Google VPC Flow Logs: Vital Network Traffic Analysis Tool

Andromeda, the program that runs VPC networks, includes VPC Flow Logs. VPC Flow Logs don’t slow down or affect performance when they’re enabled

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VPC Flow Logs gathers information from all virtual machine instances, including GKE nodes, inside a subnet if it is enabled for that subnet

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TCP, UDP, ICMP, ESP, and GRE traffic are sampled by VPC Flow Logs. Samples are taken of both inbound and outgoing flows

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VPC Flow Logs creates a log for a flow if it is sampled and collected. The details outlined in the Record format section are included in every flow record

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Multiple network interface virtual machines (VMs) are supported by VPC Flow Logs. For every subnet in every VPC that has a network interface

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Intranode visibility for the cluster must be enabled in order to log flows across pods on the same Google Kubernetes Engine (GKE) node

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Aggregation: To create a flow log entry, data from sampling packets is combined over a defined aggregation interval

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