libnetwork

package
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 Go to latest Published: Dec 10, 2021 License: Apache-2.0, Apache-2.0 Imports: 71 Imported by: 0

README

libnetwork - networking for containers

Libnetwork provides a native Go implementation for connecting containers

The goal of libnetwork is to deliver a robust Container Network Model that provides a consistent programming interface and the required network abstractions for applications.

Design

Please refer to the design for more information.

Using libnetwork

There are many networking solutions available to suit a broad range of use-cases. libnetwork uses a driver / plugin model to support all of these solutions while abstracting the complexity of the driver implementations by exposing a simple and consistent Network Model to users.

package main

import (
	"fmt"
	"log"

	"github.com/docker/docker/pkg/reexec"
	"github.com/docker/docker/libnetwork"
	"github.com/docker/docker/libnetwork/config"
	"github.com/docker/docker/libnetwork/netlabel"
	"github.com/docker/docker/libnetwork/options"
)

func main() {
	if reexec.Init() {
		return
	}

	// Select and configure the network driver
	networkType := "bridge"

	// Create a new controller instance
	driverOptions := options.Generic{}
	genericOption := make(map[string]interface{})
	genericOption[netlabel.GenericData] = driverOptions
	controller, err := libnetwork.New(config.OptionDriverConfig(networkType, genericOption))
	if err != nil {
		log.Fatalf("libnetwork.New: %s", err)
	}

	// Create a network for containers to join.
	// NewNetwork accepts Variadic optional arguments that libnetwork and Drivers can use.
	network, err := controller.NewNetwork(networkType, "network1", "")
	if err != nil {
		log.Fatalf("controller.NewNetwork: %s", err)
	}

	// For each new container: allocate IP and interfaces. The returned network
	// settings will be used for container infos (inspect and such), as well as
	// iptables rules for port publishing. This info is contained or accessible
	// from the returned endpoint.
	ep, err := network.CreateEndpoint("Endpoint1")
	if err != nil {
		log.Fatalf("network.CreateEndpoint: %s", err)
	}

	// Create the sandbox for the container.
	// NewSandbox accepts Variadic optional arguments which libnetwork can use.
	sbx, err := controller.NewSandbox("container1",
		libnetwork.OptionHostname("test"),
		libnetwork.OptionDomainname("docker.io"))
	if err != nil {
		log.Fatalf("controller.NewSandbox: %s", err)
	}

	// A sandbox can join the endpoint via the join api.
	err = ep.Join(sbx)
	if err != nil {
		log.Fatalf("ep.Join: %s", err)
	}

	// libnetwork client can check the endpoint's operational data via the Info() API
	epInfo, err := ep.DriverInfo()
	if err != nil {
		log.Fatalf("ep.DriverInfo: %s", err)
	}

	macAddress, ok := epInfo[netlabel.MacAddress]
	if !ok {
		log.Fatalf("failed to get mac address from endpoint info")
	}

	fmt.Printf("Joined endpoint %s (%s) to sandbox %s (%s)\n", ep.Name(), macAddress, sbx.ContainerID(), sbx.Key())
}

Contributing

Want to hack on libnetwork? Docker's contributions guidelines apply.

Code and documentation copyright 2015 Docker, inc. Code released under the Apache 2.0 license. Docs released under Creative commons.

Documentation

Overview 

Package libnetwork is a generated protocol buffer package.

It is generated from these files:
	agent.proto

It has these top-level messages:
	EndpointRecord
	PortConfig

Package libnetwork provides the basic functionality and extension points to create network namespaces and allocate interfaces for containers to use. 

networkType := "bridge"

// Create a new controller instance
driverOptions := options.Generic{}
genericOption := make(map[string]interface{})
genericOption[netlabel.GenericData] = driverOptions
controller, err := libnetwork.New(config.OptionDriverConfig(networkType, genericOption))
if err != nil {
	return
}

// Create a network for containers to join.
// NewNetwork accepts Variadic optional arguments that libnetwork and Drivers can make use of
network, err := controller.NewNetwork(networkType, "network1", "")
if err != nil {
	return
}

// For each new container: allocate IP and interfaces. The returned network
// settings will be used for container infos (inspect and such), as well as
// iptables rules for port publishing. This info is contained or accessible
// from the returned endpoint.
ep, err := network.CreateEndpoint("Endpoint1")
if err != nil {
	return
}

// Create the sandbox for the container.
// NewSandbox accepts Variadic optional arguments which libnetwork can use.
sbx, err := controller.NewSandbox("container1",
	libnetwork.OptionHostname("test"),
	libnetwork.OptionDomainname("docker.io"))

// A sandbox can join the endpoint via the join api.
err = ep.Join(sbx)
if err != nil {
	return
}

Index

Constants

This section is empty.

Variables

View Source 
var (
	ErrInvalidLengthAgent = fmt.Errorf("proto: negative length found during unmarshaling")
	ErrIntOverflowAgent   = fmt.Errorf("proto: integer overflow")
)
View Source 
var PortConfig_Protocol_name = map[int32]string{
	0: "TCP",
	1: "UDP",
	2: "SCTP",
}
View Source 
var PortConfig_Protocol_value = map[string]int32{
	"TCP":  0,
	"UDP":  1,
	"SCTP": 2,
}

Functions

func NetworkDeleteOptionRemoveLB 

func NetworkDeleteOptionRemoveLB(p *networkDeleteParams)

