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Practical lessons, patterns, and trade-offs from teams building production data platforms across Australia and New Zealand.
Static egress IPs for Postgres on Fly.io: an Envoy egress proxy
Fly Machines do not have stable outbound IPs by default — a problem when your Postgres provider (ClickHouse Cloud, PlanetScale, Neon, RDS, and others) expects a short IP allowlist. This post walks through a production pattern: a dedicated Fly app running Envoy as an L4 TCP egress proxy so every consumer exits from one or two static addresses you whitelist once, with separate paths for direct Postgres (5432) and ClickHouse managed PgBouncer (6432).
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