Services: use ServiceStatus on API v1.41 and up

API v1.41 adds a new option to get the number of desired
and running tasks when listing services. This patch enables
this functionality, and provides a fallback mechanism when
the ServiceStatus is not available, which would be when
using an older API version.

Now that the swarm.Service struct captures this information,
the `ListInfo` type is no longer needed, so it is removed,
and the related list- and formatting functions have been
modified accordingly.

To reduce repetition, sorting the services has been moved
to the formatter. This is a slight change in behavior, but
all calls to the formatter performed this sort first, so
the change will not lead to user-facing changes.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/command/service/formatter.go

@@ -16,6 +16,7 @@ import (
 	"github.com/docker/docker/pkg/stringid"
 	units "github.com/docker/go-units"
 	"github.com/pkg/errors"
+	"vbom.ml/util/sortorder"
 )
 
 const serviceInspectPrettyTemplate formatter.Format = `
@@ -520,17 +521,14 @@ func NewListFormat(source string, quiet bool) formatter.Format {
 	return formatter.Format(source)
 }
 
-// ListInfo stores the information about mode and replicas to be used by template
-type ListInfo struct {
-	Mode     string
-	Replicas string
-}
-
 // ListFormatWrite writes the context
-func ListFormatWrite(ctx formatter.Context, services []swarm.Service, info map[string]ListInfo) error {
+func ListFormatWrite(ctx formatter.Context, services []swarm.Service) error {
 	render := func(format func(subContext formatter.SubContext) error) error {
+		sort.Slice(services, func(i, j int) bool {
+			return sortorder.NaturalLess(services[i].Spec.Name, services[j].Spec.Name)
+		})
 		for _, service := range services {
-			serviceCtx := &serviceContext{service: service, mode: info[service.ID].Mode, replicas: info[service.ID].Replicas}
+			serviceCtx := &serviceContext{service: service}
 			if err := format(serviceCtx); err != nil {
 				return err
 			}
@@ -552,8 +550,6 @@ func ListFormatWrite(ctx formatter.Context, services []swarm.Service, info map[s
 type serviceContext struct {
 	formatter.HeaderContext
 	service swarm.Service
-	mode     string
-	replicas string
 }
 
 func (c *serviceContext) MarshalJSON() ([]byte, error) {
@@ -569,11 +565,35 @@ func (c *serviceContext) Name() string {
 }
 
 func (c *serviceContext) Mode() string {
-	return c.mode
+	switch {
+	case c.service.Spec.Mode.Global != nil:
+		return "global"
+	case c.service.Spec.Mode.Replicated != nil:
+		return "replicated"
+	default:
+		return ""
+	}
 }
 
 func (c *serviceContext) Replicas() string {
-	return c.replicas
+	s := &c.service
+
+	var running, desired uint64
+	if s.ServiceStatus != nil {
+		running = c.service.ServiceStatus.RunningTasks
+		desired = c.service.ServiceStatus.DesiredTasks
+	}
+	if r := c.maxReplicas(); r > 0 {
+		return fmt.Sprintf("%d/%d (max %d per node)", running, desired, r)
+	}
+	return fmt.Sprintf("%d/%d", running, desired)
+}
+
+func (c *serviceContext) maxReplicas() uint64 {
+	if c.Mode() != "replicated" || c.service.Spec.TaskTemplate.Placement == nil {
+		return 0
+	}
+	return c.service.Spec.TaskTemplate.Placement.MaxReplicas
 }
 
