Category
AWS Lambda 本番運用ガイド（実行モデル／冪等性／失敗設計／可観測性／セキュリティ／コールドスタート最適化）
Lambdaは『イベント→使い捨ての実行環境→使った分だけ課金』というモデルの上で、at-least-once・コールドスタート・最小権限・課金の式という制約を前提に作る基盤です。本クラスタは、Lambdaを採用した後の『どう本番で作るか』を体系化します——Init/Invoke/Shutdownのライフサイクルとハンドラ外での接続再利用、SnapStart（Java/Python/.NET）とプロビジョンド同時実行＋Application Auto Scalingによるコールドスタート最適化、API Gateway（REST/HTTP API）・Function URLs・ALBから選ぶHTTPの入口とペイロード形式2.0・JWT/IAM認証・リクエスト検証・CORS・エラー設計、不変バージョンとエイリアス・加重ルーティングによるカナリアリリースとCodeDeployの自動ロールバック・SAM/CDK/TerraformとOIDC鍵レスCI/CD、RDS Proxy/Data APIによる接続枯渇対策とVPC/NATコスト最適化、Powertoolsによる冪等化とコード変更ゼロのJSON構造化ログ・X-Ray・EMFメトリクス、実行ロールの最小権限とSecrets Manager、そして『クラウドでのテストを優先』する単体/結合/E2Eのテスト戦略まで——可観測性・回復性・冪等性・セキュリティ・コスト効率・テスト容易性を軸に解説します。本番二重課金0件のサーバーレス決済プラットフォームと、API Gateway上に221本のAPIを運用する経済産業大臣賞受賞のB2B SaaSの知見を根拠に、2025年8月のINIT課金統一など最新仕様まで含めて、AWS公式ドキュメントに忠実な実コードで解説します。LambdaかFargateかの技術選定そのものは『ECS on Fargate 本番運用』クラスタの『Fargate vs Lambda vs App Runner』を参照してください。
6 articles in total
Foundational guide
Foundational guide (start here)
AWS Lambda production-operation guide: firm up the execution model, idempotency, observability, security, and cost with the official spec
An implementation guide for designing and operating AWS Lambda at production quality. Faithful to the AWS official spec, in real code it explains the three-phase execution-environment lifecycle, connection reuse outside the handler, ZIP/container/layer packaging, failure design for sync/async/event sources, idempotency with Powertools, structured logs/X-Ray, least privilege and Secrets, and cost optimization with Arm64 and memory tuning.
Related practical articles
- AWSLambdaRDSAuroraサーバーレス
Connecting from Lambda to RDS/Aurora: RDS Proxy, Data API, VPC design to prevent connection exhaustion, and cost optimization
An implementation guide for connecting from AWS Lambda to RDS/Aurora (PostgreSQL/MySQL) at production quality. It explains, in real code faithful to the AWS official spec: the root problem of connection exhaustion from concurrency fan-out, RDS Proxy's connection pool and avoiding pinning, the connection-free RDS Data API, IAM database authentication, VPC/NAT cost and PrivateLink, and Aurora Serverless v2's scale-to-zero.
12 min read - AWSLambdaテストサーバーレステスト容易性
Lambda testing strategy: designing unit/integration/E2E, SDK mocking, sam local, and verifying in the cloud
An implementation guide to testing AWS Lambda at production quality. With real code faithful to the AWS official spec, it explains: the unit/integration/E2E AWS officially defines and the guidance to 'prioritize testing in the cloud,' unit tests of thin handlers and pure logic, SDK mocking with aws-sdk-client-mock/moto, where sam local is useful and its limits, and integration/async side-effect verification with disposable stacks.
11 min read - AWSLambdaAPI Gatewayサーバーレスアーキテクチャ設計
Building a production HTTP API with Lambda: choosing among API Gateway (REST/HTTP API), Function URLs, and ALB, plus auth, validation, and error design
An implementation guide to building an HTTP/REST API with AWS Lambda at production quality. It selects among the four entrances — API Gateway REST API, HTTP API, Lambda Function URLs, and ALB — by feature/price/latency, and explains, with real code faithful to the AWS official specs, payload-format-2.0 response inference, JWT/Lambda/IAM authorizers, request validation, CORS, error mapping, and throttling.
14 min read - AWSLambdaCI/CDサーバーレスIaC
Safe Lambda deployment: versions, aliases, canary releases (CodeDeploy), and SAM/CDK/Terraform selection
An implementation guide to safely deploying AWS Lambda with zero downtime. With real code faithful to the AWS official specs, it covers immutable versions and aliases, weighted aliases and CodeDeploy canary/linear delivery, pre/post-traffic hooks and automatic rollback via CloudWatch alarms, waiting on the function state, selecting SAM/CDK/Terraform/Serverless Framework, and keyless CI/CD via GitHub Actions OIDC.
11 min read - AWSLambdaサーバーレスパフォーマンスコスト最適化
Crushing Lambda cold starts in production: choosing among execution-environment reuse, SnapStart, and provisioned concurrency
An implementation guide to suppressing AWS Lambda cold starts at production quality. With real code faithful to the AWS official specs and a decision tree, it covers the true nature of the INIT phase and the August 2025 billing unification, connection reuse and package reduction and Arm64, SnapStart's (Java/Python/.NET) snapshot restore and the uniqueness pitfall, provisioned concurrency + Application Auto Scaling target tracking, and the VPC Hyperplane ENI.
12 min read