Support for Kubernetes v1.26 #7275
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Skipping CI for Draft Pull Request. |
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/test pull-gardener-e2e-kind-migration |
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@ialidzhikov Sounds reasonable! We don't have to wait for the next release, though. You can change https://github.com/gardener/gardener/blob/master/Makefile#L36 after this PR got merged. :) |
$ ./hack/compare-k8s-feature-gates.sh 1.25 1.26 Feature gates added in 1.26 compared to 1.25: APISelfSubjectReview AggregatedDiscoveryEndpoint ConsistentHTTPGetHandlers CrossNamespaceVolumeDataSource DynamicResourceAllocation EventedPLEG LegacyServiceAccountTokenTracking MinimizeIPTablesRestore PDBUnhealthyPodEvictionPolicy PodSchedulingReadiness StatefulSetStartOrdinal TopologyManagerPolicyAlphaOptions TopologyManagerPolicyBetaOptions TopologyManagerPolicyOptions ValidatingAdmissionPolicy WindowsHostNetwork Feature gates removed in 1.26 compared to 1.25: CSIMigrationOpenStack CSRDuration DefaultPodTopologySpread DynamicKubeletConfig IndexedJob NonPreemptingPriority PodAffinityNamespaceSelector PodOverhead PreferNominatedNode ServiceLBNodePortControl ServiceLoadBalancerClass SuspendJob Feature gates locked to default in 1.26 compared to 1.25: CPUManager CSIMigrationvSphere DelegateFSGroupToCSIDriver DevicePlugins DryRun EndpointSliceTerminatingCondition JobTrackingWithFinalizers KubeletCredentialProviders MixedProtocolLBService ServerSideApply ServiceIPStaticSubrange ServiceInternalTrafficPolicy WindowsHostProcessContainers
$ ./hack/compare-k8s-admission-plugins.sh 1.25 1.26 Admission plugins added in 1.26 compared to 1.25: ValidatingAdmissionPolicy Admission plugins removed in 1.26 compared to 1.25:
…troller-manager` $ ./hack/compare-k8s-controllers.sh 1.25 1.26 kube-controller-manager controllers added in 1.26 compared to 1.25: resource-claim-controller kube-controller-manager controllers removed in 1.26 compared to 1.25:
… kube-apiserver fields The kube-controller-manager flag `--pod-eviction-timeout` is deprecated in favor of the kube-apiserver flags `--default-not-ready-toleration-seconds` and `--default-unreachable-toleration-seconds`. The `--pod-eviction-timeout` flag does not have effect when the taint besed eviction is enabled. The taint based eviction is beta (enabled by default) since Kubernetes 1.13 and GA since Kubernetes 1.18. For more details, see kubernetes/kubernetes#74651. This commit allows configuring the kube-apiserver flags `--default-not-ready-toleration-seconds` and `--default-unreachable-toleration-seconds`. The `podEvictionTimeout` field is deprecated in favor of the newly introduced fields. gardener-apiserver no longer defaults the `podEvictionTimeout` field. gardener-apiserver also returns a warning when the `podEvictionTimeout` field is set.
…server_storage_db_total_size_in_bytes` The metric `etcd_db_total_size_in_bytes` is renamed to `apiserver_storage_db_total_size_in_bytes`. Ref kubernetes/kubernetes#113310.
Test runs of the integration test that uses this template prints the following warning about the issue in the template:
```
{"level":"info","ts":"2022-12-28T19:36:29.043+0200","logger":"KubeAPIWarningLogger","msg":"unknown field \"spec.template.spec.containers[0].nodeName\""}
```
After the removal of support for Kubernetes < 1.20 Shoot clusters (ref #6987), the kubeconfig Secret no longer has the `token` field. Basic auth cannot be enabled for K8s 1.19+ clusters, hence the kubeconfig Secret cannot contain the `username`/`password` fields anymore.
…rsion >= 1.26 This commit also adapts most of the testmachinery integration tests to use the `shoots/adminkubeconfig` subresource instead of the static kubeconfig. The Shoot creation intergration is still using the static kubeconfig and it is downloading it to `$TM_KUBECONFIG_PATH/shoot.config`. This commit sets `enableStaticTokenKubeconfig=true` until we figure out which tests/components are using this downloaded kubeconfig.
The constraint `ConstraintK8sLess126` is currently not used by gardener/gardener but it is introduced for usage from the extensions.
For the reasoning, see #7275 (comment)
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@ialidzhikov: The following test failed, say
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LGTM label has been added. Git tree hash: f07a5e5e448e2d838373d4a2ec866a6ae0fc50f5
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/approve |
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: rfranzke The full list of commands accepted by this bot can be found here. The pull request process is described here
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How to categorize this PR?
/area open-source usability
/kind enhancement
/topology garden seed shoot
What this PR does / why we need it:
Support for Kubernetes v1.26
Which issue(s) this PR fixes:
Part of #6773
Special notes for your reviewer:
k8s.io/*Golang sources, this item is tracked separately in Upgradek8s.io/*tov0.26,sigs.k8s.io/controller-runtimetov0.14#7230.Release note: