Set, list, or unset encrypted secrets for a Fly.io app with fly secrets
domain: fly.io · 8 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
Authenticate (fly auth login or -t access token).
Set one or more secrets: `fly secrets set NAME1=value1 NAME2=value2 -a <app>`. Values are stored encrypted and injected as env vars.
Alternatively pipe NAME=VALUE lines from stdin to `fly secrets import` for bulk or non-echoed input.
List current secret names, digests and deployment status with `fly secrets list`.
Remove a secret with `fly secrets unset NAME1 NAME2`.
By default, setting secrets triggers a redeploy so machines pick up the new env. To stage without deploying, use the set/import then `fly secrets deploy` flow.
Sync the local cache of secrets (e.g. if changed elsewhere/dashboard) with `fly secrets sync`.
Docs: https://fly.io/docs/flyctl/secrets/
Known gotchas
Secret names are case sensitive and stored as-is.
Setting a secret redeploys the app by default, which can restart machines unexpectedly during CI.
Never put secret values in steps/logs; they're injected as env vars at runtime only.
Use `fly secrets import` (stdin) when values contain special shell characters to avoid quoting bugs.
There is a limit on total secret size per app; very large values are rejected.
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