129 lines
3.6 KiB
Go
129 lines
3.6 KiB
Go
package service
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import (
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"fmt"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/api/types/filters"
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"github.com/docker/docker/api/types/swarm"
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"github.com/docker/docker/cli"
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"github.com/docker/docker/cli/command"
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"github.com/docker/docker/cli/command/formatter"
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"github.com/docker/docker/opts"
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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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type listOptions struct {
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quiet bool
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format string
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filter opts.FilterOpt
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}
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func newListCommand(dockerCli *command.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 [OPTIONS]",
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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.StringVar(&opts.format, "format", "", "Pretty-print services using a Go template")
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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 *command.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{Filters: opts.filter.Value()})
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if err != nil {
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return err
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}
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info := map[string]formatter.ServiceListInfo{}
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if len(services) > 0 && !opts.quiet {
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// only non-empty services and not quiet, should we call TaskList and NodeList api
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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{Filters: taskFilter})
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if err != nil {
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return err
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}
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nodes, err := client.NodeList(ctx, types.NodeListOptions{})
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if err != nil {
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return err
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}
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info = GetServicesStatus(services, nodes, tasks)
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}
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format := opts.format
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if len(format) == 0 {
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if len(dockerCli.ConfigFile().ServicesFormat) > 0 && !opts.quiet {
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format = dockerCli.ConfigFile().ServicesFormat
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} else {
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format = formatter.TableFormatKey
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}
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}
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servicesCtx := formatter.Context{
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Output: dockerCli.Out(),
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Format: formatter.NewServiceListFormat(format, opts.quiet),
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}
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return formatter.ServiceListWrite(servicesCtx, services, info)
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}
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// GetServicesStatus returns a map of mode and replicas
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func GetServicesStatus(services []swarm.Service, nodes []swarm.Node, tasks []swarm.Task) map[string]formatter.ServiceListInfo {
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running := map[string]int{}
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tasksNoShutdown := map[string]int{}
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activeNodes := make(map[string]struct{})
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for _, n := range nodes {
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if n.Status.State != swarm.NodeStateDown {
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activeNodes[n.ID] = struct{}{}
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}
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}
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for _, task := range tasks {
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if task.DesiredState != swarm.TaskStateShutdown {
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tasksNoShutdown[task.ServiceID]++
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}
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if _, nodeActive := activeNodes[task.NodeID]; nodeActive && task.Status.State == swarm.TaskStateRunning {
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running[task.ServiceID]++
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}
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}
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info := map[string]formatter.ServiceListInfo{}
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for _, service := range services {
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info[service.ID] = formatter.ServiceListInfo{}
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if service.Spec.Mode.Replicated != nil && service.Spec.Mode.Replicated.Replicas != nil {
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info[service.ID] = formatter.ServiceListInfo{
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Mode: "replicated",
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Replicas: fmt.Sprintf("%d/%d", running[service.ID], *service.Spec.Mode.Replicated.Replicas),
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}
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} else if service.Spec.Mode.Global != nil {
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info[service.ID] = formatter.ServiceListInfo{
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Mode: "global",
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Replicas: fmt.Sprintf("%d/%d", running[service.ID], tasksNoShutdown[service.ID]),
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}
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}
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}
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return info
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}
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