Cloud Storage object finalize event not triggering gen2 function

[mattscheurichpatou]

I recently deployed some previously gen1 functions to gen2, and I note that one of my functions that subscribes to the google.cloud.storage.object.v1.finalized event is not triggering when objects are uploaded to the bucket.

I deploy my gen2 functions using gcloud, and the command looks something like this:

gcloud functions deploy "exampleFn" \
  --quiet \
  --gen2 \
  --entry-point="exampleFn" \
  --project="..." \
  --region="europe-west1" \
  --runtime="nodejs22" \
  --timeout="540s" \
  --memory="2048Mi" \
  --ingress-settings="internal-only" \
  --trigger-resource="example-bucket" \
  --trigger-location="eu" \
  --trigger-event="google.cloud.storage.object.v1.finalized" \
  --service-account="...@....iam.gserviceaccount.com" \
  --update-labels="..." \
  --source="..." \
  --env-vars-file="..."

It seems the Eventarc trigger was created in relation to the above command, but I cannot for the life of me trigger the event when I upload files to the bucket.

The bucket resides in eu and the trigger location was set to eu — the function itself is in europe-west1, so I’m unsure if that’s an issue.

I also set ingress-settings to internal-only, so maybe that’s my problem, however I figured it should have worked considering it is Google turtles all the way down.

[mattscheurichpatou]

Seems like the issue was that my Cloud Run function service account did not have the roles/eventarc.eventReceiver role attached. Which is a bit weird, as I had a custom role that had the permissions from this role already added

Edit: actually my issue was that I wasn’t using the correct event: it should have been google.storage.object.finalize when using gcloud functions deploy --trigger-event. Using gcloud functions event-types list clarified which acceptable events I could use.