feat: Apisix Prometheus metrics - Disable unneeded labels/metrics

[luarx]

Description

1. I’d like the option to disable unused metric labels in order to reduce APISIX Prometheus metrics cardinality and prevent overflow errors, such as those mentioned in this issue

prometheus:
  metrics:
    http_status:                         
      disable_labels:                  
        - http_status
        - node

Another solution is about configure the specific metric labels to use, example:

prometheus:
  metrics:
    http_status:                         
      labels:                  
        - http_status
        - node

2. I’d like the option to disable unused metrics to reduce the amount of memory of the plugin when creating metrics that are not needed in my case

prometheus:
  metrics:
    http_status:                         
      disable: true

Thanks in advance!

[Baoyuantop]

Hi @luarx, I saw a similar one https://github.com/apache/apisix/issues/12680. Can we discuss this in one issue? I'll close it. Let's discuss it here.

[luarx]

Sure, I have updated this task with the info of the other one 👍

[manueljishi]

Hello, I'm also interested in this. As an initial POC would it be okay to disable certain labels globally? Or would we need to configure labels for each individual metric?