Microservices: why you're doing them wrong_Dmytro Lahoza

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Most developers love microservice and treat them as a panacea, but they are wrong. How to stop creating problems using microservices and start solving them.

Technology

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

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

Microservices
solve
organizational
problems
but
cause
technical

Solve
 Team size
 Distributed team problems
 Team intercommunication

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

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

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 ?)

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

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)

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

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)

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

Dmytro Lahoza
GDFS Inc.
Twitter: @dlagoza

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Microservices: why you're doing them wrong_Dmytro Lahoza

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

Microservices: why you're doing them wrong_Dmytro Lahoza

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