need it**:
Currently node capacity only reflects healthy devices. Unhealthy devices are ignored totally while updating node status. This PR handles unhealthy devices while updating node status.
**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#57241
**Special notes for your reviewer**:
**Release note**:
<!-- Write your release note:
Handle Unhealthy devices
```release-note
Handle Unhealthy devices
```
/cc @tengqm @ConnorDoyle @jiayingz @vishh @jeremyeder @sjenning @resouer @ScorpioCPH @lichuqiang @RenaudWasTaken @balajismaniam
/sig node
Add a new Alpha Feature to set a maximum number of pids per Pod.
This is to allow the use case where cluster administrators wish
to limit the pids consumed per pod (example when running a CI system).
By default, we do not set any maximum limit, If an administrator wants
to enable this, they should enable `SupportPodPidsLimit=true` in the
`--feature-gates=` parameter to kubelet and specify the limit using the
`--pod-max-pids` parameter.
The limit set is the total count of all processes running in all
containers in the pod.
This moves plugin/pkg/scheduler to pkg/scheduler and
plugin/cmd/kube-scheduler to cmd/kube-scheduler.
Bulk of the work was done with gomvpkg, except for kube-scheduler main
package.
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>.
new testcase to cgroup_manager_linux.go
a new test case to adaptName(), for testing "cgroupManagerType != libcontainerSystemd"
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Remove redundant sleep from ReRegistration unit test case
/kind cleanup
/sig node
**What this PR does / why we need it**:
Once upon a time, there was a race in the device plugin registration logic. At that time, [list()](5cac9fc984/pkg/kubelet/deviceplugin/manager.go (L206)) and [listAndWatch()](5cac9fc984/pkg/kubelet/deviceplugin/manager.go (L224)) used to be separate functions. Race was there for taking manager.mutex lock from two places. [One, from within the m.addEndpoint()](5cac9fc984/pkg/kubelet/deviceplugin/manager.go (L214)) and the [second, from within m.Devices()](5cac9fc984/pkg/kubelet/deviceplugin/manager.go (L137)). This race was making `TestDevicePluginReRegistration` flaky as explained below.
```
1. p1.Register(socketName, testResourceName)
2. // Wait for the first callback to be issued.
3. <-callbackChan
4. devices := m.Devices()
```
* L#1 leads to eventually **asynchronous** invocation of m.addEndpoint(), let say **thread1**.
* L#3 holds the test case execution till the [callback gets invoked](5cac9fc984/pkg/kubelet/deviceplugin/endpoint.go (L108)). This means test case execution waits on channel till the **thread1** reaches the point where [e.list() call completes in the addEndpoint.](5cac9fc984/pkg/kubelet/deviceplugin/manager.go (L206))
* L#4 triggers a new thread. thread1 and this new thread are both racing for m.mutex.Lock(). Former, in the addEndpoint() and later one in the m.Devices(). If m.Devices wins the race, result is the test case failure because endpoint gets added in the manager only after taking mutex.Lock() in the addEndpoint().
To deal with this flake, we added `Sleep` between L#3 and L#4. `Sleep` was getting some extra time to addEndpoint() and thus making thread1 win the race each time.
Above explained race scenario got fixed and merged sometime back in this PR:
[Deviceplugin refactoring: merge func list and listwatch in endpoint into one](https://github.com/kubernetes/kubernetes/pull/52149)
With the above PR, callback function is invoked from e.run() which makes sure that test case waits on channel till the endpoint is added and devices are updated
Above explained race scenario does not exist now, therefore removing redundant sleeps from the test case.
Tested:
go test -race -count 500 k8s.io/kubernetes/pkg/kubelet/cm/deviceplugin -run TestDevicePluginReRegistration -timeout 5h
Related #52616#56026
**Special notes for your reviewer**:
**Release note**:
```release-note
None
```
/cc @vishh @derekwaynecarr @jiayingz @RenaudWasTaken @lichuqiang @ScorpioCPH @tengqm @mindprince @ConnorDoyle @jeremyeder
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Add vikaschoudhary16 as reviewer in pkg/kubelet/cm/deviceplugin
**What this PR does / why we need it**:
Add github user vikaschoudhary16 (me) to the reviewers list for pkg/kubelet/cm/deviceplugin
**Special notes for your reviewer**:
I would like to help with the review load in this package.
