feat: add lvm operator monitoring config files

Signed-off-by: Arun Kumar Mohan <[email protected]>

Dockerfile.combined

@@ -19,12 +19,15 @@ COPY pkg/ pkg/
 # Build
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -o manager main.go
 RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -o vgmanager cmd/vgmanager/main.go
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -o metricsexporter cmd/metricsexporter/exporter.go
 
 # vgmanager needs 'nsenter' and other basic linux utils to correctly function
 FROM centos:8
 WORKDIR /
 COPY --from=builder /workspace/manager .
 COPY --from=builder /workspace/vgmanager .
+COPY --from=builder /workspace/metricsexporter .
+EXPOSE 23532
 USER 65532:65532
 
 # '/manager' is lvm-operator entrypoint

config/manager/manager.yaml

@@ -21,6 +21,7 @@ spec:
     metadata:
       labels:
         control-plane: controller-manager
+        exporter: lvm-operator
     spec:
       securityContext:
         runAsNonRoot: true
@@ -66,5 +67,9 @@ spec:
         envFrom:
         - configMapRef:
             name: lvm-operator-manager-config
+      - command:
+        - /metricsexporter
+        image: controller:latest
+        name: metricsexporter
       serviceAccountName: controller-manager
       terminationGracePeriodSeconds: 10

config/prometheus/monitor.yaml

@@ -15,7 +15,12 @@ spec:
       bearerTokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token
       tlsConfig:
         insecureSkipVerify: true
+    - path: /metrics
+      port: lvm-metrics
+      scheme: http
+      bearerTokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token
+      tlsConfig:
+        insecureSkipVerify: true
   selector:
     matchLabels:
       app.kubernetes.io/compose: metrics
-      control-plane: controller-manager

config/rbac/kustomization.yaml

@@ -13,6 +13,9 @@ resources:
 - topolvm_controller_service_account.yaml
 - topolvm_controller_role.yaml
 - topolvm_controller_role_bindings.yaml
+# lvm-node metric rbac
+- lvm_metric_service_config.yaml
+- lvm_node_role_n_rolebindings.yaml
 # topolvm-node metric rbac
 - topolvm_metric_service_config.yaml
 - topolvm_node_role_n_rolebindings.yaml

config/rbac/lvm_metric_service_config.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: lvm-node-metrics
+  namespace: system
+  labels:
+    app.kubernetes.io/compose: metrics
+spec:
+  selector:
+    exporter: lvm-operator
+  ports:
+    - name: lvm-metrics
+      protocol: TCP
+      port: 23532
+      targetPort: 23532

config/rbac/lvm_node_role_n_rolebindings.yaml

@@ -0,0 +1,31 @@
+---
+kind: Role
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: lvm-metrics
+  namespace: system
+rules:
+ - apiGroups:
+   - ""
+   resources:
+    - services
+    - endpoints
+    - pods
+   verbs:
+    - get
+    - list
+    - watch
+---
+kind: RoleBinding
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: lvm-metrics
+  namespace: system
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: lvm-metrics
+subjects:
+- kind: ServiceAccount
+  name: prometheus-k8s
+  namespace: openshift-monitoring