func add()

in plugins/ecs-bridge/commands/commands.go [49:113]
47 lines of code
8 McCabe index (conditional complexity)

func add(args *skel.CmdArgs, engine engine.Engine) error {
	conf, err := types.NewConf(args)
	if err != nil {
		return err
	}

	log.Infof("Creating the bridge: %s", conf.BridgeName)
	bridge, err := engine.CreateBridge(conf.BridgeName, conf.MTU)
	if err != nil {
		return err
	}

	log.Infof("Creating veth pair for namespace: %s", args.Netns)
	containerVethInterface, hostVethName, err := engine.CreateVethPair(
		args.Netns, conf.MTU, args.IfName)
	if err != nil {
		return err
	}

	log.Infof("Attaching veth pair %s to bridge", hostVethName)
	hostVethInterface, err := engine.AttachHostVethInterfaceToBridge(hostVethName, bridge)
	if err != nil {
		return err
	}

	log.Infof("Running IPAM plugin ADD: %s", conf.IPAM.Type)
	result, err := engine.RunIPAMPluginAdd(conf.IPAM.Type, args.StdinData)
	if err != nil {
		return err
	}

	// Construct the Interfaces list for the result returned from the IPAM
	// plugin. This consists of all the interfaces we know about. This
	// includes the bridge, the two ends of the veth interface created
	result.Interfaces = []*current.Interface{
		// the bridge interface
		0: &current.Interface{
			Name: bridge.Attrs().Name,
			Mac:  bridge.Attrs().HardwareAddr.String(),
		},
		// the host veth interface
		1: hostVethInterface,
		// the container veth interface
		2: containerVethInterface,
	}

	// Set the index for the container veth interface in the `Interfaces`
	// list populated above.
	// The `ipam.ConfigureIface` method needs this index to be set as it
	// needs to know which interface should be used when adding routes
	result.IPs[0].Interface = 2

	log.Infof("Configuring container's interface: %s", args.Netns)
	err = engine.ConfigureContainerVethInterface(args.Netns, result, args.IfName)
	if err != nil {
		return err
	}

	log.Infof("Configuring bridge: %s", conf.BridgeName)
	err = engine.ConfigureBridge(result, bridge)
	if err != nil {
		return err
	}
	return result.Print()
}