Monitoring Queue/Exchange Rates With Prometheus

[Dave Seltzer]

Hello!

I'm currently running RabbitMQ 3.9.8 in Kubernetes (managed by the RabbitMQ Operator)

I'm using Prometheus to instrument my message queues with a ServiceMonitor:

apiVersion: monitoring.coreos.com/v1

kind: ServiceMonitor

metadata:  

  name: my-rabbit-servicemonitor

  namespace: default

spec:

  endpoints:

  - interval: 15s

    port: prometheus

    scheme: http

    scrapeTimeout: 14s

  - interval: 15s

    params:

      family:

      - queue_coarse_metrics

      - queue_consumer_count

      vhost:

      - /

    path: /metrics/detailed

    port: prometheus

    scheme: http

  selector:

    matchLabels:

      app.kubernetes.io/name: my-rabbit

The cluster only has a few hundred queues, so we're pulling queue_coarse_metrics from the detail view.

This lets me alarm based on queue-depth, which is important. But, I'd also like to be able to raise an alarm when messages stop arriving in a queue (or when they stop arriving at an exchange.)

Is there some way to expose either "Message Rate In" of an Exchange or the "Incoming" rate of a queue?

Many thanks!

-Dave

[Michal Kuratczyk]

Hi,

You can query /metrics/detailed/?family=channel_queue_exchange_metrics if that's what you are looking for.

You can also just try /metrics/per-object - with a few hundreds queues it may be sufficiently fast.

Also, some massive performance improvements are coming to /metrics/per-object endpoint - it should become

a viable option even for clusters with many more queues:

https://github.com/deadtrickster/prometheus.erl/pull/136

https://github.com/deadtrickster/prometheus.erl/pull/137

https://github.com/rabbitmq/rabbitmq-server/pull/3587

Best,

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Michał

RabbitMQ team