 func (c *serviceContext) Image() string {

cli/command/service/formatter_test.go

@@ -34,28 +34,36 @@ func TestServiceContextWrite(t *testing.T) {
 		{
 			formatter.Context{Format: NewListFormat("table", false)},
 			`ID                  NAME                MODE                REPLICAS               IMAGE               PORTS
-id_baz              baz                 global              2/4                                     *:80->8080/tcp
+02_bar              bar                 replicated          2/4                                        *:80->8090/udp
-id_bar              bar                 replicated          2/4                                     *:80->8080/tcp
+01_baz              baz                 global              1/3                                        *:80->8080/tcp
+04_qux2             qux2                replicated          3/3 (max 2 per node)                       
+03_qux10            qux10               replicated          2/3 (max 1 per node)                       
 `,
 		},
 		{
 			formatter.Context{Format: NewListFormat("table", true)},
-			`id_baz
+			`02_bar
-id_bar
+01_baz
+04_qux2
+03_qux10
 `,
 		},
 		{
-			formatter.Context{Format: NewListFormat("table {{.Name}}", false)},
+			formatter.Context{Format: NewListFormat("table {{.Name}}\t{{.Mode}}", false)},
-			`NAME
+			`NAME                MODE
-baz
+bar                 replicated
-bar
+baz                 global
+qux2                replicated
+qux10               replicated
 `,
 		},
 		{
 			formatter.Context{Format: NewListFormat("table {{.Name}}", true)},
 			`NAME
-baz
 bar
+baz
+qux2
+qux10
 `,
 		},
 		// Raw Format
@@ -65,15 +73,19 @@ bar
 		},
 		{
 			formatter.Context{Format: NewListFormat("raw", true)},
-			`id: id_baz
+			`id: 02_bar
-id: id_bar
+id: 01_baz
+id: 04_qux2
+id: 03_qux10
 `,
 		},
 		// Custom Format
 		{
 			formatter.Context{Format: NewListFormat("{{.Name}}", false)},
-			`baz
+			`bar
-bar
+baz
+qux2
+qux10
 `,
 		},
 	}
@@ -81,9 +93,12 @@ bar
 	for _, testcase := range cases {
 		services := []swarm.Service{
 			{
-				ID: "id_baz",
+				ID: "01_baz",
 				Spec: swarm.ServiceSpec{
 					Annotations: swarm.Annotations{Name: "baz"},
+					Mode: swarm.ServiceMode{
+						Global: &swarm.GlobalService{},
+					},
 				},
 				Endpoint: swarm.Endpoint{
 					Ports: []swarm.PortConfig{
@@ -95,37 +110,70 @@ bar
 						},
 					},
 				},
+				ServiceStatus: &swarm.ServiceStatus{
+					RunningTasks: 1,
+					DesiredTasks: 3,
+				},
 			},
 			{
-				ID: "id_bar",
+				ID: "02_bar",
 				Spec: swarm.ServiceSpec{
 					Annotations: swarm.Annotations{Name: "bar"},
+					Mode: swarm.ServiceMode{
+						Replicated: &swarm.ReplicatedService{},
+					},
 				},
 				Endpoint: swarm.Endpoint{
 					Ports: []swarm.PortConfig{
 						{
 							PublishMode:   "ingress",
 							PublishedPort: 80,
-							TargetPort:    8080,
+							TargetPort:    8090,
-							Protocol:      "tcp",
+							Protocol:      "udp",
 						},
 					},
 				},
+				ServiceStatus: &swarm.ServiceStatus{
+					RunningTasks: 2,
+					DesiredTasks: 4,
 				},
-		}
-		info := map[string]ListInfo{
-			"id_baz": {
-				Mode:     "global",
-				Replicas: "2/4",
 			},
-			"id_bar": {
+			{
-				Mode:     "replicated",
+				ID: "03_qux10",
-				Replicas: "2/4",
+				Spec: swarm.ServiceSpec{
+					Annotations: swarm.Annotations{Name: "qux10"},
+					Mode: swarm.ServiceMode{
+						Replicated: &swarm.ReplicatedService{},
+					},
+					TaskTemplate: swarm.TaskSpec{
+						Placement: &swarm.Placement{MaxReplicas: 1},
+					},
+				},
+				ServiceStatus: &swarm.ServiceStatus{
+					RunningTasks: 2,
+					DesiredTasks: 3,
+				},
+			},
+			{
+				ID: "04_qux2",
+				Spec: swarm.ServiceSpec{
+					Annotations: swarm.Annotations{Name: "qux2"},
+					Mode: swarm.ServiceMode{
+						Replicated: &swarm.ReplicatedService{},
+					},
+					TaskTemplate: swarm.TaskSpec{
+						Placement: &swarm.Placement{MaxReplicas: 2},
+					},
+				},
+				ServiceStatus: &swarm.ServiceStatus{
+					RunningTasks: 3,
+					DesiredTasks: 3,
+				},
 			},
 		}
 		out := bytes.NewBufferString("")
 		testcase.context.Output = out
-		err := ListFormatWrite(testcase.context, services, info)
+		err := ListFormatWrite(testcase.context, services)
 		if err != nil {
 			assert.Error(t, err, testcase.expected)
 		} else {
@@ -137,9 +185,12 @@ bar
 func TestServiceContextWriteJSON(t *testing.T) {
 	services := []swarm.Service{
 		{
-			ID: "id_baz",
+			ID: "01_baz",
 			Spec: swarm.ServiceSpec{
 				Annotations: swarm.Annotations{Name: "baz"},
+				Mode: swarm.ServiceMode{
+					Global: &swarm.GlobalService{},
+				},
 			},
 			Endpoint: swarm.Endpoint{
 				Ports: []swarm.PortConfig{
@@ -151,11 +202,18 @@ func TestServiceContextWriteJSON(t *testing.T) {
 					},
 				},
 			},
+			ServiceStatus: &swarm.ServiceStatus{
+				RunningTasks: 1,
+				DesiredTasks: 3,
+			},
 		},
 		{
-			ID: "id_bar",
+			ID: "02_bar",
 			Spec: swarm.ServiceSpec{
 				Annotations: swarm.Annotations{Name: "bar"},
+				Mode: swarm.ServiceMode{
+					Replicated: &swarm.ReplicatedService{},
+				},
 			},
 			Endpoint: swarm.Endpoint{
 				Ports: []swarm.PortConfig{
@@ -167,25 +225,19 @@ func TestServiceContextWriteJSON(t *testing.T) {
 					},
 				},
 			},
+			ServiceStatus: &swarm.ServiceStatus{
+				RunningTasks: 2,
+				DesiredTasks: 4,
 			},
-	}
-	info := map[string]ListInfo{
-		"id_baz": {
-			Mode:     "global",
-			Replicas: "2/4",
-		},
-		"id_bar": {
-			Mode:     "replicated",
-			Replicas: "2/4",
 		},
 	}
 	expectedJSONs := []map[string]interface{}{
-		{"ID": "id_baz", "Name": "baz", "Mode": "global", "Replicas": "2/4", "Image": "", "Ports": "*:80->8080/tcp"},
+		{"ID": "02_bar", "Name": "bar", "Mode": "replicated", "Replicas": "2/4", "Image": "", "Ports": "*:80->8080/tcp"},
-		{"ID": "id_bar", "Name": "bar", "Mode": "replicated", "Replicas": "2/4", "Image": "", "Ports": "*:80->8080/tcp"},
+		{"ID": "01_baz", "Name": "baz", "Mode": "global", "Replicas": "1/3", "Image": "", "Ports": "*:80->8080/tcp"},
 	}
 
