71 lines
2.4 KiB
Go
71 lines
2.4 KiB
Go
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/*
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Copyright 2016 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 kubelet
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import (
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"fmt"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/v1"
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"k8s.io/kubernetes/pkg/fieldpath"
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)
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// defaultPodLimitsForDownwardApi copies the input pod, and optional container,
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// and applies default resource limits. it returns a copy of the input pod,
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// and a copy of the input container (if specified) with default limits
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// applied. if a container has no limit specified, it will default the limit to
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// the node allocatable.
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// TODO: if/when we have pod level resources, we need to update this function
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// to use those limits instead of node allocatable.
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func (kl *Kubelet) defaultPodLimitsForDownwardApi(pod *v1.Pod, container *v1.Container) (*v1.Pod, *v1.Container, error) {
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if pod == nil {
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return nil, nil, fmt.Errorf("invalid input, pod cannot be nil")
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}
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node, err := kl.getNodeAnyWay()
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if err != nil {
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return nil, nil, fmt.Errorf("failed to find node object, expected a node")
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}
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allocatable := node.Status.Allocatable
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podCopy, err := api.Scheme.Copy(pod)
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if err != nil {
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return nil, nil, fmt.Errorf("failed to perform a deep copy of pod object: %v", err)
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}
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outputPod, ok := podCopy.(*v1.Pod)
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if !ok {
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return nil, nil, fmt.Errorf("unexpected type returned from deep copy of pod object")
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}
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for idx := range outputPod.Spec.Containers {
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fieldpath.MergeContainerResourceLimits(&outputPod.Spec.Containers[idx], allocatable)
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}
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var outputContainer *v1.Container
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if container != nil {
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containerCopy, err := api.Scheme.DeepCopy(container)
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if err != nil {
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return nil, nil, fmt.Errorf("failed to perform a deep copy of container object: %v", err)
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}
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outputContainer, ok = containerCopy.(*v1.Container)
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if !ok {
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return nil, nil, fmt.Errorf("unexpected type returned from deep copy of container object")
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}
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fieldpath.MergeContainerResourceLimits(outputContainer, allocatable)
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}
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return outputPod, outputContainer, nil
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}
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