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95 lines
3.2 KiB
Go
95 lines
3.2 KiB
Go
/*
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Copyright 2020 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package topologymanager
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import (
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"k8s.io/api/core/v1"
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"k8s.io/klog/v2"
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"k8s.io/kubernetes/pkg/kubelet/cm/admission"
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"k8s.io/kubernetes/pkg/kubelet/cm/containermap"
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"k8s.io/kubernetes/pkg/kubelet/lifecycle"
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"k8s.io/kubernetes/pkg/kubelet/metrics"
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)
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type podScope struct {
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scope
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}
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// Ensure podScope implements Scope interface
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var _ Scope = &podScope{}
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// NewPodScope returns a pod scope.
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func NewPodScope(policy Policy) Scope {
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return &podScope{
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scope{
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name: podTopologyScope,
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podTopologyHints: podTopologyHints{},
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policy: policy,
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podMap: containermap.NewContainerMap(),
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},
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}
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}
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func (s *podScope) Admit(pod *v1.Pod) lifecycle.PodAdmitResult {
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bestHint, admit := s.calculateAffinity(pod)
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klog.InfoS("Best TopologyHint", "bestHint", bestHint, "pod", klog.KObj(pod))
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if !admit {
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if IsAlignmentGuaranteed(s.policy) {
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// increment only if we know we allocate aligned resources.
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metrics.ContainerAlignedComputeResourcesFailure.WithLabelValues(metrics.AlignScopePod, metrics.AlignedNUMANode).Inc()
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}
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metrics.TopologyManagerAdmissionErrorsTotal.Inc()
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return admission.GetPodAdmitResult(&TopologyAffinityError{})
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}
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for _, container := range append(pod.Spec.InitContainers, pod.Spec.Containers...) {
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klog.InfoS("Topology Affinity", "bestHint", bestHint, "pod", klog.KObj(pod), "containerName", container.Name)
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s.setTopologyHints(string(pod.UID), container.Name, bestHint)
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err := s.allocateAlignedResources(pod, &container)
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if err != nil {
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metrics.TopologyManagerAdmissionErrorsTotal.Inc()
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return admission.GetPodAdmitResult(err)
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}
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}
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if IsAlignmentGuaranteed(s.policy) {
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// increment only if we know we allocate aligned resources.
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klog.V(4).InfoS("Resource alignment at pod scope guaranteed", "pod", klog.KObj(pod))
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metrics.ContainerAlignedComputeResources.WithLabelValues(metrics.AlignScopePod, metrics.AlignedNUMANode).Inc()
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}
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return admission.GetPodAdmitResult(nil)
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}
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func (s *podScope) accumulateProvidersHints(pod *v1.Pod) []map[string][]TopologyHint {
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var providersHints []map[string][]TopologyHint
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for _, provider := range s.hintProviders {
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// Get the TopologyHints for a Pod from a provider.
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hints := provider.GetPodTopologyHints(pod)
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providersHints = append(providersHints, hints)
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klog.InfoS("TopologyHints", "hints", hints, "pod", klog.KObj(pod))
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}
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return providersHints
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}
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func (s *podScope) calculateAffinity(pod *v1.Pod) (TopologyHint, bool) {
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providersHints := s.accumulateProvidersHints(pod)
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bestHint, admit := s.policy.Merge(providersHints)
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klog.InfoS("PodTopologyHint", "bestHint", bestHint, "pod", klog.KObj(pod))
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return bestHint, admit
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}
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