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")funcmain() {ifreexec.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))iferr!=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","")iferr!=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")iferr!=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"))iferr!=nil {log.Fatalf("controller.NewSandbox: %s",err)}// A sandbox can join the endpoint via the join api.err=ep.Join(sbx)iferr!=nil {log.Fatalf("ep.Join: %s",err)}// libnetwork client can check the endpoint's operational data via the Info() APIepInfo,err:=ep.DriverInfo()iferr!=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