The error message "Access Denied: BigQuery BigQuery: Missing required OAuth scope. Need BigQuery or Cloud Platform write scope" indicates that the issue lies with the OAuth scopes of the GCP VM instance from which you are executing the gcloud commands, not with the permissions of the service account itself. OAuth scopes define the extent of access the VM instance has to Google Cloud services. Even if the service account possesses all the required IAM roles, the VM instance won't be able to perform certain operations on BigQuery if it lacks the appropriate OAuth scopes.
To address this error, you must ensure that the VM instance has the correct OAuth scopes. Here's the procedure:
Checking Current OAuth Scopes
- Verify Current Scopes: Verify the current scopes of your VM instance using the following command:
gcloud compute instances describe [INSTANCE_NAME] --format='value(serviceAccounts[].scopes[])'
Replace [INSTANCE_NAME] with the name of your VM instance.
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Identifying Missing Scopes: If the necessary BigQuery scopes are absent, you'll need to set them. The likely required scopes are:
Modifying OAuth Scopes
Unfortunately, modifying the scopes of an existing VM instance directly is not possible. You'll either need to create a new instance with the correct scopes or stop and edit the existing instance.
Option 1: Creating a New VM Instance with Correct Scopes
- Create New Instance: If creating a new instance, use the
--scopes flag to specify the necessary scopes:
gcloud compute instances create [NEW_INSTANCE_NAME] \ --scopes=https://www.googleapis.com/auth/bigquery,https://www.googleapis.com/auth/cloud-platform \ [OTHER_OPTIONS]
Replace [NEW_INSTANCE_NAME] with the name for your new instance, and [OTHER_OPTIONS] with any other configuration options you need.
- Migrate to New Instance: If you created a new instance, transfer any necessary data or configurations from the old instance to the new one.
Option 2: Stopping and Editing the Existing Instance
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Stop Existing Instance: Stop the existing VM instance using the gcloud compute instances stop [INSTANCE_NAME] command.
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Edit Scope: Edit the instance configuration to include the required OAuth scopes.
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Restart Instance: Restart the instance using the gcloud compute instances start [INSTANCE_NAME] command.
Considerations
Modifying VM instances and their scopes can affect other services and applications running on those instances. Ensure to plan and test accordingly to avoid disruptions.
By following either of the two options described, you should be able to resolve the OAuth scope issue and allow your gcloud commands to interact with BigQuery as expected.
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