Add k3d version in progress

hello-k3d/.gitignore

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+shoppinglist-frontend.tar

hello-k3d/Dockerfile

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+FROM python:3.11-slim
+WORKDIR /app
+COPY app.py .
+RUN pip install flask redis
+CMD ["python", "app.py"]
+

hello-k3d/Makefile

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+
+
+all: cluster image load apply restart watch
+
+# TODO: maybe background this?
+cluster:
+	k3d cluster create mycluster
+	k3d cluster list
+
+image: Dockerfile
+	docker build -t shoppinglist-frontend:latest .
+
+load:
+	k3d image import shoppinglist-frontend:latest -c mycluster
+
+apply:
+	kubectl apply -f k8s/
+
+restart:
+	kubectl delete pod -l app=shoppinglist-frontend
+
+watch:
+	kubectl get pods -l app=shoppinglist-frontend -w
+
+
+
+
+

hello-k3d/app.py

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+# app.py
+from flask import Flask, request, jsonify
+import redis
+
+import random
+
+my_random_id = random.randrange(100)
+
+r = redis.Redis(host='redis', port=6379)
+app = Flask(__name__)
+
+@app.route("/id", methods=["GET"])
+def id():
+    return f"{my_random_id}\n"
+
+@app.route("/items", methods=["GET", "POST"])
+def items():
+    if request.method == "POST":
+        item = request.json.get("item")
+        if item:
+            r.rpush("shopping_list", item)
+        return '', 204
+    else:
+        items = r.lrange("shopping_list", 0, -1)
+        return jsonify([i.decode() for i in items])
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=5000)
+

hello-k3d/k8s/frontend-deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: shoppinglist-frontend
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: shoppinglist-frontend
+  template:
+    metadata:
+      labels:
+        app: shoppinglist-frontend
+    spec:
+      containers:
+        - name: frontend
+          image: shoppinglist-frontend:latest
+          imagePullPolicy: Never
+          ports:
+            - containerPort: 5000
+          env:
+            - name: REDIS_HOST
+              value: redis
+            - name: REDIS_PORT
+              value: "6379"
+

hello-k3d/k8s/frontend-ingress.yaml

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+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: shoppinglist-ingress
+  annotations:
+    nginx.ingress.kubernetes.io/rewrite-target: /
+spec:
+  ingressClassName: nginx
+  rules:
+    - host: localhost
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: shoppinglist-frontend
+                port:
+                  number: 80
+

hello-k3d/k8s/frontend-service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: shoppinglist-frontend
+spec:
+  selector:
+    app: shoppinglist-frontend
+  ports:
+    - port: 80
+      targetPort: 5000
+  type: NodePort
+

hello-k3d/k8s/redis-deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: redis
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: redis
+  template:
+    metadata:
+      labels:
+        app: redis
+    spec:
+      containers:
+        - name: redis
+          image: redis:7-alpine
+          ports:
+            - containerPort: 6379
+

hello-k3d/k8s/redis-service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: redis
+spec:
+  selector:
+    app: redis
+  ports:
+    - port: 6379
+      targetPort: 6379
+  type: ClusterIP
+