medium10 pts · first answer countsobservabilitytracing

Following one request across services

A request goes through an API gateway, an orders service and a payments service. When it fails, you cannot connect the logs from the three services. What should you add?

A.Write every service's logs into one shared fileB.Raise the log level to DEBUG everywhereC.Synchronise all server clocks with NTP and match log lines across services by their timestampsD.Propagate a trace context (W3C traceparent, e.g. via OpenTelemetry) and log the trace id

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Following one request across services

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