libnetwork - networking for containers

Design

Using libnetwork

import ("fmt""log""github.com/docker/docker/pkg/reexec""github.com/docker/libnetwork""github.com/docker/libnetwork/config""github.com/docker/libnetwork/netlabel""github.com/docker/libnetwork/options")func main() {if reexec.Init() {return}// Select and configure the network drivernetworkType := "bridge"// Create a new controller instancedriverOptions := options.Generic{}genericOption := make(map[string]interface{})genericOption[netlabel.GenericData] = driverOptionscontroller, 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() APIepInfo, 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

Copyright and license