GAE node.js console.error() not logging as ERROR log level

Question

• google app-engine standard
• runtime: nodejs10

I'm not sure how I'm messing this up since it seems so simple. According to the app engine standard documentation:

console.error('message');

Should have the ERROR log level in the Stackdriver Logs Viewer. However, I see the log level set to "Any log level." What does seem correct is it's logging to stderr as seen from the logName.

logName:  "projects/my-project-name/logs/stderr"  

To quote:

To emit a log item from your Node.js app, you can use the console.log() or console.error() functions, which have the following log levels:

• Items emitted with console.log() have the INFO log level.
• Items emitted with console.error() have the ERROR log level.
• Internal system messages have the DEBUG log level.

I was originally trying to get winston to work with Stackdriver (using @google-cloud/logging-winston) to get more granular logging levels, but right now I can't even get it to log at INFO or ERROR with basic console.log() and console.error().

Hope I don't have to write a crazy custom transport just to use plain console.error().

Answer 1

After trying for hours, I got it working. I used Winston as per the docs https://cloud.google.com/logging/docs/setup/nodejs#using_winston.

Then in stackdriver logs viewer, I selected the winston_log from the dropdown like this -

And its showing error logs now.

This works with Bunyan too. You have to select bunyan_log for the Bunyan.

Hope this helps someone:)