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bitseq
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cmd
config
datastore
diagnostic
discoverapi
docs
driverapi
drivers
drvregistry
etchosts
idm
internal
ipam
ipamapi
ipams
ipamutils
iptables
netlabel
netutils
networkdb
ns
options
osl
portallocator
portmapper Lock OS threads when exec'ing with Pdeathsig 2022-10-05 12:18:03 -04:00
resolvconf
support
testutils
types
.dockerignore
.gitignore
agent.go
agent.pb.go
agent.proto
CHANGELOG.md
controller.go
default_gateway.go
default_gateway_freebsd.go
default_gateway_linux.go
default_gateway_windows.go
drivers_freebsd.go
drivers_ipam.go
drivers_linux.go
drivers_windows.go
endpoint.go
endpoint_cnt.go
endpoint_info.go
endpoint_info_unix.go
endpoint_info_windows.go
endpoint_test.go
error.go
errors_test.go
firewall_linux.go
firewall_linux_test.go
firewall_others.go
libnetwork_internal_test.go
libnetwork_linux_test.go
libnetwork_test.go
libnetwork_unix_test.go
libnetwork_windows_test.go
network.go
network_unix.go
network_windows.go
README.md
resolver.go
resolver_test.go
resolver_unix.go
resolver_windows.go
sandbox.go libnetwork: remove some outdated comments 2022-10-04 15:34:39 +02:00
sandbox_dns_unix.go libnetwork: sandbox.updateDNS(): use const for file permissions 2022-10-02 01:28:05 +02:00
sandbox_dns_windows.go
sandbox_externalkey.go
sandbox_externalkey_unix.go
sandbox_externalkey_windows.go
sandbox_store.go
sandbox_test.go
service.go
service_common.go
service_common_test.go
service_linux.go
service_unsupported.go
service_windows.go
store.go
store_linux_test.go
store_test.go

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.