Add UUID to VMs in vSphere input (#4769)

(cherry picked from commit 797fbf7)

plugins/inputs/vsphere/endpoint.go

@@ -60,6 +60,7 @@ type objectMap map[string]objectRef
 
 type objectRef struct {
  name string
+ altID string
  ref types.ManagedObjectReference
  parentRef *types.ManagedObjectReference //Pointer because it must be nillable
  guest string
@@ -470,22 +471,22 @@ func getHosts(ctx context.Context, root *view.ContainerView) (objectMap, error)
 
 func getVMs(ctx context.Context, root *view.ContainerView) (objectMap, error) {
  var resources []mo.VirtualMachine
- err := root.Retrieve(ctx, []string{"VirtualMachine"}, []string{"name", "runtime.host", "config.guestId"}, &resources)
+ err := root.Retrieve(ctx, []string{"VirtualMachine"}, []string{"name", "runtime.host", "config.guestId", "config.uuid"}, &resources)
  if err != nil {
  return nil, err
  }
  m := make(objectMap)
  for _, r := range resources {
- var guest string
+ guest := "unknown"
+ uuid := ""
  // Sometimes Config is unknown and returns a nil pointer
  //
  if r.Config != nil {
  guest = cleanGuestID(r.Config.GuestId)
- } else {
- guest = "unknown"
+ uuid = r.Config.Uuid
  }
  m[r.ExtensibleManagedObject.Reference().Value] = objectRef{
- name: r.Name, ref: r.ExtensibleManagedObject.Reference(), parentRef: r.Runtime.Host, guest: guest}
+ name: r.Name, ref: r.ExtensibleManagedObject.Reference(), parentRef: r.Runtime.Host, guest: guest, altID: uuid}
  }
  return m, nil
 }
@@ -785,6 +786,10 @@ func (e *Endpoint) populateTags(objectRef *objectRef, resourceType string, resou
  t[resource.pKey] = objectRef.name
  }
 
+ if resourceType == "vm" && objectRef.altID != "" {
+ t["uuid"] = objectRef.altID
+ }
+
  // Map parent reference
  parent, found := e.instanceInfo[objectRef.parentRef.Value]
  if found {