MicroServices notes

Mastering Chaos - A Netflix Guide to Microservices - Notes

Evolutionary response

• Separation of concern: modularity and encapsulation

• Scalability: horizontal, and partitioning

• Virtualization and Elasticity - automation, and on demand capacity

Dependancy

Use cases:

Intra-Service Requests

can handle non ideal issues

• network issues
• back off
• handling failure.
• can protect against one service failing?

Hystrix

FIT - Fault Injection Testing

Graceful degradation - testing the removal of things, some less important, some more.

Client libraries

Bare bones , or client libraries?

Data persistance

CAP theorem - In the event of a network partition the trade off between consistency and availability.

Scale Use Cases

Hybrid

caching layer is hybrid

consider VCache, a system for managing memcache (server) and spymemcached (client)

https://github.com/Netflix/EVCache

lessons:

separate real time from batch

Change

Dealing with incidents

Incident -> Resolution -> Review -> remediation -> Analysis -> Best practice -> Automation -> Adoption

Production Readiness Reviews

• Alerts
• Automated Canary Analysis
• Auto Scaling
• Chaos
• Consistent Naming
• ELB Config
• HealthChecks
• Immutable Machine Images
• Squeeze Testing - uwt is this ?
• Timeout, retries, fall back, circuit breaker

Reading

Mastering Chaos - A Netflix Guide to Microservices

https://www.youtube.com/watch?v=CZ3wIuvmHeM