We can export key metrics from Horizon to Prometheus. To enable this feature, uncomment this line in the app/Providers/PrometheusServiceProvider.php file.
$this->registerHorizonCollectors();
This will register the following collectors:
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horizon_master_supervisors: exports the number of master supervisors.
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horizon_current_processes: exports the number of processes currently running per queue
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horizon_current_workload: exports the number of jobs currently waiting per queue.
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horizon_failed_jobs_per_hour jobs: exports the number of failed jobs in the past hour
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horizon_status: exports if the Horizon is running, paused, or inactive
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horizon_jobs_per_minute: exports the number of jobs processed in the last minute
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horizon_recent_jobs: exports the number of recent jobs