Merge pull request #30897 from yongtang/30242-network-duplicate-names

Update `FindNetwork` to address network name duplications

api/server/router/network/backend.go

@@ -12,11 +12,11 @@ import (
 // Backend is all the methods that need to be implemented
 // to provide network specific functionality.
 type Backend interface {
-	FindNetwork(idName string) (libnetwork.Network, error)
+	FindUniqueNetwork(idName string) (libnetwork.Network, error)
 	GetNetworks() []libnetwork.Network
 	CreateNetwork(nc types.NetworkCreateRequest) (*types.NetworkCreateResponse, error)
 	ConnectContainerToNetwork(containerName, networkName string, endpointConfig *network.EndpointSettings) error
 	DisconnectContainerFromNetwork(containerName string, networkName string, force bool) error
-	DeleteNetwork(name string) error
+	DeleteNetwork(networkID string) error
 	NetworksPrune(ctx context.Context, pruneFilters filters.Args) (*types.NetworksPruneReport, error)
 }

api/server/router/network/network_routes.go

@@ -2,6 +2,7 @@ package network
 
 import (
 	"encoding/json"
+	"fmt"
 	"net/http"
 	"strconv"
 	"strings"
@@ -288,7 +289,12 @@ func (n *networkRouter) postNetworkConnect(ctx context.Context, w http.ResponseW
 		return err
 	}
 
-	return n.backend.ConnectContainerToNetwork(connect.Container, vars["id"], connect.EndpointConfig)
+	// Always make sure there is no ambiguity with respect to the network ID/name
+	nw, err := n.backend.FindUniqueNetwork(vars["id"])
+	if err != nil {
+		return err
+	}
+	return n.backend.ConnectContainerToNetwork(connect.Container, nw.ID(), connect.EndpointConfig)
 }
 
 func (n *networkRouter) postNetworkDisconnect(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
@@ -312,15 +318,19 @@ func (n *networkRouter) deleteNetwork(ctx context.Context, w http.ResponseWriter
 	if err := httputils.ParseForm(r); err != nil {
 		return err
 	}
-	if _, err := n.cluster.GetNetwork(vars["id"]); err == nil {
-		if err = n.cluster.RemoveNetwork(vars["id"]); err != nil {
+
+	nw, err := n.findUniqueNetwork(vars["id"])
+	if err != nil {
+		return err
+	}
+	if nw.Scope == "swarm" {
+		if err = n.cluster.RemoveNetwork(nw.ID); err != nil {
+			return err
+		}
+	} else {
+		if err := n.backend.DeleteNetwork(nw.ID); err != nil {
 			return err
 		}
-		w.WriteHeader(http.StatusNoContent)
-		return nil
-	}
-	if err := n.backend.DeleteNetwork(vars["id"]); err != nil {
-		return err
 	}
 	w.WriteHeader(http.StatusNoContent)
 	return nil
@@ -518,3 +528,79 @@ func (n *networkRouter) postNetworksPrune(ctx context.Context, w http.ResponseWr
 	}
 	return httputils.WriteJSON(w, http.StatusOK, pruneReport)
 }
+
+// findUniqueNetwork will search network across different scopes (both local and swarm).
+// NOTE: This findUniqueNetwork is different from FindUniqueNetwork in the daemon.
+// In case multiple networks have duplicate names, return error.
+// First find based on full ID, return immediately once one is found.
+// If a network appears both in swarm and local, assume it is in local first
+// For full name and partial ID, save the result first, and process later
+// in case multiple records was found based on the same term
+// TODO (yongtang): should we wrap with version here for backward compatibility?
+func (n *networkRouter) findUniqueNetwork(term string) (types.NetworkResource, error) {
+	listByFullName := map[string]types.NetworkResource{}
+	listByPartialID := map[string]types.NetworkResource{}
+
+	nw := n.backend.GetNetworks()
+	for _, network := range nw {
+		if network.ID() == term {
+			return *n.buildDetailedNetworkResources(network, false), nil
+
+		}
+		if network.Name() == term && !network.Info().Ingress() {
+			// No need to check the ID collision here as we are still in
+			// local scope and the network ID is unique in this scope.
+			listByFullName[network.ID()] = *n.buildDetailedNetworkResources(network, false)
+		}
+		if strings.HasPrefix(network.ID(), term) {
+			// No need to check the ID collision here as we are still in
+			// local scope and the network ID is unique in this scope.
+			listByPartialID[network.ID()] = *n.buildDetailedNetworkResources(network, false)
+		}
+	}
+
+	nr, _ := n.cluster.GetNetworks()
+	for _, network := range nr {
+		if network.ID == term {
+			return network, nil
+		}
+		if network.Name == term {
+			// Check the ID collision as we are in swarm scope here, and
+			// the map (of the listByFullName) may have already had a
+			// network with the same ID (from local scope previously)
+			if _, ok := listByFullName[network.ID]; !ok {
+				listByFullName[network.ID] = network
+			}
+		}
+		if strings.HasPrefix(network.ID, term) {
+			// Check the ID collision as we are in swarm scope here, and
+			// the map (of the listByPartialID) may have already had a
+			// network with the same ID (from local scope previously)
+			if _, ok := listByPartialID[network.ID]; !ok {
+				listByPartialID[network.ID] = network
+			}
+		}
+	}
+
+	// Find based on full name, returns true only if no duplicates
+	if len(listByFullName) == 1 {
+		for _, v := range listByFullName {
+			return v, nil
+		}
+	}
+	if len(listByFullName) > 1 {
+		return types.NetworkResource{}, fmt.Errorf("network %s is ambiguous (%d matches found based on name)", term, len(listByFullName))
+	}
+
+	// Find based on partial ID, returns true only if no duplicates
+	if len(listByPartialID) == 1 {
+		for _, v := range listByPartialID {
+			return v, nil
+		}
+	}
+	if len(listByPartialID) > 1 {
+		return types.NetworkResource{}, fmt.Errorf("network %s is ambiguous (%d matches found based on ID prefix)", term, len(listByPartialID))
+	}
+
+	return types.NetworkResource{}, libnetwork.ErrNoSuchNetwork(term)
+}

