PostgreSQL Network Filter for EnvoyProxy
summary
An Envoy network filter that decodes the PostgreSQL frontend/backend protocol to extract metrics and metadata without installing DB-side instrumentation. It shows how to deploy and use the open-source Envoy extension (C++ Envoy proxy) to capture automated observability and debug network traffic for PostgreSQL, and outlines future work including SSL termination, a Postgres parser for per-query tracking, and traffic mirroring for upgrades.
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