Chronicle cross-customer bucket access

Customers can configure Chronicle to ingest data from customer-owned
Cloud Storage buckets using an ingestion feed. Chronicle previously used a shared
service account for all customers for granting permission to the bucket.
Therefore, one customer's Chronicle instance could be configured to ingest data
from another customer's Cloud Storage bucket. However, this required knowledge
of the bucket URI.

access account can chronicle cloud cloud storage customer customers data feed ingest data instance knowledge permission service service account storage