 	out := bytes.NewBufferString("")
-	err := ListFormatWrite(formatter.Context{Format: "{{json .}}", Output: out}, services, info)
+	err := ListFormatWrite(formatter.Context{Format: "{{json .}}", Output: out}, services)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -199,21 +251,35 @@ func TestServiceContextWriteJSON(t *testing.T) {
 }
 func TestServiceContextWriteJSONField(t *testing.T) {
 	services := []swarm.Service{
-		{ID: "id_baz", Spec: swarm.ServiceSpec{Annotations: swarm.Annotations{Name: "baz"}}},
+		{
-		{ID: "id_bar", Spec: swarm.ServiceSpec{Annotations: swarm.Annotations{Name: "bar"}}},
+			ID: "01_baz",
-	}
+			Spec: swarm.ServiceSpec{
-	info := map[string]ListInfo{
+				Annotations: swarm.Annotations{Name: "baz"},
-		"id_baz": {
+				Mode: swarm.ServiceMode{
-			Mode:     "global",
+					Global: &swarm.GlobalService{},
-			Replicas: "2/4",
+				},
+			},
+			ServiceStatus: &swarm.ServiceStatus{
+				RunningTasks: 2,
+				DesiredTasks: 4,
+			},
+		},
+		{
+			ID: "24_bar",
+			Spec: swarm.ServiceSpec{
+				Annotations: swarm.Annotations{Name: "bar"},
+				Mode: swarm.ServiceMode{
+					Replicated: &swarm.ReplicatedService{},
+				},
+			},
+			ServiceStatus: &swarm.ServiceStatus{
+				RunningTasks: 2,
+				DesiredTasks: 4,
 			},
-		"id_bar": {
-			Mode:     "replicated",
-			Replicas: "2/4",
 		},
 	}
 	out := bytes.NewBufferString("")
-	err := ListFormatWrite(formatter.Context{Format: "{{json .Name}}", Output: out}, services, info)
+	err := ListFormatWrite(formatter.Context{Format: "{{json .Name}}", Output: out}, services)
 	if err != nil {
 		t.Fatal(err)
 	}

cli/command/service/list.go

@@ -2,10 +2,6 @@ package service
 
 import (
 	"context"
-	"fmt"
-	"sort"
-
-	"vbom.ml/util/sortorder"
 
 	"github.com/docker/cli/cli"
 	"github.com/docker/cli/cli/command"
@@ -14,6 +10,7 @@ import (
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/filters"
 	"github.com/docker/docker/api/types/swarm"
+	"github.com/docker/docker/client"
 	"github.com/spf13/cobra"
 )
 
@@ -44,43 +41,49 @@ func newListCommand(dockerCli command.Cli) *cobra.Command {
 	return cmd
 }
 
-func runList(dockerCli command.Cli, options listOptions) error {
+func runList(dockerCli command.Cli, opts listOptions) error {
-	ctx := context.Background()
+	var (
-	client := dockerCli.Client()
+		apiClient = dockerCli.Client()
+		ctx       = context.Background()
+		err       error
+	)
 
-	serviceFilters := options.filter.Value()
+	listOpts := types.ServiceListOptions{
-	services, err := client.ServiceList(ctx, types.ServiceListOptions{Filters: serviceFilters})
+		Filters: opts.filter.Value(),
+		// When not running "quiet", also get service status (number of running
+		// and desired tasks). Note that this is only supported on API v1.41 and
+		// up; older API versions ignore this option, and we will have to collect
+		// the information manually below.
+		Status: !opts.quiet,
+	}
+
+	services, err := apiClient.ServiceList(ctx, listOpts)
 	if err != nil {
 		return err
 	}
 
