Deploy failing for Rails 8 app

1

Hi. I have a simple Rails 8 app which I am suddenly not able to deploy anymore.

Running ‘fly deploy’ fails with this:

Running release_command: bin/rails fly:release
Starting machine

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 ✖ release_command failed
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Error release_command failed running on machine 32876703b56e68 with exit code 1.
Checking logs: fetching the last 100 lines below:
2025-03-17T07:09:45Z 2025-03-17T07:09:45.299968328 [01JPHEZ9C4NTB00ZESMY5NP354:main] Running Firecracker v1.7.0
2025-03-17T07:09:46Z  INFO Starting init (commit: d15e62a13)...
2025-03-17T07:09:46Z  INFO Preparing to run: `/rails/bin/docker-entrypoint bin/rails fly:release` as 1000
2025-03-17T07:09:46Z  INFO [fly api proxy] listening at /.fly/api
2025-03-17T07:09:46Z Machine started in 1.026s
2025-03-17T07:09:46Z 2025/03/17 07:09:46 INFO SSH listening listen_address=[fdaa:0:97e5:a7b:3a0:b103:63d:2]:22
2025-03-17T07:09:48Z Unrecognized command "fly:release" (Rails::Command::UnrecognizedCommandError)
2025-03-17T07:09:48Z  INFO Main child exited normally with code: 1
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Error: release command failed - aborting deployment. machine 32876703b56e68 exited with non-zero status of 1

Can anyone point me in the right directions in order to solve this?

2

This looks like a command in your framework. Can you see where it is defined in your app? It will be in your source code, or maybe in a Ruby plugin that you’ve installed.

3

Thanks! It was defined in my fly.toml. Removing it from this files solved the issue.

4

Presumably you are using PostgreSQL? If so, at this point you likely are no longer running migrations before every deploy. What you should have in your fly.toml is this:

5

Thanks, postgresql it is

6

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