Adding custom CRD for Prometheus Adapter rules

[creativie]

Hi

It would be very convenient to use a custom CRD to fill the configuration with rules.

For example, two "PrometheusAdapterRule" CRDs

apiVersion: monitoring.coreos.com/v1alpha1
kind: PrometheusAdapterRule
metadata:
  name: example-1
spec:
  rules:
  - seriesQuery: '{__name__=~"^container_.*",container!="POD",namespace!="",pod!=""}'
    resources:
      overrides:
        namespace: {resource: "namespace"}
        pod: {resource: "pod"}
    name:
      matches: "^container_(.*)_seconds_total$"
    metricsQuery: "sum(rate(<<.Series>>{<<.LabelMatchers>>,container!="POD"}[2m])) by (<<.GroupBy>>)"

and

apiVersion: monitoring.coreos.com/v1alpha1
kind: PrometheusAdapterRule
metadata:
  name: example-2
spec:
  rules:
  - seriesQuery: 'cheddar{sharp="true"}'
    name: {as: "cheesy_goodness"}
    resources:
      overrides:
        brand: {group: "cheese.io", resource: "brand"}
    metricsQuery: 'count(cheddar{sharp="true"})'

generates configuration file for Prometheus Adapter like this

rules:
  # example-1
  - seriesQuery: '{__name__=~"^container_.*",container!="POD",namespace!="",pod!=""}'
    resources:
      overrides:
        namespace: {resource: "namespace"}
        pod: {resource: "pod"}
    name:
      matches: "^container_(.*)_seconds_total$"
    metricsQuery: "sum(rate(<<.Series>>{<<.LabelMatchers>>,container!="POD"}[2m])) by (<<.GroupBy>>)"
  # example-2
  - seriesQuery: 'cheddar{sharp="true"}'
    name: {as: "cheesy_goodness"}
    resources:
      overrides:
        brand: {group: "cheese.io", resource: "brand"}
    metricsQuery: 'count(cheddar{sharp="true"})'

[dgrisonnet]

/assign /triage accepted

[logicalhan]

/triage accepted