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limits.go
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/
limits.go
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// Unless explicitly stated otherwise all files in this repository are licensed
// under the Apache License Version 2.0.
// This product includes software developed at Datadog (https://www.datadoghq.com/).
// Copyright 2016-2019 Datadog, Inc.
// Package limits contains function to calculate pod create/deletion limits.
package limits
// Parameters use to provide the parameters to the Calculation function.
type Parameters struct {
NbNodes int
NbPods int
NbAvailablesPod int
NbOldAvailablesPod int
NbCreatedPod int
MaxPodCreation int
MaxUnavailablePod int
MaxUnschedulablePod int
}
// CalculatePodToCreateAndDelete from the parameters return:
// * nbCreation: the number of pods to create
// * nbDeletion: the number of pods to delete.
func CalculatePodToCreateAndDelete(params Parameters) (nbCreation, nbDeletion int) {
nbCreation = params.NbNodes - params.NbPods
if nbCreation > params.MaxPodCreation {
nbCreation = params.MaxPodCreation
}
if nbCreation < 0 {
nbCreation = 0
}
nbDeletion = params.MaxUnavailablePod - (params.NbNodes - params.NbAvailablesPod - params.NbOldAvailablesPod)
if nbDeletion < 0 {
nbDeletion = 0
}
return nbCreation, nbDeletion
}