When you’re debugging a web service, it’s handy if you can get all the log entries associated with a single HTTP request. This is easy if you generate a unique ID for each request and include it in all the log entries. If your services calls other services, you can build a simple tracing system by including this ID in all those calls. If you’re using nginx as a reverse proxy, you can use it to generate the IDs.1 At work, we’re using the Tornado web framework in Python and we wanted to...
