What are the rules for GCP vm instance's metadata

David Thornton 0
Viewed 66

in my gcloud compute instance create command I'd like to set some metadata:

--metadata=listofstuff=thing1,thing2,thing3

It fails. I can't seem to find any mention of the rules with respect escaping.

Iv'e tried:

--metadata='listofstuff=thing1,thing2,thing3'

--metadata="listofstuff=thing1,thing2,thing3"

--metadata=listofstuff='thing1,thing2,thing3'

--metadata=listofstuff="thing1,thing2,thing3"

--metadata='listofstuff=thing1,thing2,thing3'

--metadata=listofstuff=thing1\,thing2\,thing3

Surly there is a dusty tome somewhere that covers this _very important topic.

gcloud metadata cloud google-cloud-platform
1 Answers

A couple of options:

value:

thing1,thing2,thing3

Note: Be careful to avoid \n etc.

gcloud compute instances add-metadata ${INSTANCE} \
--project=${PROJECT} \
--metadata-from-file=foo=value

See gcloud topic flags-file

flags.yaml:

--metadata:
    bar: "thing1,thing2,thing3"

gcloud compute instances add-metadata ${INSTANCE} \
--project=${PROJECT} \
--flags-file=flags.yaml

And:

gcloud compute instances describe ${INSTANCE} \
--project=${PROJECT} \
--format="json(metadata.items.filter(\"key\":\"foo OR bar\"))"

{
  "metadata": {
    "items": [
      {
        "key": "bar",
        "value": "thing1,thing2,thing3"
      },
      {
        "key": "foo",
        "value": "thing1,thing2,thing3"
      }
    ]
  }
}
DazWilkin0
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