-	sort.Slice(services, func(i, j int) bool {
+	if listOpts.Status {
-		return sortorder.NaturalLess(services[i].Spec.Name, services[j].Spec.Name)
+		// Now that a request was made, we know what API version was used (either
-	})
+		// through configuration, or after client and daemon negotiated a version).
-	info := map[string]ListInfo{}
+		// If API version v1.41 or up was used; the daemon should already have done
-	if len(services) > 0 && !options.quiet {
+		// the legwork for us, and we don't have to calculate the number of desired
-		// only non-empty services and not quiet, should we call TaskList and NodeList api
+		// and running tasks. On older API versions, we need to do some extra requests
-		taskFilter := filters.NewArgs()
+		// to get that information.
-		for _, service := range services {
+		//
-			taskFilter.Add("service", service.ID)
+		// So theoretically, this step can be skipped based on API version, however,
-		}
+		// some of our unit tests don't set the API version, and there may be other
-
+		// situations where the client uses the "default" version. To account for
-		tasks, err := client.TaskList(ctx, types.TaskListOptions{Filters: taskFilter})
+		// these situations, we do a quick check for services that do not have
+		// a ServiceStatus set, and perform a lookup for those.
+		services, err = AppendServiceStatus(ctx, apiClient, services)
 		if err != nil {
 			return err
 		}
-
-		nodes, err := client.NodeList(ctx, types.NodeListOptions{})
-		if err != nil {
-			return err
 	}
 
-		info = GetServicesStatus(services, nodes, tasks)
+	format := opts.format
-	}
-
-	format := options.format
 	if len(format) == 0 {
-		if len(dockerCli.ConfigFile().ServicesFormat) > 0 && !options.quiet {
+		if len(dockerCli.ConfigFile().ServicesFormat) > 0 && !opts.quiet {
 			format = dockerCli.ConfigFile().ServicesFormat
 		} else {
 			format = formatter.TableFormatKey
@@ -89,54 +92,97 @@ func runList(dockerCli command.Cli, options listOptions) error {
 
 	servicesCtx := formatter.Context{
 		Output: dockerCli.Out(),
-		Format: NewListFormat(format, options.quiet),
+		Format: NewListFormat(format, opts.quiet),
 	}
-	return ListFormatWrite(servicesCtx, services, info)
+	return ListFormatWrite(servicesCtx, services)
 }
 
-// GetServicesStatus returns a map of mode and replicas
+// AppendServiceStatus propagates the ServiceStatus field for "services".
-func GetServicesStatus(services []swarm.Service, nodes []swarm.Node, tasks []swarm.Task) map[string]ListInfo {
+//
-	running := map[string]int{}
+// If API version v1.41 or up is used, this information is already set by the
-	tasksNoShutdown := map[string]int{}
+// daemon. On older API versions, we need to do some extra requests to get
+// that information. Theoretically, this function can be skipped based on API
+// version, however, some of our unit tests don't set the API version, and
+// there may be other situations where the client uses the "default" version.
+// To take these situations into account, we do a quick check for services
+// that don't have ServiceStatus set, and perform a lookup for those.
+// nolint: gocyclo
+func AppendServiceStatus(ctx context.Context, c client.APIClient, services []swarm.Service) ([]swarm.Service, error) {
+	status := map[string]*swarm.ServiceStatus{}
+	taskFilter := filters.NewArgs()
+	for i, s := range services {
+		switch {
+		case s.ServiceStatus != nil:
+			// Server already returned service-status, so we don't
+			// have to look-up tasks for this service.
+			continue
+		case s.Spec.Mode.Replicated != nil:
+			// For replicated services, set the desired number of tasks;
+			// that way we can present this information in case we're unable
+			// to get a list of tasks from the server.
+			services[i].ServiceStatus = &swarm.ServiceStatus{DesiredTasks: *s.Spec.Mode.Replicated.Replicas}
+			status[s.ID] = &swarm.ServiceStatus{}
+			taskFilter.Add("service", s.ID)
+		case s.Spec.Mode.Global != nil:
+			// No such thing as number of desired tasks for global services
+			services[i].ServiceStatus = &swarm.ServiceStatus{}
+			status[s.ID] = &swarm.ServiceStatus{}
+			taskFilter.Add("service", s.ID)
+		default:
+			// Unknown task type
+		}
+	}
+	if len(status) == 0 {
+		// All services have their ServiceStatus set, so we're done
+		return services, nil
+	}
 
