cgroups

Documentation

Index

• Constants
• Variables
• func Exists(subsystem Subsystem, name string) bool
• func GetGroups() (map[Subsystem][]string, error)
• func Init() (err error)
• func Remove(subsystem Subsystem, name string) error
• type CPUSetGroup
• type DevicesGroup
• type Group
  • func Get(subsystem Subsystem, name string) (Group, error)
  • func GetGroup(subsystem Subsystem, name string) (Group, error)
• type GroupArg
• type MemoryGroup
• type Subsystem

Constants

const (
	//DevicesSubsystem device subsystem
	DevicesSubsystem = Subsystem("devices")
	//CPUSetSubsystem cpu subsystem
	CPUSetSubsystem = Subsystem("cpuset")
	//MemorySubsystem memory subsystem
	MemorySubsystem = Subsystem("memory")

	//CGroupBase base mount point
	CGroupBase = "/sys/fs/cgroup"
)

Variables

var (

	//ErrDoesNotExist does not exist error
	ErrDoesNotExist = fmt.Errorf("cgroup does not exist")
	//ErrInvalidType invalid cgroup type
	ErrInvalidType = fmt.Errorf("cgroup of invalid type")
)

Functions

func Exists

func Exists(subsystem Subsystem, name string) bool

Exists Check if a cgroup exists

func GetGroups

func GetGroups() (map[Subsystem][]string, error)

GetGroups gets all the available groups names grouped by susbsytem

func Init

func Init() (err error)

Init Initialized the cgroup subsystem

func Remove

func Remove(subsystem Subsystem, name string) error

Remove removes a cgroup

Types

type CPUSetGroup

type CPUSetGroup interface {
	Group
	Cpus(sepc string) error
	Mems(sepc string) error
	GetCpus() (string, error)
	GetMems() (string, error)
}

type DevicesGroup

type DevicesGroup interface {
	Group
	Deny(spec string) error
	Allow(spec string) error
	List() ([]string, error)
}

type Group

type Group interface {
	Name() string
	Subsystem() Subsystem
	Task(pid int) error
	Tasks() ([]int, error)
	Root() Group
	Reset()
}

Group generic cgroup interface

func Get

func Get(subsystem Subsystem, name string) (Group, error)

Get group only if it exists

func GetGroup

func GetGroup(subsystem Subsystem, name string) (Group, error)

GetGroup creaes a group if it does not exist

type GroupArg

type GroupArg struct {
	Subsystem Subsystem `json:"subsystem"`
	Name      string    `json:"name"`
}

type MemoryGroup

type MemoryGroup interface {
	Group
	Limits() (int, int, error)
	Limit(mem, swap int) error
}

type Subsystem

type Subsystem string