feat: add DNS ServiceConfiguration for metering

config/components/service-catalog/README.md

@@ -15,7 +15,7 @@ API-surface repo.
 | Kind                   | Name                          | What it declares                                                            |
 | ---------------------- | ----------------------------- | --------------------------------------------------------------------------- |
 | `Service`              | `dns-networking-miloapis-com` | `serviceName`, display metadata, producer owner.                            |
-| `ServiceConfiguration` | `dns-networking-miloapis-com` | DNS MonitoredResourceTypes, metrics, and billing routing. _(Phase 2 — TBD)_ |
+| `ServiceConfiguration` | `dns-networking-miloapis-com` | DNS MonitoredResourceTypes, metrics, and billing routing.                   |
 
 Ships in `phase: Published`.
 
@@ -40,10 +40,11 @@ objects stamped `app.kubernetes.io/managed-by: services-operator`.
 Producers must not author those downstream CRDs directly — edit the
 `ServiceConfiguration` and let the fan-out catch up.
 
-The DNS `ServiceConfiguration` is tracked as Phase 2 of the catalog
-registration (metering): query volume, hosted zones, and record-set
-inventory. See the
-[catalog registration issue](https://github.com/datum-cloud/dns-operator/issues/44).
+The DNS `ServiceConfiguration` meters three signals: authoritative
+query volume (`zone/queries`), hosted-zone footprint (`zone/hosted`),
+and record-set inventory (`recordset/active`). Declaring `zone/queries`
+is the metering contract; emitting those query events from the PowerDNS
+data plane is the remaining usage-pipeline work.
 
 ## Immutability after `Published`
 

config/components/service-catalog/kustomization.yaml

@@ -10,10 +10,9 @@ kind: Kustomization
 #
 #   1. The `Service` itself (`dns-networking-miloapis-com`), which carries
 #      identity (`serviceName`), display metadata, and producer owner.
-#      (Phase 1 — service registration.)
 #   2. A single `ServiceConfiguration` (same name, different Kind) that
-#      will declare the DNS MonitoredResourceTypes, metrics, and billing
-#      routing. (Phase 2 — metering; not yet authored.)
+#      declares the DNS MonitoredResourceTypes, metrics, and billing
+#      routing.
 #
 # Per billing's `emitting-usage.md`, the `ServiceConfiguration` is the
 # *only* document a producer authors for billing: the services-operator
@@ -27,4 +26,4 @@ kind: Kustomization
 # repo, the same way other services publish their catalog entries.
 resources:
   - services_v1alpha1_service_dns.yaml
-  # - services_v1alpha1_serviceconfiguration_dns.yaml  # added in Phase 2
+  - services_v1alpha1_serviceconfiguration_dns.yaml

config/components/service-catalog/services_v1alpha1_serviceconfiguration_dns.yaml

@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: AGPL-3.0-only
+
+# DNS metering. The services-operator fans this out into billing
+# MeterDefinition/MonitoredResourceType objects; don't author those directly.
+apiVersion: services.miloapis.com/v1alpha1
+kind: ServiceConfiguration
+metadata:
+  labels:
+    app.kubernetes.io/name: dns-operator
+    app.kubernetes.io/managed-by: kustomize
+  name: dns-networking-miloapis-com
+spec:
+  serviceRef:
+    name: dns-networking-miloapis-com
+  phase: Published
+  version: v1
+  monitoredResourceTypes:
+    - type: dns.networking.miloapis.com/DNSZone
+      displayName: DNS Zone
+      description: |
+        An authoritative DNS zone, billed on per-zone footprint (zones),
+        authoritative query volume (zone/queries), and total record inventory
+        (records/active via Status.RecordCount).
+      gvk:
+        group: dns.networking.miloapis.com
+        kind: DNSZone
+      labels:
+        - name: location
+          description: Datum point-of-presence / region serving the zone or query.
+        - name: rcode
+          description: DNS response code for answered queries (NOERROR, NXDOMAIN, SERVFAIL).
+        - name: record_type
+          description: Queried record type (A, AAAA, CNAME, TXT, MX, ...).
+  metrics:
+    - name: dns.networking.miloapis.com/zone/queries
+      displayName: DNS Queries
+      description: Authoritative queries answered for a zone (primary consumption signal).
+      kind: Delta
+      unit: "{query}"
+      dimensions:
+        - rcode
+        - record_type
+        - location
+    - name: dns.networking.miloapis.com/zones
+      displayName: Hosted DNS Zones
+      description: Active hosted-zone footprint (gauge, 1 per active DNSZone).
+      kind: Gauge
+      unit: "{zone}"
+      dimensions:
+        - location
+    - name: dns.networking.miloapis.com/records/active
+      displayName: Active DNS Records
+      description: Individual DNS records under management (gauge, counted across all record sets).
+      kind: Gauge
+      unit: "{record}"
+      dimensions:
+        - record_type
+        - location
+  billing:
+    consumerDestinations:
+      - monitoredResourceType: dns.networking.miloapis.com/DNSZone
+        metrics:
+          - dns.networking.miloapis.com/zone/queries
+          - dns.networking.miloapis.com/zones
+          - dns.networking.miloapis.com/records/active