cgroups

Documentation

Index

• func EnterPid(cgroupPaths map[string]string, pid int) error
• func FindCgroupMountpoint(subsystem string) (string, error)
• func GetAllSubsystems() ([]string, error)
• func GetInitCgroupDir(subsystem string) (string, error)
• func GetThisCgroupDir(subsystem string) (string, error)
• func IsNotFound(err error) bool
• func NewNotFoundError(sub string) error
• func ParseCgroupFile(subsystem string, r io.Reader) (string, error)
• func ReadProcsFile(dir string) ([]int, error)
• type ActiveCgroup
• type Cgroup
• type FreezerState
• type Mount
  • func GetCgroupMounts() ([]Mount, error)
  • func (m Mount) GetThisCgroupDir() (string, error)
• type NotFoundError
  • func (e *NotFoundError) Error() string

Functions

func EnterPid

func EnterPid(cgroupPaths map[string]string, pid int) error

func FindCgroupMountpoint

func FindCgroupMountpoint(subsystem string) (string, error)

https://www.kernel.org/doc/Documentation/cgroups/cgroups.txt

func GetAllSubsystems

func GetAllSubsystems() ([]string, error)

Returns all the cgroup subsystems supported by the kernel

func GetInitCgroupDir

func GetInitCgroupDir(subsystem string) (string, error)

func GetThisCgroupDir

func GetThisCgroupDir(subsystem string) (string, error)

Returns the relative path to the cgroup docker is running in.

func IsNotFound

func IsNotFound(err error) bool

func NewNotFoundError

func NewNotFoundError(sub string) error

func ParseCgroupFile

func ParseCgroupFile(subsystem string, r io.Reader) (string, error)

func ReadProcsFile

func ReadProcsFile(dir string) ([]int, error)

Types

type ActiveCgroup

type ActiveCgroup interface {
	Cleanup() error
	Paths() (map[string]string, error)
}

type Cgroup

type Cgroup struct {
	Name   string `json:"name,omitempty"`
	Parent string `json:"parent,omitempty"` // name of parent cgroup or slice

	AllowAllDevices   bool              `json:"allow_all_devices,omitempty"` // If this is true allow access to any kind of device within the container.  If false, allow access only to devices explicitly listed in the allowed_devices list.
	AllowedDevices    []*devices.Device `json:"allowed_devices,omitempty"`
	Memory            int64             `json:"memory,omitempty"`             // Memory limit (in bytes)
	MemoryReservation int64             `json:"memory_reservation,omitempty"` // Memory reservation or soft_limit (in bytes)
	MemorySwap        int64             `json:"memory_swap,omitempty"`        // Total memory usage (memory + swap); set `-1' to disable swap
	CpuShares         int64             `json:"cpu_shares,omitempty"`         // CPU shares (relative weight vs. other containers)
	CpuQuota          int64             `json:"cpu_quota,omitempty"`          // CPU hardcap limit (in usecs). Allowed cpu time in a given period.
	CpuPeriod         int64             `json:"cpu_period,omitempty"`         // CPU period to be used for hardcapping (in usecs). 0 to use system default.
	CpusetCpus        string            `json:"cpuset_cpus,omitempty"`        // CPU to use
	Freezer           FreezerState      `json:"freezer,omitempty"`            // set the freeze value for the process
	Slice             string            `json:"slice,omitempty"`              // Parent slice to use for systemd
}

type FreezerState

type FreezerState string

const (
	Undefined FreezerState = ""
	Frozen    FreezerState = "FROZEN"
	Thawed    FreezerState = "THAWED"
)

type Mount

type Mount struct {
	Mountpoint string
	Subsystems []string
}

func GetCgroupMounts

func GetCgroupMounts() ([]Mount, error)

func (Mount) GetThisCgroupDir

func (m Mount) GetThisCgroupDir() (string, error)

type NotFoundError

type NotFoundError struct {
	Subsystem string
}

func (*NotFoundError) Error

func (e *NotFoundError) Error() string