How to specify a disk type for workers in Google Dataflow?

Question

In the doc there is a option workerDiskType but I can't make it work. I tried to use persistent SSD. Each time I try something I get a 400 http code without explanation.

I tried all of those values:

• zones/$ZONE/diskTypes/pd-ssd
• zones/$ZONE/disks/pd-ssd
• projects/$PROJECT/zones/$ZONE/diskTypes/pd-ssd
• projects/$PROJECT/zones/$ZONE/disks/pd-ssd

What is the correct format? Does this option works?

The answer I have from Dataflow is not really helpful:

{
  "code" : 400,
  "errors" : [ {
    "domain" : "global",
    "message" : "Request contains an invalid argument.",
    "reason" : "badRequest"
  } ],
  "message" : "Request contains an invalid argument.",
  "status" : "INVALID_ARGUMENT"
}

Answer 1

"compute.googleapis.com/projects//zones//diskTypes/pd-ssd" is the correct identifier for SSDs