api: add service block provider parameter.

api/jobs_test.go

@@ -742,6 +742,7 @@ func TestJobs_Canonicalize(t *testing.T) {
 										PortLabel:   "db",
 										AddressMode: "auto",
 										OnUpdate:    "require_healthy",
+										Provider:    "consul",
 										Checks: []ServiceCheck{
 											{
 												Name:     "alive",

api/services.go

@@ -116,12 +116,21 @@ type Service struct {
 	CanaryMeta        map[string]string `hcl:"canary_meta,block"`
 	TaskName          string            `mapstructure:"task" hcl:"task,optional"`
 	OnUpdate          string            `mapstructure:"on_update" hcl:"on_update,optional"`
+
+	// Provider defines which backend system provides the service registration
+	// mechanism for this service. This supports either structs.ProviderConsul
+	// or structs.ProviderNomad and defaults for the former.
+	Provider string `hcl:"provider,optional"`
 }
 
 const (
 	OnUpdateRequireHealthy = "require_healthy"
 	OnUpdateIgnoreWarn     = "ignore_warnings"
 	OnUpdateIgnore         = "ignore"
+
+	// ServiceProviderConsul is the default provider for services when no
+	// parameter is set.
+	ServiceProviderConsul = "consul"
 )
 
 // Canonicalize the Service by ensuring its name and address mode are set. Task
@@ -145,6 +154,11 @@ func (s *Service) Canonicalize(t *Task, tg *TaskGroup, job *Job) {
 		s.OnUpdate = OnUpdateRequireHealthy
 	}
 
+	// Default the service provider.
+	if s.Provider == "" {
+		s.Provider = ServiceProviderConsul
+	}
+
 	s.Connect.Canonicalize()
 
 	// Canonicalize CheckRestart on Checks and merge Service.CheckRestart

api/services_test.go

@@ -21,6 +21,7 @@ func TestService_Canonicalize(t *testing.T) {
 	require.Equal(t, fmt.Sprintf("%s-%s-%s", *j.Name, *tg.Name, task.Name), s.Name)
 	require.Equal(t, "auto", s.AddressMode)
 	require.Equal(t, OnUpdateRequireHealthy, s.OnUpdate)
+	require.Equal(t, ServiceProviderConsul, s.Provider)
 }
 
 func TestServiceCheck_Canonicalize(t *testing.T) {