+	tasks, err := c.TaskList(ctx, types.TaskListOptions{Filters: taskFilter})
+	if err != nil {
+		return nil, err
+	}
+	if len(tasks) == 0 {
+		return services, nil
+	}
+	activeNodes, err := getActiveNodes(ctx, c)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, task := range tasks {
+		if status[task.ServiceID] == nil {
+			// This should not happen in practice; either all services have
+			// a ServiceStatus set, or none of them.
+			continue
+		}
+		// TODO: this should only be needed for "global" services. Replicated
+		// services have `Spec.Mode.Replicated.Replicas`, which should give this value.
+		if task.DesiredState != swarm.TaskStateShutdown {
+			status[task.ServiceID].DesiredTasks++
+		}
+		if _, nodeActive := activeNodes[task.NodeID]; nodeActive && task.Status.State == swarm.TaskStateRunning {
+			status[task.ServiceID].RunningTasks++
+		}
+	}
+
+	for i, service := range services {
+		if s := status[service.ID]; s != nil {
+			services[i].ServiceStatus = s
+		}
+	}
+	return services, nil
+}
+
+func getActiveNodes(ctx context.Context, c client.NodeAPIClient) (map[string]struct{}, error) {
+	nodes, err := c.NodeList(ctx, types.NodeListOptions{})
+	if err != nil {
+		return nil, err
+	}
 	activeNodes := make(map[string]struct{})
 	for _, n := range nodes {
 		if n.Status.State != swarm.NodeStateDown {
 			activeNodes[n.ID] = struct{}{}
 		}
 	}
-
+	return activeNodes, nil
-	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 {
-			if service.Spec.TaskTemplate.Placement != nil && service.Spec.TaskTemplate.Placement.MaxReplicas > 0 {
-				info[service.ID] = ListInfo{
-					Mode:     "replicated",
-					Replicas: fmt.Sprintf("%d/%d (max %d per node)", running[service.ID], *service.Spec.Mode.Replicated.Replicas, service.Spec.TaskTemplate.Placement.MaxReplicas),
-				}
-			} else {
-				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
 }

cli/command/service/list_test.go

@@ -22,6 +22,7 @@ func TestServiceListOrder(t *testing.T) {
 		},
 	})
 	cmd := newListCommand(cli)
+	cmd.SetArgs([]string{})
 	cmd.Flags().Set("format", "{{.Name}}")
 	assert.NilError(t, cmd.Execute())
 	golden.Assert(t, cli.OutBuffer().String(), "service-list-sort.golden")

cli/command/service/testdata/service-context-write-raw.golden

@@ -1,14 +1,28 @@
-id: id_baz
+id: 02_bar
-name: baz
-mode: global
-replicas: 2/4
-image: 
-ports: *:80->8080/tcp
-
-id: id_bar
 name: bar
 mode: replicated
 replicas: 2/4
 image: 
+ports: *:80->8090/udp
+
+id: 01_baz
+name: baz
+mode: global
+replicas: 1/3
+image: 
 ports: *:80->8080/tcp
 
+id: 04_qux2
+name: qux2
+mode: replicated
+replicas: 3/3 (max 2 per node)
+image: 
+ports: 
+
+id: 03_qux10
+name: qux10
+mode: replicated
+replicas: 2/3 (max 1 per node)
+image: 
+ports: 
+

cli/command/stack/kubernetes/conversion.go

@@ -6,7 +6,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/docker/cli/cli/command/service"
 	"github.com/docker/compose-on-kubernetes/api/labels"
 	"github.com/docker/docker/api/types/filters"
 	"github.com/docker/docker/api/types/swarm"
@@ -154,35 +153,65 @@ const (
 	publishedOnRandomPortSuffix = "-random-ports"
 )
 
-func convertToServices(replicas *appsv1beta2.ReplicaSetList, daemons *appsv1beta2.DaemonSetList, services *apiv1.ServiceList) ([]swarm.Service, map[string]service.ListInfo, error) {
+func convertToServices(replicas *appsv1beta2.ReplicaSetList, daemons *appsv1beta2.DaemonSetList, services *apiv1.ServiceList) ([]swarm.Service, error) {
 	result := make([]swarm.Service, len(replicas.Items))
-	infos := make(map[string]service.ListInfo, len(replicas.Items)+len(daemons.Items))
+
 	for i, r := range replicas.Items {
-		s, err := convertToService(r.Labels[labels.ForServiceName], services, r.Spec.Template.Spec.Containers)
+		s, err := replicatedService(r, services)
 		if err != nil {
-			return nil, nil, err
+			return nil, err
 		}
 		result[i] = *s
-		infos[s.ID] = service.ListInfo{
-			Mode:     "replicated",
-			Replicas: fmt.Sprintf("%d/%d", r.Status.AvailableReplicas, r.Status.Replicas),
-		}
 	}
 	for _, d := range daemons.Items {
-		s, err := convertToService(d.Labels[labels.ForServiceName], services, d.Spec.Template.Spec.Containers)
+		s, err := globalService(d, services)
 		if err != nil {
-			return nil, nil, err
+			return nil, err
 		}
 		result = append(result, *s)
-		infos[s.ID] = service.ListInfo{
-			Mode:     "global",
-			Replicas: fmt.Sprintf("%d/%d", d.Status.NumberReady, d.Status.DesiredNumberScheduled),
-		}
 	}
 	sort.Slice(result, func(i, j int) bool {
 		return result[i].ID < result[j].ID
 	})
-	return result, infos, nil
+	return result, nil
+}
+
+func uint64ptr(i int32) *uint64 {
+	var o uint64
+	if i > 0 {
+		o = uint64(i)
+	}
+	return &o
+}
+
+func replicatedService(r appsv1beta2.ReplicaSet, services *apiv1.ServiceList) (*swarm.Service, error) {
+	s, err := convertToService(r.Labels[labels.ForServiceName], services, r.Spec.Template.Spec.Containers)
+	if err != nil {
+		return nil, err
+	}
+	s.Spec.Mode = swarm.ServiceMode{
+		Replicated: &swarm.ReplicatedService{Replicas: uint64ptr(r.Status.Replicas)},
+	}
+	s.ServiceStatus = &swarm.ServiceStatus{
+		RunningTasks: uint64(r.Status.AvailableReplicas),
+		DesiredTasks: uint64(r.Status.Replicas),
+	}
+	return s, nil
+}
+
+func globalService(d appsv1beta2.DaemonSet, services *apiv1.ServiceList) (*swarm.Service, error) {
+	s, err := convertToService(d.Labels[labels.ForServiceName], services, d.Spec.Template.Spec.Containers)
+	if err != nil {
+		return nil, err
+	}
+	s.Spec.Mode = swarm.ServiceMode{
+		Global: &swarm.GlobalService{},
+	}
+	s.ServiceStatus = &swarm.ServiceStatus{
+		RunningTasks: uint64(d.Status.NumberReady),
+		DesiredTasks: uint64(d.Status.DesiredNumberScheduled),
+	}
+	return s, nil
 }
 
