雲端基礎概念（IaaS / PaaS / SaaS）

// Azure SDK — 用程式碼管理雲端資源
using Azure.Identity;
using Azure.ResourceManager;
 
// 認證 — 用 DefaultAzureCredential（支援本機開發和雲端環境）
var credential = new DefaultAzureCredential();
var armClient = new ArmClient(credential);
 
// 列出所有 Resource Group
var subscription = await armClient.GetDefaultSubscriptionAsync();
await foreach (var rg in subscription.GetResourceGroups())
{
    Console.WriteLine($"Resource Group: {rg.Data.Name}, Location: {rg.Data.Location}");
}
 
// 環境設定 — 不同環境用不同的雲端服務
// appsettings.Development.json → 本機 Docker
// appsettings.Staging.json → Azure App Service (PaaS)
// appsettings.Production.json → Azure App Service + Redis + SQL
builder.Configuration
    .AddJsonFile("appsettings.json")
    .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
    .AddAzureKeyVault(new Uri(vaultUri), credential); // 從 Key Vault 取密鑰

// AWS SDK v3 — 管理雲端資源
import { EC2Client, DescribeInstancesCommand } from "@aws-sdk/client-ec2";
import { S3Client, PutObjectCommand } from "@aws-sdk/client-s3";
 
// 列出 EC2 Instance（IaaS）
const ec2 = new EC2Client({ region: "us-east-1" });
const instances = await ec2.send(new DescribeInstancesCommand({}));
instances.Reservations?.forEach((r) =>
  r.Instances?.forEach((i) =>
    console.log(`Instance: ${i.InstanceId}, State: ${i.State?.Name}`)
  )
);
 
// 上傳檔案到 S3（Storage）
const s3 = new S3Client({ region: "us-east-1" });
await s3.send(
  new PutObjectCommand({
    Bucket: "my-app-bucket",
    Key: "uploads/photo.jpg",
    Body: fileBuffer,
    ContentType: "image/jpeg",
  })
);

# Azure SDK — Python
from azure.identity import DefaultAzureCredential
from azure.mgmt.resource import ResourceManagementClient
 
credential = DefaultAzureCredential()
subscription_id = "your-subscription-id"
 
# 列出 Resource Group
resource_client = ResourceManagementClient(credential, subscription_id)
for rg in resource_client.resource_groups.list():
    print(f"Resource Group: {rg.name}, Location: {rg.location}")
 
# Boto3 — AWS Python SDK
import boto3
 
# 列出 S3 Bucket
s3 = boto3.client("s3")
response = s3.list_buckets()
for bucket in response["Buckets"]:
    print(f"Bucket: {bucket['Name']}")