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.

Infrastructure

Scale Use Cases

Stateless

Stateful

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

Variance

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