Route to the nearest Fly Machine region over the private network for low latency
domain: fly.io · 4 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
On the 6PN, resolve the closest started machines: `dig +short aaaa top3.nearest.of.<appname>.internal` (the 3 is an example; use any count up to available machines).
Resolve machines in one specific region explicitly: `<region>.<appname>.internal`, e.g. `sin.<myapp>.internal` for Singapore.
Use `global.<appname>.internal` as an alias for all regions, or plain `<appname>.internal` for every started Machine.
First list available regions with `dig +short txt regions.<appname>.internal`, then use a region name in the AAAA query.
Known gotchas
`nearest.of.` and region-scoped queries only return STARTED machines; stopped ones are excluded from the answer.
'Nearest' is measured from the resolving host's location, so the same query from different regions/peers gives a different ordering.
These names resolve only over the 6PN (on-Machine or via WireGuard VPN); they will not resolve from the public internet.
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