Hi there. I have a deployed rails app. Logs are located in
log/production.log, which I don’t think I’ve configured anywhere.
I can do
fly ssh console and
tail -f log/production.log to see my logs, but I don’t see them in my Fly monitoring dashboard or via
fly logs. All I see there is about my server spinning up or down and listening.
I’m under the impression that I should see them from this section - is this wrong?
I could use
RAILS_LOG_TO_STDOUT, but I’d like to get the log file working. My
fly.toml doesn’t have any details around logging or any
Let me know what other info is needed to help out.
Logging to standard out is how you route your logs to the monitoring dashboard and
fly logs. This is configured in
config/environments/production.rb. If you like you can tell Rails to log to both stdout and log/production.log. More information can be found in Multiple Logs for Resiliency · The Fly Blog
Do you think it’s worth adding
RAILS_LOG_TO_STDOUT in the env of the generated fly.toml for rails projects? I might have messed something up when setting up my project, but it’s been a bit annoying to not log to the dashboard by default.
For reference, this is in my (rails 7) generated
logger = ActiveSupport::Logger.new(STDOUT)
logger.formatter = config.log_formatter
config.logger = ActiveSupport::TaggedLogging.new(logger)
It is added to the Dockerfile that we generate for Rails < 7.1 applications. Rails 7.1 and later will default to stdout.
bin/rails generate dockerfile. More information can be found here: GitHub - fly-apps/dockerfile-rails: Provides a Rails generator to produce Dockerfiles and related files.
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