daemon/cluster/executor/backend.go

@@ -27,8 +27,8 @@ import (
 // Backend defines the executor component for a swarm agent.
 type Backend interface {
 	CreateManagedNetwork(clustertypes.NetworkCreateRequest) error
-	DeleteManagedNetwork(name string) error
-	FindNetwork(idName string) (libnetwork.Network, error)
+	DeleteManagedNetwork(networkID string) error
+	FindUniqueNetwork(idName string) (libnetwork.Network, error)
 	SetupIngress(clustertypes.NetworkCreateRequest, string) (<-chan struct{}, error)
 	ReleaseIngress() (<-chan struct{}, error)
 	PullImage(ctx context.Context, image, tag, platform string, metaHeaders map[string][]string, authConfig *types.AuthConfig, outStream io.Writer) error

daemon/cluster/executor/container/adapter.go

@@ -143,8 +143,8 @@ func (c *containerAdapter) pullImage(ctx context.Context) error {
 }
 
 func (c *containerAdapter) createNetworks(ctx context.Context) error {
-	for _, network := range c.container.networks() {
-		ncr, err := c.container.networkCreateRequest(network)
+	for name := range c.container.networksAttachments {
+		ncr, err := c.container.networkCreateRequest(name)
 		if err != nil {
 			return err
 		}
@@ -162,15 +162,15 @@ func (c *containerAdapter) createNetworks(ctx context.Context) error {
 }
 
 func (c *containerAdapter) removeNetworks(ctx context.Context) error {
-	for _, nid := range c.container.networks() {
-		if err := c.backend.DeleteManagedNetwork(nid); err != nil {
+	for name, v := range c.container.networksAttachments {
+		if err := c.backend.DeleteManagedNetwork(v.Network.ID); err != nil {
 			switch err.(type) {
 			case *libnetwork.ActiveEndpointsError:
 				continue
 			case libnetwork.ErrNoSuchNetwork:
 				continue
 			default:
-				log.G(ctx).Errorf("network %s remove failed: %v", nid, err)
+				log.G(ctx).Errorf("network %s remove failed: %v", name, err)
 				return err
 			}
 		}

