jsonnet: Drop deprecated coredns_cache_misses_total

Deprecated via https://github.com/coredns/coredns/pull/4781

README.md

@@ -92,7 +92,7 @@ $ minikube addons disable metrics-server
 The following versions are supported and work as we test against these versions in their respective branches. But note that other versions might work!
 
 | kube-prometheus stack                                                                    | Kubernetes 1.18 | Kubernetes 1.19 | Kubernetes 1.20 | Kubernetes 1.21 | Kubernetes 1.22 | Kubernetes 1.23 |
-|--------------------------------------------------------------------------------------------|-----------------|-----------------|-----------------|-----------------|-----------------|-----------------|
+|------------------------------------------------------------------------------------------|-----------------|-----------------|-----------------|-----------------|-----------------|-----------------|
 | [`release-0.6`](https://github.com/prometheus-operator/kube-prometheus/tree/release-0.6) | ✗               | ✔               | ✗               | ✗               | ✗               | ✗               |
 | [`release-0.7`](https://github.com/prometheus-operator/kube-prometheus/tree/release-0.7) | ✗               | ✔               | ✔               | ✗               | ✗               | ✗               |
 | [`release-0.8`](https://github.com/prometheus-operator/kube-prometheus/tree/release-0.8) | ✗               | ✗               | ✔               | ✔               | ✗               | ✗               |

jsonnet/kube-prometheus/components/k8s-control-plane.libsonnet

@@ -310,11 +310,22 @@ function(params) {
       namespaceSelector: {
         matchNames: ['kube-system'],
       },
-      endpoints: [{
+      endpoints: [
+        {
           port: 'metrics',
           interval: '15s',
           bearerTokenFile: '/var/run/secrets/kubernetes.io/serviceaccount/token',
-      }],
+          metricRelabelings: [
+            // Drop deprecated metrics
+            // TODO (pgough) - consolidate how we drop metrics across the project
+            {
+              sourceLabels: ['__name__'],
+              regex: 'coredns_cache_misses_total',
+              action: 'drop',
+            },
+          ],
+        },
+      ],
     },
   },
 

manifests/kubernetesControlPlane-serviceMonitorCoreDNS.yaml

@@ -10,6 +10,11 @@ spec:
   endpoints:
   - bearerTokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token
     interval: 15s
+    metricRelabelings:
+    - action: drop
+      regex: coredns_cache_misses_total
+      sourceLabels:
+      - __name__
     port: metrics
   jobLabel: app.kubernetes.io/name
   namespaceSelector: