Description
When running on App Engine (and potentially other platforms in the future), we should send along the trace context when writing logs. This context is available in the HTTP request headers as X-Cloud-Trace-Context and should be passed in the structured log as the traceId. For more details, read here.
Since this is a web request header, we will need to make the core of this web application-framework agnostic. We'll then need to write helpers/adaptors for Flask and Django.
To my knowledge, we have one blocking bug (#2997) that needs to be resolved before this can happen. Secondly, we need to agree on where the framework helpers should live. (@dhermes). I'm not aware of any other blockers.
Assigned to initially @waprin, as he currently has the most context and can hopefully address open questions and point out any additional pre-work that needs to be done. @liyanhui1228 and @duggelz are the product owners for this, and have offered to provide the implementation.