Quarkus -> GCP -> datadog log format issues

[sraturi]

Hello,

I have a quarkus application that run on google cloud run. I have a lot of google cloud functions that need to forward logs to datadog so I followed this guide to create minimal gcp structure to forward logs to datadog.

My quarkus application logs also gets forwarded as part of this setup. However, datadog cant seem to process the json correctly. The strucure is something like this, and everything is nested inside jsonPayload.

{
  "logName": "projects/.../logs/run.googleapis.com%2Fstdout",
  "resource": {...},
  "jsonPayload": {
    "threadId": 27,
    "hostName": "localhost",
    "sequence": 574,
    "level": "INFO",
    "loggerClassName": "org.slf4j.impl.Slf4jLogger",
    "processId": 1,
    "processName": "/usr/lib/jvm/java-21-openjdk-21.0.6.0.7-1.el9.x86_64/bin/java",
    "loggerName": "test.abc",
    "message": "Fetched 1 test for user: Sachi",
    "threadName": "vert.x-eventloop-thread-0",
    "timestamp": "2025-09-30T17:55:06.174640548Z"
  },
  "receiveTimestamp": "...",
  "insertId": "...",
  ...
}
 

How would I go about flattening this? I tried using this setup but no luck

 quarkus.log.console.json.enabled=true
quarkus.log.console.json.exception-output-type=formatted

# Map core fields
quarkus.log.console.json.fields.level=severity
quarkus.log.console.json.fields.logger-name=logger
quarkus.log.console.json.fields.thread-name=thread
quarkus.log.console.json.fields.message=message
quarkus.log.console.json.fields.timestamp=timestamp

# Standard Datadog tags
quarkus.log.console.json.additional-field.service=portal
quarkus.log.console.json.additional-field.env=${QUARKUS_PROFILE}
quarkus.log.console.json.additional-field.version=${GIT_COMMIT_HASH}

Quarkus version: 3.28.1

[sraturi]

For context, I am using https://quarkus.io/extensions/io.quarkus/quarkus-logging-json/

[gsmet]

We have two extensions for logging to JSON: one in core that is very basic and another more advanced in the Quarkiverse: https://github.com/quarkiverse/quarkus-logging-json/ .

My guess is that the latter is probably better suited for you.