cgroups

Documentation

Index

• Constants
• func DeviceToCgroupDevice(device string) (*configs.Device, error)
• func DeviceToLinuxDevice(device string) (specs.LinuxDeviceCgroup, error)
• func EnableSystemdCgroup()
• func IsSystemdCgroup(cgroupPath string) bool
• func RenameCgroupPath(path string) (string, error)
• func UseSystemdCgroup() bool
• func ValidCgroupPath(path string, systemdCgroup bool) (string, error)
• type Config
• type Manager
  • func New(config *Config) (*Manager, error)
  • func (m *Manager) Add(pid int) error
  • func (m *Manager) AddDevice(device string) error
  • func (m *Manager) Apply() error
  • func (m *Manager) Destroy() error
  • func (m *Manager) GetCgroups() (*configs.Cgroup, error)
  • func (m *Manager) GetPaths() map[string]string
  • func (m *Manager) RemoveDevice(device string) error

Constants

const CgroupKataPrefix = "kata"

prepend a kata specific string to oci cgroup path to form a different cgroup path, thus cAdvisor couldn't find kata containers cgroup path on host to prevent it from grabbing the stats data.

const DefaultCgroupPath = "/vc"

DefaultCgroupPath runtime-determined location in the cgroups hierarchy.

Functions

func DeviceToCgroupDevice

func DeviceToCgroupDevice(device string) (*configs.Device, error)

func DeviceToLinuxDevice

func DeviceToLinuxDevice(device string) (specs.LinuxDeviceCgroup, error)

func EnableSystemdCgroup

func EnableSystemdCgroup()

func IsSystemdCgroup

func IsSystemdCgroup(cgroupPath string) bool

func RenameCgroupPath

func RenameCgroupPath(path string) (string, error)

func UseSystemdCgroup

func UseSystemdCgroup() bool

func ValidCgroupPath

func ValidCgroupPath(path string, systemdCgroup bool) (string, error)

validCgroupPath returns a valid cgroup path. see https://github.com/opencontainers/runtime-spec/blob/master/config-linux.md#cgroups-path

Types

type Config

type Config struct {
	// Cgroups specifies specific cgroup settings for the various subsystems that the container is
	// placed into to limit the resources the container has available
	// If nil, New() will create one.
	Cgroups *configs.Cgroup

	// CgroupPaths contains paths to all the cgroups setup for a container. Key is cgroup subsystem name
	// with the value as the path.
	CgroupPaths map[string]string

	// Resources represents the runtime resource constraints
	Resources specs.LinuxResources

	// CgroupPath is the OCI spec cgroup path
	CgroupPath string
}

type Manager

type Manager struct {
	sync.Mutex
	// contains filtered or unexported fields
}

func New

func New(config *Config) (*Manager, error)

New creates a new CgroupManager

func (*Manager) Add

func (m *Manager) Add(pid int) error

Add pid to cgroups

func (*Manager) AddDevice

func (m *Manager) AddDevice(device string) error

AddDevice adds a device to the device cgroup

func (*Manager) Apply

func (m *Manager) Apply() error

Apply constraints

func (*Manager) Destroy

func (m *Manager) Destroy() error

func (*Manager) GetCgroups

func (m *Manager) GetCgroups() (*configs.Cgroup, error)

func (*Manager) GetPaths

func (m *Manager) GetPaths() map[string]string

func (*Manager) RemoveDevice

func (m *Manager) RemoveDevice(device string) error

RemoceDevice removed a device from the device cgroup