Sending Delta to Prometheus
summary
A new Delta-to-cumulative processor in the OpenTelemetry Collector converts delta temporal metrics into Prometheus-style cumulative counters, shipped in the official otel contrib binaries two weeks ago. Setup uses an OpenTelemetry SDK emitting the same random values as a gauge and a sum, the collector processor, and Prometheus with remote_write enabled. The converted series produces monotonic counter-like sums as expected, while the unconverted gauge remains noisy and non-aggregatable.
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