Stackdriver stdout log message severity

Question

I am using a none supported language on GCP.

Stackdriver logging is great it collects my stdout logs which is most excellent.

However I can't seem to set a severity.

All the documentation pages seem to revolve around sending whole logs.

I would like to know what a message needs to look like when sending it to stdout so it picks up on the severity. An Example would be amazing.

Answer 1

There appears to be some quite good documentation on writing stdout/stderr output from your apps and how this translates to Stackdriver output found here.

If you write a JSON string to output the structure will be parsed.

Documentation on special fields can be found here.

In summary,

• severity
  • DEFAULT
  • DEBUG
  • INFO
  • NOTICE
  • WARNING
  • ERROR
  • CRITICAL
  • ALERT
  • EMERGENCY
• message
• log
• ... others

The content of your output will appear in the jsonPayload field of the Stackdriver record entry.

An example sent to stdout might be:

{
  "severity": "NOTICE",
  "message": "Hello World!",
  "additional-part": "More Data!"
}