Cli change to pass driver specific options to docker run

The commit contains cli changes to support driver options for a network in
docker run and docker network connect cli's. The driver-opt, aliases is now
supported in the form of csv as per network option in service commands in
swarm mode since docker/cli#62 . This commit extends this support to docker
run command as well.

For docker connect command `--driver-opt` is added to pass driver specific
options for the network the container is connecting to.

Signed-off-by: Abhinandan Prativadi <abhi@docker.com>
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/command/container/opts.go

@@ -97,7 +97,7 @@ type containerOptions struct {
 	ioMaxBandwidth     opts.MemBytes
 	ioMaxIOps          uint64
 	swappiness         int64
-	netMode            string
+	netMode            opts.NetworkOpt
 	macAddress         string
 	ipv4Address        string
 	ipv6Address        string
@@ -215,8 +215,8 @@ func addFlags(flags *pflag.FlagSet) *containerOptions {
 	flags.VarP(&copts.publish, "publish", "p", "Publish a container's port(s) to the host")
 	flags.BoolVarP(&copts.publishAll, "publish-all", "P", false, "Publish all exposed ports to random ports")
 	// We allow for both "--net" and "--network", although the latter is the recommended way.
-	flags.StringVar(&copts.netMode, "net", "default", "Connect a container to a network")
-	flags.StringVar(&copts.netMode, "network", "default", "Connect a container to a network")
+	flags.Var(&copts.netMode, "net", "Connect a container to a network")
+	flags.Var(&copts.netMode, "network", "Connect a container to a network")
 	flags.MarkHidden("net")
 	// We allow for both "--net-alias" and "--network-alias", although the latter is the recommended way.
 	flags.Var(&copts.aliases, "net-alias", "Add network-scoped alias for the container")
@@ -613,8 +613,8 @@ func parse(flags *pflag.FlagSet, copts *containerOptions, serverOS string) (*con
 		DNSOptions:     copts.dnsOptions.GetAllOrEmpty(),
 		ExtraHosts:     copts.extraHosts.GetAll(),
 		VolumesFrom:    copts.volumesFrom.GetAll(),
-		NetworkMode:    container.NetworkMode(copts.netMode),
 		IpcMode:        container.IpcMode(copts.ipcMode),
+		NetworkMode:    container.NetworkMode(copts.netMode.NetworkMode()),
 		PidMode:        pidMode,
 		UTSMode:        utsMode,
 		UsernsMode:     usernsMode,
@@ -678,6 +678,27 @@ func parse(flags *pflag.FlagSet, copts *containerOptions, serverOS string) (*con
 		copy(epConfig.Links, hostConfig.Links)
 		networkingConfig.EndpointsConfig[string(hostConfig.NetworkMode)] = epConfig
 	}
+	value := copts.netMode.Value()
+
+	if value != nil && hostConfig.NetworkMode.IsUserDefined() {
+		epConfig := networkingConfig.EndpointsConfig[string(hostConfig.NetworkMode)]
+		if epConfig == nil {
+			epConfig = &networktypes.EndpointSettings{}
+		}
+
+		if len(value[0].Aliases) > 0 {
+			if copts.aliases.Len() > 0 {
+				return nil, fmt.Errorf("ambiguity in alias options provided")
+			}
+			epConfig.Aliases = append(epConfig.Aliases, value[0].Aliases...)
+		}
+
+		if len(value[0].DriverOpts) > 0 {
+			epConfig.DriverOpts = make(map[string]string)
+			epConfig.DriverOpts = value[0].DriverOpts
+		}
+		networkingConfig.EndpointsConfig[string(hostConfig.NetworkMode)] = epConfig
+	}
 
 	if copts.aliases.Len() > 0 {
 		epConfig := networkingConfig.EndpointsConfig[string(hostConfig.NetworkMode)]

cli/command/network/connect.go

@@ -3,6 +3,9 @@ package network
 import (
 	"context"
 
+	"fmt"
+	"strings"
+
 	"github.com/docker/cli/cli"
 	"github.com/docker/cli/cli/command"
 	"github.com/docker/cli/opts"
@@ -18,6 +21,7 @@ type connectOptions struct {
 	links        opts.ListOpts
 	aliases      []string
 	linklocalips []string
+	driverOpts   []string
 }
 
 func newConnectCommand(dockerCli command.Cli) *cobra.Command {
@@ -42,13 +46,17 @@ func newConnectCommand(dockerCli command.Cli) *cobra.Command {
 	flags.Var(&options.links, "link", "Add link to another container")
 	flags.StringSliceVar(&options.aliases, "alias", []string{}, "Add network-scoped alias for the container")
 	flags.StringSliceVar(&options.linklocalips, "link-local-ip", []string{}, "Add a link-local address for the container")
-
+	flags.StringSliceVar(&options.driverOpts, "driver-opt", []string{}, "driver options for the network")
 	return cmd
 }
 
 func runConnect(dockerCli command.Cli, options connectOptions) error {
 	client := dockerCli.Client()
 
+	driverOpts, err := convertDriverOpt(options.driverOpts)
+	if err != nil {
+		return err
+	}
 	epConfig := &network.EndpointSettings{
 		IPAMConfig: &network.EndpointIPAMConfig{
 			IPv4Address:  options.ipaddress,
@@ -57,7 +65,22 @@ func runConnect(dockerCli command.Cli, options connectOptions) error {
 		},
 		Links:      options.links.GetAll(),
 		Aliases:    options.aliases,
+		DriverOpts: driverOpts,
 	}
 
 	return client.NetworkConnect(context.Background(), options.network, options.container, epConfig)
 }
+
+func convertDriverOpt(opts []string) (map[string]string, error) {
+	driverOpt := make(map[string]string)
+	for _, opt := range opts {
+		parts := strings.SplitN(opt, "=", 2)
+		if len(parts) != 2 {
+			return nil, fmt.Errorf("invalid key/value pair format in driver options")
+		}
+		key := strings.TrimSpace(parts[0])
+		value := strings.TrimSpace(parts[1])
+		driverOpt[key] = value
+	}
+	return driverOpt, nil
+}

opts/network.go

@@ -95,6 +95,16 @@ func (n *NetworkOpt) String() string {
 	return ""
 }
 
+// NetworkMode return the network mode for the network option
+func (n *NetworkOpt) NetworkMode() string {
+	networkIDOrName := "default"
+	netOptVal := n.Value()
+	if len(netOptVal) > 0 {
+		networkIDOrName = netOptVal[0].Target
+	}
+	return networkIDOrName
+}
+
 func parseDriverOpt(driverOpt string) (string, string, error) {
 	parts := strings.SplitN(driverOpt, "=", 2)
 	if len(parts) != 2 {