daemon/cluster/executor/container/container.go

@@ -507,7 +507,7 @@ func getEndpointConfig(na *api.NetworkAttachment, b executorpkg.Backend) *networ
 		DriverOpts: na.DriverAttachmentOpts,
 	}
 	if v, ok := na.Network.Spec.Annotations.Labels["com.docker.swarm.predefined"]; ok && v == "true" {
-		if ln, err := b.FindNetwork(na.Network.Spec.Annotations.Name); err == nil {
+		if ln, err := b.FindUniqueNetwork(na.Network.Spec.Annotations.Name); err == nil {
 			n.NetworkID = ln.ID()
 		}
 	}
@@ -575,19 +575,6 @@ func (c *containerConfig) serviceConfig() *clustertypes.ServiceConfig {
 	return svcCfg
 }
 
-// networks returns a list of network names attached to the container. The
-// returned name can be used to lookup the corresponding network create
-// options.
-func (c *containerConfig) networks() []string {
-	var networks []string
-
-	for name := range c.networksAttachments {
-		networks = append(networks, name)
-	}
-
-	return networks
-}
-
 func (c *containerConfig) networkCreateRequest(name string) (clustertypes.NetworkCreateRequest, error) {
 	na, ok := c.networksAttachments[name]
 	if !ok {

daemon/cluster/networks.go

@@ -292,7 +292,7 @@ func (c *Cluster) populateNetworkID(ctx context.Context, client swarmapi.Control
 	for i, n := range networks {
 		apiNetwork, err := getNetwork(ctx, client, n.Target)
 		if err != nil {
-			ln, _ := c.config.Backend.FindNetwork(n.Target)
+			ln, _ := c.config.Backend.FindUniqueNetwork(n.Target)
 			if ln != nil && runconfig.IsPreDefinedNetwork(ln.Name()) {
 				// Need to retrieve the corresponding predefined swarm network
 				// and use its id for the request.

daemon/container_operations.go

@@ -251,8 +251,8 @@ func (daemon *Daemon) updateNetworkSettings(container *container.Container, n li
 		return runconfig.ErrConflictHostNetwork
 	}
 
-	for s := range container.NetworkSettings.Networks {
-		sn, err := daemon.FindNetwork(s)
+	for s, v := range container.NetworkSettings.Networks {
+		sn, err := daemon.FindUniqueNetwork(getNetworkID(s, v.EndpointSettings))
 		if err != nil {
 			continue
 		}
@@ -308,8 +308,8 @@ func (daemon *Daemon) updateNetwork(container *container.Container) error {
 
 	// Find if container is connected to the default bridge network
 	var n libnetwork.Network
-	for name := range container.NetworkSettings.Networks {
-		sn, err := daemon.FindNetwork(name)
+	for name, v := range container.NetworkSettings.Networks {
+		sn, err := daemon.FindUniqueNetwork(getNetworkID(name, v.EndpointSettings))
 		if err != nil {
 			continue
 		}
@@ -339,7 +339,7 @@ func (daemon *Daemon) updateNetwork(container *container.Container) error {
 }
 
 func (daemon *Daemon) findAndAttachNetwork(container *container.Container, idOrName string, epConfig *networktypes.EndpointSettings) (libnetwork.Network, *networktypes.NetworkingConfig, error) {
-	n, err := daemon.FindNetwork(idOrName)
+	n, err := daemon.FindUniqueNetwork(getNetworkID(idOrName, epConfig))
 	if err != nil {
 		// We should always be able to find the network for a
 		// managed container.
@@ -377,16 +377,16 @@ func (daemon *Daemon) findAndAttachNetwork(container *container.Container, idOrN
 		// trigger attachment in the swarm cluster manager.
 		if daemon.clusterProvider != nil {
 			var err error
-			config, err = daemon.clusterProvider.AttachNetwork(idOrName, container.ID, addresses)
+			config, err = daemon.clusterProvider.AttachNetwork(getNetworkID(idOrName, epConfig), container.ID, addresses)
 			if err != nil {
 				return nil, nil, err
 			}
 		}
 
