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# generals
Slackbot
03/17/2023, 5:17 PMThis message was deleted.
h
Harald Fielker
03/17/2023, 5:17 PM Copy code
const extra = { extra : { duno: "foo", whatever: "bar" } };
app.listen(port, () => {
logger.log('info', 'Example app listening at <http://localhost>:%d', port, extra);
});Harald Fielker
03/17/2023, 5:19 PMIs there a way to extract this or let my use it in queries?
Harald Fielker
03/17/2023, 5:20 PMin DDog I used to put in here stuff like the
batch_idcustomer_ids
Srikanth Chekuri
03/17/2023, 5:53 PMh
Harald Fielker
03/17/2023, 6:02 PMWill this also work? https://www.npmjs.com/package/@opentelemetry/instrumentation-winston
s
Srikanth Chekuri
03/17/2023, 6:03 PMYes, that will help for injecting trace context which will help in correlation
h
Harald Fielker
03/17/2023, 6:03 PMor does this only work, because trace_id, span_id and trace_flags is already part of the collector ?
Harald Fielker
03/17/2023, 6:04 PMbtw. I have no issue just talking to the collector via IP - metrics already need this hack
s
Srikanth Chekuri
03/17/2023, 6:04 PMAs you can see from the description, it is your winston logger + trace context injected.
h
Harald Fielker
03/17/2023, 6:08 PMI think this just adds the 3 fields to
<http://logger.info|logger.info>( ...Harald Fielker
03/17/2023, 6:09 PMI go with the userguide you send me 🙂