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79 lines
2.9 KiB
Go
79 lines
2.9 KiB
Go
/*
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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 util
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import (
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v1 "k8s.io/api/core/v1"
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v1helper "k8s.io/kubernetes/pkg/apis/core/v1/helper"
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)
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// For each of these resources, a pod that doesn't request the resource explicitly
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// will be treated as having requested the amount indicated below, for the purpose
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// of computing priority only. This ensures that when scheduling zero-request pods, such
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// pods will not all be scheduled to the machine with the smallest in-use request,
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// and that when scheduling regular pods, such pods will not see zero-request pods as
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// consuming no resources whatsoever. We chose these values to be similar to the
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// resources that we give to cluster addon pods (#10653). But they are pretty arbitrary.
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// As described in #11713, we use request instead of limit to deal with resource requirements.
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const (
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// DefaultMilliCPURequest defines default milli cpu request number.
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DefaultMilliCPURequest int64 = 100 // 0.1 core
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// DefaultMemoryRequest defines default memory request size.
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DefaultMemoryRequest int64 = 200 * 1024 * 1024 // 200 MB
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)
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// GetNonzeroRequests returns the default cpu and memory resource request if none is found or
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// what is provided on the request.
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func GetNonzeroRequests(requests *v1.ResourceList) (int64, int64) {
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return GetNonzeroRequestForResource(v1.ResourceCPU, requests),
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GetNonzeroRequestForResource(v1.ResourceMemory, requests)
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}
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// GetNonzeroRequestForResource returns the default resource request if none is found or
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// what is provided on the request.
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func GetNonzeroRequestForResource(resource v1.ResourceName, requests *v1.ResourceList) int64 {
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switch resource {
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case v1.ResourceCPU:
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// Override if un-set, but not if explicitly set to zero
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if _, found := (*requests)[v1.ResourceCPU]; !found {
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return DefaultMilliCPURequest
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}
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return requests.Cpu().MilliValue()
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case v1.ResourceMemory:
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// Override if un-set, but not if explicitly set to zero
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if _, found := (*requests)[v1.ResourceMemory]; !found {
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return DefaultMemoryRequest
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}
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return requests.Memory().Value()
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case v1.ResourceEphemeralStorage:
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quantity, found := (*requests)[v1.ResourceEphemeralStorage]
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if !found {
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return 0
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}
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return quantity.Value()
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default:
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if v1helper.IsScalarResourceName(resource) {
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quantity, found := (*requests)[resource]
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if !found {
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return 0
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}
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return quantity.Value()
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}
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}
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return 0
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}
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