-		n, err = daemon.FindNetwork(idOrName)
+		n, err = daemon.FindUniqueNetwork(getNetworkID(idOrName, epConfig))
 		if err != nil {
 			if daemon.clusterProvider != nil {
-				if err := daemon.clusterProvider.DetachNetwork(idOrName, container.ID); err != nil {
+				if err := daemon.clusterProvider.DetachNetwork(getNetworkID(idOrName, epConfig), container.ID); err != nil {
 					logrus.Warnf("Could not rollback attachment for container %s to network %s: %v", container.ID, idOrName, err)
 				}
 			}
@@ -437,7 +437,7 @@ func (daemon *Daemon) updateContainerNetworkSettings(container *container.Contai
 	if mode.IsUserDefined() {
 		var err error
 
-		n, err = daemon.FindNetwork(networkName)
+		n, err = daemon.FindUniqueNetwork(networkName)
 		if err == nil {
 			networkName = n.Name()
 		}
@@ -797,7 +797,7 @@ func (daemon *Daemon) connectToNetwork(container *container.Container, idOrName
 
 // ForceEndpointDelete deletes an endpoint from a network forcefully
 func (daemon *Daemon) ForceEndpointDelete(name string, networkName string) error {
-	n, err := daemon.FindNetwork(networkName)
+	n, err := daemon.FindUniqueNetwork(networkName)
 	if err != nil {
 		return err
 	}
@@ -949,7 +949,7 @@ func (daemon *Daemon) releaseNetwork(container *container.Container) {
 
 	var networks []libnetwork.Network
 	for n, epSettings := range settings {
-		if nw, err := daemon.FindNetwork(n); err == nil {
+		if nw, err := daemon.FindUniqueNetwork(getNetworkID(n, epSettings.EndpointSettings)); err == nil {
 			networks = append(networks, nw)
 		}
 
@@ -993,7 +993,7 @@ func (daemon *Daemon) ConnectToNetwork(container *container.Container, idOrName
 			return errRemovalContainer(container.ID)
 		}
 
-		n, err := daemon.FindNetwork(idOrName)
+		n, err := daemon.FindUniqueNetwork(idOrName)
 		if err == nil && n != nil {
 			if err := daemon.updateNetworkConfig(container, n, endpointConfig, true); err != nil {
 				return err
@@ -1016,7 +1016,7 @@ func (daemon *Daemon) ConnectToNetwork(container *container.Container, idOrName
 
 // DisconnectFromNetwork disconnects container from network n.
 func (daemon *Daemon) DisconnectFromNetwork(container *container.Container, networkName string, force bool) error {
-	n, err := daemon.FindNetwork(networkName)
+	n, err := daemon.FindUniqueNetwork(networkName)
 	container.Lock()
 	defer container.Unlock()
 
@@ -1087,3 +1087,12 @@ func (daemon *Daemon) DeactivateContainerServiceBinding(containerName string) er
 	}
 	return sb.DisableService()
 }
+
+func getNetworkID(name string, endpointSettings *networktypes.EndpointSettings) string {
+	// We only want to prefer NetworkID for user defined networks.
+	// For systems like bridge, none, etc. the name is preferred (otherwise restart may cause issues)
+	if containertypes.NetworkMode(name).IsUserDefined() && endpointSettings != nil && endpointSettings.NetworkID != "" {
+		return endpointSettings.NetworkID
+	}
+	return name
+}

daemon/container_operations_windows.go

@@ -170,7 +170,7 @@ func (daemon *Daemon) initializeNetworkingPaths(container *container.Container,
 