NetworkDeleteOptionRemoveLB informs a network.Delete() operation that should remove the load balancer endpoint for this network. Note that the Delete() method will automatically remove a load balancing endpoint for most networks when the network is otherwise empty. However, this does not occur for some networks. In particular, networks marked as ingress (which are supposed to be more permanent than other overlay networks) won't automatically remove the LB endpoint on Delete(). This method allows for explicit removal of such networks provided there are no other endpoints present in the network. If the network still has non-LB endpoints present, Delete() will not remove the LB endpoint and will return an error.

func SetExternalKey 

func SetExternalKey(shortCtlrID string, containerID string, key string, execRoot string) error

SetExternalKey provides a convenient way to set an External key to a sandbox

Types

type ActiveContainerError 

type ActiveContainerError struct {
	// contains filtered or unexported fields
}

ActiveContainerError is returned when an endpoint is deleted which has active containers attached to it.

func (*ActiveContainerError) Error 

func (ace *ActiveContainerError) Error() string

func (*ActiveContainerError) Forbidden 

func (ace *ActiveContainerError) Forbidden()

Forbidden denotes the type of this error

type ActiveEndpointsError 

type ActiveEndpointsError struct {
	// contains filtered or unexported fields
}

ActiveEndpointsError is returned when a network is deleted which has active endpoints in it.

func (*ActiveEndpointsError) Error 

func (aee *ActiveEndpointsError) Error() string

func (*ActiveEndpointsError) Forbidden 

func (aee *ActiveEndpointsError) Forbidden()

Forbidden denotes the type of this error

type ByTime 

type ByTime []*types.EncryptionKey

ByTime implements sort.Interface for []*types.EncryptionKey based on the LamportTime field.

func (ByTime) Len 

func (b ByTime) Len() int

func (ByTime) Less 

func (b ByTime) Less(i, j int) bool

func (ByTime) Swap 

func (b ByTime) Swap(i, j int)

type DNSBackend 

type DNSBackend interface {
	// ResolveName resolves a service name to an IPv4 or IPv6 address by searching
	// the networks the sandbox is connected to. For IPv6 queries, second return
	// value will be true if the name exists in docker domain but doesn't have an
	// IPv6 address. Such queries shouldn't be forwarded to external nameservers.
	ResolveName(name string, iplen int) ([]net.IP, bool)
	// ResolveIP returns the service name for the passed in IP. IP is in reverse dotted
	// notation; the format used for DNS PTR records
	ResolveIP(name string) string
	// ResolveService returns all the backend details about the containers or hosts
	// backing a service. Its purpose is to satisfy an SRV query
	ResolveService(name string) ([]*net.SRV, []net.IP)
	// ExecFunc allows a function to be executed in the context of the backend
	// on behalf of the resolver.
	ExecFunc(f func()) error
	// NdotsSet queries the backends ndots dns option settings
	NdotsSet() bool
	// HandleQueryResp passes the name & IP from a response to the backend. backend
	// can use it to maintain any required state about the resolution
	HandleQueryResp(name string, ip net.IP)
}

DNSBackend represents a backend DNS resolver used for DNS name resolution. All the queries to the resolver are forwarded to the backend resolver.

type Endpoint 

type Endpoint interface {
	// A system generated id for this endpoint.
	ID() string

	// Name returns the name of this endpoint.
	Name() string

	// Network returns the name of the network to which this endpoint is attached.
	Network() string

	// Join joins the sandbox to the endpoint and populates into the sandbox
	// the network resources allocated for the endpoint.
	Join(sandbox Sandbox, options ...EndpointOption) error

	// Leave detaches the network resources populated in the sandbox.
	Leave(sandbox Sandbox, options ...EndpointOption) error

	// Return certain operational data belonging to this endpoint
	Info() EndpointInfo

	// DriverInfo returns a collection of driver operational data related to this endpoint retrieved from the driver
	DriverInfo() (map[string]interface{}, error)

	// Delete and detaches this endpoint from the network.
	Delete(force bool) error
}

Endpoint represents a logical connection between a network and a sandbox.

type EndpointInfo 

type EndpointInfo interface {
	// Iface returns InterfaceInfo, go interface that can be used
	// to get more information on the interface which was assigned to
	// the endpoint by the driver. This can be used after the
	// endpoint has been created.
	Iface() InterfaceInfo

	// Gateway returns the IPv4 gateway assigned by the driver.
	// This will only return a valid value if a container has joined the endpoint.
	Gateway() net.IP

	// GatewayIPv6 returns the IPv6 gateway assigned by the driver.
	// This will only return a valid value if a container has joined the endpoint.
	GatewayIPv6() net.IP

	// StaticRoutes returns the list of static routes configured by the network
	// driver when the container joins a network
	StaticRoutes() []*types.StaticRoute

	// Sandbox returns the attached sandbox if there, nil otherwise.
	Sandbox() Sandbox

	// LoadBalancer returns whether the endpoint is the load balancer endpoint for the network.
	LoadBalancer() bool
}

EndpointInfo provides an interface to retrieve network resources bound to the endpoint.

type EndpointOption 

type EndpointOption func(ep *endpoint)

EndpointOption is an option setter function type used to pass various options to Network and Endpoint interfaces methods. The various setter functions of type EndpointOption are provided by libnetwork, they look like <Create|Join|Leave>Option[...](...)

func CreateOptionAlias 

func CreateOptionAlias(name string, alias string) EndpointOption

CreateOptionAlias function returns an option setter for setting endpoint alias

func CreateOptionAnonymous 

func CreateOptionAnonymous() EndpointOption

CreateOptionAnonymous function returns an option setter for setting this endpoint as anonymous

func CreateOptionDNS 

func CreateOptionDNS(dns []string) EndpointOption

CreateOptionDNS function returns an option setter for dns entry option to be passed to container Create method.

