Bull Prom


Provides Prometheus metrics for Bull

Metrics

| Metric | type | description |
|-------------------------------------|---------|---------------------------------------------------------|
| jobs_completed_total | counter | Total number of completed jobs |
| jobs_active_total | counter | Total number of active jobs (currently being processed) |
| jobs_delayed_total | counter | Total number of jobs that will run in the future |
| jobs_failed_total | counter | Total number of failed jobs |
| jobs_waiting_total | counter | Total number of jobs waiting to be processed |
| jobs_duration_milliseconds | summary | Processing time for completed/failed |
| jobs_waiting_duration_milliseconds | summary | Waiting time for completed/failed |
| jobs_attempts | summary | Processing time for completed/failed/jobs |

_IMPORTANT_: If you are using this library to track job duration metrics for a queue for multiple consumers you will need to listen to the global:completed event. Otherwise this library will not record job duration metrics. To listen to this event instead of the completed event you'll need to set the init paremeter useGlobal to true.

Usage

``typescript
import Queue from 'bull';
import promClient from 'prom-client';
import * as bullProm from 'bull-prom';

const queue = new Queue('myQueue'...);

const bullMetric = bullProm.init({
promClient, // optional, it will use internal prom client if it is not given
interval: 1000, // optional, in ms, default to 60000
useGlobal: false, // optional, default to false
});

const started = bullMetric.start(queue);

// Optional
started.stop();

// Metrics result in Prometheus
// jobs_waiting_total{queue_name="myQueue", queue_prefix="default"} 0
// jobs_active_total{queue_name="myQueue", queue_prefix="default"} 0
// jobs_complete_total{queue_name="myQueue", queue_prefix="default"} 0
// jobs_failed_total{queue_name="myQueue", queue_prefix="default"} 0
// jobs_delayed_total{queue_name="myQueue", queue_prefix="default"} 0
`

API

$3

Initialize

options:
- promClient (optional): prom client instance
- interval (optional, default 60000): interval in ms to fetch the Bull statistic
- useGlobal (optional, default false)

$3

Start running and fetching the data from Bull based on interval with the given Bull queue.

Returns a queue metrics object which includes the following methods:
- stop(): stops monitoring the queue metrics
- remove()`: removes metrics from prometheus

Contributors

* @mjgp2
* @robbiet480
* @TotallyNotElite
* @ejhayes

License

MIT © Pawel Badenski

This library is largely derived from kue-prom (MIT © Budi Irawan)