 	if nc.NetworkSettings != nil {
 		for n := range nc.NetworkSettings.Networks {
-			sn, err := daemon.FindNetwork(n)
+			sn, err := daemon.FindUniqueNetwork(n)
 			if err != nil {
 				continue
 			}

daemon/daemon_test.go

@@ -317,7 +317,7 @@ func TestValidateContainerIsolation(t *testing.T) {
 
 func TestFindNetworkErrorType(t *testing.T) {
 	d := Daemon{}
-	_, err := d.FindNetwork("fakeNet")
+	_, err := d.FindUniqueNetwork("fakeNet")
 	_, ok := errors.Cause(err).(libnetwork.ErrNoSuchNetwork)
 	if !errdefs.IsNotFound(err) || !ok {
 		assert.Fail(t, "The FindNetwork method MUST always return an error that implements the NotFound interface and is ErrNoSuchNetwork")

daemon/errors.go

@@ -226,20 +226,3 @@ func translateContainerdStartErr(cmd string, setExitCode func(int), err error) e
 	// TODO: it would be nice to get some better errors from containerd so we can return better errors here
 	return retErr
 }
-
-// TODO: cpuguy83 take care of it once the new library is ready
-type errNotFound struct{ error }
-
-func (errNotFound) NotFound() {}
-
-func (e errNotFound) Cause() error {
-	return e.error
-}
-
-// notFound is a helper to create an error of the class with the same name from any error type
-func notFound(err error) error {
-	if err == nil {
-		return nil
-	}
-	return errNotFound{err}
-}

daemon/network.go

@@ -29,36 +29,36 @@ func (daemon *Daemon) NetworkControllerEnabled() bool {
 	return daemon.netController != nil
 }
 
-// FindNetwork function finds a network for a given string that can represent network name or id
-func (daemon *Daemon) FindNetwork(idName string) (libnetwork.Network, error) {
-	// 1. match by full ID.
-	n, err := daemon.GetNetworkByID(idName)
-	if err == nil || !isNoSuchNetworkError(err) {
-		return n, err
-	}
-
-	// 2. match by full name
-	n, err = daemon.GetNetworkByName(idName)
-	if err == nil || !isNoSuchNetworkError(err) {
-		return n, err
-	}
-
-	// 3. match by ID prefix
-	list := daemon.GetNetworksByIDPrefix(idName)
-	if len(list) == 0 {
-		// Be very careful to change the error type here, the libnetwork.ErrNoSuchNetwork error is used by the controller
-		// to retry the creation of the network as managed through the swarm manager
-		return nil, errors.WithStack(notFound(libnetwork.ErrNoSuchNetwork(idName)))
-	}
-	if len(list) > 1 {
-		return nil, errors.WithStack(invalidIdentifier(idName))
+// FindUniqueNetwork returns a network based on:
+// 1. Full ID
+// 2. Full Name
+// 3. Partial ID
+// as long as there is no ambiguity
+func (daemon *Daemon) FindUniqueNetwork(term string) (libnetwork.Network, error) {
+	listByFullName := []libnetwork.Network{}
+	listByPartialID := []libnetwork.Network{}
+	for _, nw := range daemon.GetNetworks() {
+		if nw.ID() == term {
+			return nw, nil
+		}
+		if nw.Name() == term {
+			listByFullName = append(listByFullName, nw)
+		}
+		if strings.HasPrefix(nw.ID(), term) {
+			listByPartialID = append(listByPartialID, nw)
+		}
 	}
-	return list[0], nil
-}
-
-func isNoSuchNetworkError(err error) bool {
-	_, ok := err.(libnetwork.ErrNoSuchNetwork)
-	return ok
+	switch {
+	case len(listByFullName) == 1:
+		return listByFullName[0], nil
+	case len(listByFullName) > 1:
+		return nil, fmt.Errorf("network %s is ambiguous (%d matches found based on name)", term, len(listByFullName))
+	case len(listByPartialID) == 1:
+		return listByPartialID[0], nil
+	case len(listByPartialID) > 1:
+		return nil, fmt.Errorf("network %s is ambiguous (%d matches found based on ID prefix)", term, len(listByPartialID))
+	}
+	return nil, libnetwork.ErrNoSuchNetwork(term)
 }
 
