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97 lines
3.1 KiB
Markdown
97 lines
3.1 KiB
Markdown
# libnetwork - networking for containers
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Libnetwork provides a native Go implementation for connecting containers
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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.
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#### Design
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Please refer to the [design](docs/design.md) for more information.
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#### Using libnetwork
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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.
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```go
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package main
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import (
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"fmt"
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"log"
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"github.com/docker/docker/pkg/reexec"
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"github.com/docker/docker/libnetwork"
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"github.com/docker/docker/libnetwork/config"
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"github.com/docker/docker/libnetwork/netlabel"
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"github.com/docker/docker/libnetwork/options"
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)
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func main() {
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if reexec.Init() {
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return
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}
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// Select and configure the network driver
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networkType := "bridge"
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// Create a new controller instance
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driverOptions := options.Generic{}
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genericOption := make(map[string]interface{})
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genericOption[netlabel.GenericData] = driverOptions
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controller, err := libnetwork.New(config.OptionDriverConfig(networkType, genericOption))
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if err != nil {
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log.Fatalf("libnetwork.New: %s", err)
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}
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// Create a network for containers to join.
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// NewNetwork accepts Variadic optional arguments that libnetwork and Drivers can use.
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network, err := controller.NewNetwork(networkType, "network1", "")
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if err != nil {
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log.Fatalf("controller.NewNetwork: %s", err)
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}
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// For each new container: allocate IP and interfaces. The returned network
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// settings will be used for container infos (inspect and such), as well as
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// iptables rules for port publishing. This info is contained or accessible
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// from the returned endpoint.
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ep, err := network.CreateEndpoint("Endpoint1")
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if err != nil {
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log.Fatalf("network.CreateEndpoint: %s", err)
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}
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// Create the sandbox for the container.
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// NewSandbox accepts Variadic optional arguments which libnetwork can use.
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sbx, err := controller.NewSandbox("container1",
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libnetwork.OptionHostname("test"),
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libnetwork.OptionDomainname("docker.io"))
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if err != nil {
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log.Fatalf("controller.NewSandbox: %s", err)
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}
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// A sandbox can join the endpoint via the join api.
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err = ep.Join(sbx)
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if err != nil {
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log.Fatalf("ep.Join: %s", err)
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}
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// libnetwork client can check the endpoint's operational data via the Info() API
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epInfo, err := ep.DriverInfo()
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if err != nil {
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log.Fatalf("ep.DriverInfo: %s", err)
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}
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macAddress, ok := epInfo[netlabel.MacAddress]
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if !ok {
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log.Fatalf("failed to get mac address from endpoint info")
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}
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fmt.Printf("Joined endpoint %s (%s) to sandbox %s (%s)\n", ep.Name(), macAddress, sbx.ContainerID(), sbx.Key())
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}
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```
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## Contributing
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Want to hack on libnetwork? [Docker's contributions guidelines](https://github.com/docker/docker/blob/master/CONTRIBUTING.md) apply.
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## Copyright and license
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Code and documentation copyright 2015 Docker, inc. Code released under the Apache 2.0 license. Docs released under Creative commons.
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