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Update the configmap manifest in CoreDNS
**What this PR does / why we need it**:
This PR updates the corefile to retain the pod requests support like in kube-dns. This helps when upgrading CoreDNS using kubeadm upgrade (#55952).
**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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fixing issue of feature gate not being turned off properly
Fixes#56166
Adding proper defer and toggle of feature gate for BlockVolume support
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Sts per Pod Name Label
**What this PR does / why we need it**:
StatefulSet controller will add a label for each Pod in the StatefulSet. The label is of the form
`statefulset.kubernetes.io/pod-name: <pod.Name>`. This allows a unique service to be created for each Pod in the StatefulSet.
Fixes #44103, #28660
```release-note
StatefulSet controller will create a label for each Pod in a StatefulSet. The label is named statefulset.kubernetes.io/pod-name and it is equal to the name of the Pod. This allows users to create a Service per Pod to expose a connection to individual Pods.
```
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Adds device plugin allocation latency metric.
For #53497
**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 #
**Special notes for your reviewer**:
**Release note**:
```release-note
```
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Initial basic bootstrap-checkpoint support
**What this PR does / why we need it**:
Adds initial support for Pod checkpointing to allow for controlled recovery of the control plane during self host failure conditions.
fixes#49236
xref https://github.com/kubernetes/features/issues/378
**Special notes for your reviewer**:
Proposal is here: https://docs.google.com/document/d/1hhrCa_nv0Sg4O_zJYOnelE8a5ClieyewEsQM6c7-5-o/edit?ts=5988fba8#
1. Controlled tests work, but I have not tested the self hosted api-server recovery, that requires validation and logs. /cc @luxas
2. In adding hooks for checkpoint manager much of the tests around basicpodmanager appears to be stub'd. This has become an anti-pattern in the code and should be avoided.
3. I need a node-e2e to ensure consistency of behavior.
**Release note**:
```
Add basic bootstrap checkpointing support to the kubelet for control plane recovery
```
/cc @kubernetes/sig-cluster-lifecycle-misc @kubernetes/sig-node-pr-reviews
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Add Custom Pod DNS to Kubernetes API
**What this PR does / why we need it**:
Ref:
- Feature issue: https://github.com/kubernetes/features/issues/504
- Proposal: https://github.com/kubernetes/community/pull/1276
This PR adds the relevant APIs, validation check and the underlying kubelet changes.
**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 #NONE
**Special notes for your reviewer**:
/sig network
@kubernetes/sig-network-api-reviews
/assign @bowei @thockin
**Release note**:
```release-note
Add DNSConfig field to PodSpec and support "None" mode for DNSPolicy (Alpha).
```
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Add Pod-level local ephemeral storage metric in Summary API
This PR adds pod-level ephemeral storage metric into Summary API.
Pod-level ephemeral storage usage is the sum of all containers and local
ephemeral volume including EmptyDir (if not backed up by memory or
hugepages), configueMap, and downwardAPI.
Address issue #55978
**Release note**:
```release-note
Add pod-level local ephemeral storage metric in Summary API. Pod-level ephemeral storage reports the total filesystem usage for the containers and emptyDir volumes in the measured Pod.
```
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Azure Load Balancer reconciliation should consider all Kubernetes-controlled properties of a LB NSG
**What this PR does / why we need it**:
This PR refers to issue #55733
With this PR, Kubernetes will update Azure nsg rules based on not just name, but also based on other properties such as destination port range and destination ip address.
We need it because right now Kubernetes will detect the difference and update only if there is difference in Name of nsg rule. It's been working fine for changing destination port range and source IP address because these two are part of the Name. (which external users should not assume) Basically right now, Kubernetes won't detect the difference if I go ahead and change any part of nsg rule using port UI.
This PR will let Kubernetes detect the difference and always try to reconcile nsg rules with service definition.
**Which issue(s) this PR fixes** :
Fixes#55733
**Special notes for your reviewer**: None
**Release note**:
```release-note
Kubernetes update Azure nsg rules based on not just difference in Name, but also in Protocol, SourcePortRange, DestinationPortRange, SourceAddressPrefix, DestinationAddressPrefix, Access, and Direction.
```
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Make versioned types for webhook admission config
Versioned webhook admission config type as promised in https://github.com/kubernetes/kubernetes/pull/54414.
@kubernetes/sig-api-machinery-pr-reviews
@ericchiang as promised. fyi.
