Make a test to show how to use the clusterMetrics feature support the CoreDNS service integration

.github/workflows/integration-test.yml

@@ -27,8 +27,9 @@
 
       - name: List tests
         id: list_tests
+        working-directory: charts/k8s-monitoring/tests/integration
         run: |
-          tests=$(ls charts/k8s-monitoring/tests/integration)
+          tests=$(find . -name values.yaml -exec dirname {} \;)
           echo "Tests: ${tests}"
           echo "tests=$(echo "${tests}" | jq --raw-input --slurp --compact-output 'split("\n") | map(select(. != ""))')" >> "${GITHUB_OUTPUT}"
 
@@ -57,7 +58,7 @@
 
       - name: Read special test dependencies
         id: read_deps
         run: |
           if [ -f "charts/k8s-monitoring/tests/integration/${{ matrix.test }}/deps.json" ]; then
             # e.g. ["terraform", "vendir"]
             echo "deps=$(jq --compact-output '.' charts/k8s-monitoring/tests/integration/${{ matrix.test }}/deps.json)" >> $GITHUB_ENV

charts/k8s-monitoring/tests/integration/service-integrations/coredns/deployments/grafana.yaml

@@ -0,0 +1,43 @@
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: grafana
+---
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: HelmRepository
+metadata:
+  name: grafana
+  namespace: grafana
+spec:
+  interval: 1m
+  url: https://grafana.github.io/helm-charts
+---
+apiVersion: helm.toolkit.fluxcd.io/v2
+kind: HelmRelease
+metadata:
+  name: grafana
+  namespace: grafana
+spec:
+  interval: 1m
+  chart:
+    spec:
+      chart: grafana
+      sourceRef:
+        kind: HelmRepository
+        name: grafana
+        namespace: grafana
+      interval: 1m
+  values:
+    grafana.ini:
+      auth.anonymous:
+        enabled: true
+        org_role: Admin
+    datasources:
+      datasources.yaml:
+        apiVersion: 1
+        datasources:
+          - name: Prometheus
+            type: prometheus
+            url: http://prometheus-server.prometheus.svc:9090
+            isDefault: true

charts/k8s-monitoring/tests/integration/service-integrations/coredns/deployments/query-test.yaml

@@ -0,0 +1,47 @@
+---
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: GitRepository
+metadata:
+  name: k8s-monitoring-test
+spec:
+  interval: 1m
+  url: https://github.com/grafana/k8s-monitoring-helm
+  ref:
+    branch: main
+  ignore: |
+    /*
+    !/charts/k8s-monitoring-test
+---
+apiVersion: helm.toolkit.fluxcd.io/v2
+kind: HelmRelease
+metadata:
+  name: k8s-monitoring-test
+spec:
+  interval: 1m
+  chart:
+    spec:
+      chart: charts/k8s-monitoring-test
+      sourceRef:
+        kind: GitRepository
+        name: k8s-monitoring-test
+      interval: 1m
+  dependsOn:
+    - name: prometheus
+      namespace: prometheus
+  values:
+    tests:
+      - env:
+          CLUSTER: coredns-integration-test
+          PROMETHEUS_URL: http://prometheus-server.prometheus.svc:9090/api/v1/query
+
+        queries:
+          # CoreDNS metrics
+          - query: coredns_build_info{cluster="$CLUSTER", job="integrations/coredns"}
+            type: promql
+
+          # DPM check
+          - query: avg(count_over_time(scrape_samples_scraped{cluster="$CLUSTER"}[1m]))
+            type: promql
+            expect:
+              value: 1
+              operator: ==

charts/k8s-monitoring/tests/integration/service-integrations/coredns/values.yaml

@@ -0,0 +1,17 @@
+---
+cluster:
+  name: coredns-integration-test
+
+destinations:
+  - name: localPrometheus
+    type: prometheus
+    url: http://prometheus-server.prometheus.svc:9090/api/v1/write
+
+clusterMetrics:
+  enabled: true
+  kubeDNS:
+    enabled: true
+    jobLabel: integrations/coredns
+
+alloy-metrics:
+  enabled: true

charts/k8s-monitoring/tests/integration/service-integrations/mysql/deployments/prometheus.yaml

@@ -0,0 +1,61 @@
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: prometheus
+---
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: HelmRepository
+metadata:
+  name: prometheus-community
+  namespace: prometheus
+spec:
+  interval: 1m
+  url: https://prometheus-community.github.io/helm-charts
+---
+apiVersion: helm.toolkit.fluxcd.io/v2
+kind: HelmRelease
+metadata:
+  name: prometheus
+  namespace: prometheus
+spec:
+  interval: 1m
+  chart:
+    spec:
+      chart: prometheus
+      version: "^25"
+      sourceRef:
+        kind: HelmRepository
+        name: prometheus-community
+        namespace: prometheus
+      interval: 1m
+  values:
+    server:
+      extraFlags:
+        - enable-feature=remote-write-receiver
+
+      persistentVolume:
+        enabled: false
+
+      service:
+        servicePort: 9090
+
+    serverFiles:
+      prometheus.yml:
+        scrape_configs: []
+
+    configmapReload:
+      prometheus:
+        enabled: false
+
+    alertmanager:
+      enabled: false
+
+    kube-state-metrics:
+      enabled: false
+
+    prometheus-node-exporter:
+      enabled: false
+
+    prometheus-pushgateway:
+      enabled: false