func CreateOptionDisableResolution 

func CreateOptionDisableResolution() EndpointOption

CreateOptionDisableResolution function returns an option setter to indicate this endpoint doesn't want embedded DNS server functionality

func CreateOptionExposedPorts 

func CreateOptionExposedPorts(exposedPorts []types.TransportPort) EndpointOption

CreateOptionExposedPorts function returns an option setter for the container exposed ports option to be passed to network.CreateEndpoint() method.

func CreateOptionIpam 

func CreateOptionIpam(ipV4, ipV6 net.IP, llIPs []net.IP, ipamOptions map[string]string) EndpointOption

CreateOptionIpam function returns an option setter for the ipam configuration for this endpoint

func CreateOptionLoadBalancer 

func CreateOptionLoadBalancer() EndpointOption

CreateOptionLoadBalancer function returns an option setter for denoting the endpoint is a load balancer for a network

func CreateOptionMyAlias 

func CreateOptionMyAlias(alias string) EndpointOption

CreateOptionMyAlias function returns an option setter for setting endpoint's self alias

func CreateOptionPortMapping 

func CreateOptionPortMapping(portBindings []types.PortBinding) EndpointOption

CreateOptionPortMapping function returns an option setter for the mapping ports option to be passed to network.CreateEndpoint() method.

func CreateOptionService 

func CreateOptionService(name, id string, vip net.IP, ingressPorts []*PortConfig, aliases []string) EndpointOption

CreateOptionService function returns an option setter for setting service binding configuration

func EndpointOptionGeneric 

func EndpointOptionGeneric(generic map[string]interface{}) EndpointOption

EndpointOptionGeneric function returns an option setter for a Generic option defined in a Dictionary of Key-Value pair

func JoinOptionPriority 

func JoinOptionPriority(prio int) EndpointOption

JoinOptionPriority function returns an option setter for priority option to be passed to the endpoint.Join() method.

type EndpointRecord 

type EndpointRecord struct {
	// Name of the container
	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
	// Service name of the service to which this endpoint belongs.
	ServiceName string `protobuf:"bytes,2,opt,name=service_name,json=serviceName,proto3" json:"service_name,omitempty"`
	// Service ID of the service to which this endpoint belongs.
	ServiceID string `protobuf:"bytes,3,opt,name=service_id,json=serviceId,proto3" json:"service_id,omitempty"`
	// Virtual IP of the service to which this endpoint belongs.
	VirtualIP string `protobuf:"bytes,4,opt,name=virtual_ip,json=virtualIp,proto3" json:"virtual_ip,omitempty"`
	// IP assigned to this endpoint.
	EndpointIP string `protobuf:"bytes,5,opt,name=endpoint_ip,json=endpointIp,proto3" json:"endpoint_ip,omitempty"`
	// IngressPorts exposed by the service to which this endpoint belongs.
	IngressPorts []*PortConfig `protobuf:"bytes,6,rep,name=ingress_ports,json=ingressPorts" json:"ingress_ports,omitempty"`
	// A list of aliases which are alternate names for the service
	Aliases []string `protobuf:"bytes,7,rep,name=aliases" json:"aliases,omitempty"`
	// List of aliases task specific aliases
	TaskAliases []string `protobuf:"bytes,8,rep,name=task_aliases,json=taskAliases" json:"task_aliases,omitempty"`
	// Whether this enpoint's service has been disabled
	ServiceDisabled bool `protobuf:"varint,9,opt,name=service_disabled,json=serviceDisabled,proto3" json:"service_disabled,omitempty"`
}

EndpointRecord specifies all the endpoint specific information that needs to gossiped to nodes participating in the network.

func (*EndpointRecord) Descriptor 

func (*EndpointRecord) Descriptor() ([]byte, []int)

func (*EndpointRecord) GetAliases 

func (m *EndpointRecord) GetAliases() []string

func (*EndpointRecord) GetEndpointIP 

func (m *EndpointRecord) GetEndpointIP() string

func (*EndpointRecord) GetIngressPorts 

func (m *EndpointRecord) GetIngressPorts() []*PortConfig

func (*EndpointRecord) GetName 

func (m *EndpointRecord) GetName() string

func (*EndpointRecord) GetServiceDisabled 

func (m *EndpointRecord) GetServiceDisabled() bool

func (*EndpointRecord) GetServiceID 

func (m *EndpointRecord) GetServiceID() string

func (*EndpointRecord) GetServiceName 

func (m *EndpointRecord) GetServiceName() string

func (*EndpointRecord) GetTaskAliases 

func (m *EndpointRecord) GetTaskAliases() []string

func (*EndpointRecord) GetVirtualIP 

func (m *EndpointRecord) GetVirtualIP() string

func (*EndpointRecord) GoString 

func (this *EndpointRecord) GoString() string

func (*EndpointRecord) Marshal 

func (m *EndpointRecord) Marshal() (dAtA []byte, err error)

func (*EndpointRecord) MarshalTo 

func (m *EndpointRecord) MarshalTo(dAtA []byte) (int, error)

func (*EndpointRecord) ProtoMessage 

func (*EndpointRecord) ProtoMessage()

func (*EndpointRecord) Reset 

func (m *EndpointRecord) Reset()

func (*EndpointRecord) Size 

func (m *EndpointRecord) Size() (n int)

func (*EndpointRecord) String 

func (this *EndpointRecord) String() string

func (*EndpointRecord) Unmarshal 

func (m *EndpointRecord) Unmarshal(dAtA []byte) error

type EndpointWalker 

type EndpointWalker func(ep Endpoint) bool

EndpointWalker is a client provided function which will be used to walk the Endpoints. When the function returns true, the walk will stop.

