Intro to Serverless
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Common considerations on Serverless architecture, AWS Lambda (including Serverless Framework) and ECS. Also introduces Guanyu, an open-sourced wrapper to Sophos-AV Free edition, as example to demonstrate patterns and tradeoffs in architecture.
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Intro to Serverless
- 1. Guanyu Serverless Cliff Chao-kuan Lu Modern Web 16, Taipei
- 2. • CC-BY 4.0 • Slideshare • • Guanyu
- 3. `whoami` • Cliff Chao-kuan Lu • 104 • AWS Community Hero Certified Pro SA •
- 4. Crash Course: Cloud • Much has changed since ’11 NIST definition • Ecosystem with vendors and open source projects • /w+aaS/ IaaS, PaaS, SaaS, DBaaS, FaaS, BaaS, … • Micro-services glued with managed services • Housekeeping services for monitoring, logging, and stack management
- 5. Serverless Architectures • FaaS / BaaS / Container • Message-, UI-, or event- driven • Stateless • Cold-start latency • Cost and Scalability • Minimal but not no operation http://martinfowler.com/articles/serverless.html
- 6. AWS Lambda • Managed Function as a Service • Ram (CPU), Timeout, Role & VPC • Node.js, Python, Java, … • Integration with IAM / CloudWatch / Logs • Unlimited potential* *standard rates apply
- 7. AWS Lambda • Pull and push model • Concurrency cap (soft limit) • No shared memory (shm) • Potentially shared /tmp • Burstable / Throttled CPU
- 8. Lambda Frameworks • Apex http://apex.run/ • Claudia https://github.com/claudiajs/claudia • Serverless Framework (formerly JAWS) http://serverless.com/
- 9. Serverless Framework • CLI tool for API Gateway / Lambda • Written in Node.js • Supports Node.js, Python & Java • Deploy to regions and stages • Fast-moving open-sourced project
- 10. Serverless v0.5 • Leverage API Gateway templates and mappings • Run lambda program remotely or locally • Manage IAM Role with CFN, API Gateway and Lambda via API • Plugins available
- 13. Migrating to@1.0.0-beta • Manage IAM Role, API Gateway, Lambda with CFN • Abstract away API Gateway templates • Move metadata to S3 • Functions can share the same folder • Plugin API changed…
- 14. Serverless Will … • Support `environments` in Function body • Share API Gateway / Lambda between stages • Encrypt metadata with KMS • Enhance tooling and docs for Plugin dev • Resurrect vendor support
- 15. But, I Need More … • Control • Flexibility • Power
- 16. Introducing Guanyu • Sophos-AV (free) as a Service • Express / Node.js • ~300MB Memory per scanning process • Binary size ~1GB • 6-10s per object scan https://github.com/clifflu/guanyu-docker
- 17. AWS Elastic Container Service • Yet another Docker scheduler • Native monitoring, logging, and authorisation • Flexible privilege control with host and task roles • Supports AWS Application Load Balancing
- 18. Application Load Balancing • GA August ’16, extends ELB • Content-based routing • HTTP/2 and WebSocket support • Dynamic ports
- 19. AWS Elastic Container Service • Prepare EC2 for ECS • Okay-ish data persistence with EBS / EFS • Lacks transparent inter-container traffic encryption • Promotes [LB -> Container] in every tier
- 20. Guanyu Features • Token-based authentication • Result caching with memory, Redis & DynamoDB • Highly-Customisable • MIT License https://github.com/clifflu/guanyu-docker
- 21. Guanyu in AWS • ECS on top of AutoScaling Group • Supports external cache with Redis & DynamoDB • Dynamic port behind ALB • Track logs in CloudWatch Logs • Periodic health check with ALB
- 23. Guanyu • Lacks one-click deploy • Immature cache mechanism • TTL • Edge cases • PR Welcome !
- 24. Projects • Guanyu https://github.com/clifflu/guanyu-docker • Serverless ModernWeb ’16 https://github.com/clifflu/serverless-modernweb-16 • Tools (tools.clifflu.net) https://github.com/clifflu/tools.clifflu.net
- 25. Questions ?
- 26. Thank You !