1
传统自建模式：
2
┌─────────────────────────────────────┐
3
│  应用  │  数据  │  运行时  │  中间件  │
4
├─────────────────────────────────────┤
5
│        操作系统      │   虚拟化     │
6
├─────────────────────────────────────┤
7
│           服务器         │   存储     │
8
├─────────────────────────────────────┤
9
│              网络设备                │
10
└─────────────────────────────────────┘
11
     ↑ 全部自己管理和维护
12

13
云服务模式：
14
┌─────────────────────────────────────┐
15
│  应用  │  数据  │  运行时  │  中间件  │  ← SaaS
16
├─────────────────────────────────────┤
17
│        操作系统      │   虚拟化     │  ← PaaS
18
├─────────────────────────────────────┤
19
│           服务器         │   存储     │  ← IaaS
20
└─────────────────────────────────────┘
21
     ↑ 云服务商管理底层，你专注上层

1
from google.cloud import bigquery
2

3
client = bigquery.Client()
4

5
query = """
6
    SELECT
7
        user_id,
8
        COUNT(*) as order_count,
9
        SUM(amount) as total_amount
10
    FROM `project.dataset.orders`
11
    WHERE created_at >= '2024-01-01'
12
    GROUP BY user_id
13
    ORDER BY total_amount DESC
14
    LIMIT 100
15
"""
16

17
query_job = client.query(query)
18
results = query_job.result()
19

20
for row in results:
21
    print(f"{row.user_id}: {row.order_count} orders, ${row.total_amount}")

1
// 初始化 Firebase
2
import { initializeApp } from 'firebase/app';
3
import { getFirestore, collection, addDoc } from 'firebase/firestore';
4

5
const firebaseConfig = {
6
  apiKey: "your-api-key",
7
  authDomain: "your-app.firebaseapp.com",
8
  projectId: "your-project-id"
9
};
10

11
const app = initializeApp(firebaseConfig);
12
const db = getFirestore(app);
13

14
// 添加数据
15
async function addUser(name, email) {
16
  const docRef = await addDoc(collection(db, "users"), {
17
    name: name,
18
    email: email,
19
    createdAt: new Date()
20
  });
21
  console.log("Document written with ID: ", docRef.id);
22
}

1
apiVersion: apps/v1
2
kind: Deployment
3
metadata:
4
  name: my-app
5
spec:
6
  replicas: 3
7
  selector:
8
    matchLabels:
9
      app: my-app
10
  template:
11
    metadata:
12
      labels:
13
        app: my-app
14
    spec:
15
      containers:
16
      - name: my-app
17
        image: myregistry/my-app:v1.0
18
        ports:
19
        - containerPort: 8080
20
        resources:
21
          requests:
22
            memory: "256Mi"
23
            cpu: "250m"
24
          limits:
25
            memory: "512Mi"
26
            cpu: "500m"
27
---
28
apiVersion: v1
29
kind: Service
30
metadata:
31
  name: my-app-service
32
spec:
33
  selector:
34
    app: my-app
35
  ports:
36
  - port: 80
37
    targetPort: 8080
38
  type: LoadBalancer