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1. Pod cgrooup configured to use resources from pod spec if feature is enabled and resources are set at pod-level 2. Container cgroup limits defaulted to pod-level limits is container limits are not set
71 lines
2.3 KiB
Go
71 lines
2.3 KiB
Go
//go:build linux
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// +build linux
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/*
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Copyright 2021 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 kuberuntime
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import (
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/api/resource"
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utilfeature "k8s.io/apiserver/pkg/util/feature"
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runtimeapi "k8s.io/cri-api/pkg/apis/runtime/v1"
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"k8s.io/kubernetes/pkg/features"
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resourcehelper "k8s.io/component-helpers/resource"
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)
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func (m *kubeGenericRuntimeManager) convertOverheadToLinuxResources(pod *v1.Pod) *runtimeapi.LinuxContainerResources {
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resources := &runtimeapi.LinuxContainerResources{}
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if pod.Spec.Overhead != nil {
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cpu := pod.Spec.Overhead.Cpu()
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memory := pod.Spec.Overhead.Memory()
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// For overhead, we do not differentiate between requests and limits. Treat this overhead
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// as "guaranteed", with requests == limits
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resources = m.calculateLinuxResources(cpu, cpu, memory)
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}
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return resources
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}
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func (m *kubeGenericRuntimeManager) calculateSandboxResources(pod *v1.Pod) *runtimeapi.LinuxContainerResources {
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opts := resourcehelper.PodResourcesOptions{
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ExcludeOverhead: true,
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// SkipPodLevelResources is set to false when PodLevelResources feature is enabled.
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SkipPodLevelResources: !utilfeature.DefaultFeatureGate.Enabled(features.PodLevelResources),
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}
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req := resourcehelper.PodRequests(pod, opts)
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lim := resourcehelper.PodLimits(pod, opts)
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var cpuRequest *resource.Quantity
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if _, cpuRequestExists := req[v1.ResourceCPU]; cpuRequestExists {
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cpuRequest = req.Cpu()
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}
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return m.calculateLinuxResources(cpuRequest, lim.Cpu(), lim.Memory())
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}
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func (m *kubeGenericRuntimeManager) applySandboxResources(pod *v1.Pod, config *runtimeapi.PodSandboxConfig) error {
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if config.Linux == nil {
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return nil
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}
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config.Linux.Resources = m.calculateSandboxResources(pod)
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config.Linux.Overhead = m.convertOverheadToLinuxResources(pod)
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return nil
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}
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