 // GetNetworkByID function returns a network whose ID matches the given ID.
@@ -104,7 +104,11 @@ func (daemon *Daemon) GetNetworksByIDPrefix(partialID string) []libnetwork.Netwo
 
 // getAllNetworks returns a list containing all networks
 func (daemon *Daemon) getAllNetworks() []libnetwork.Network {
-	return daemon.netController.Networks()
+	c := daemon.netController
+	if c == nil {
+		return nil
+	}
+	return c.Networks()
 }
 
 type ingressJob struct {
@@ -274,7 +278,9 @@ func (daemon *Daemon) createNetwork(create types.NetworkCreateRequest, id string
 		// check if user defined CheckDuplicate, if set true, return err
 		// otherwise prepare a warning message
 		if create.CheckDuplicate {
-			return nil, libnetwork.NetworkNameError(create.Name)
+			if !agent || nw.Info().Dynamic() {
+				return nil, libnetwork.NetworkNameError(create.Name)
+			}
 		}
 		warning = fmt.Sprintf("Network with name %s (id : %s) already exists", nw.Name(), nw.ID())
 	}
@@ -464,25 +470,56 @@ func (daemon *Daemon) GetNetworkDriverList() []string {
 }
 
 // DeleteManagedNetwork deletes an agent network.
+// The requirement of networkID is enforced.
 func (daemon *Daemon) DeleteManagedNetwork(networkID string) error {
-	return daemon.deleteNetwork(networkID, true)
+	n, err := daemon.GetNetworkByID(networkID)
+	if err != nil {
+		return err
+	}
+	return daemon.deleteNetwork(n, true)
 }
 
 // DeleteNetwork destroys a network unless it's one of docker's predefined networks.
 func (daemon *Daemon) DeleteNetwork(networkID string) error {
-	return daemon.deleteNetwork(networkID, false)
-}
-
-func (daemon *Daemon) deleteNetwork(networkID string, dynamic bool) error {
-	nw, err := daemon.FindNetwork(networkID)
+	n, err := daemon.GetNetworkByID(networkID)
 	if err != nil {
 		return err
 	}
+	return daemon.deleteNetwork(n, false)
+}
 
-	if nw.Info().Ingress() {
-		return nil
+func (daemon *Daemon) deleteLoadBalancerSandbox(n libnetwork.Network) {
+	controller := daemon.netController
+
+	//The only endpoint left should be the LB endpoint (nw.Name() + "-endpoint")
+	endpoints := n.Endpoints()
+	if len(endpoints) == 1 {
+		sandboxName := n.Name() + "-sbox"
+
+		info := endpoints[0].Info()
+		if info != nil {
+			sb := info.Sandbox()
+			if sb != nil {
+				if err := sb.DisableService(); err != nil {
+					logrus.Warnf("Failed to disable service on sandbox %s: %v", sandboxName, err)
+					//Ignore error and attempt to delete the load balancer endpoint
+				}
+			}
+		}
+
+		if err := endpoints[0].Delete(true); err != nil {
+			logrus.Warnf("Failed to delete endpoint %s (%s) in %s: %v", endpoints[0].Name(), endpoints[0].ID(), sandboxName, err)
+			//Ignore error and attempt to delete the sandbox.
+		}
+
+		if err := controller.SandboxDestroy(sandboxName); err != nil {
+			logrus.Warnf("Failed to delete %s sandbox: %v", sandboxName, err)
+			//Ignore error and attempt to delete the network.
+		}
 	}
+}
 