type ErrDataStoreNotInitialized 

type ErrDataStoreNotInitialized string

ErrDataStoreNotInitialized is returned if an invalid data scope is passed for getting data store

func (ErrDataStoreNotInitialized) Error 

func (dsni ErrDataStoreNotInitialized) Error() string

type ErrInvalidConfigFile 

type ErrInvalidConfigFile string

ErrInvalidConfigFile type is returned when an invalid LibNetwork config file is detected

func (ErrInvalidConfigFile) Error 

func (cf ErrInvalidConfigFile) Error() string

type ErrInvalidID 

type ErrInvalidID string

ErrInvalidID is returned when a query-by-id method is being invoked with an empty id parameter

func (ErrInvalidID) BadRequest 

func (ii ErrInvalidID) BadRequest()

BadRequest denotes the type of this error

func (ErrInvalidID) Error 

func (ii ErrInvalidID) Error() string

type ErrInvalidJoin 

type ErrInvalidJoin struct{}

ErrInvalidJoin is returned if a join is attempted on an endpoint which already has a container joined.

func (ErrInvalidJoin) BadRequest 

func (ij ErrInvalidJoin) BadRequest()

BadRequest denotes the type of this error

func (ErrInvalidJoin) Error 

func (ij ErrInvalidJoin) Error() string

type ErrInvalidName 

type ErrInvalidName string

ErrInvalidName is returned when a query-by-name or resource create method is invoked with an empty name parameter

func (ErrInvalidName) BadRequest 

func (in ErrInvalidName) BadRequest()

BadRequest denotes the type of this error

func (ErrInvalidName) Error 

func (in ErrInvalidName) Error() string

type ErrInvalidNetworkDriver 

type ErrInvalidNetworkDriver string

ErrInvalidNetworkDriver is returned if an invalid driver name is passed.

func (ErrInvalidNetworkDriver) BadRequest 

func (ind ErrInvalidNetworkDriver) BadRequest()

BadRequest denotes the type of this error

func (ErrInvalidNetworkDriver) Error 

func (ind ErrInvalidNetworkDriver) Error() string

type ErrNoContainer 

type ErrNoContainer struct{}

ErrNoContainer is returned when the endpoint has no container attached to it.

func (ErrNoContainer) Error 

func (nc ErrNoContainer) Error() string

func (ErrNoContainer) Maskable 

func (nc ErrNoContainer) Maskable()

Maskable denotes the type of this error

type ErrNoSuchEndpoint 

type ErrNoSuchEndpoint string

ErrNoSuchEndpoint is returned when an endpoint query finds no result

func (ErrNoSuchEndpoint) Error 

func (nse ErrNoSuchEndpoint) Error() string

func (ErrNoSuchEndpoint) NotFound 

func (nse ErrNoSuchEndpoint) NotFound()

NotFound denotes the type of this error

type ErrNoSuchNetwork 

type ErrNoSuchNetwork string

ErrNoSuchNetwork is returned when a network query finds no result

func (ErrNoSuchNetwork) Error 

func (nsn ErrNoSuchNetwork) Error() string

func (ErrNoSuchNetwork) NotFound 

func (nsn ErrNoSuchNetwork) NotFound()

NotFound denotes the type of this error

type InterfaceInfo 

type InterfaceInfo interface {
	// MacAddress returns the MAC address assigned to the endpoint.
	MacAddress() net.HardwareAddr

	// Address returns the IPv4 address assigned to the endpoint.
	Address() *net.IPNet

	// AddressIPv6 returns the IPv6 address assigned to the endpoint.
	AddressIPv6() *net.IPNet

	// LinkLocalAddresses returns the list of link-local (IPv4/IPv6) addresses assigned to the endpoint.
	LinkLocalAddresses() []*net.IPNet

	// SrcName returns the name of the interface w/in the container
	SrcName() string
}

InterfaceInfo provides an interface to retrieve interface addresses bound to the endpoint.

type InvalidContainerIDError 

type InvalidContainerIDError string

InvalidContainerIDError is returned when an invalid container id is passed in Join/Leave

func (InvalidContainerIDError) BadRequest 

func (id InvalidContainerIDError) BadRequest()

BadRequest denotes the type of this error

func (InvalidContainerIDError) Error 

func (id InvalidContainerIDError) Error() string

type IpamConf 

type IpamConf struct {
	// PreferredPool is the master address pool for containers and network interfaces.
	PreferredPool string
	// SubPool is a subset of the master pool. If specified,
	// this becomes the container pool.
	SubPool string
	// Gateway is the preferred Network Gateway address (optional).
	Gateway string
	// AuxAddresses contains auxiliary addresses for network driver. Must be within the master pool.
	// libnetwork will reserve them if they fall into the container pool.
	AuxAddresses map[string]string
}

IpamConf contains all the ipam related configurations for a network

func (*IpamConf) CopyTo 

func (c *IpamConf) CopyTo(dstC *IpamConf) error

CopyTo deep copies to the destination IpamConfig

func (*IpamConf) Validate 

func (c *IpamConf) Validate() error

Validate checks whether the configuration is valid

type IpamInfo 

type IpamInfo struct {
	PoolID string
	Meta   map[string]string
	driverapi.IPAMData
}

IpamInfo contains all the ipam related operational info for a network

func (*IpamInfo) CopyTo 

func (i *IpamInfo) CopyTo(dstI *IpamInfo) error

CopyTo deep copies to the destination IpamInfo

func (*IpamInfo) MarshalJSON 

func (i *IpamInfo) MarshalJSON() ([]byte, error)

