cgroup

Documentation

Overview

Package cgroup provides utilities for linux devices cgroups

Index

• func DirPath() (string, error)
• type Cgroup
  • func NewCgroups(pathPattern string) (cgroups []*Cgroup, err error)
  • func NewFakeCgroup(ctx context.Context, path string) (*Cgroup, error)
  • func NewFakeWideCgroup(ctx context.Context, path string) (*Cgroup, error)
  • func (c *Cgroup) Allow(major, minor uint32) error
  • func (c *Cgroup) Deny(major, minor uint32) error
  • func (c *Cgroup) IsAllowed(major, minor uint32) (bool, error)
  • func (c *Cgroup) IsWiderThan(major, minor uint32) (bool, error)

Functions

func DirPath

func DirPath() (string, error)

DirPath returns cgroup dir path pattern matching all pod containers

Types

type Cgroup

type Cgroup struct {
	Path string
}

Cgroup represents linux devices cgroup

func NewCgroups

func NewCgroups(pathPattern string) (cgroups []*Cgroup, err error)

NewCgroups returns all cgroups matching pathPattern

func NewFakeCgroup

func NewFakeCgroup(ctx context.Context, path string) (*Cgroup, error)

NewFakeCgroup creates and returns a new cgroup for testing with some k8s default devices allowed.

func NewFakeWideCgroup

func NewFakeWideCgroup(ctx context.Context, path string) (*Cgroup, error)

NewFakeWideCgroup creates and returns a new cgroup for testing with "a *:* rwm" allowed

func (*Cgroup) Allow

func (c *Cgroup) Allow(major, minor uint32) error

Allow allows "c major:minor rwm" for cgroup

func (*Cgroup) Deny

func (c *Cgroup) Deny(major, minor uint32) error

Deny denies "c major:minor rw" for cgroup

func (*Cgroup) IsAllowed

func (c *Cgroup) IsAllowed(major, minor uint32) (bool, error)

IsAllowed returns if "c major:minor rwm" is allowed for cgroup

func (*Cgroup) IsWiderThan

func (c *Cgroup) IsWiderThan(major, minor uint32) (bool, error)

IsWiderThan returns if cgroup allows wider device group than "c major:minor rwm":

• "a *:minor rwm"
• "a major:* rwm"
• "a *:* rwm"
• "c *:minor rwm"
• "c major:* rwm"
• "c *:* rwm"