+func (daemon *Daemon) deleteNetwork(nw libnetwork.Network, dynamic bool) error {
 	if runconfig.IsPreDefinedNetwork(nw.Name()) && !dynamic {
 		err := fmt.Errorf("%s is a pre-defined network and cannot be removed", nw.Name())
 		return notAllowedError{err}

daemon/oci_windows.go

@@ -159,7 +159,7 @@ func (daemon *Daemon) createSpec(c *container.Container) (*specs.Spec, error) {
 	gwHNSID := ""
 	if c.NetworkSettings != nil {
 		for n := range c.NetworkSettings.Networks {
-			sn, err := daemon.FindNetwork(n)
+			sn, err := daemon.FindUniqueNetwork(n)
 			if err != nil {
 				continue
 			}

integration/service/create_test.go

@@ -11,6 +11,7 @@ import (
 	"github.com/docker/docker/client"
 	"github.com/docker/docker/integration-cli/request"
 	"github.com/gotestyourself/gotestyourself/poll"
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"golang.org/x/net/context"
 )
@@ -80,6 +81,68 @@ func TestCreateServiceMultipleTimes(t *testing.T) {
 	poll.WaitOn(t, networkIsRemoved(client, overlayID), poll.WithTimeout(1*time.Minute), poll.WithDelay(10*time.Second))
 }
 
+func TestCreateWithDuplicateNetworkNames(t *testing.T) {
+	defer setupTest(t)()
+	d := newSwarm(t)
+	defer d.Stop(t)
+	client, err := request.NewClientForHost(d.Sock())
+	require.NoError(t, err)
+
+	name := "foo"
+	networkCreate := types.NetworkCreate{
+		CheckDuplicate: false,
+		Driver:         "bridge",
+	}
+
+	n1, err := client.NetworkCreate(context.Background(), name, networkCreate)
+	require.NoError(t, err)
+
+	n2, err := client.NetworkCreate(context.Background(), name, networkCreate)
+	require.NoError(t, err)
+
+	// Dupliates with name but with different driver
+	networkCreate.Driver = "overlay"
+	n3, err := client.NetworkCreate(context.Background(), name, networkCreate)
+	require.NoError(t, err)
+
+	// Create Service with the same name
+	var instances uint64 = 1
+	serviceSpec := swarmServiceSpec("top", instances)
+
+	serviceSpec.TaskTemplate.Networks = append(serviceSpec.TaskTemplate.Networks, swarm.NetworkAttachmentConfig{Target: name})
+
+	service, err := client.ServiceCreate(context.Background(), serviceSpec, types.ServiceCreateOptions{})
+	require.NoError(t, err)
+
+	poll.WaitOn(t, serviceRunningTasksCount(client, service.ID, instances))
+
+	resp, _, err := client.ServiceInspectWithRaw(context.Background(), service.ID, types.ServiceInspectOptions{})
+	require.NoError(t, err)
+	assert.Equal(t, n3.ID, resp.Spec.TaskTemplate.Networks[0].Target)
+
+	// Remove Service
+	err = client.ServiceRemove(context.Background(), service.ID)
+	require.NoError(t, err)
+
+	// Make sure task has been destroyed.
+	poll.WaitOn(t, serviceIsRemoved(client, service.ID))
+
+	// Remove networks
+	err = client.NetworkRemove(context.Background(), n3.ID)
+	require.NoError(t, err)
+
+	err = client.NetworkRemove(context.Background(), n2.ID)
+	require.NoError(t, err)
+
+	err = client.NetworkRemove(context.Background(), n1.ID)
+	require.NoError(t, err)
+
+	// Make sure networks have been destroyed.
+	poll.WaitOn(t, networkIsRemoved(client, n3.ID), poll.WithTimeout(1*time.Minute), poll.WithDelay(10*time.Second))
+	poll.WaitOn(t, networkIsRemoved(client, n2.ID), poll.WithTimeout(1*time.Minute), poll.WithDelay(10*time.Second))
+	poll.WaitOn(t, networkIsRemoved(client, n1.ID), poll.WithTimeout(1*time.Minute), poll.WithDelay(10*time.Second))
+}
+
 func swarmServiceSpec(name string, replicas uint64) swarm.ServiceSpec {
 	return swarm.ServiceSpec{
 		Annotations: swarm.Annotations{