Commits on Aug 30, 2024

1. Add prometheus tags for raft_cluster to non-QQ raft metrics …

   By default Ra will use the cluster name as the metrics key. Currently
   atom values are ignored by the prometheus plugin's tag rendering
   functions, so if you have a QQ and Khepri running and request the
   `/metrics/per-object` or `/metrics/detailed` endpoints you'll see values
   that don't have labels set for the `ra_metrics` metrics:
   
       # TYPE rabbitmq_raft_term_total counter
       # HELP rabbitmq_raft_term_total Current Raft term number
       rabbitmq_raft_term_total{vhost="/",queue="qq"} 9
       rabbitmq_raft_term_total 10
   
   With this change we map the name of the Ra cluster to a "raft_cluster"
   tag, so instead an example metric might be:
   
       # TYPE rabbitmq_raft_term_total counter
       # HELP rabbitmq_raft_term_total Current Raft term number
       rabbitmq_raft_term_total{vhost="/",queue="qq"} 9
       rabbitmq_raft_term_total{raft_cluster="rabbitmq_metadata"} 10
   
   This affects metrics for Khepri and the stream coordinator.

   

   the-mikedavis committed Aug 30, 2024
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