/* Copyright 2018 The Kubernetes Authors. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package podresources import ( "context" "fmt" v1 "k8s.io/api/core/v1" utilfeature "k8s.io/apiserver/pkg/util/feature" kubefeatures "k8s.io/kubernetes/pkg/features" "k8s.io/kubernetes/pkg/kubelet/metrics" "k8s.io/kubernetes/pkg/kubelet/types" podresourcesv1 "k8s.io/kubelet/pkg/apis/podresources/v1" ) // v1PodResourcesServer implements PodResourcesListerServer type v1PodResourcesServer struct { podsProvider PodsProvider devicesProvider DevicesProvider cpusProvider CPUsProvider memoryProvider MemoryProvider dynamicResourcesProvider DynamicResourcesProvider } // NewV1PodResourcesServer returns a PodResourcesListerServer which lists pods provided by the PodsProvider // with device information provided by the DevicesProvider func NewV1PodResourcesServer(providers PodResourcesProviders) podresourcesv1.PodResourcesListerServer { return &v1PodResourcesServer{ podsProvider: providers.Pods, devicesProvider: providers.Devices, cpusProvider: providers.Cpus, memoryProvider: providers.Memory, dynamicResourcesProvider: providers.DynamicResources, } } // List returns information about the resources assigned to pods on the node func (p *v1PodResourcesServer) List(ctx context.Context, req *podresourcesv1.ListPodResourcesRequest) (*podresourcesv1.ListPodResourcesResponse, error) { metrics.PodResourcesEndpointRequestsTotalCount.WithLabelValues("v1").Inc() metrics.PodResourcesEndpointRequestsListCount.WithLabelValues("v1").Inc() pods := p.podsProvider.GetPods() podResources := make([]*podresourcesv1.PodResources, len(pods)) p.devicesProvider.UpdateAllocatedDevices() for i, pod := range pods { pRes := podresourcesv1.PodResources{ Name: pod.Name, Namespace: pod.Namespace, Containers: make([]*podresourcesv1.ContainerResources, 0, len(pod.Spec.Containers)), } if utilfeature.DefaultFeatureGate.Enabled(kubefeatures.SidecarContainers) { pRes.Containers = make([]*podresourcesv1.ContainerResources, 0, len(pod.Spec.InitContainers)+len(pod.Spec.Containers)) for _, container := range pod.Spec.InitContainers { if !types.IsRestartableInitContainer(&container) { continue } pRes.Containers = append(pRes.Containers, p.getContainerResources(pod, &container)) } } for _, container := range pod.Spec.Containers { pRes.Containers = append(pRes.Containers, p.getContainerResources(pod, &container)) } podResources[i] = &pRes } response := &podresourcesv1.ListPodResourcesResponse{ PodResources: podResources, } return response, nil } // GetAllocatableResources returns information about all the resources known by the server - this more like the capacity, not like the current amount of free resources. func (p *v1PodResourcesServer) GetAllocatableResources(ctx context.Context, req *podresourcesv1.AllocatableResourcesRequest) (*podresourcesv1.AllocatableResourcesResponse, error) { metrics.PodResourcesEndpointRequestsTotalCount.WithLabelValues("v1").Inc() metrics.PodResourcesEndpointRequestsGetAllocatableCount.WithLabelValues("v1").Inc() response := &podresourcesv1.AllocatableResourcesResponse{ Devices: p.devicesProvider.GetAllocatableDevices(), CpuIds: p.cpusProvider.GetAllocatableCPUs(), Memory: p.memoryProvider.GetAllocatableMemory(), } return response, nil } // Get returns information about the resources assigned to a specific pod func (p *v1PodResourcesServer) Get(ctx context.Context, req *podresourcesv1.GetPodResourcesRequest) (*podresourcesv1.GetPodResourcesResponse, error) { metrics.PodResourcesEndpointRequestsTotalCount.WithLabelValues("v1").Inc() metrics.PodResourcesEndpointRequestsGetCount.WithLabelValues("v1").Inc() if !utilfeature.DefaultFeatureGate.Enabled(kubefeatures.KubeletPodResourcesGet) { metrics.PodResourcesEndpointErrorsGetCount.WithLabelValues("v1").Inc() return nil, fmt.Errorf("PodResources API Get method disabled") } pod, exist := p.podsProvider.GetPodByName(req.PodNamespace, req.PodName) if !exist { metrics.PodResourcesEndpointErrorsGetCount.WithLabelValues("v1").Inc() return nil, fmt.Errorf("pod %s in namespace %s not found", req.PodName, req.PodNamespace) } podResources := &podresourcesv1.PodResources{ Name: pod.Name, Namespace: pod.Namespace, Containers: make([]*podresourcesv1.ContainerResources, 0, len(pod.Spec.Containers)), } if utilfeature.DefaultFeatureGate.Enabled(kubefeatures.SidecarContainers) { podResources.Containers = make([]*podresourcesv1.ContainerResources, 0, len(pod.Spec.InitContainers)+len(pod.Spec.Containers)) for _, container := range pod.Spec.InitContainers { if !types.IsRestartableInitContainer(&container) { continue } podResources.Containers = append(podResources.Containers, p.getContainerResources(pod, &container)) } } for _, container := range pod.Spec.Containers { podResources.Containers = append(podResources.Containers, p.getContainerResources(pod, &container)) } response := &podresourcesv1.GetPodResourcesResponse{ PodResources: podResources, } return response, nil } func (p *v1PodResourcesServer) getContainerResources(pod *v1.Pod, container *v1.Container) *podresourcesv1.ContainerResources { containerResources := &podresourcesv1.ContainerResources{ Name: container.Name, Devices: p.devicesProvider.GetDevices(string(pod.UID), container.Name), CpuIds: p.cpusProvider.GetCPUs(string(pod.UID), container.Name), Memory: p.memoryProvider.GetMemory(string(pod.UID), container.Name), } if utilfeature.DefaultFeatureGate.Enabled(kubefeatures.KubeletPodResourcesDynamicResources) { containerResources.DynamicResources = p.dynamicResourcesProvider.GetDynamicResources(pod, container) } return containerResources }