| 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 |
| } |