```yaml
kind: AdmissionConfiguration
apiVersion: apiserver.k8s.io/v1alpha1
plugins:
- name: GenericAdmissionWebhook
configuration:
kind: WebhookAdmission
apiVersion: apiserver.config.k8s.io/v1alpha1
kubeConfigFile: /path/to/my/file
```
`ADMISSION_CONTROL_CONFIG_FILE=../foo.yaml hack/local-up-cluster.sh`
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Automatically opt into dependent feature gates when using kubeadm
**What this PR does / why we need it**:
There will be a dependency chain between feature gates. kubeadm needs to automatically opt into dependent feature gates of a chosen one.
**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/kubeadm/issues/554](https://github.com/kubernetes/kubeadm/issues/554)
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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Add initial Virtual Machine Scale Sets (VMSS) support in Azure
**What this PR does / why we need it**:
This is the first step of adding Virtual Machine Scale Sets (VMSS) support in Azure, it
- Adds vmType params to support both vmss and standard in Azure
- Adds initial InstanceID/InstanceType/IP/Routes support for vmss instances
- Master nodes may not belong to any scale sets, so it falls back to VirtualMachinesClient for such instances
Have validated that nodes could be registered and pods could be scheduled and run correctly.
Still more work to do to fully support Azure VMSS. And next steps are tracking at #43287.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Part of #43287.
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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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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Graduate the admission and admissionregistration (webhook part) API to v1beta1
ref: kubernetes/features#492
Most changes are mechanical. Please take a look at the commit message to see if the commit is worth reviewing.
```release-note
Action required:
The `admission/v1alpha1` API has graduated to `v1beta1`. Please delete your existing webhooks before upgrading the cluster, and update your admission webhooks to use the latest API, because the API has backwards incompatible changes.
The webhook registration related part of the `admissionregistration` API has graduated to `v1beta1`. Please delete your existing configurations before upgrading the cluster, and update your configuration file to use the latest API.
```
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Don't call f.BeforeEach() again in ingress suite
**What this PR does / why we need it**: Calling f.BeforeEach() explicitly in ingress suite is causing test panics. See #56089.
**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 (hopefully) #56089
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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Be less agressive and more patient when creating large master.
**What this PR does / why we need it**:
Workaround for #55777
**Release note**:
```release-note
NONE
```
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Improve messages around waiting for pods.
**What this PR does / why we need it**:
This is a step towards solving #55785
**Release note**:
```release-note
NONE
```
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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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Add Amazon NLB support
**What this PR does / why we need it**:
This adds support for AWS's NLB for `LoadBalancer` services.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
Fixes#52173
**Special notes for your reviewer**:
This is NOT yet ready for merge, but I'd love any feedback before it is.
This requires at least `v1.10.40` of the [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go), which is not yet included in Kubernetes. Per @justinsb, I'm waiting on possibly #48314 to update to `v1.10.40` or some other PR.
I tried to make the change as easy to review as possible, so some LoadBalancer logic is duplicated in the `if isNLB(annotations)` blocks. I can refactor that and sprinkle more `isNLB()` switches around, but it might be harder to view the diff.
**Other Notes:**
* NLB's subnets cannot be modified after creation (maybe look for public subnets in all AZ's?). Currently, I'm just using `c.findELBSubnets()`
* Health check uses TCP with all the NLB default values. I was thinking HTTP health checks via annotation could be added later. Should that go into this PR?
* ~~`externalTrafficPolicy`/`healthCheckNodePort` are ignored. Should those be implemented for this PR?~~
* `externalTrafficPolicy` and subsequent `healthCheckNodePort` are handled properly. This may come with uneven load balancing, as NLB doesn't support weighted backends.
* With classic ELB, you have a security group the ELB is inside of to associate Instance (k8s node) SG rules with a LoadBalancer (k8s Service), but NLB's don't have a security group. Instead, I use the `Description` field on [`ec2.IpRange`](https://docs.aws.amazon.com/sdk-for-go/api/service/ec2/#IpRange) with the following annotations. Is this ok? I couldn't think of another way to associate SG rule to the NLB
* Node SG gets an rule added for VPC cidr on NodePort for Health Check with annotation in description `kubernetes.io/rule/nlb/health=<loadBalancerName>`
* Node SG gets an rule added for `loadBalancerSourceRanges` to NodePort for client traffic with annotation in description `kubernetes.io/rule/nlb/client=<loadBalancerName>`
* **Note: if `loadBalancerSourceRanges` is unspecified, this opens instance security groups to traffic from `0.0.0.0/0` on the service's nodePorts**
* Respects internal annotation
* Creates a TargetGroup per frontend port: simplifies updates when you have same backend port for multiple front end ports.
