fn-serverless/docs/operating/logging.md

Logging

There are a few things to note about what Oracle Functions logs.

Logspout

We recommend using logspout to forward your logs to a log aggregator of your choice.

Format

All logs are emitted in logfmt format for easy parsing.

Call ID

Every function call/request is assigned a call_id. If you search your logs, you can track all the activity for each function call and find errors on a call by call basis. For example, these are the log lines for an aynschronous function call:

Note the easily searchable call_id=x format.

call_id=477949e2-922c-5da9-8633-0b2887b79f6e

Metrics

Metrics are emitted via the logs.

See Metrics doc for more information.