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54 lines
1.9 KiB
Go
54 lines
1.9 KiB
Go
/*
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Copyright 2025 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 resourceclaim
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import (
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resourceapi "k8s.io/api/resource/v1beta1"
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)
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// ToleratesTaint checks if the toleration tolerates the taint.
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// The matching follows the rules below:
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//
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// 1. Empty toleration.effect means to match all taint effects,
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// otherwise taint effect must equal to toleration.effect.
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// 2. If toleration.operator is 'Exists', it means to match all taint values.
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// 3. Empty toleration.key means to match all taint keys.
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// If toleration.key is empty, toleration.operator must be 'Exists';
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// this combination means to match all taint values and all taint keys.
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func ToleratesTaint(toleration resourceapi.DeviceToleration, taint resourceapi.DeviceTaint) bool {
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// This code was copied from https://github.com/kubernetes/kubernetes/blob/f007012f5fe49e40ae0596cf463a8e7b247b3357/staging/src/k8s.io/api/core/v1/toleration.go#L39-L56.
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// It wasn't placed in the resourceapi package because code related to logic
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// doesn't belong there.
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if toleration.Effect != "" && toleration.Effect != taint.Effect {
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return false
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}
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if toleration.Key != "" && toleration.Key != taint.Key {
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return false
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}
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switch toleration.Operator {
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// Empty operator means Equal, should be set because of defaulting.
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case "", resourceapi.DeviceTolerationOpEqual:
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return toleration.Value == taint.Value
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case resourceapi.DeviceTolerationOpExists:
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return true
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default:
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return false
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}
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}
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