Tail or fetch application logs for a Fly.io app with fly logs

domain: fly.io · 7 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗

Documented steps

  1. Authenticate with flyctl (fly auth login or FLY_ACCESS_TOKEN / -t).
  2. Run `fly logs` to continuously stream application logs for the current app.
  3. Filter to a single machine with -m/--machine <machine-id> or to all machines in a region with -r/--region <code>.
  4. Fetch only the buffered logs without continuous streaming using -n/--no-tail.
  5. Pick a machine interactively with -s/--select, or select the app with -a/--app.
  6. Get structured output with -j/--json for programmatic parsing.
  7. Docs: https://fly.io/docs/flyctl/logs/

Known gotchas

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