Thin is a Ruby web server that can handle high levels of concurrency.
Deploying with Thin
To run a Thin web server, add a line to your Procfile labeled as custom_web. Here is an example:
custom_web: bundle exec thin start --socket /tmp/web_server.sock --pid /tmp/web_server.pid -e $RACK_ENV
You can change freely between other supported servers by simply updating your Gems and Procfile.
Don't daemonize custom_web
You should not daemonize the
custom_web process. In other words, please do not use the
-daemonize flags in your initialization string. Please also make sure your config file does not enable daemonization.
We do not support old-style daemonization because it is more reliable to allow the system's process manager (systemd) to handle persistent processes.
Customizing shutdown and reload signals
The default shutdown command for Unicorn servers on Cloud 66 is
HUP and the default shutdown sequence for applications using systemd (our default process manager) is:
quit, 75, int, 15, kill
If you need your web server to shut down using a different command, or in a particular sequence, or with longer or shorter delays, you can define a custom restart sequence in the procfile_metadata section of your Manifest file.
For non-web process signals, please consult our systemd guide.
Controlling Thin via your terminal
You can manage your web server directly from your terminal. Cloud 66 uses the following signals to control Puma via systemd:
Stop the web server
sudo systemctl stop cloud66_web_server.service
Start the web server
sudo systemctl start cloud66_web_server.service
Restart the web server
sudo systemctl restart cloud66_web_server.service