mirror of
https://github.com/kubernetes-sigs/node-feature-discovery.git
synced 2025-03-06 16:57:10 +00:00
8b9df3cf31
Move the rule processing of matchFeatures and matchAny from source/custom package over to pkg/apis/nfd, aiming for better integrity and re-usability of the code. Does not change the CRD API as such, just adds more supportive functions.
100 lines
2.6 KiB
Go
100 lines
2.6 KiB
Go
/*
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Copyright 2021 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 v1alpha1
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import (
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"strings"
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"fmt"
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"sigs.k8s.io/node-feature-discovery/pkg/api/feature"
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)
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// Execute the rule against a set of input features.
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func (r *Rule) Execute(features map[string]*feature.DomainFeatures) (map[string]string, error) {
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if len(r.MatchAny) > 0 {
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// Logical OR over the matchAny matchers
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matched := false
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for _, matcher := range r.MatchAny {
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if m, err := matcher.match(features); err != nil {
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return nil, err
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} else if m {
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matched = true
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break
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}
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}
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if !matched {
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return nil, nil
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}
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}
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if len(r.MatchFeatures) > 0 {
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if m, err := r.MatchFeatures.match(features); err != nil {
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return nil, err
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} else if !m {
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return nil, nil
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}
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}
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labels := make(map[string]string, len(r.Labels))
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for k, v := range r.Labels {
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labels[k] = v
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}
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return labels, nil
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}
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func (e *MatchAnyElem) match(features map[string]*feature.DomainFeatures) (bool, error) {
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return e.MatchFeatures.match(features)
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}
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func (m *FeatureMatcher) match(features map[string]*feature.DomainFeatures) (bool, error) {
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// Logical AND over the terms
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for _, term := range *m {
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split := strings.SplitN(term.Feature, ".", 2)
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if len(split) != 2 {
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return false, fmt.Errorf("invalid selector %q: must be <domain>.<feature>", term.Feature)
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}
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domain := split[0]
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// Ignore case
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featureName := strings.ToLower(split[1])
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domainFeatures, ok := features[domain]
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if !ok {
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return false, fmt.Errorf("unknown feature source/domain %q", domain)
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}
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var m bool
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var err error
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if f, ok := domainFeatures.Keys[featureName]; ok {
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m, err = term.MatchExpressions.MatchKeys(f.Elements)
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} else if f, ok := domainFeatures.Values[featureName]; ok {
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m, err = term.MatchExpressions.MatchValues(f.Elements)
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} else if f, ok := domainFeatures.Instances[featureName]; ok {
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m, err = term.MatchExpressions.MatchInstances(f.Elements)
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} else {
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return false, fmt.Errorf("%q feature of source/domain %q not available", featureName, domain)
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}
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if err != nil {
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return false, err
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} else if !m {
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return false, nil
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}
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}
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return true, nil
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}
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