CODEWITHSUNDEEP
google-cloud-platformcloudmetadatagcloud
David Thornton
David Thornton

Reputation: 41

What are the rules for GCP vm instance's metadata

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.

Upvotes: 1

Views: 470

Answers (2)

user.dz
user.dz

Reputation: 1032

Fastest approach would be gcloud topic escaping

gcloud compute instances create example-instance1 \
--metadata ^:^key1="value1":key2=value2:key3=value3Index1,value3Index2,valueIndex3:key4=value4

Upvotes: 1

DazWilkin
DazWilkin

Reputation: 40136

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"
      }
    ]
  }
}

Upvotes: 1

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