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package service
import (
"context"
"fmt"
"sort"
"vbom.ml/util/sortorder"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/docker/cli/cli/command/formatter"
"github.com/docker/cli/opts"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/swarm"
"github.com/spf13/cobra"
)
type listOptions struct {
quiet bool
format string
filter opts.FilterOpt
}
func newListCommand(dockerCli command.Cli) *cobra.Command {
options := listOptions{filter: opts.NewFilterOpt()}
cmd := &cobra.Command{
Use: "ls [OPTIONS]",
Aliases: []string{"list"},
Short: "List services",
Args: cli.NoArgs,
RunE: func(cmd *cobra.Command, args []string) error {
return runList(dockerCli, options)
},
}
flags := cmd.Flags()
flags.BoolVarP(&options.quiet, "quiet", "q", false, "Only display IDs")
flags.StringVar(&options.format, "format", "", "Pretty-print services using a Go template")
flags.VarP(&options.filter, "filter", "f", "Filter output based on conditions provided")
return cmd
}
func runList(dockerCli command.Cli, options listOptions) error {
ctx := context.Background()
client := dockerCli.Client()
serviceFilters := options.filter.Value()
services, err := client.ServiceList(ctx, types.ServiceListOptions{Filters: serviceFilters})
if err != nil {
return err
}
sort.Slice(services, func(i, j int) bool {
return sortorder.NaturalLess(services[i].Spec.Name, services[j].Spec.Name)
})
info := map[string]ListInfo{}
if len(services) > 0 && !options.quiet {
// only non-empty services and not quiet, should we call TaskList and NodeList api
taskFilter := filters.NewArgs()
for _, service := range services {
taskFilter.Add("service", service.ID)
}
tasks, err := client.TaskList(ctx, types.TaskListOptions{Filters: taskFilter})
if err != nil {
return err
}
nodes, err := client.NodeList(ctx, types.NodeListOptions{})
if err != nil {
return err
}
info = GetServicesStatus(services, nodes, tasks)
}
format := options.format
if len(format) == 0 {
if len(dockerCli.ConfigFile().ServicesFormat) > 0 && !options.quiet {
format = dockerCli.ConfigFile().ServicesFormat
} else {
format = formatter.TableFormatKey
}
}
servicesCtx := formatter.Context{
Output: dockerCli.Out(),
Format: NewListFormat(format, options.quiet),
}
return ListFormatWrite(servicesCtx, services, info)
}
// GetServicesStatus returns a map of mode and replicas
func GetServicesStatus(services []swarm.Service, nodes []swarm.Node, tasks []swarm.Task) map[string]ListInfo {
running := map[string]int{}
tasksNoShutdown := map[string]int{}
activeNodes := make(map[string]struct{})
for _, n := range nodes {
if n.Status.State != swarm.NodeStateDown {
activeNodes[n.ID] = struct{}{}
}
}
for _, task := range tasks {
if task.DesiredState != swarm.TaskStateShutdown {
tasksNoShutdown[task.ServiceID]++
}
if _, nodeActive := activeNodes[task.NodeID]; nodeActive && task.Status.State == swarm.TaskStateRunning {
running[task.ServiceID]++
}
}
info := map[string]ListInfo{}
for _, service := range services {
info[service.ID] = ListInfo{}
if service.Spec.Mode.Replicated != nil && service.Spec.Mode.Replicated.Replicas != nil {
info[service.ID] = ListInfo{
Mode: "replicated",
Replicas: fmt.Sprintf("%d/%d", running[service.ID], *service.Spec.Mode.Replicated.Replicas),
}
} else if service.Spec.Mode.Global != nil {
info[service.ID] = ListInfo{
Mode: "global",
Replicas: fmt.Sprintf("%d/%d", running[service.ID], tasksNoShutdown[service.ID]),
}
}
}
return info
}