 func convertToService(serviceName string, services *apiv1.ServiceList, containers []apiv1.Container) (*swarm.Service, error) {

cli/command/stack/kubernetes/conversion_test.go

@@ -3,7 +3,6 @@ package kubernetes
 import (
 	"testing"
 
-	"github.com/docker/cli/cli/command/service"
 	"github.com/docker/compose-on-kubernetes/api/labels"
 	"github.com/docker/docker/api/types/swarm"
 	"gotest.tools/assert"
@@ -19,49 +18,45 @@ func TestReplicasConversionNeedsAService(t *testing.T) {
 		Items: []appsv1beta2.ReplicaSet{makeReplicaSet("unknown", 0, 0)},
 	}
 	services := apiv1.ServiceList{}
-	_, _, err := convertToServices(&replicas, &appsv1beta2.DaemonSetList{}, &services)
+	_, err := convertToServices(&replicas, &appsv1beta2.DaemonSetList{}, &services)
 	assert.ErrorContains(t, err, "could not find service")
 }
 
 func TestKubernetesServiceToSwarmServiceConversion(t *testing.T) {
 	testCases := []struct {
+		doc              string
 		replicas         *appsv1beta2.ReplicaSetList
 		services         *apiv1.ServiceList
 		expectedServices []swarm.Service
-		expectedListInfo map[string]service.ListInfo
 	}{
-		// Match replicas with headless stack services
 		{
-			&appsv1beta2.ReplicaSetList{
+			doc: "Match replicas with headless stack services",
+			replicas: &appsv1beta2.ReplicaSetList{
 				Items: []appsv1beta2.ReplicaSet{
 					makeReplicaSet("service1", 2, 5),
 					makeReplicaSet("service2", 3, 3),
 				},
 			},
-			&apiv1.ServiceList{
+			services: &apiv1.ServiceList{
 				Items: []apiv1.Service{
 					makeKubeService("service1", "stack", "uid1", apiv1.ServiceTypeClusterIP, nil),
 					makeKubeService("service2", "stack", "uid2", apiv1.ServiceTypeClusterIP, nil),
 					makeKubeService("service3", "other-stack", "uid2", apiv1.ServiceTypeClusterIP, nil),
 				},
 			},
-			[]swarm.Service{
+			expectedServices: []swarm.Service{
-				makeSwarmService("stack_service1", "uid1", nil),
+				makeSwarmService(t, "stack_service1", "uid1", withMode("replicated", 5), withStatus(2, 5)),
-				makeSwarmService("stack_service2", "uid2", nil),
+				makeSwarmService(t, "stack_service2", "uid2", withMode("replicated", 3), withStatus(3, 3)),
-			},
-			map[string]service.ListInfo{
-				"uid1": {Mode: "replicated", Replicas: "2/5"},
-				"uid2": {Mode: "replicated", Replicas: "3/3"},
 			},
 		},
-		// Headless service and LoadBalancer Service are tied to the same Swarm service
 		{
-			&appsv1beta2.ReplicaSetList{
+			doc: "Headless service and LoadBalancer Service are tied to the same Swarm service",
+			replicas: &appsv1beta2.ReplicaSetList{
 				Items: []appsv1beta2.ReplicaSet{
 					makeReplicaSet("service", 1, 1),
 				},
 			},
-			&apiv1.ServiceList{
+			services: &apiv1.ServiceList{
 				Items: []apiv1.Service{
 					makeKubeService("service", "stack", "uid1", apiv1.ServiceTypeClusterIP, nil),
 					makeKubeService("service-published", "stack", "uid2", apiv1.ServiceTypeLoadBalancer, []apiv1.ServicePort{
@@ -73,29 +68,26 @@ func TestKubernetesServiceToSwarmServiceConversion(t *testing.T) {
 					}),
 				},
 			},
-			[]swarm.Service{
+			expectedServices: []swarm.Service{
-				makeSwarmService("stack_service", "uid1", []swarm.PortConfig{
+				makeSwarmService(t, "stack_service", "uid1",
-					{
+					withMode("replicated", 1),
+					withStatus(1, 1), withPort(swarm.PortConfig{
 						PublishMode:   swarm.PortConfigPublishModeIngress,
 						PublishedPort: 80,
 						TargetPort:    80,
 						Protocol:      swarm.PortConfigProtocolTCP,
-					},
 					}),
-			},
+				),
-			map[string]service.ListInfo{
-				"uid1": {Mode: "replicated", Replicas: "1/1"},
 			},
 		},
-		// Headless service and NodePort Service are tied to the same Swarm service
-
 		{
-			&appsv1beta2.ReplicaSetList{
+			doc: "Headless service and NodePort Service are tied to the same Swarm service",
+			replicas: &appsv1beta2.ReplicaSetList{
 				Items: []appsv1beta2.ReplicaSet{
 					makeReplicaSet("service", 1, 1),
 				},
 			},
-			&apiv1.ServiceList{
+			services: &apiv1.ServiceList{
 				Items: []apiv1.Service{
 					makeKubeService("service", "stack", "uid1", apiv1.ServiceTypeClusterIP, nil),
 					makeKubeService("service-random-ports", "stack", "uid2", apiv1.ServiceTypeNodePort, []apiv1.ServicePort{
@@ -107,27 +99,28 @@ func TestKubernetesServiceToSwarmServiceConversion(t *testing.T) {
 					}),
 				},
 			},
-			[]swarm.Service{
+			expectedServices: []swarm.Service{
-				makeSwarmService("stack_service", "uid1", []swarm.PortConfig{
+				makeSwarmService(t, "stack_service", "uid1",
-					{
+					withMode("replicated", 1),
+					withStatus(1, 1),
+					withPort(swarm.PortConfig{
 						PublishMode:   swarm.PortConfigPublishModeHost,
 						PublishedPort: 35666,
 						TargetPort:    80,
 						Protocol:      swarm.PortConfigProtocolTCP,
-					},
 					}),
-			},
+				),
-			map[string]service.ListInfo{
-				"uid1": {Mode: "replicated", Replicas: "1/1"},
 			},
 		},
 	}
 
