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Merge remote-tracking branch 'origin/topic/awelzel/3947-telemetry-hook-scrape'

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* origin/topic/awelzel/3947-telemetry-hook-scrape:
  btest/telemetry: Fix "Note compilable" typo
  misc/stats: Add zeek_net_timestamp_seconds
  telemetry/Manager: Remove variant include
  telemetry: Invoke Telemetry::sync() only at scrape/collection time
This commit is contained in:
Arne Welzel 2024-10-22 19:04:22 +02:00
commit daa358c840
27 changed files with 386 additions and 38 deletions
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15
scripts/base/init-bare.zeek
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@ -5933,6 +5933,21 @@ export {
sum: double;
};
## Telemetry sync hook.
##
## This hook is invoked when metrics are requested via functions
## :zeek:see:`Telemetry::collect_metrics` and :zeek:see:`Telemetry::collect_histogram_metrics`,
## or just before Zeek collects metrics when being scraped through
## its Prometheus endpoint.
## Script writers can use it to synchronize (or mirror) metrics with the
## telemetry subsystem. For example, when tracking table or value
## footprints with gauges, the value in question can be set on an actual
## :zeek:see:`Telemetry::Gauge` instance during execution of this hook.
##
## Implementations should be lightweight, this hook may be called
## multiple times per minute.
global sync: hook();
type MetricVector : vector of Metric;
type HistogramMetricVector : vector of HistogramMetric;