MarshalJSON encodes IpamInfo into json message

func (*IpamInfo) UnmarshalJSON 

func (i *IpamInfo) UnmarshalJSON(data []byte) error

UnmarshalJSON decodes json message into PoolData

type ManagerRedirectError 

type ManagerRedirectError string

ManagerRedirectError is returned when the request should be redirected to Manager

func (ManagerRedirectError) Error 

func (mr ManagerRedirectError) Error() string

func (ManagerRedirectError) Maskable 

func (mr ManagerRedirectError) Maskable()

Maskable denotes the type of this error

type Network 

type Network interface {
	// Name returns a user chosen name for this network.
	Name() string

	// ID returns a system generated id for this network.
	ID() string

	// Type returns the type of network, which corresponds to its managing driver.
	Type() string

	// CreateEndpoint creates a new endpoint to this network symbolically identified by the
	// specified unique name. The options parameter carries driver specific options.
	CreateEndpoint(name string, options ...EndpointOption) (Endpoint, error)

	// Delete the network.
	Delete(options ...NetworkDeleteOption) error

	// Endpoints returns the list of Endpoint(s) in this network.
	Endpoints() []Endpoint

	// WalkEndpoints uses the provided function to walk the Endpoints.
	WalkEndpoints(walker EndpointWalker)

	// EndpointByName returns the Endpoint which has the passed name. If not found, the error ErrNoSuchEndpoint is returned.
	EndpointByName(name string) (Endpoint, error)

	// EndpointByID returns the Endpoint which has the passed id. If not found, the error ErrNoSuchEndpoint is returned.
	EndpointByID(id string) (Endpoint, error)

	// Info returns certain operational data belonging to this network.
	Info() NetworkInfo
}

A Network represents a logical connectivity zone that containers may join using the Link method. A Network is managed by a specific driver.

type NetworkController 

type NetworkController interface {
	// ID provides a unique identity for the controller
	ID() string

	// BuiltinDrivers returns list of builtin drivers
	BuiltinDrivers() []string

	// BuiltinIPAMDrivers returns list of builtin ipam drivers
	BuiltinIPAMDrivers() []string

	// Config method returns the bootup configuration for the controller
	Config() config.Config

	// Create a new network. The options parameter carries network specific options.
	NewNetwork(networkType, name string, id string, options ...NetworkOption) (Network, error)

	// Networks returns the list of Network(s) managed by this controller.
	Networks() []Network

	// WalkNetworks uses the provided function to walk the Network(s) managed by this controller.
	WalkNetworks(walker NetworkWalker)

	// NetworkByName returns the Network which has the passed name. If not found, the error ErrNoSuchNetwork is returned.
	NetworkByName(name string) (Network, error)

	// NetworkByID returns the Network which has the passed id. If not found, the error ErrNoSuchNetwork is returned.
	NetworkByID(id string) (Network, error)

	// NewSandbox creates a new network sandbox for the passed container id
	NewSandbox(containerID string, options ...SandboxOption) (Sandbox, error)

	// Sandboxes returns the list of Sandbox(s) managed by this controller.
	Sandboxes() []Sandbox

	// WalkSandboxes uses the provided function to walk the Sandbox(s) managed by this controller.
	WalkSandboxes(walker SandboxWalker)

	// SandboxByID returns the Sandbox which has the passed id. If not found, a types.NotFoundError is returned.
	SandboxByID(id string) (Sandbox, error)

	// SandboxDestroy destroys a sandbox given a container ID
	SandboxDestroy(id string) error

	// Stop network controller
	Stop()

	// ReloadConfiguration updates the controller configuration
	ReloadConfiguration(cfgOptions ...config.Option) error

	// SetClusterProvider sets cluster provider
	SetClusterProvider(provider cluster.Provider)

	// Wait for agent initialization complete in libnetwork controller
	AgentInitWait()

	// Wait for agent to stop if running
	AgentStopWait()

	// SetKeys configures the encryption key for gossip and overlay data path
	SetKeys(keys []*types.EncryptionKey) error

	// StartDiagnostic start the network diagnostic mode
	StartDiagnostic(port int)
	// StopDiagnostic start the network diagnostic mode
	StopDiagnostic()
	// IsDiagnosticEnabled returns true if the diagnostic is enabled
	IsDiagnosticEnabled() bool
}

NetworkController provides the interface for controller instance which manages networks.

func New 

func New(cfgOptions ...config.Option) (NetworkController, error)

New creates a new instance of network controller.

type NetworkDeleteOption 

type NetworkDeleteOption func(p *networkDeleteParams)

NetworkDeleteOption is a type for optional parameters to pass to the network.Delete() function.

type NetworkInfo 

type NetworkInfo interface {
	IpamConfig() (string, map[string]string, []*IpamConf, []*IpamConf)
	IpamInfo() ([]*IpamInfo, []*IpamInfo)
	DriverOptions() map[string]string
	Scope() string
	IPv6Enabled() bool
	Internal() bool
	Attachable() bool
	Ingress() bool
	ConfigFrom() string
	ConfigOnly() bool
	Labels() map[string]string
	Dynamic() bool
	Created() time.Time
	// Peers returns a slice of PeerInfo structures which has the information about the peer
	// nodes participating in the same overlay network. This is currently the per-network
	// gossip cluster. For non-dynamic overlay networks and bridge networks it returns an
	// empty slice
	Peers() []networkdb.PeerInfo
	// Services returns a map of services keyed by the service name with the details
	// of all the tasks that belong to the service. Applicable only in swarm mode.
	Services() map[string]ServiceInfo
}

NetworkInfo returns some configuration and operational information about the network

type NetworkNameError 

type NetworkNameError string

NetworkNameError is returned when a network with the same name already exists.

func (NetworkNameError) Error 

func (nnr NetworkNameError) Error() string

func (NetworkNameError) Forbidden 

func (nnr NetworkNameError) Forbidden()

