[kube-prometheus-stack] Monitoring gateway and httproute

[cello86]

Is your feature request related to a problem ?

Is it possible to coadding monitoring via alertmanager and Grafana dashboard for gateway and httproute objects, to be able to understand if they are loaded correctly and have a view of these objects?

Describe the solution you'd like.

Monitoring from kube-state-metrics.

Describe alternatives you've considered.

Add monitoring manually into alertmanager and grafana

Additional context.

No response

[cello86]

I modified the kube-state-metrics default configuration with a configmap generated from https://github.com/Kuadrant/gateway-api-state-metrics/blob/main/config/default/custom-resource-state.yaml and I generated a PR for some warning for empty metadata (Kuadrant/gateway-api-state-metrics#54).

The configuration added to helm chart was:

kube-state-metrics:
  rbac:
    create: true
    extraRules:
      - apiGroups:
          - apiextensions.k8s.io
        resources:
          - customresourcedefinitions
        verbs:
          - get
          - list
          - watch
      - apiGroups:
          - gateway.networking.k8s.io
        resources:
          - gatewayclasses
          - gateways
          - httproutes
          - referencegrants
          - tlsroutes
          - tcproutes
          - udproutes
        verbs:
          - get
          - list
          - watch
  volumes:
    - name: cr-config
      configMap:
        name: custom-resource-state-gateway
        items:
          - key: custom-resource-state.yaml
            path: config.yaml
  volumeMounts:
    - name: cr-config
      mountPath: /etc/custom-metrics/
      readOnly: true
  extraArgs:
    - --custom-resource-state-config-file=/etc/custom-metrics/config.yaml
    - --custom-resource-state-only=false

Marcello