hydra-notify: support sending diagnostic dumps to STDERR on request
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@ -21,3 +21,13 @@ for details on enabling and configuring the exporter.
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The notification exporter exposes metrics on a per-plugin, per-event-type basis: execution
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durations, frequency, successes, and failures.
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### Diagnostic Dump
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The notification daemon can also dump its metrics to stderr whether or not the exporter
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is configured. This is particularly useful for cases where metrics data is needed but the
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exporter was not enabled.
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To trigger this diagnostic dump, send a Postgres notification with the
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`hydra_notify_dump_metrics` channel and no payload. See
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[Re-sending a notification](../notifications.md#re-sending-a-notification).
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@ -99,6 +99,7 @@ my $listener = Hydra::PostgresListener->new($dbh);
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$listener->subscribe("build_started");
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$listener->subscribe("build_finished");
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$listener->subscribe("step_finished");
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$listener->subscribe("hydra_notify_dump_metrics");
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sub runPluginsForEvent {
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my ($event) = @_;
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@ -145,6 +146,11 @@ while (!$queued_only) {
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$prom->inc("notify_event", { channel => $channelName });
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if ($channelName eq "hydra_notify_dump_metrics") {
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print STDERR "Dumping prometheus metrics:\n${\$prom->format}\n";
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next;
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}
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eval {
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my $event = Hydra::Event->new_event($channelName, $message->{"payload"});
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runPluginsForEvent($event);
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