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node-feature-discovery/source/custom/rules/kconfig_rule.go
Markus Lehtonen 0945019161 source/kernel: implement FeatureSource
Separate feature discovery and creation of feature labels in the kernel
source.

Move kernelutils from source/internal back to the source/kernel package.
Change the kconfig custom rule to rely on the FeatureSource interface
(GetFeatures()) of the kernel source.

Also, add minimalist unit test.
2021-11-11 18:33:40 +02:00

64 lines
1.5 KiB
Go

/*
Copyright 2020-2021 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 rules
import (
"encoding/json"
"fmt"
"strings"
"sigs.k8s.io/node-feature-discovery/source"
"sigs.k8s.io/node-feature-discovery/source/kernel"
)
// KconfigRule implements Rule
type KconfigRule []kconfig
type kconfig struct {
Name string
Value string
}
func (kconfigs *KconfigRule) Match() (bool, error) {
options, ok := source.GetFeatureSource("kernel").GetFeatures().Values[kernel.ConfigFeature]
if !ok {
return false, fmt.Errorf("kernel config options not available")
}
for _, f := range *kconfigs {
if v, ok := options.Elements[f.Name]; !ok || f.Value != v {
return false, nil
}
}
return true, nil
}
func (c *kconfig) UnmarshalJSON(data []byte) error {
var raw string
if err := json.Unmarshal(data, &raw); err != nil {
return err
}
split := strings.SplitN(raw, "=", 2)
c.Name = split[0]
if len(split) == 1 {
c.Value = "true"
} else {
c.Value = split[1]
}
return nil
}