Forbidden denotes the type of this error

type NetworkOption 

type NetworkOption func(n *network)

NetworkOption is an option setter function type used to pass various options to NewNetwork method. The various setter functions of type NetworkOption are provided by libnetwork, they look like NetworkOptionXXXX(...)

func NetworkOptionAttachable 

func NetworkOptionAttachable(attachable bool) NetworkOption

NetworkOptionAttachable returns an option setter to set attachable for a network

func NetworkOptionConfigFrom 

func NetworkOptionConfigFrom(name string) NetworkOption

NetworkOptionConfigFrom tells controller to pick the network configuration from a configuration only network

func NetworkOptionConfigOnly 

func NetworkOptionConfigOnly() NetworkOption

NetworkOptionConfigOnly tells controller this network is a configuration only network. It serves as a configuration for other networks.

func NetworkOptionDeferIPv6Alloc 

func NetworkOptionDeferIPv6Alloc(enable bool) NetworkOption

NetworkOptionDeferIPv6Alloc instructs the network to defer the IPV6 address allocation until after the endpoint has been created It is being provided to support the specific docker daemon flags where user can deterministically assign an IPv6 address to a container as combination of fixed-cidr-v6 + mac-address TODO: Remove this option setter once we support endpoint ipam options

func NetworkOptionDriverOpts 

func NetworkOptionDriverOpts(opts map[string]string) NetworkOption

NetworkOptionDriverOpts function returns an option setter for any driver parameter described by a map

func NetworkOptionDynamic 

func NetworkOptionDynamic() NetworkOption

NetworkOptionDynamic function returns an option setter for dynamic option for a network

func NetworkOptionEnableIPv6 

func NetworkOptionEnableIPv6(enableIPv6 bool) NetworkOption

NetworkOptionEnableIPv6 returns an option setter to explicitly configure IPv6

func NetworkOptionGeneric 

func NetworkOptionGeneric(generic map[string]interface{}) NetworkOption

NetworkOptionGeneric function returns an option setter for a Generic option defined in a Dictionary of Key-Value pair

func NetworkOptionIngress 

func NetworkOptionIngress(ingress bool) NetworkOption

NetworkOptionIngress returns an option setter to indicate if a network is an ingress network.

func NetworkOptionInternalNetwork 

func NetworkOptionInternalNetwork() NetworkOption

NetworkOptionInternalNetwork returns an option setter to config the network to be internal which disables default gateway service

func NetworkOptionIpam 

func NetworkOptionIpam(ipamDriver string, addrSpace string, ipV4 []*IpamConf, ipV6 []*IpamConf, opts map[string]string) NetworkOption

NetworkOptionIpam function returns an option setter for the ipam configuration for this network

func NetworkOptionLBEndpoint 

func NetworkOptionLBEndpoint(ip net.IP) NetworkOption

NetworkOptionLBEndpoint function returns an option setter for the configuration of the load balancer endpoint for this network

func NetworkOptionLabels 

func NetworkOptionLabels(labels map[string]string) NetworkOption

NetworkOptionLabels function returns an option setter for labels specific to a network

func NetworkOptionPersist 

func NetworkOptionPersist(persist bool) NetworkOption

NetworkOptionPersist returns an option setter to set persistence policy for a network

func NetworkOptionScope 

func NetworkOptionScope(scope string) NetworkOption

NetworkOptionScope returns an option setter to overwrite the network's scope. By default the network's scope is set to the network driver's datascope.

type NetworkTypeError 

type NetworkTypeError string

NetworkTypeError type is returned when the network type string is not known to libnetwork.

func (NetworkTypeError) Error 

func (nt NetworkTypeError) Error() string

func (NetworkTypeError) NotFound 

func (nt NetworkTypeError) NotFound()

NotFound denotes the type of this error

type NetworkWalker 

type NetworkWalker func(nw Network) bool

NetworkWalker is a client provided function which will be used to walk the Networks. When the function returns true, the walk will stop.

type PortConfig 

type PortConfig struct {
	// Name for the port. If provided the port information can
	// be queried using the name as in a DNS SRV query.
	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
	// Protocol for the port which is exposed.
	Protocol PortConfig_Protocol `protobuf:"varint,2,opt,name=protocol,proto3,enum=libnetwork.PortConfig_Protocol" json:"protocol,omitempty"`
	// The port which the application is exposing and is bound to.
	TargetPort uint32 `protobuf:"varint,3,opt,name=target_port,json=targetPort,proto3" json:"target_port,omitempty"`
	// PublishedPort specifies the port on which the service is
	// exposed on all nodes on the cluster. If not specified an
	// arbitrary port in the node port range is allocated by the
	// system. If specified it should be within the node port
	// range and it should be available.
	PublishedPort uint32 `protobuf:"varint,4,opt,name=published_port,json=publishedPort,proto3" json:"published_port,omitempty"`
}

PortConfig specifies an exposed port which can be addressed using the given name. This can be later queried using a service discovery api or a DNS SRV query. The node port specifies a port that can be used to address this service external to the cluster by sending a connection request to this port to any node on the cluster.

