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b86cb293ec
To provide users a view of service status, list the number of running task over the requested number of replicas. Signed-off-by: Stephen J Day <stephen.day@docker.com>
113 lines
2.7 KiB
Go
113 lines
2.7 KiB
Go
package service
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import (
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"fmt"
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"io"
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"strings"
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"text/tabwriter"
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"github.com/docker/docker/api/client"
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"github.com/docker/docker/cli"
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"github.com/docker/docker/opts"
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"github.com/docker/docker/pkg/stringid"
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"github.com/docker/engine-api/types"
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"github.com/docker/engine-api/types/filters"
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"github.com/docker/engine-api/types/swarm"
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"github.com/spf13/cobra"
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"golang.org/x/net/context"
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)
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const (
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listItemFmt = "%s\t%s\t%s\t%s\t%s\n"
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)
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type listOptions struct {
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quiet bool
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filter opts.FilterOpt
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}
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func newListCommand(dockerCli *client.DockerCli) *cobra.Command {
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opts := listOptions{filter: opts.NewFilterOpt()}
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cmd := &cobra.Command{
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Use: "ls",
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Aliases: []string{"list"},
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Short: "List services",
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Args: cli.NoArgs,
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RunE: func(cmd *cobra.Command, args []string) error {
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return runList(dockerCli, opts)
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},
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}
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flags := cmd.Flags()
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flags.BoolVarP(&opts.quiet, "quiet", "q", false, "Only display IDs")
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flags.VarP(&opts.filter, "filter", "f", "Filter output based on conditions provided")
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return cmd
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}
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func runList(dockerCli *client.DockerCli, opts listOptions) error {
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ctx := context.Background()
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client := dockerCli.Client()
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services, err := client.ServiceList(ctx, types.ServiceListOptions{Filter: opts.filter.Value()})
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if err != nil {
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return err
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}
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out := dockerCli.Out()
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if opts.quiet {
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printQuiet(out, services)
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} else {
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taskFilter := filters.NewArgs()
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for _, service := range services {
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taskFilter.Add("service", service.ID)
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}
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tasks, err := client.TaskList(ctx, types.TaskListOptions{Filter: taskFilter})
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if err != nil {
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return err
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}
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running := map[string]int{}
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for _, task := range tasks {
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if task.Status.State == "running" {
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running[task.ServiceID]++
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}
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}
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printTable(out, services, running)
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}
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return nil
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}
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func printTable(out io.Writer, services []swarm.Service, running map[string]int) {
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writer := tabwriter.NewWriter(out, 0, 4, 2, ' ', 0)
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// Ignore flushing errors
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defer writer.Flush()
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fmt.Fprintf(writer, listItemFmt, "ID", "NAME", "REPLICAS", "IMAGE", "COMMAND")
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for _, service := range services {
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replicas := ""
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if service.Spec.Mode.Replicated != nil && service.Spec.Mode.Replicated.Replicas != nil {
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replicas = fmt.Sprintf("%d/%d", running[service.ID], *service.Spec.Mode.Replicated.Replicas)
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} else if service.Spec.Mode.Global != nil {
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replicas = "global"
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}
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fmt.Fprintf(
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writer,
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listItemFmt,
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stringid.TruncateID(service.ID),
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service.Spec.Name,
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replicas,
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service.Spec.TaskTemplate.ContainerSpec.Image,
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strings.Join(service.Spec.TaskTemplate.ContainerSpec.Args, " "))
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}
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}
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func printQuiet(out io.Writer, services []swarm.Service) {
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for _, service := range services {
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fmt.Fprintln(out, service.ID)
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}
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}
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