Warn if IOPS is being used

command/agent/job_endpoint.go

@@ -853,6 +853,7 @@ func ApiResourcesToStructs(in *api.Resources) *structs.Resources {
 	out := &structs.Resources{
 		CPU:      *in.CPU,
 		MemoryMB: *in.MemoryMB,
+		IOPS:     *in.IOPS, // COMPAT(0.10): Only being used to issue warnings
 	}
 
 	if l := len(in.Networks); l != 0 {

nomad/structs/structs.go

@@ -1698,6 +1698,7 @@ type Resources struct {
 	CPU      int
 	MemoryMB int
 	DiskMB   int
+	IOPS     int // COMPAT(0.10): Only being used to issue warnings
 	Networks Networks
 	Devices  []*RequestedDevice
 }
@@ -4663,6 +4664,13 @@ func (tg *TaskGroup) Warnings(j *Job) error {
 		}
 	}
 
+	for _, t := range tg.Tasks {
+		if err := t.Warnings(); err != nil {
+			err = multierror.Prefix(err, fmt.Sprintf("Task %q:", t.Name))
+			mErr.Errors = append(mErr.Errors, err)
+		}
+	}
+
 	return mErr.ErrorOrNil()
 }
 
@@ -5506,6 +5514,17 @@ func validateServices(t *Task) error {
 	return mErr.ErrorOrNil()
 }
 
+func (t *Task) Warnings() error {
+	var mErr multierror.Error
+
+	// Validate the resources
+	if t.Resources != nil && t.Resources.IOPS != 0 {
+		mErr.Errors = append(mErr.Errors, fmt.Errorf("IOPS has been deprecated as of Nomad 0.9.0. Please remove IOPS from resource stanza."))
+	}
+
+	return mErr.ErrorOrNil()
+}
+
 const (
 	// TemplateChangeModeNoop marks that no action should be taken if the
 	// template is re-rendered