```release-note
None
```
/sig node
/cc @vishh @jiayingz @derekwaynecarr @mindprince @RenaudWasTaken @ConnorDoyle
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Revert back #57278
**What this PR does / why we need it**:
This PR reverts back to behavior of scanning Limits.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Related #
#57276#57170
**Special notes for your reviewer**:
**Release note**:
```release-note
None
```
/sig node
/cc @vishh @ConnorDoyle @jiayingz
Automatic merge from submit-queue (batch tested with PRs 57591, 57369). 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>.
Fix a race in the endpoint.go
**What this PR does / why we need it**:
This PR fixes a race in the endpoint.go
Fixes#56026
-->
```release-note
None
```
/sig node
/cc @RenaudWasTaken @ConnorDoyle @jiayingz @mindprince @ScorpioCPH @resouer @tengqm @vishh
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cpumanager: Propagate error up instead panic
**What this PR does / why we need it**:
**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#57239
**Special notes for your reviewer**:
/assign @sjenning
**Release note**:
```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>.
Fix device manager to scan resources.Requests
**What this PR does / why we need it**:
This PR makes device manager to scan resources.Requests from the container spec. Currently
it scans resources.Limits. For extended resources, it is not mandatory for resources.Limits to be present in the container spec and if Limits are present, validation logic ensures that Limits will always be equal to Requests.
Fixes#57276
**Special notes for your reviewer**:
**Release note**:
```release-note
None
```
/sig node
/cc @ConnorDoyle @vishh @jiayingz @RenaudWasTaken @tengqm @resouer @mindprince
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fix deviceplugin test file create leak file problem
When execute make test, this test file will create a file named "kubelet_internal_checkpoint" in k8s directory and not delete it.
This patch fix this error
**What this PR does / why we need it**:
**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#56365
**Special notes for your reviewer**:
**Release note**:
```release-note
```
Automatic merge from submit-queue (batch tested with PRs 56410, 56707, 56661, 54998, 56722). 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>.
Move some kubelet constants to a common place
**What this PR does / why we need it**:
More context, see: https://github.com/kubernetes/kubernetes/issues/56516
**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#56516
[thanks @ixdy for verifying this!]
**Special notes for your reviewer**:
@ixdy how can I verify #56516 against this locally?
/cc @ixdy @mtaufen
**Release note**:
```release-note
NONE
```
Automatic merge from submit-queue (batch tested with PRs 56337, 56546, 56550, 56633, 56635). 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 redundant code in container manager.
- Reuse stub implementations from unsupported implementations.
- Delete test file that didn't contain any tests.
**Release note**:
```release-note
NONE
```
/kind cleanup
/sig node
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Use file store utility for device plugin checkpointing
Partially address issue #54088
cc @sjenning @jeremyeder @jiayingz @vishh
/sig node
Automatic merge from submit-queue (batch tested with PRs 54410, 56184, 56199, 56191, 56231). 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>.
CPU Manager panics on state initialization error.
**What this PR does / why we need it**:
- CPU Manager panics on state initialization error.
- Update unit tests accordingly.
- Minor related cleanup in `state_file.go`.
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
/kind bug
/sig node
/priority important-soon
Blocks #52031
/assign @balajismaniam
cc @flyingcougar
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Cpu manager reconcile loop - restore state
**What this PR does / why we need it**:
Cpu manager reconcile loop can add orphaned containers to `State` calling `policy.AddContainer()`
Previous PR: #54409
e2e tests PR: #53378
Blocked by #56191
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Add ConnorDoyle as approver in /pkg/kubelet/cm.
**What this PR does / why we need it**:
- Add github user `ConnorDoyle` (me) to the approvers list for `pkg/kubelet/cm`.
**Special notes for your reviewer**:
I would like to help with the review load in this package. I believe I have demonstrated good stewardship of sub-packages in this part of the code base.
```release-note
NONE
```
/sig node
/kind cleanup
/assign @derekwaynecarr
Kubernetes Submit Queue