I've been using Fly.io to deploy my Elixir API and Postgres database.

These are my notes on helpful commands. Most of these are for debugging purposes.

To view the logs:

$ fly logs -a <app-name>

To deploy with no cache:

$ fly deploy  -a <api-app-name> --remote-only --no-cache

To "rollback" a Fly deployment to a previous version:

$ fly releases --image -a <api-app-name>
$ fly deploy  -a <api-app-name> -i registry.fly.io/your-app-name@sha256-hash

To connect to DB remotely:

$ fly ssh console -a <db-app-name>
$ psql <DATABASE_URL>

To restart the DB:

$ fly postgres restart -a <db-app-name>

To restart the API:

$ fly apps restart <api-app-name>

To restore a database snapshot:

$ fly volumes list -a <db-app-name>

$ fly volumes snapshots list <volume-id>

# scale down
$ fly scale count 0 -a <api-app-name>
 #start back up
$ fly scale count 1 -a <api-app-name>
$ fly deploy --remote-only -a <api-app-name>

$ fly postgres detach <db-app-name>

$ fly postgres attach <db-backup-app-name>