1.
Microservices
Dmytro Lahoza
GDFS Inc.

2.
What is microservices
 Small as RaspberryPI
 Written in NodeJS
 Docker, Kubernetes etc.

3.
What is microservices
 Function calls are too reliable nowadays
 Transactions are boring
 50 API contracts is not enough

4.
Microservices
solve
organizational
problems
but
cause
technical

5.
Solve
 Team size
 Distributed team problems
 Team intercommunication

6.
Sean Treadway, SoundCloud

7.
Problems
 You need stable APIs and communication contracts
 No more shared DB no you need consensus
 Testing!
 Strong DevOps culture
 Service discovery
 Networking
 Monitoring and instrumentation
 Distributed tracing

8.
API and contracts
 Swagger
 RAML
 Synchronization
 Validation
 gRPC?

9.
Data
 No more state, no more local files
 No more single database (MongoDB, Cassandra ?)
 No more system-wide transactions
 No more fast and reliable point of consensus (Zookeeper
?)
 You need messaging (RabbitMQ, ZeroMQ ?)

10.
Testing
 No one cares about testing single service
 Now you have 50 points of failure
 No one really knows how to test microservices (hard
mocking)
 No one really knows how to test infrastructure for
microservices

11.
DevOps
 It is about culture, not people
 You create it, you support it
 Culture should cover all areas of software lifecycle
 You cannot deploy 50 microservices manually
 Service could be written in any language
 Tons of new shiny tools (Docker, Kubernetes, Terraform)

12.
Networking
 Distributed networking is cool (ha!)
 Discovery is simple (ha!!!)
 Configuration distribution is dope (ha!!!)
 Circuit breaker? What is that?

13.
Monitoring
 No more single system, no more centralized monitoring
 Distributed tracing (Zipkin)
 Logs and metrics collecting (Beats, Statsd)
 Aggregation (Logstash, Carbon)
 Visualization (Prometheus, Graphite, Kibana)
 Store and maintain all this data and systems (SRE?)
 Incident management (ITIL, Support)

14.
Security
 Internal request security (SSL, JWT?)
 Sensitive data storing and delivery (Vault?)
 No more access to single instance and fix production app

15.
Questions?

16.
Dmytro Lahoza
GDFS Inc.
Twitter: @dlagoza