Add Dockerfile, Kubernetes deployment, service, and kustomization files for production setup

Author: ianlintner

Dockerfile

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+# Use official Python base image
+FROM python:3-slim
+
+# Set environment variables
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+
+# Set work directory
+WORKDIR /app
+
+# Install system dependencies
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends gcc build-essential \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Python dependencies
+COPY pyproject.toml poetry.lock* requirements.txt* ./
+RUN pip install --upgrade pip \
+    && pip install -r requirements.txt
+
+# Copy project
+COPY . .
+
+# Expose port for Flask app
+EXPOSE 5000
+
+# Default command to run Flask app
+CMD ["python", "-m", "flask_app.app"]

k8s/base/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: python-dsa
+  labels:
+    app: python-dsa
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: python-dsa
+  template:
+    metadata:
+      labels:
+        app: python-dsa
+    spec:
+      containers:
+        - name: python-dsa
+          image: us-central1-docker.pkg.dev/kame-457417/kame-house-images/python-dsa:latest
+          imagePullPolicy: Always
+          ports:
+            - containerPort: 5000
+          resources:
+            requests:
+              cpu: "100m"
+              memory: "128Mi"
+            limits:
+              cpu: "500m"
+              memory: "256Mi"

k8s/base/kustomization.yaml

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+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - deployment.yaml
+  - service.yaml

k8s/base/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: python-dsa
+  labels:
+    app: python-dsa
+spec:
+  selector:
+    app: python-dsa
+  ports:
+    - protocol: TCP
+      port: 80
+      targetPort: 5000

k8s/overlays/prod/kustomization.yaml

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+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: prod
+resources:
+  - ../../base

requirements.txt

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+flask