github.com/kobeld/docker@v1.12.0-rc1/api/client/service/list.go (about)

     1  package service
     2  
     3  import (
     4  	"fmt"
     5  	"io"
     6  	"strings"
     7  	"text/tabwriter"
     8  
     9  	"golang.org/x/net/context"
    10  
    11  	"github.com/docker/docker/api/client"
    12  	"github.com/docker/docker/cli"
    13  	"github.com/docker/docker/opts"
    14  	"github.com/docker/docker/pkg/stringid"
    15  	"github.com/docker/engine-api/types"
    16  	"github.com/docker/engine-api/types/swarm"
    17  	"github.com/spf13/cobra"
    18  )
    19  
    20  const (
    21  	listItemFmt = "%s\t%s\t%s\t%s\t%s\n"
    22  )
    23  
    24  type listOptions struct {
    25  	quiet  bool
    26  	filter opts.FilterOpt
    27  }
    28  
    29  func newListCommand(dockerCli *client.DockerCli) *cobra.Command {
    30  	opts := listOptions{filter: opts.NewFilterOpt()}
    31  
    32  	cmd := &cobra.Command{
    33  		Use:     "ls",
    34  		Aliases: []string{"list"},
    35  		Short:   "List services",
    36  		Args:    cli.NoArgs,
    37  		RunE: func(cmd *cobra.Command, args []string) error {
    38  			return runList(dockerCli, opts)
    39  		},
    40  	}
    41  
    42  	flags := cmd.Flags()
    43  	flags.BoolVarP(&opts.quiet, "quiet", "q", false, "Only display IDs")
    44  	flags.VarP(&opts.filter, "filter", "f", "Filter output based on conditions provided")
    45  
    46  	return cmd
    47  }
    48  
    49  func runList(dockerCli *client.DockerCli, opts listOptions) error {
    50  	client := dockerCli.Client()
    51  
    52  	services, err := client.ServiceList(
    53  		context.Background(),
    54  		types.ServiceListOptions{Filter: opts.filter.Value()})
    55  	if err != nil {
    56  		return err
    57  	}
    58  
    59  	out := dockerCli.Out()
    60  	if opts.quiet {
    61  		printQuiet(out, services)
    62  	} else {
    63  		printTable(out, services)
    64  	}
    65  	return nil
    66  }
    67  
    68  func printTable(out io.Writer, services []swarm.Service) {
    69  	writer := tabwriter.NewWriter(out, 0, 4, 2, ' ', 0)
    70  
    71  	// Ignore flushing errors
    72  	defer writer.Flush()
    73  
    74  	fmt.Fprintf(writer, listItemFmt, "ID", "NAME", "SCALE", "IMAGE", "COMMAND")
    75  	for _, service := range services {
    76  		scale := ""
    77  		if service.Spec.Mode.Replicated != nil && service.Spec.Mode.Replicated.Replicas != nil {
    78  			scale = fmt.Sprintf("%d", *service.Spec.Mode.Replicated.Replicas)
    79  		} else if service.Spec.Mode.Global != nil {
    80  			scale = "global"
    81  		}
    82  		fmt.Fprintf(
    83  			writer,
    84  			listItemFmt,
    85  			stringid.TruncateID(service.ID),
    86  			service.Spec.Name,
    87  			scale,
    88  			service.Spec.TaskTemplate.ContainerSpec.Image,
    89  			strings.Join(service.Spec.TaskTemplate.ContainerSpec.Args, " "))
    90  	}
    91  }
    92  
    93  func printQuiet(out io.Writer, services []swarm.Service) {
    94  	for _, service := range services {
    95  		fmt.Fprintln(out, service.ID)
    96  	}
    97  }