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Published: Jan 15, 2016 License: Apache-2.0 Imports: 16 Imported by: 0



Package osl describes structures and interfaces which abstract os entities



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func GC

func GC()

GC triggers garbage collection of namespace path right away and waits for it.

func GenerateKey

func GenerateKey(containerID string) string

GenerateKey generates a sandbox key based on the passed container id.

func InitOSContext

func InitOSContext() func()

InitOSContext initializes OS context while configuring network resources


type IfaceOption

type IfaceOption func(i *nwIface)

IfaceOption is a function option type to set interface options

type IfaceOptionSetter

type IfaceOptionSetter interface {
	// Bridge returns an option setter to set if the interface is a bridge.
	Bridge(bool) IfaceOption

	// Address returns an option setter to set IPv4 address.
	Address(*net.IPNet) IfaceOption

	// Address returns an option setter to set IPv6 address.
	AddressIPv6(*net.IPNet) IfaceOption

	// Master returns an option setter to set the master interface if any for this
	// interface. The master interface name should refer to the srcname of a
	// previously added interface of type bridge.
	Master(string) IfaceOption

	// Address returns an option setter to set interface routes.
	Routes([]*net.IPNet) IfaceOption

IfaceOptionSetter interface defines the option setter methods for interface options.

type Info

type Info interface {
	// The collection of Interface previously added with the AddInterface
	// method. Note that this doesn't incude network interfaces added in any
	// other way (such as the default loopback interface which are automatically
	// created on creation of a sandbox).
	Interfaces() []Interface

	// IPv4 gateway for the sandbox.
	Gateway() net.IP

	// IPv6 gateway for the sandbox.
	GatewayIPv6() net.IP

	// Additional static routes for the sandbox.  (Note that directly
	// connected routes are stored on the particular interface they refer to.)
	StaticRoutes() []*types.StaticRoute

Info represents all possible information that the driver wants to place in the sandbox which includes interfaces, routes and gateway

type Interface

type Interface interface {
	// The name of the interface in the origin network namespace.
	SrcName() string

	// The name that will be assigned to the interface once moves inside a
	// network namespace. When the caller passes in a DstName, it is only
	// expected to pass a prefix. The name will modified with an appropriately
	// auto-generated suffix.
	DstName() string

	// IPv4 address for the interface.
	Address() *net.IPNet

	// IPv6 address for the interface.
	AddressIPv6() *net.IPNet

	// IP routes for the interface.
	Routes() []*net.IPNet

	// Bridge returns true if the interface is a bridge
	Bridge() bool

	// Master returns the srcname of the master interface for this interface.
	Master() string

	// Remove an interface from the sandbox by renaming to original name
	// and moving it out of the sandbox.
	Remove() error

	// Statistics returns the statistics for this interface
	Statistics() (*types.InterfaceStatistics, error)

Interface represents the settings and identity of a network device. It is used as a return type for Network.Link, and it is common practice for the caller to use this information when moving interface SrcName from host namespace to DstName in a different net namespace with the appropriate network settings.

type NeighOption

type NeighOption func(nh *neigh)

NeighOption is a function option type to set interface options

type NeighborOptionSetter

type NeighborOptionSetter interface {
	// LinkName returns an option setter to set the srcName of the link that should
	// be used in the neighbor entry
	LinkName(string) NeighOption

	// Family returns an option setter to set the address family for the neighbor
	// entry. eg. AF_BRIDGE
	Family(int) NeighOption

NeighborOptionSetter interfaces defines the option setter methods for interface options

type Sandbox

type Sandbox interface {
	// The path where the network namespace is mounted.
	Key() string

	// Add an existing Interface to this sandbox. The operation will rename
	// from the Interface SrcName to DstName as it moves, and reconfigure the
	// interface according to the specified settings. The caller is expected
	// to only provide a prefix for DstName. The AddInterface api will auto-generate
	// an appropriate suffix for the DstName to disambiguate.
	AddInterface(SrcName string, DstPrefix string, options ...IfaceOption) error

	// Set default IPv4 gateway for the sandbox
	SetGateway(gw net.IP) error

	// Set default IPv6 gateway for the sandbox
	SetGatewayIPv6(gw net.IP) error

	// Unset the previously set default IPv4 gateway in the sandbox
	UnsetGateway() error

	// Unset the previously set default IPv6 gateway in the sandbox
	UnsetGatewayIPv6() error

	// Add a static route to the sandbox.
	AddStaticRoute(*types.StaticRoute) error

	// Remove a static route from the sandbox.
	RemoveStaticRoute(*types.StaticRoute) error

	// AddNeighbor adds a neighbor entry into the sandbox.
	AddNeighbor(dstIP net.IP, dstMac net.HardwareAddr, option ...NeighOption) error

	// DeleteNeighbor deletes neighbor entry from the sandbox.
	DeleteNeighbor(dstIP net.IP, dstMac net.HardwareAddr) error

	// Returns an interface with methods to set neighbor options.
	NeighborOptions() NeighborOptionSetter

	// Returns an interface with methods to set interface options.
	InterfaceOptions() IfaceOptionSetter

	InvokeFunc(func()) error

	// Returns an interface with methods to get sandbox state.
	Info() Info

	// Destroy the sandbox
	Destroy() error

Sandbox represents a network sandbox, identified by a specific key. It holds a list of Interfaces, routes etc, and more can be added dynamically.

func GetSandboxForExternalKey

func GetSandboxForExternalKey(basePath string, key string) (Sandbox, error)

GetSandboxForExternalKey returns sandbox object for the supplied path

func NewSandbox

func NewSandbox(key string, osCreate bool) (Sandbox, error)

NewSandbox provides a new sandbox instance created in an os specific way provided a key which uniquely identifies the sandbox

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