// New returns a new NetworkAllocator handle
func New(pg plugingetter.PluginGetter) (*NetworkAllocator, error) {
	na := &NetworkAllocator{
		networks: make(map[string]*network),
		services: make(map[string]struct{}),
		tasks:    make(map[string]struct{}),
		nodes:    make(map[string]struct{}),
	}

	// There are no driver configurations and notification
	// functions as of now.
	reg, err := drvregistry.New(nil, nil, nil, nil, pg)
	if err != nil {
		return nil, err
	}

	if err := initializeDrivers(reg); err != nil {
		return nil, err
	}

	if err = initIPAMDrivers(reg); err != nil {
		return nil, err
	}

	pa, err := newPortAllocator()
	if err != nil {
		return nil, err
	}

	na.portAllocator = pa
	na.drvRegistry = reg
	return na, nil
}

// New creates a new instance of network controller.
func New(cfgOptions ...config.Option) (NetworkController, error) {
	c := &controller{
		id:              stringid.GenerateRandomID(),
		cfg:             config.ParseConfigOptions(cfgOptions...),
		sandboxes:       sandboxTable{},
		svcRecords:      make(map[string]svcInfo),
		serviceBindings: make(map[serviceKey]*service),
		agentInitDone:   make(chan struct{}),
	}

	if err := c.initStores(); err != nil {
		return nil, err
	}

	drvRegistry, err := drvregistry.New(c.getStore(datastore.LocalScope), c.getStore(datastore.GlobalScope), c.RegisterDriver, nil)
	if err != nil {
		return nil, err
	}

	for _, i := range getInitializers() {
		var dcfg map[string]interface{}

		// External plugins don't need config passed through daemon. They can
		// bootstrap themselves
		if i.ntype != "remote" {
			dcfg = c.makeDriverConfig(i.ntype)
		}

		if err := drvRegistry.AddDriver(i.ntype, i.fn, dcfg); err != nil {
			return nil, err
		}
	}
	c.drvRegistry = drvRegistry

	if c.cfg != nil && c.cfg.Cluster.Watcher != nil {
		if err := c.initDiscovery(c.cfg.Cluster.Watcher); err != nil {
			// Failing to initialize discovery is a bad situation to be in.
			// But it cannot fail creating the Controller
			log.Errorf("Failed to Initialize Discovery : %v", err)
		}
	}

	c.WalkNetworks(populateSpecial)

	// Reserve pools first before doing cleanup. Otherwise the
	// cleanups of endpoint/network and sandbox below will
	// generate many unnecessary warnings
	c.reservePools()

	// Cleanup resources
	c.sandboxCleanup(c.cfg.ActiveSandboxes)
	c.cleanupLocalEndpoints()
	c.networkCleanup()

	if err := c.startExternalKeyListener(); err != nil {
		return nil, err
	}

	return c, nil
}

// New returns a new NetworkAllocator handle
func New() (*NetworkAllocator, error) {
	na := &NetworkAllocator{
		networks: make(map[string]*network),
		services: make(map[string]struct{}),
	}

	// There are no driver configurations and notification
	// functions as of now.
	reg, err := drvregistry.New(nil, nil, nil, nil)
	if err != nil {
		return nil, err
	}

	// Add the manager component of overlay driver to the registry.
	if err := reg.AddDriver(defaultDriver, defaultDriverInitFunc, nil); err != nil {
		return nil, err
	}

	pa, err := newPortAllocator()
	if err != nil {
		return nil, err
	}

	na.portAllocator = pa
	na.drvRegistry = reg
	return na, nil
}

// New creates a new instance of network controller.
func New(cfgOptions ...config.Option) (NetworkController, error) {
	c := &controller{
		id:              stringid.GenerateRandomID(),
		cfg:             config.ParseConfigOptions(cfgOptions...),
		sandboxes:       sandboxTable{},
		svcRecords:      make(map[string]svcInfo),
		serviceBindings: make(map[string]*service),
	}

	if err := c.agentInit(c.cfg.Daemon.Bind); err != nil {
		return nil, err
	}

	if err := c.agentJoin(c.cfg.Daemon.Neighbors); err != nil {
		return nil, err
	}

	if err := c.initStores(); err != nil {
		return nil, err
	}

	drvRegistry, err := drvregistry.New(c.getStore(datastore.LocalScope), c.getStore(datastore.GlobalScope), c.RegisterDriver, nil)
	if err != nil {
		return nil, err
	}

	for _, i := range getInitializers() {
		var dcfg map[string]interface{}

		// External plugins don't need config passed through daemon. They can
		// bootstrap themselves
		if i.ntype != "remote" {
			dcfg = c.makeDriverConfig(i.ntype)
		}

		if err := drvRegistry.AddDriver(i.ntype, i.fn, dcfg); err != nil {
			return nil, err
		}
	}
	c.drvRegistry = drvRegistry

	if c.cfg != nil && c.cfg.Cluster.Watcher != nil {
		if err := c.initDiscovery(c.cfg.Cluster.Watcher); err != nil {
			// Failing to initialize discovery is a bad situation to be in.
			// But it cannot fail creating the Controller
			log.Errorf("Failed to Initialize Discovery : %v", err)
		}
	}

	c.sandboxCleanup()
	c.cleanupLocalEndpoints()
	c.networkCleanup()

	if err := c.startExternalKeyListener(); err != nil {
		return nil, err
	}

	return c, nil
}

// New returns a new NetworkAllocator handle
func New() (*NetworkAllocator, error) {
	na := &NetworkAllocator{
		networks: make(map[string]*network),
		services: make(map[string]struct{}),
		tasks:    make(map[string]struct{}),
		nodes:    make(map[string]struct{}),
	}

	// There are no driver configurations and notification
	// functions as of now.
	reg, err := drvregistry.New(nil, nil, nil, nil)
	if err != nil {
		return nil, err
	}

	// Add the manager component of overlay driver to the registry.
	if err := reg.AddDriver(DefaultDriver, defaultDriverInitFunc, nil); err != nil {
		return nil, err
	}

	for _, fn := range [](func(ipamapi.Callback, interface{}, interface{}) error){
		builtinIpam.Init,
		nullIpam.Init,
	} {
		if err := fn(reg, nil, nil); err != nil {
			return nil, err
		}
	}

	pa, err := newPortAllocator()
	if err != nil {
		return nil, err
	}

	na.portAllocator = pa
	na.drvRegistry = reg
	return na, nil
}