Instantiate default metric instances during RegisterKnownFamilies() in PrometheusExporter. - #771
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Instantiate default metric instances during RegisterKnownFamilies() in PrometheusExporter.#771copybara-service[bot] wants to merge 1 commit into
RegisterKnownFamilies() in PrometheusExporter.#771copybara-service[bot] wants to merge 1 commit into
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… in `PrometheusExporter`. In `prometheus-cpp`, metric families without at least one metric instance are omitted by `registry_->Collect()`. Initializing default instances upon family registration ensures that Prometheus text snapshots (`GetTextSnapshot()`) include `# HELP` and `# TYPE` metadata blocks immediately after telemetry backend configuration, before any observations occur. PiperOrigin-RevId: 970003996
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Instantiate default metric instances during
RegisterKnownFamilies()inPrometheusExporter.In
prometheus-cpp, metric families without at least one metric instance are omitted byregistry_->Collect(). Initializing default instances upon family registration ensures that Prometheus text snapshots (GetTextSnapshot()) include# HELPand# TYPEmetadata blocks immediately after telemetry backend configuration, before any observations occur.