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heartbeats for compute nodes?

nova-compute creates "nova-compute" into CC DB.service table and new entry into DB.services table. nova-compute then periodically update DB.services.updated_at and report_count fields.

Any way for CC to know a compute node is restarted or the nova-compute service is restarted? any event notification method than continually polling nova DB in monitoring update_at & report_count?

Thanks -Fred