func (*PortConfig) Descriptor 

func (*PortConfig) Descriptor() ([]byte, []int)

func (*PortConfig) GetName 

func (m *PortConfig) GetName() string

func (*PortConfig) GetProtocol 

func (m *PortConfig) GetProtocol() PortConfig_Protocol

func (*PortConfig) GetPublishedPort 

func (m *PortConfig) GetPublishedPort() uint32

func (*PortConfig) GetTargetPort 

func (m *PortConfig) GetTargetPort() uint32

func (*PortConfig) GoString 

func (this *PortConfig) GoString() string

func (*PortConfig) Marshal 

func (m *PortConfig) Marshal() (dAtA []byte, err error)

func (*PortConfig) MarshalTo 

func (m *PortConfig) MarshalTo(dAtA []byte) (int, error)

func (*PortConfig) ProtoMessage 

func (*PortConfig) ProtoMessage()

func (*PortConfig) Reset 

func (m *PortConfig) Reset()

func (*PortConfig) Size 

func (m *PortConfig) Size() (n int)

func (*PortConfig) String 

func (this *PortConfig) String() string

func (*PortConfig) Unmarshal 

func (m *PortConfig) Unmarshal(dAtA []byte) error

type PortConfig_Protocol 

type PortConfig_Protocol int32
const (
	ProtocolTCP  PortConfig_Protocol = 0
	ProtocolUDP  PortConfig_Protocol = 1
	ProtocolSCTP PortConfig_Protocol = 2
)

func (PortConfig_Protocol) EnumDescriptor 

func (PortConfig_Protocol) EnumDescriptor() ([]byte, []int)

func (PortConfig_Protocol) String 

func (x PortConfig_Protocol) String() string

type Resolver 

type Resolver interface {
	// Start starts the name server for the container
	Start() error
	// Stop stops the name server for the container. Stopped resolver
	// can be reused after running the SetupFunc again.
	Stop()
	// SetupFunc provides the setup function that should be run
	// in the container's network namespace.
	SetupFunc(int) func()
	// NameServer returns the IP of the DNS resolver for the
	// containers.
	NameServer() string
	// SetExtServers configures the external nameservers the resolver
	// should use to forward queries
	SetExtServers([]extDNSEntry)
	// ResolverOptions returns resolv.conf options that should be set
	ResolverOptions() []string
}

Resolver represents the embedded DNS server in Docker. It operates by listening on container's loopback interface for DNS queries.

func NewResolver 

func NewResolver(address string, proxyDNS bool, resolverKey string, backend DNSBackend) Resolver

NewResolver creates a new instance of the Resolver

type Sandbox 

type Sandbox interface {
	// ID returns the ID of the sandbox
	ID() string
	// Key returns the sandbox's key
	Key() string
	// ContainerID returns the container id associated to this sandbox
	ContainerID() string
	// Labels returns the sandbox's labels
	Labels() map[string]interface{}
	// Statistics retrieves the interfaces' statistics for the sandbox
	Statistics() (map[string]*types.InterfaceStatistics, error)
	// Refresh leaves all the endpoints, resets and re-applies the options,
	// re-joins all the endpoints without destroying the osl sandbox
	Refresh(options ...SandboxOption) error
	// SetKey updates the Sandbox Key
	SetKey(key string) error
	// Rename changes the name of all attached Endpoints
	Rename(name string) error
	// Delete destroys this container after detaching it from all connected endpoints.
	Delete() error
	// Endpoints returns all the endpoints connected to the sandbox
	Endpoints() []Endpoint
	// ResolveService returns all the backend details about the containers or hosts
	// backing a service. Its purpose is to satisfy an SRV query
	ResolveService(name string) ([]*net.SRV, []net.IP)
	// EnableService  makes a managed container's service available by adding the
	// endpoint to the service load balancer and service discovery
	EnableService() error
	// DisableService removes a managed container's endpoints from the load balancer
	// and service discovery
	DisableService() error
}

Sandbox provides the control over the network container entity. It is a one to one mapping with the container.

type SandboxOption 

type SandboxOption func(sb *sandbox)

SandboxOption is an option setter function type used to pass various options to NewNetContainer method. The various setter functions of type SandboxOption are provided by libnetwork, they look like ContainerOptionXXXX(...)

func OptionDNS 

func OptionDNS(dns string) SandboxOption

OptionDNS function returns an option setter for dns entry option to be passed to container Create method.

func OptionDNSOptions 

func OptionDNSOptions(options string) SandboxOption

OptionDNSOptions function returns an option setter for dns options entry option to be passed to container Create method.

func OptionDNSSearch 

func OptionDNSSearch(search string) SandboxOption

OptionDNSSearch function returns an option setter for dns search entry option to be passed to container Create method.

func OptionDomainname 

func OptionDomainname(name string) SandboxOption

OptionDomainname function returns an option setter for domainname option to be passed to NewSandbox method.

func OptionExposedPorts 

func OptionExposedPorts(exposedPorts []types.TransportPort) SandboxOption

OptionExposedPorts function returns an option setter for the container exposed ports option to be passed to container Create method.

func OptionExtraHost 

func OptionExtraHost(name string, IP string) SandboxOption

OptionExtraHost function returns an option setter for extra /etc/hosts options which is a name and IP as strings.

func OptionGeneric 

func OptionGeneric(generic map[string]interface{}) SandboxOption

OptionGeneric function returns an option setter for Generic configuration that is not managed by libNetwork but can be used by the Drivers during the call to net container creation method. Container Labels are a good example.

func OptionHostname 

func OptionHostname(name string) SandboxOption

OptionHostname function returns an option setter for hostname option to be passed to NewSandbox method.

func OptionHostsPath 

func OptionHostsPath(path string) SandboxOption

OptionHostsPath function returns an option setter for hostspath option to be passed to NewSandbox method.

func OptionIngress 

func OptionIngress() SandboxOption

OptionIngress function returns an option setter for marking a sandbox as the controller's ingress sandbox.

func OptionLoadBalancer 

func OptionLoadBalancer(nid string) SandboxOption

OptionLoadBalancer function returns an option setter for marking a sandbox as a load balancer sandbox.