 	for _, tc := range testCases {
-		swarmServices, listInfo, err := convertToServices(tc.replicas, &appsv1beta2.DaemonSetList{}, tc.services)
+		tc := tc
+		t.Run(tc.doc, func(t *testing.T) {
+			swarmServices, err := convertToServices(tc.replicas, &appsv1beta2.DaemonSetList{}, tc.services)
 			assert.NilError(t, err)
 			assert.DeepEqual(t, tc.expectedServices, swarmServices)
-		assert.DeepEqual(t, tc.expectedListInfo, listInfo)
+		})
 	}
 }
 
@@ -172,8 +165,46 @@ func makeKubeService(service, stack, uid string, serviceType apiv1.ServiceType,
 	}
 }
 
-func makeSwarmService(service, id string, ports []swarm.PortConfig) swarm.Service {
+func withMode(mode string, replicas uint64) func(*swarm.Service) {
-	return swarm.Service{
+	return func(service *swarm.Service) {
+		switch mode {
+		case "global":
+			service.Spec.Mode = swarm.ServiceMode{
+				Global: &swarm.GlobalService{},
+			}
+		case "replicated":
+			service.Spec.Mode = swarm.ServiceMode{
+				Replicated: &swarm.ReplicatedService{Replicas: &replicas},
+			}
+			withStatus(0, replicas)
+		default:
+			service.Spec.Mode = swarm.ServiceMode{}
+			withStatus(0, 0)
+		}
+	}
+}
+
+func withPort(port swarm.PortConfig) func(*swarm.Service) {
+	return func(service *swarm.Service) {
+		if service.Endpoint.Ports == nil {
+			service.Endpoint.Ports = make([]swarm.PortConfig, 0)
+		}
+		service.Endpoint.Ports = append(service.Endpoint.Ports, port)
+	}
+}
+
+func withStatus(running, desired uint64) func(*swarm.Service) {
+	return func(service *swarm.Service) {
+		service.ServiceStatus = &swarm.ServiceStatus{
+			RunningTasks: running,
+			DesiredTasks: desired,
+		}
+	}
+}
+
+func makeSwarmService(t *testing.T, service, id string, opts ...func(*swarm.Service)) swarm.Service {
+	t.Helper()
+	s := swarm.Service{
 		ID: id,
 		Spec: swarm.ServiceSpec{
 			Annotations: swarm.Annotations{
@@ -185,8 +216,9 @@ func makeSwarmService(service, id string, ports []swarm.PortConfig) swarm.Servic
 				},
 			},
 		},
-		Endpoint: swarm.Endpoint{
-			Ports: ports,
-		},
 	}
+	for _, o := range opts {
+		o(&s)
+	}
+	return s
 }

cli/command/stack/kubernetes/services.go

@@ -109,16 +109,12 @@ func RunServices(dockerCli *KubeCli, opts options.Services) error {
 	}
 
