Add maximum replicas per node support to stack version 3.8

Signed-off-by: Olli Janatuinen <olli.janatuinen@gmail.com>

cli/compose/convert/service.go

@@ -158,6 +158,7 @@ func Service(
 			Placement: &swarm.Placement{
 				Constraints: service.Deploy.Placement.Constraints,
 				Preferences: getPlacementPreference(service.Deploy.Placement.Preferences),
+				MaxReplicas: service.Deploy.Placement.MaxReplicas,
 			},
 		},
 		EndpointSpec:   endpoint,

cli/compose/loader/full-example.yml

@@ -1,4 +1,4 @@
-version: "3.7"
+version: "3.8"
 
 services:
   foo:
@@ -82,6 +82,7 @@ services:
         window: 120s
       placement:
         constraints: [node=foo]
+        max_replicas_per_node: 5
         preferences:
           - spread: node.labels.az
       endpoint_mode: dnsrr

cli/compose/loader/full-struct_test.go

@@ -10,7 +10,7 @@ import (
 
 func fullExampleConfig(workingDir, homeDir string) *types.Config {
 	return &types.Config{
-		Version:  "3.7",
+		Version:  "3.8",
 		Services: services(workingDir, homeDir),
 		Networks: networks(),
 		Volumes:  volumes(),
@@ -111,6 +111,7 @@ func services(workingDir, homeDir string) []types.ServiceConfig {
 				},
 				Placement: types.Placement{
 					Constraints: []string{"node=foo"},
+					MaxReplicas: uint64(5),
 					Preferences: []types.PlacementPreferences{
 						{
 							Spread: "node.labels.az",
@@ -507,7 +508,7 @@ func secrets(workingDir string) map[string]types.SecretConfig {
 }
 
 func fullExampleYAML(workingDir string) string {
-	return fmt.Sprintf(`version: "3.7"
+	return fmt.Sprintf(`version: "3.8"
 services:
   foo:
     build:
@@ -588,6 +589,7 @@ services:
         - node=foo
         preferences:
         - spread: node.labels.az
+        max_replicas_per_node: 5
       endpoint_mode: dnsrr
     devices:
     - /dev/ttyUSB0:/dev/ttyUSB0
@@ -1083,7 +1085,8 @@ func fullExampleJSON(workingDir string) string {
             {
               "spread": "node.labels.az"
             }
-          ]
+          ],
+          "max_replicas_per_node": 5
         },
         "endpoint_mode": "dnsrr"
       },
@@ -1383,7 +1386,7 @@ func fullExampleJSON(workingDir string) string {
       "working_dir": "/code"
     }
   },
-  "version": "3.7",
+  "version": "3.8",
   "volumes": {
     "another-volume": {
       "name": "user_specified_name",

cli/compose/schema/bindata.go

@@ -510,44 +510,45 @@ nEbFye/DBpf6q/LNQD4WSf11TQ8obKICc9f36nZ7TfvduKfjbxi9rsq/59X/AwAA//+9o87pcUUAAA==
 
 	"/data/config_schema_v3.8.json": {
 		local:   "data/config_schema_v3.8.json",
-		size:    17777,
+		size:    17835,
 		modtime: 1518458244,
 		compressed: `
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 `,
 	},
 

cli/compose/schema/data/config_schema_v3.8.json

@@ -424,7 +424,8 @@
                 },
                 "additionalProperties": false
               }
-            }
+            },
+            "max_replicas_per_node": {"type": "integer"}
           },
           "additionalProperties": false
         }

cli/compose/types/types.go

@@ -346,6 +346,7 @@ type RestartPolicy struct {
 type Placement struct {
 	Constraints []string               `yaml:",omitempty" json:"constraints,omitempty"`
 	Preferences []PlacementPreferences `yaml:",omitempty" json:"preferences,omitempty"`
+	MaxReplicas uint64                 `mapstructure:"max_replicas_per_node" yaml:"max_replicas_per_node,omitempty" json:"max_replicas_per_node,omitempty"`
 }
 
 // PlacementPreferences is the preferences for a service placement