mirror of https://github.com/k3s-io/k3s
86 lines
2.0 KiB
Go
86 lines
2.0 KiB
Go
/*
|
|
Copyright The containerd 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 cgroups
|
|
|
|
import (
|
|
"io/ioutil"
|
|
"os"
|
|
"path/filepath"
|
|
"strconv"
|
|
"strings"
|
|
|
|
specs "github.com/opencontainers/runtime-spec/specs-go"
|
|
)
|
|
|
|
func NewPids(root string) *pidsController {
|
|
return &pidsController{
|
|
root: filepath.Join(root, string(Pids)),
|
|
}
|
|
}
|
|
|
|
type pidsController struct {
|
|
root string
|
|
}
|
|
|
|
func (p *pidsController) Name() Name {
|
|
return Pids
|
|
}
|
|
|
|
func (p *pidsController) Path(path string) string {
|
|
return filepath.Join(p.root, path)
|
|
}
|
|
|
|
func (p *pidsController) Create(path string, resources *specs.LinuxResources) error {
|
|
if err := os.MkdirAll(p.Path(path), defaultDirPerm); err != nil {
|
|
return err
|
|
}
|
|
if resources.Pids != nil && resources.Pids.Limit > 0 {
|
|
return ioutil.WriteFile(
|
|
filepath.Join(p.Path(path), "pids.max"),
|
|
[]byte(strconv.FormatInt(resources.Pids.Limit, 10)),
|
|
defaultFilePerm,
|
|
)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (p *pidsController) Update(path string, resources *specs.LinuxResources) error {
|
|
return p.Create(path, resources)
|
|
}
|
|
|
|
func (p *pidsController) Stat(path string, stats *Metrics) error {
|
|
current, err := readUint(filepath.Join(p.Path(path), "pids.current"))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
var max uint64
|
|
maxData, err := ioutil.ReadFile(filepath.Join(p.Path(path), "pids.max"))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if maxS := strings.TrimSpace(string(maxData)); maxS != "max" {
|
|
if max, err = parseUint(maxS, 10, 64); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
stats.Pids = &PidsStat{
|
|
Current: current,
|
|
Limit: max,
|
|
}
|
|
return nil
|
|
}
|