Add documentation to install prometheus and grafana

deploy/monitoring/prometheus.yaml

@@ -0,0 +1,89 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: prometheus-server
+  namespace: ingress-nginx
+rules:
+- apiGroups: [""]
+  resources: 
+  - services
+  - endpoints
+  - pods
+  verbs: ["get", "list", "watch"]
+
+---
+
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: prometheus-server
+  namespace: ingress-nginx
+
+---
+
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: prometheus-server
+  namespace: ingress-nginx
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: prometheus-server
+subjects:
+- kind: ServiceAccount
+  name: prometheus-server
+  namespace: ingress-nginx
+
+---
+
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: prometheus-server
+  namespace: ingress-nginx
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: prometheus-server
+  template:
+    metadata:
+      labels:
+        app: prometheus-server
+    spec:
+      serviceAccountName: prometheus-server
+      containers:
+        - name: prometheus
+          image: prom/prometheus:v2.3.2
+          args:
+            - "--config.file=/etc/prometheus/prometheus.yml"
+            - "--storage.tsdb.path=/prometheus/"
+          ports:
+            - containerPort: 9090
+          volumeMounts:
+            - name: prometheus-config-volume
+              mountPath: /etc/prometheus/
+            - name: prometheus-storage-volume
+              mountPath: /prometheus/
+      volumes:
+        - name: prometheus-config-volume
+          configMap:
+            name: prometheus-configuration
+        - name: prometheus-storage-volume
+          emptyDir: {}
+
+---
+
+apiVersion: v1
+kind: Service
+metadata:
+  name: prometheus-service
+  namespace: ingress-nginx
+spec:
+  selector:
+    app: prometheus-server
+  type: NodePort
+  ports:
+    - port: 9090
+      targetPort: 9090