mirror of
https://github.com/kubernetes-sigs/node-feature-discovery.git
synced 2025-03-14 20:56:42 +00:00
a8092927fc
Change the custom feature source of nfd-worker to use the newly added internal config API for its own configuration. It now uses the internal types for json/yaml unmarshalling but converts them to external nfdv1alpha1 API to do the actual rule matching as the internal API does not duplicate that functionality.
125 lines
3.6 KiB
Go
125 lines
3.6 KiB
Go
/*
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Copyright 2020-2021 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 custom
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import (
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"fmt"
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"os"
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"k8s.io/klog/v2"
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nfdv1alpha1 "sigs.k8s.io/node-feature-discovery/pkg/apis/nfd/v1alpha1"
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"sigs.k8s.io/node-feature-discovery/pkg/utils"
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"sigs.k8s.io/node-feature-discovery/source"
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api "sigs.k8s.io/node-feature-discovery/source/custom/api"
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)
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// Name of this feature source
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const Name = "custom"
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// The config files use the internal API type.
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type config []api.Rule
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// newDefaultConfig returns a new config with pre-populated defaults
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func newDefaultConfig() *config {
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return &config{}
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}
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// customSource implements the LabelSource and ConfigurableSource interfaces.
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type customSource struct {
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config *config
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// The rules are stored in the NFD API format that is a superset of our
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// internal API and provides the functions for rule matching.
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rules []nfdv1alpha1.Rule
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}
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// Singleton source instance
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var (
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src = customSource{
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config: &config{},
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rules: []nfdv1alpha1.Rule{},
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}
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_ source.LabelSource = &src
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_ source.ConfigurableSource = &src
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)
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// Name returns the name of the feature source
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func (s *customSource) Name() string { return Name }
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// NewConfig method of the LabelSource interface
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func (s *customSource) NewConfig() source.Config { return newDefaultConfig() }
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// GetConfig method of the LabelSource interface
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func (s *customSource) GetConfig() source.Config { return s.config }
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// SetConfig method of the LabelSource interface
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func (s *customSource) SetConfig(conf source.Config) {
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switch v := conf.(type) {
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case *config:
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r := []api.Rule(*v)
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s.rules = convertInternalRulesToNfdApi(&r)
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s.config = v
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default:
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panic(fmt.Sprintf("invalid config type: %T", conf))
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}
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}
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// Priority method of the LabelSource interface
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func (s *customSource) Priority() int { return 10 }
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// GetLabels method of the LabelSource interface
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func (s *customSource) GetLabels() (source.FeatureLabels, error) {
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// Get raw features from all sources
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features := source.GetAllFeatures()
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labels := source.FeatureLabels{}
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allFeatureConfig := append(getStaticRules(), s.rules...)
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allFeatureConfig = append(allFeatureConfig, getDropinDirRules()...)
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klog.V(2).InfoS("resolving custom features", "configuration", utils.DelayedDumper(allFeatureConfig))
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// Iterate over features
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for _, rule := range allFeatureConfig {
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ruleOut, err := rule.Execute(features)
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if err != nil {
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klog.ErrorS(err, "failed to execute rule")
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continue
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}
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for n, v := range ruleOut.Labels {
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labels[n] = v
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}
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// Feed back rule output to features map for subsequent rules to match
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features.InsertAttributeFeatures(nfdv1alpha1.RuleBackrefDomain, nfdv1alpha1.RuleBackrefFeature, ruleOut.Labels)
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features.InsertAttributeFeatures(nfdv1alpha1.RuleBackrefDomain, nfdv1alpha1.RuleBackrefFeature, ruleOut.Vars)
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}
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return labels, nil
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}
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func convertInternalRulesToNfdApi(in *[]api.Rule) []nfdv1alpha1.Rule {
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out := make([]nfdv1alpha1.Rule, len(*in))
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for i := range *in {
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if err := api.ConvertRuleToV1alpha1(&(*in)[i], &out[i]); err != nil {
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klog.ErrorS(err, "FATAL: API conversion failed")
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os.Exit(255)
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}
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}
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return out
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}
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func init() {
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source.Register(&src)
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}
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