* Does not (yet) verify that we're under the NLB limits in terms of # of listeners
* `UpdateLoadBalancer()` basically just calls `EnsureLoadBalancer` for NLB's. Is this ok?
**Areas for future improvement or optimization**:
* A new annotation indicating a new security group should be created for NLB traffic and instances would be placed in this new SG. (Could bump up against the default limit of 5 SG's per instance)
* Only create a client health check security group rule when the VPC cidr is not a subset of `spec.loadBalancerSourceRanges`
* Consolidate TargetGroups if a service has 2+ frontend ports and the same nodePort.
* A new annotation for specifying TargetGroup Health Check options.
**Release note**:
```release-notes
Add Amazon NLB support - Fixes#52173
```
ping @justinsb @bchav
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Take disk requests into account during evictions
fixes#54314
This PR is part of the local storage feature, and it makes the eviction manager take disk requests into account during disk evictions.
This uses the same eviction strategy as we do for memory.
Disk requests are only considered when the LocalStorageCapacityIsolation feature gate is enabled. This is enforced by adding a check for the feature gate in getRequests().
I have added unit testing to ensure that previous behavior is preserved when the feature gate is disabled.
Most of the changes are testing. Reviewers should focus on changes in **eviction/helpers.go**
/sig node
/assign @jingxu97 @vishh
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apiserver: pass a listener into genericapiserver bootstrapping
**What this PR does / why we need it**:
>At the moment we pass a port via the options into the config. A zero port does not work because the loopback clients created during apiserver initialization need to know the port before. Passing a listener into the server instead would allow us to use a zero port beforehand and bootstrapping order should be fine.
**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#55784
**Special notes for your reviewer**:
**Release note**:
```release-note
NONE
```
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Changes nvidia-gpu device plugin addon config settings:
- Runs as system critical pod
- Makes resource limits to match its resource requets
- Modifies test/e2e/scheduling/nvidia-gpus.go to cope with the recent
change of running the device plugin as a system addon.
- The resource settings of the addon is based on the test results
from 8 nvidia-tesla-k80 gpus.
**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 #
**Special notes for your reviewer**:
**Release note**:
```release-note
```
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Extends deviceplugin to gracefully handle full device plugin lifecycle.
**What this PR does / why we need it**:
- Instead of using cm.capacity field to communicate device plugin resource capacity,
this PR changes to use an explicit cm.GetDevicePluginResourceCapacity() function
that returns device plugin resource capacity as well as any inactive device plugin resource.
Kubelet syncNodeStatus call this function during its periodic run to update node status
capacity and allocatable. After this call, device plugin can remove the inactive device
plugin resource from its allDevices field as the update is already pushed to API server.
- Extends device plugin checkpoint data to record registered resources
so that we can finish resource removing even upon kubelet restarts.
- Passes sourcesReady from kubelet to device plugin to avoid removing
inactive pods during grace period of kubelet restart.
- Extends gpu_device_plugin e2e_node test to verify that scheduled pods
can continue to run even after device plugin deletion and kubelet
restarts.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Together with https://github.com/kubernetes/kubernetes/pull/54488, fixes https://github.com/kubernetes/kubernetes/issues/53395
**Special notes for your reviewer**:
**Release note**:
```release-note
Extends deviceplugin to gracefully handle full device plugin lifecycle.
```
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auth/gcp: capture stderr from gcloud config-helper
Fixes https://github.com/kubernetes/client-go/issues/327
Currently we're not capturing stderr when shelling out to "gcloud config
config-helper --format=json" fails. This patch is capturing the stderr in the
error message returned.
This gcloud command sometimes returns an upgrade reminder (in stderr) so using
`cmd.CombinedOutput()` is not an option here. Maybe we should also add an unit
test in gcp_test.go capturing this situation, too, in case someone decides to
replace this with CombinedOutput someday.
/assign @cjcullen
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Fix panic when AlphaFeatureGate isn't configured for gcp.
**What this PR does / why we need it**:
When AlphaFeatureGate isn't configured, the pointer will be nil. This PR fixes 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#56009
**Special notes for your reviewer**:
cc @jsiebens
**Release note**:
```release-note
NONE
```
