Microservices - Initial commit.

Author: ericgitangu

README.md

@@ -53,6 +53,9 @@ To establish a microservices-based platform that is scalable, maintainable, and
 
 **Architecture Diagram:**
 
+bash
+
+```
 +----------------------+ +-----------------------+
 | Clients | | GitHub Codespaces |
 | (Browsers, Mobile) | | Dev Container |
@@ -81,6 +84,7 @@ v
 | Service Mesh |
 | (Istio) |
 +--------------+
+```
 
 ## Key Components:
 

app/catalog/Dockerfile

@@ -0,0 +1,13 @@
+
+FROM python:3.9-slim
+
+WORKDIR /app
+
+COPY requirements.txt /app/
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . /app/
+
+EXPOSE 8000
+
+CMD ["python", "app.py"]

app/catalog/app.py

@@ -0,0 +1,10 @@
+
+from flask import Flask
+app = Flask(__name__)
+
+@app.route("/")
+def hello():
+    return "Catalog Service is Running!"
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=8000)

app/catalog/requirements.txt

@@ -0,0 +1,2 @@
+
+flask==2.2.2

app/frontend/Dockerfile

@@ -0,0 +1,10 @@
+FROM python:3.11-slim
+
+WORKDIR /app
+
+COPY requirements.txt requirements.txt
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY . .
+
+CMD ["python", "app.py"]

app/frontend/app.py

@@ -0,0 +1,10 @@
+
+from flask import Flask
+app = Flask(__name__)
+
+@app.route("/")
+def hello():
+    return "Frontend Service is Running!"
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=80)

app/frontend/k8s/deployment.yaml

@@ -0,0 +1,30 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: frontend-service
+  namespace: ecommerce
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: frontend-service
+  template:
+    metadata:
+      labels:
+        app: frontend-service
+    spec:
+      containers:
+      - name: frontend-service
+        image: egitangu/frontend-service:latest
+        ports:
+        - containerPort: 8004
+        resources:
+          limits:
+            cpu: "500m"
+            memory: "128Mi"
+          requests:
+            cpu: "200m"
+            memory: "64Mi"
+        env:
+        - name: RABBITMQ_HOST
+          value: rabbitmq

app/frontend/k8s/hpa.yaml

@@ -0,0 +1,19 @@
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: frontend-hpa
+  namespace: ecommerce
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: frontend-service
+  minReplicas: 2
+  maxReplicas: 10
+  metrics:
+  - type: Resource
+    resource:
+      name: cpu
+      target:
+        type: Utilization
+        averageUtilization: 50

app/frontend/k8s/service.yaml

@@ -0,0 +1,11 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: frontend-service
+  namespace: ecommerce
+spec:
+  ports:
+  - port: 8004
+    targetPort: 8004
+  selector:
+    app: frontend-service

app/frontend/requirements.txt

@@ -0,0 +1,6 @@
+Flask==2.2.3
+pika==1.3.0
+prometheus-client==0.16.0
+requests==2.31.0
+python-dotenv==1.0.0
+gunicorn==20.1.0