// TODO: this can be improved with our driver // there has to be a better way to do this func (d *driver) GetPidsForContainer(id string) ([]int, error) { pids := []int{} subsystem := "devices" cgroupRoot, err := cgroups.FindCgroupMountpoint(subsystem) if err != nil { return pids, err } cgroupDir, err := cgroups.GetThisCgroupDir(subsystem) if err != nil { return pids, err } filename := filepath.Join(cgroupRoot, cgroupDir, id, "tasks") if _, err := os.Stat(filename); os.IsNotExist(err) { filename = filepath.Join(cgroupRoot, cgroupDir, "docker", id, "tasks") } output, err := ioutil.ReadFile(filename) if err != nil { return pids, err } for _, p := range strings.Split(string(output), "\n") { if len(p) == 0 { continue } pid, err := strconv.Atoi(p) if err != nil { return pids, fmt.Errorf("Invalid pid '%s': %s", p, err) } pids = append(pids, pid) } return pids, nil }
func (d *driver) GetPidsForContainer(id string) ([]int, error) { pids := []int{} // cpu is chosen because it is the only non optional subsystem in cgroups subsystem := "cpu" cgroupRoot, err := cgroups.FindCgroupMountpoint(subsystem) if err != nil { return pids, err } cgroupDir, err := cgroups.GetThisCgroupDir(subsystem) if err != nil { return pids, err } filename := filepath.Join(cgroupRoot, cgroupDir, id, "tasks") if _, err := os.Stat(filename); os.IsNotExist(err) { // With more recent lxc versions use, cgroup will be in lxc/ filename = filepath.Join(cgroupRoot, cgroupDir, "lxc", id, "tasks") } output, err := ioutil.ReadFile(filename) if err != nil { return pids, err } for _, p := range strings.Split(string(output), "\n") { if len(p) == 0 { continue } pid, err := strconv.Atoi(p) if err != nil { return pids, fmt.Errorf("Invalid pid '%s': %s", p, err) } pids = append(pids, pid) } return pids, nil }