Datadog bills for hosts running the Agent and all GCE instances picked up by the Google Cloud integration. You are not billed twice if you are running the Agent on a GCE instance picked up by the Google Cloud integration.
Other Google Cloud resources (CloudSQL, Google App Engine, Pub/Sub, etc.) are not part of monthly billing.
Use the Google Cloud integration tile to control your metric collection. Go to the Configuration tab and select a project or add a new one. Each project is controlled under Optionally Limit Metrics Collection to hosts with tag. Limit metrics by host tag:
When adding limits to existing Google Cloud projects within the integration tile, the previously discovered instances could stay in the Infrastructure List up to 2 hours. During the transition period, GCE instances display a status of
???. This does not count towards your billing.
Hosts with a running Agent still display and are included in billing. Using the limit option is only applicable to GCE instances without a running Agent.
For technical questions, contact Datadog support.
For billing questions, contact your Customer Success Manager.