Fake metrics endpoint to make ODF happy

While the "monitoring-endpoint" configuration in OCS 4.8 was optional,
it appears to be required in 4.10, and ODF refuses to deploy if it
can't reach the endpoint.

This commit provides a fake metrics endpoint to make the ODF operator
happy.

fake-metrics-server/base/deploy.yaml

@@ -0,0 +1,13 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: fake-metrics-exporter
+spec:
+  template:
+    spec:
+      containers:
+        - name: fake-metrics-exporter
+          image: quay.io/larsks/fake-metrics-exporter:v0.1.0
+          ports:
+            - name: metrics
+              containerPort: 9283

fake-metrics-server/base/kustomization.yaml

@@ -0,0 +1,8 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: openshift-storage
+commonLabels:
+  app: fake-metrics-server
+resources:
+- deploy.yaml
+- service.yaml

fake-metrics-server/base/service.yaml

@@ -0,0 +1,8 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: fake-metrics-exporter
+spec:
+  ports:
+  - port: 9283
+    targetPort: metrics

fake-metrics-server/overlays/nerc-ocp-infra/deploy_patch.yaml

@@ -0,0 +1,17 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: fake-metrics-exporter
+spec:
+  template:
+    spec:
+      volumes:
+        - name: fake-metrics
+          configMap:
+            name: fake-metrics
+      containers:
+        - name: fake-metrics-exporter
+          volumeMounts:
+            - name: fake-metrics
+              mountPath: /metrics.json
+              subPath: metrics.json

fake-metrics-server/overlays/nerc-ocp-infra/kustomization.yaml

@@ -0,0 +1,13 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: openshift-storage
+resources:
+- ../../base/
+
+patches:
+  - path: deploy_patch.yaml
+
+configMapGenerator:
+  - name: fake-metrics
+    files:
+      - metrics.json

fake-metrics-server/overlays/nerc-ocp-infra/metrics.json

@@ -0,0 +1,16 @@
+{
+  "ceph_health_status": 0.0,
+  "ceph_osd_flag_noup": 0.0,
+  "ceph_osd_flag_nodown": 0.0,
+  "ceph_osd_flag_noout": 0.0,
+  "ceph_osd_flag_noin": 0.0,
+  "ceph_osd_flag_nobackfill": 0.0,
+  "ceph_osd_flag_norebalance": 0.0,
+  "ceph_osd_flag_norecover": 0.0,
+  "ceph_osd_flag_noscrub": 0.0,
+  "ceph_osd_flag_nodeep_scrub": 0.0,
+  "ceph_num_objects_degraded": 0.0,
+  "ceph_num_objects_misplaced": 0.0,
+  "ceph_num_objects_unfound": 0.0,
+  "ceph_healthcheck_slow_ops": 0.0
+}