mirror of https://github.com/docker/cli.git
85 lines
2.0 KiB
Go
85 lines
2.0 KiB
Go
package container
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import (
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"context"
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"fmt"
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"net"
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"strings"
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"github.com/docker/cli/cli"
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"github.com/docker/cli/cli/command"
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"github.com/docker/cli/cli/command/completion"
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"github.com/docker/go-connections/nat"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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)
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type portOptions struct {
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container string
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port string
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}
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// NewPortCommand creates a new cobra.Command for `docker port`
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func NewPortCommand(dockerCli command.Cli) *cobra.Command {
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var opts portOptions
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cmd := &cobra.Command{
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Use: "port CONTAINER [PRIVATE_PORT[/PROTO]]",
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Short: "List port mappings or a specific mapping for the container",
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Args: cli.RequiresRangeArgs(1, 2),
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RunE: func(cmd *cobra.Command, args []string) error {
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opts.container = args[0]
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if len(args) > 1 {
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opts.port = args[1]
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}
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return runPort(dockerCli, &opts)
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},
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Annotations: map[string]string{
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"aliases": "docker container port, docker port",
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},
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ValidArgsFunction: completion.ContainerNames(dockerCli, false),
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}
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return cmd
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}
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func runPort(dockerCli command.Cli, opts *portOptions) error {
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ctx := context.Background()
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c, err := dockerCli.Client().ContainerInspect(ctx, opts.container)
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if err != nil {
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return err
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}
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if opts.port != "" {
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port := opts.port
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proto := "tcp"
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parts := strings.SplitN(port, "/", 2)
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if len(parts) == 2 && len(parts[1]) != 0 {
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port = parts[0]
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proto = parts[1]
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}
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natPort := port + "/" + proto
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newP, err := nat.NewPort(proto, port)
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if err != nil {
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return err
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}
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if frontends, exists := c.NetworkSettings.Ports[newP]; exists && frontends != nil {
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for _, frontend := range frontends {
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fmt.Fprintln(dockerCli.Out(), net.JoinHostPort(frontend.HostIP, frontend.HostPort))
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}
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return nil
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}
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return errors.Errorf("Error: No public port '%s' published for %s", natPort, opts.container)
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}
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for from, frontends := range c.NetworkSettings.Ports {
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for _, frontend := range frontends {
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fmt.Fprintf(dockerCli.Out(), "%s -> %s\n", from, net.JoinHostPort(frontend.HostIP, frontend.HostPort))
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}
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}
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return nil
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}
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