Emit queue_info metric (backport #13583) #13640
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To allow filtering on queue type or membership status, we need an info metric for queues; see https://grafana.com/blog/2021/08/04/how-to-use-promql-joins-for-more-effective-queries-of-prometheus-metrics-at-scale/#info-metrics With this change, per-object metrics and the detailed metrics (if queue-related families are requested) will contain rabbitmq_queue_info / rabbitmq_detailed_queue_info with a value of 1 and labels including the queue name, vhost, queue type and membership status. (cherry picked from commit 2a93bbc)
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To allow filtering on queue type or membership status, we need an info metric for queues; see
https://grafana.com/blog/2021/08/04/how-to-use-promql-joins-for-more-effective-queries-of-prometheus-metrics-at-scale/#info-metrics
With this change, per-object metrics and the detailed metrics (if queue-related families are requested) will contain rabbitmq_queue_info / rabbitmq_detailed_queue_info with a value of 1 and labels including the queue name, vhost, queue type and membership status.
For example, it's now possible to get the number of messages ready by queue type:
or get a total number of messages ready excluding streams:
NOTE: for consistency with other metrics (eg
rabbitmq_global_messages_*), I use full module names as queue types (eg.rabbit_quorum_queue). Personally I'd prefer to unify this towards the short names but this would be a breaking change.This is an automatic backport of pull request #13583 done by Mergify.