Add an orchestrator column in the docker stack ls command

Signed-off-by: Silvin Lubecki <silvin.lubecki@docker.com>

cli/command/formatter/stack.go

@@ -5,9 +5,10 @@ import (
 )
 
 const (
-	defaultStackTableFormat = "table {{.Name}}\t{{.Services}}"
+	defaultStackTableFormat = "table {{.Name}}\t{{.Services}}\t{{.Orchestrator}}"
 
 	stackServicesHeader      = "SERVICES"
+	stackOrchestrastorHeader = "ORCHESTRATOR"
 )
 
 // Stack contains deployed stack information.
@@ -16,6 +17,8 @@ type Stack struct {
 	Name string
 	// Services is the number of the services
 	Services int
+	// Orchestratort is the platform on which the stack is deployed
+	Orchestrator string
 }
 
 // NewStackFormat returns a format for use with a stack Context
@@ -50,6 +53,7 @@ func newStackContext() *stackContext {
 	stackCtx.header = map[string]string{
 		"Name":         nameHeader,
 		"Services":     stackServicesHeader,
+		"Orchestrator": stackOrchestrastorHeader,
 	}
 	return &stackCtx
 }
@@ -65,3 +69,7 @@ func (s *stackContext) Name() string {
 func (s *stackContext) Services() string {
 	return strconv.Itoa(s.s.Services)
 }
+
+func (s *stackContext) Orchestrator() string {
+	return s.s.Orchestrator
+}

cli/command/formatter/stack_test.go

@@ -27,9 +27,9 @@ func TestStackContextWrite(t *testing.T) {
 		// Table format
 		{
 			Context{Format: NewStackFormat("table")},
-			`NAME                SERVICES
-baz                 2
-bar                 1
+			`NAME                SERVICES            ORCHESTRATOR
+baz                 2                   orchestrator1
+bar                 1                   orchestrator2
 `,
 		},
 		{
@@ -49,8 +49,8 @@ bar
 	}
 
 	stacks := []*Stack{
-		{Name: "baz", Services: 2},
-		{Name: "bar", Services: 1},
+		{Name: "baz", Services: 2, Orchestrator: "orchestrator1"},
+		{Name: "bar", Services: 1, Orchestrator: "orchestrator2"},
 	}
 	for _, testcase := range cases {
 		out := bytes.NewBufferString("")

cli/command/stack/kubernetes/list.go

@@ -48,6 +48,7 @@ func getStacks(kubeCli *KubeCli) ([]*formatter.Stack, error) {
 		formattedStacks = append(formattedStacks, &formatter.Stack{
 			Name:         stack.name,
 			Services:     len(stack.getServices()),
+			Orchestrator: "Kubernetes",
 		})
 	}
 	return formattedStacks, nil

cli/command/stack/swarm/list.go

@@ -61,6 +61,7 @@ func getStacks(ctx context.Context, apiclient client.APIClient) ([]*formatter.St
 			m[name] = &formatter.Stack{
 				Name:         name,
 				Services:     1,
+				Orchestrator: "Swarm",
 			}
 		} else {
 			ztack.Services++

cli/command/stack/testdata/stack-list-sort-natural.golden

@@ -1,4 +1,4 @@
-NAME                  SERVICES
-service-name-1-foo    1
-service-name-2-foo    1
-service-name-10-foo   1
+NAME                  SERVICES            ORCHESTRATOR
+service-name-1-foo    1                   Swarm
+service-name-2-foo    1                   Swarm
+service-name-10-foo   1                   Swarm

cli/command/stack/testdata/stack-list-sort.golden

@@ -1,3 +1,3 @@
-NAME                SERVICES
-service-name-bar    1
-service-name-foo    1
+NAME                SERVICES            ORCHESTRATOR
+service-name-bar    1                   Swarm
+service-name-foo    1                   Swarm

cli/command/stack/testdata/stack-list-without-format.golden

@@ -1,2 +1,2 @@
-NAME                SERVICES
-service-name-foo    1
+NAME                SERVICES            ORCHESTRATOR
+service-name-foo    1                   Swarm

docs/reference/commandline/stack_ls.md

@@ -39,9 +39,9 @@ The following command shows all stacks and some additional information:
 ```bash
 $ docker stack ls
 
-ID                 SERVICES
-vossibility-stack  6
-myapp              2
+ID                 SERVICES            ORCHESTRATOR
+myapp              2                   Kubernetes
+vossibility-stack  6                   Swarm
 ```
 
 ### Formatting
@@ -51,9 +51,10 @@ The formatting option (`--format`) pretty-prints stacks using a Go template.
 Valid placeholders for the Go template are listed below:
 
 | Placeholder     | Description        |
-| ----------- | ------------------ |
+| --------------- | ------------------ |
 | `.Name`         | Stack name         |
 | `.Services`     | Number of services |
+| `.Orchestrator` | Orchestrator name  |
 
 When using the `--format` option, the `stack ls` command either outputs
 the data exactly as the template declares or, when using the