 	// Convert Replicas sets and kubernetes services to swarm services and formatter information
-	services, info, err := convertToServices(replicasList, daemonsList, servicesList)
+	services, err := convertToServices(replicasList, daemonsList, servicesList)
 	if err != nil {
 		return err
 	}
 	services = filterServicesByName(services, filters.Get("name"), stackName)
 
-	if opts.Quiet {
-		info = map[string]service.ListInfo{}
-	}
-
 	format := opts.Format
 	if len(format) == 0 {
 		if len(dockerCli.ConfigFile().ServicesFormat) > 0 && !opts.Quiet {
@@ -132,7 +128,7 @@ func RunServices(dockerCli *KubeCli, opts options.Services) error {
 		Output: dockerCli.Out(),
 		Format: service.NewListFormat(format, opts.Quiet),
 	}
-	return service.ListFormatWrite(servicesCtx, services, info)
+	return service.ListFormatWrite(servicesCtx, services)
 }
 
 func filterServicesByName(services []swarm.Service, names []string, stackName string) []swarm.Service {

cli/command/stack/swarm/services.go

@@ -3,55 +3,59 @@ package swarm
 import (
 	"context"
 	"fmt"
-	"sort"
 
 	"github.com/docker/cli/cli/command"
 	"github.com/docker/cli/cli/command/service"
 	"github.com/docker/cli/cli/command/stack/formatter"
 	"github.com/docker/cli/cli/command/stack/options"
 	"github.com/docker/docker/api/types"
-	"github.com/docker/docker/api/types/filters"
-	"vbom.ml/util/sortorder"
 )
 
 // RunServices is the swarm implementation of docker stack services
 func RunServices(dockerCli command.Cli, opts options.Services) error {
-	ctx := context.Background()
+	var (
-	client := dockerCli.Client()
+		err    error
+		ctx    = context.Background()
+		client = dockerCli.Client()
+	)
 
-	filter := getStackFilterFromOpt(opts.Namespace, opts.Filter)
+	listOpts := types.ServiceListOptions{
-	services, err := client.ServiceList(ctx, types.ServiceListOptions{Filters: filter})
+		Filters: getStackFilterFromOpt(opts.Namespace, opts.Filter),
+		// When not running "quiet", also get service status (number of running
+		// and desired tasks). Note that this is only supported on API v1.41 and
+		// up; older API versions ignore this option, and we will have to collect
+		// the information manually below.
+		Status: !opts.Quiet,
+	}
+
+	services, err := client.ServiceList(ctx, listOpts)
 	if err != nil {
 		return err
 	}
 
 	// if no services in this stack, print message and exit 0
 	if len(services) == 0 {
-		fmt.Fprintf(dockerCli.Err(), "Nothing found in stack: %s\n", opts.Namespace)
+		_, _ = fmt.Fprintf(dockerCli.Err(), "Nothing found in stack: %s\n", opts.Namespace)
 		return nil
 	}
 
-	sort.Slice(services, func(i, j int) bool {
+	if listOpts.Status {
-		return sortorder.NaturalLess(services[i].Spec.Name, services[j].Spec.Name)
+		// Now that a request was made, we know what API version was used (either
-	})
+		// through configuration, or after client and daemon negotiated a version).
-	info := map[string]service.ListInfo{}
+		// If API version v1.41 or up was used; the daemon should already have done
-	if !opts.Quiet {
+		// the legwork for us, and we don't have to calculate the number of desired
-		taskFilter := filters.NewArgs()
+		// and running tasks. On older API versions, we need to do some extra requests
-		for _, service := range services {
+		// to get that information.
-			taskFilter.Add("service", service.ID)
+		//
-		}
+		// So theoretically, this step can be skipped based on API version, however,
-
+		// some of our unit tests don't set the API version, and there may be other
-		tasks, err := client.TaskList(ctx, types.TaskListOptions{Filters: taskFilter})
+		// situations where the client uses the "default" version. To account for
+		// these situations, we do a quick check for services that do not have
+		// a ServiceStatus set, and perform a lookup for those.
+		services, err = service.AppendServiceStatus(ctx, client, services)
 		if err != nil {
 			return err
 		}
-
-		nodes, err := client.NodeList(ctx, types.NodeListOptions{})
-		if err != nil {
-			return err
-		}
-
-		info = service.GetServicesStatus(services, nodes, tasks)
 	}
 
 	format := opts.Format
@@ -67,5 +71,5 @@ func RunServices(dockerCli command.Cli, opts options.Services) error {
 		Output: dockerCli.Out(),
 		Format: service.NewListFormat(format, opts.Quiet),
 	}
-	return service.ListFormatWrite(servicesCtx, services, info)
+	return service.ListFormatWrite(servicesCtx, services)
 }