Added monitoring into the architecture

Author: Lavanya-GOW

monitoring/deployment.yaml

@@ -0,0 +1,37 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: prometheus
+  namespace: monitoring
+
+spec:
+  replicas: 1
+
+  selector:
+    matchLabels:
+      app: prometheus
+
+  template:
+    metadata:
+      labels:
+        app: prometheus
+
+    spec:
+      containers:
+
+      - name: prometheus
+        image: prom/prometheus:latest
+        args:
+          - "--config.file=/etc/prometheus/prometheus.yml"
+
+        ports:
+        - containerPort: 9090
+
+        volumeMounts:
+        - name: prometheus-config
+          mountPath: /etc/prometheus
+
+      volumes:
+      - name: prometheus-config
+        configMap:
+          name: prometheus-config

monitoring/namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: monitoring

monitoring/prometheus.yaml

@@ -0,0 +1,28 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: prometheus-config
+  namespace: monitoring
+
+data:
+  prometheus.yml: |
+    global:
+      scrape_interval: 15s
+      evaluation_interval: 15s
+
+    scrape_configs:
+
+      - job_name: "prometheus"
+        static_configs:
+          - targets:
+              - localhost:9090
+
+      - job_name: "frontend"
+        static_configs:
+          - targets:
+              - frontend-service.three-tier-app.svc.cluster.local:80
+
+      - job_name: "backend"
+        static_configs:
+          - targets:
+              - backend-service.three-tier-app.svc.cluster.local:8080

monitoring/service.yaml

@@ -0,0 +1,17 @@
+apiVersion: v1
+kind: Service
+
+metadata:
+  name: prometheus
+  namespace: monitoring
+
+spec:
+
+  selector:
+    app: prometheus
+
+  ports:
+  - port: 9090
+    targetPort: 9090
+
+  type: ClusterIP