mirror of
https://github.com/kubernetes-sigs/node-feature-discovery.git
synced 2025-03-16 21:38:23 +00:00
e4e3a9f68e
- Implement the 'custom' feature source utilizing the
match rules implemented in previous commit.
- Add a static custom feature list for:
1. rdma.capable - marks a node where devices that support
RDMA are present.
2. rdma.enabled - marks a node where rdma modules have
been loaded.
A user may extend these features with additional match rules via
NFD configuration file.
61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
/*
|
|
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 rules
|
|
|
|
import (
|
|
"fmt"
|
|
"io/ioutil"
|
|
"strings"
|
|
)
|
|
|
|
// Rule that matches on loaded kernel modules in the system
|
|
type LoadedKModRule []string
|
|
|
|
const kmodProcfsPath = "/proc/modules"
|
|
|
|
// Match loaded kernel modules on provided list of kernel modules
|
|
func (kmods *LoadedKModRule) Match() (bool, error) {
|
|
loadedModules, err := kmods.getLoadedModules()
|
|
if err != nil {
|
|
return false, fmt.Errorf("failed to get loaded kernel modules. %s", err.Error())
|
|
}
|
|
for _, kmod := range *kmods {
|
|
if _, ok := loadedModules[kmod]; !ok {
|
|
// kernel module not loaded
|
|
return false, nil
|
|
}
|
|
}
|
|
return true, nil
|
|
}
|
|
|
|
func (kmods *LoadedKModRule) getLoadedModules() (map[string]struct{}, error) {
|
|
out, err := ioutil.ReadFile(kmodProcfsPath)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to read file %s: %s", kmodProcfsPath, err.Error())
|
|
}
|
|
|
|
loadedMods := make(map[string]struct{})
|
|
for _, line := range strings.Split(string(out), "\n") {
|
|
// skip empty lines
|
|
if len(line) == 0 {
|
|
continue
|
|
}
|
|
// append loaded module
|
|
loadedMods[strings.Fields(line)[0]] = struct{}{}
|
|
}
|
|
return loadedMods, nil
|
|
}
|