// Destroy destroys the specified cgroup
func (m *cgroupManagerImpl) Destroy(cgroupConfig *CgroupConfig) error {
//cgroup name
name := cgroupConfig.Name
// Get map of all cgroup paths on the system for the particular cgroup
cgroupPaths := make(map[string]string, len(m.subsystems.MountPoints))
for key, val := range m.subsystems.MountPoints {
cgroupPaths[key] = path.Join(val, name)
}
// Initialize libcontainer's cgroup config
libcontainerCgroupConfig := &libcontainerconfigs.Cgroup{
Name: path.Base(name),
Parent: path.Dir(name),
}
fsCgroupManager := cgroupfs.Manager{
Cgroups: libcontainerCgroupConfig,
Paths: cgroupPaths,
}
// Delete cgroups using libcontainers Managers Destroy() method
if err := fsCgroupManager.Destroy(); err != nil {
return fmt.Errorf("Unable to destroy cgroup paths for cgroup %v : %v", name, err)
}
return nil
}
func (e *LinuxExecutor) destroyCgroup() error {
if e.groups == nil {
return errors.New("Can't destroy: cgroup configuration empty")
}
manager := cgroupFs.Manager{}
manager.Cgroups = e.groups
pids, err := manager.GetPids()
if err != nil {
return fmt.Errorf("Failed to get pids in the cgroup %v: %v", e.groups.Name, err)
}
errs := new(multierror.Error)
for _, pid := range pids {
process, err := os.FindProcess(pid)
if err != nil {
multierror.Append(errs, fmt.Errorf("Failed to find Pid %v: %v", pid, err))
continue
}
if err := process.Kill(); err != nil {
multierror.Append(errs, fmt.Errorf("Failed to kill Pid %v: %v", pid, err))
continue
}
if _, err := process.Wait(); err != nil {
multierror.Append(errs, fmt.Errorf("Failed to wait Pid %v: %v", pid, err))
continue
}
}
// Remove the cgroup.
if err := manager.Destroy(); err != nil {
multierror.Append(errs, fmt.Errorf("Failed to delete the cgroup directories: %v", err))
}
if len(errs.Errors) != 0 {
return fmt.Errorf("Failed to destroy cgroup: %v", errs)
}
return nil
}