Convert cumulative OTel Collector metrics to delta temporality with the cumulativetodelta processor
domain: github.com · 6 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Add a `cumulativetodelta` processor to the Collector config
Use `include`/`exclude` with `metrics` (names/regex) and/or `metric_types` (sum, histogram, exponentialhistogram) to scope which series convert
Set `max_staleness` to bound how long a series' state is retained (default 1h; 0 disables staleness eviction)
Set `initial_value` (`auto`, `keep`, or `drop`) to control handling of the first data point per series
Place the processor in the metrics pipeline ahead of an exporter that requires delta temporality
Deploy and verify downstream metrics arrive as deltas
Known gotchas
The processor is stateful per Collector instance — behind a load-balanced fleet, the same series must consistently land on the same instance or conversion accuracy breaks
Non-monotonic sums are excluded from conversion by design
This processor remains beta; test staleness/initial_value settings against your gateway vs sidecar topology before relying on it in production
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