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gcp-flowlogs-reader
Command line tool and Python library for working with Google Cloud VPC Flow Logs
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
yes VPC flow logs are the way to go. just enable VPC flow logs on the subnets within your interconnect's VPC that you care about and use something like this fab little tool to make querying the logs easier https://github.com/obsrvbl/gcp-flowlogs-reader
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