func OptionOriginHostsPath 

func OptionOriginHostsPath(path string) SandboxOption

OptionOriginHostsPath function returns an option setter for origin hosts file path to be passed to NewSandbox method.

func OptionOriginResolvConfPath 

func OptionOriginResolvConfPath(path string) SandboxOption

OptionOriginResolvConfPath function returns an option setter to set the path to the origin resolv.conf file to be passed to net container methods.

func OptionParentUpdate 

func OptionParentUpdate(cid string, name, ip string) SandboxOption

OptionParentUpdate function returns an option setter for parent container which needs to update the IP address for the linked container.

func OptionPortMapping 

func OptionPortMapping(portBindings []types.PortBinding) SandboxOption

OptionPortMapping function returns an option setter for the mapping ports option to be passed to container Create method.

func OptionResolvConfPath 

func OptionResolvConfPath(path string) SandboxOption

OptionResolvConfPath function returns an option setter for resolvconfpath option to be passed to net container methods.

func OptionUseDefaultSandbox 

func OptionUseDefaultSandbox() SandboxOption

OptionUseDefaultSandbox function returns an option setter for using default sandbox (host namespace) to be passed to container Create method.

func OptionUseExternalKey 

func OptionUseExternalKey() SandboxOption

OptionUseExternalKey function returns an option setter for using provided namespace instead of creating one.

type SandboxWalker 

type SandboxWalker func(sb Sandbox) bool

SandboxWalker is a client provided function which will be used to walk the Sandboxes. When the function returns true, the walk will stop.

func SandboxContainerWalker 

func SandboxContainerWalker(out *Sandbox, containerID string) SandboxWalker

SandboxContainerWalker returns a Sandbox Walker function which looks for an existing Sandbox with the passed containerID

func SandboxKeyWalker 

func SandboxKeyWalker(out *Sandbox, key string) SandboxWalker

SandboxKeyWalker returns a Sandbox Walker function which looks for an existing Sandbox with the passed key

type ServiceInfo 

type ServiceInfo struct {
	VIP          string
	LocalLBIndex int
	Tasks        []Task
	Ports        []string
}

ServiceInfo has service specific details along with the list of backend tasks

type Task 

type Task struct {
	Name       string
	EndpointID string
	EndpointIP string
	Info       map[string]string
}

Task has the backend container details

type UnknownEndpointError 

type UnknownEndpointError struct {
	// contains filtered or unexported fields
}

UnknownEndpointError is returned when libnetwork could not find in its database an endpoint with the same name and id.

func (*UnknownEndpointError) Error 

func (uee *UnknownEndpointError) Error() string

func (*UnknownEndpointError) NotFound 

func (uee *UnknownEndpointError) NotFound()

NotFound denotes the type of this error

type UnknownNetworkError 

type UnknownNetworkError struct {
	// contains filtered or unexported fields
}

UnknownNetworkError is returned when libnetwork could not find in its database a network with the same name and id.

func (*UnknownNetworkError) Error 

func (une *UnknownNetworkError) Error() string

func (*UnknownNetworkError) NotFound 

func (une *UnknownNetworkError) NotFound()

NotFound denotes the type of this error

Source Files

View all Source files

Directories

Path Synopsis
Package bitseq provides a structure and utilities for representing long bitmask as sequence of run-length encoded blocks.
 Package bitseq provides a structure and utilities for representing long bitmask as sequence of run-length encoded blocks.
cmd
diagnostic
networkdb-test
networkdb-test/dbclient
networkdb-test/dbserver
networkdb-test/dummyclient
ovrouter
readme_test
drivers
bridge
bridge/brmanager
host
ipvlan
ipvlan/ivmanager
macvlan
macvlan/mvmanager
null
overlay
Package overlay is a generated protocol buffer package.
 Package overlay is a generated protocol buffer package.
overlay/overlayutils
Package overlayutils provides utility functions for overlay networks
 Package overlayutils provides utility functions for overlay networks
overlay/ovmanager
remote
remote/api
Package api represents all requests and responses suitable for conversation with a remote driver.
 Package api represents all requests and responses suitable for conversation with a remote driver.
windows
windows/overlay
Package overlay is a generated protocol buffer package.
 Package overlay is a generated protocol buffer package.
Package idm manages reservation/release of numerical ids from a configured set of contiguous ids
 Package idm manages reservation/release of numerical ids from a configured set of contiguous ids
internal
caller
setmatrix
Package ipamapi specifies the contract the IPAM service (built-in or remote) needs to satisfy.
 Package ipamapi specifies the contract the IPAM service (built-in or remote) needs to satisfy.
ipams
builtin
null
Package null implements the null ipam driver.
 Package null implements the null ipam driver.
remote
remote/api
Package api defines the data structure to be used in the request/response messages between libnetwork and the remote ipam plugin
 Package api defines the data structure to be used in the request/response messages between libnetwork and the remote ipam plugin
windowsipam
Package ipamutils provides utility functions for ipam management
 Package ipamutils provides utility functions for ipam management
Package networkdb is a generated protocol buffer package.
 Package networkdb is a generated protocol buffer package.
Package options provides a way to pass unstructured sets of options to a component expecting a strongly-typed configuration structure.
 Package options provides a way to pass unstructured sets of options to a component expecting a strongly-typed configuration structure.
osl
Package osl describes structures and interfaces which abstract os entities
 Package osl describes structures and interfaces which abstract os entities
kernel
Package resolvconf provides utility code to query and update DNS configuration in /etc/resolv.conf
 Package resolvconf provides utility code to query and update DNS configuration in /etc/resolv.conf
Package types contains types that are common across libnetwork project
 Package types contains types that are common across libnetwork project

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