AirBnB service auto discovery

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Growing from single monolith app to service oriented architecture. The new problems and how AirBnB are doing service auto discovery.

Software

AirBnB Service
Autodiscovery
Stockholm Python Meetup
Jun 16, 2016

About me
Ilian Iliev
Platform Engineer
ilian@lifesum.com
www.ilian.io

Starting as a monolith
● Easy at the beginning
● Hard to scale later
● Hard to detach apps
● Solution?

Services
● Small(er)
● “Independent”
● Talking to each other
● Easier to deploy and scale
● Is SOA the ultimate solution?

New problems
● Routing traffic to the correct service
● Adding and removing new instances to the pool
● What if an instance dies?

A perfect solution requirements
● Routing
● Load balancing
● Health status
● Debug single node
● Introspection
● Safe to changes in the pool
● No single point of failure

Suboptimal solutions
● DNS
● Central load balancing
● In App registration/discovery

Smart stack
● Nerve - service registration
● Synapse - service discovery

Benefits
● Immediate discovery
● Problem are detected on small intervals
● Easy to debug
● Introspection
● Distributed infrastructure

The future
● Zookeeper is still critical
● Dynamic Nerve config

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