/* Copyright 2020 The Kubernetes Authors. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package custom import ( "fmt" "log" "sigs.k8s.io/node-feature-discovery/source" "sigs.k8s.io/node-feature-discovery/source/custom/rules" ) // Custom Features Configurations type MatchRule struct { PciID *rules.PciIDRule `json:"pciId,omitempty"` UsbID *rules.UsbIDRule `json:"usbId,omitempty"` LoadedKMod *rules.LoadedKModRule `json:"loadedKMod,omitempty"` } type FeatureSpec struct { Name string `json:"name"` MatchOn []MatchRule `json:"matchOn"` } type NFDConfig []FeatureSpec var Config = NFDConfig{} // Implements FeatureSource Interface type Source struct{} // Return name of the feature source func (s Source) Name() string { return "custom" } // Discover features func (s Source) Discover() (source.Features, error) { features := source.Features{} allFeatureConfig := append(getStaticFeatureConfig(), Config...) log.Printf("INFO: Custom features: %+v", allFeatureConfig) // Iterate over features for _, customFeature := range allFeatureConfig { featureExist, err := s.discoverFeature(customFeature) if err != nil { return features, fmt.Errorf("failed to discover feature: %s. %s", customFeature.Name, err.Error()) } if featureExist { features[customFeature.Name] = true } } return features, nil } // Process a single feature by Matching on the defined rules. // A feature is present if all defined Rules in a MatchRule return a match. func (s Source) discoverFeature(feature FeatureSpec) (bool, error) { for _, rule := range feature.MatchOn { // PCI ID rule if rule.PciID != nil { match, err := rule.PciID.Match() if err != nil { return false, err } if !match { continue } } // USB ID rule if rule.UsbID != nil { match, err := rule.UsbID.Match() if err != nil { return false, err } if !match { continue } } // Loaded kernel module rule if rule.LoadedKMod != nil { match, err := rule.LoadedKMod.Match() if err != nil { return false, err } if !match { continue } } return true, nil } return false, nil }