Bay Area Microservices Meetup - 2017-12-12

Transcript

1. The Fn Project Microservices Meetup, December 2017 Chad Arimura VP

   Serverless, Oracle @chadarimura Open Source Serverless Computing

2. About Me • Engineer and builder • 3x entrepreneur ◦

   1999-2006: Founding CTO of AllDorm ◦ 2008-2011: Founding Partner of Appoxy ◦ 2011-2017: Founding CEO of Iron.io • Now VP Serverless, Oracle me

3. What is Serverless? • Serverless is an abstraction of infrastructure

   and its operations including provisioning, scaling, patching, etc. • Serverless architecture is when an app is built entirely on serverless components (compute, storage, networking) • Faas is the compute component in a serverless architecture

4. Functions-as-a-Service • Functions are small bits of code that do

   one thing well and are easy to understand and maintain • As a service means no complicated plumbing, the system takes care of provisioning, scaling, patching, maintaining, etc. Each function scales independently. In mathematics, a function is a relation between a set of inputs and a set of permissible outputs with the property that each input is related to exactly one output. Function (mathematics) - Wikipedia https://en.wikipedia.org/wiki/Function_(mathematics)

5. Containers vs Functions Function is a container with a set

   of known traits: • Short running • Ephemeral • Stateless • Invoked • Single Purpose • Self-contained

6. What about Microservices?

7. Introducing the Fn Project • Launched in October focused on

   open source (apache 2), multi-cloud, serverless services, starting with FaaS • Iron.io team joined Oracle, now a 20-person “serverless” org • Maniacal focus on the developer experience • Independently governed at github.com/fnproject (currently) • Members on the CNCF serverless working group • We are building our community and partnerships

8. For Developers

9. An Fn Function • Small chunk of code wrapped into

   a container image • Gets input via STDIN and environment • Produces output to STDOUT • Logs to STDERR The Fn server handles everything else, like the API gateway, piping things around, storing logs, etc.

10. Fn CLI • fn init --runtime go • fn run

    • fn test • fn deploy --app myapp • fn call myapp myfunc → http://localhost:8080/r/myapp/myfunc

11. Function Development Kits (FDKs) • Used to help with parsing

    input and writing output • Familiar syntax for Lambda developers • Simply write a `handler` function that adheres to the FDK’s interface and it will parse STDIN and provide the input data to your function and deal with writing the proper output format. • Makes it a lot easier to write hot functions

12. Debugging • fn calls list myapp • fn calls get

    myapp <call-id> • fn logs get myapp <call-id> • Metrics created using OpenTracing w/ initial collectors and extensions for Prometheus, ZipKin, and soon Jaeger

13. Fn UI

14. Under the Hood

15. Architecture

16. Fn Server • Handles CRUD operations for setting up routes

    and functions • Executes sync functions, returning responses to clients immediately • Queues async function calls • Executes async functions when capacity is available • Written in Go, easy to extend via plugin module system

17. Fn LB • Simple, fast load balancer that routes functions

    to certain nodes consistently for hot function efficiency • Scales each function independently based on traffic to any particular function • Can be used to scale Fn servers and infrastructure as well as it has a view of global state of all fn servers

18. Supporting Services • DB, MQ, blob store are all pluggable

    modules that are thin wrappers around their respective drivers. ◦ DB: MySQL, sqlite3, Postgres ◦ Queue: Redis, Kafka ◦ Registry: Any Docker v2-compliant, even private • Metrics/Monitoring ◦ OpenTracing API for metrics ◦ Prometheus support, pluggable backends ◦ Logging via syslog

19. Kubernetes • Fn is scheduler agnostic but lots of optimization/management

    work in process to optimize on Kubernetes • Helm chart available at https://github.com/fnproject/fn-helm • Thinking about deeper Kubernetes integrations including CRD’s to model functions

20. Fn Demo

21. More Advanced Fn

22. Fn Flow • Build long-running, reliable, scalable functions with rich

    sets of language-specific primitives including fork-join, chaining, delays and error handling • Supports complex parallel processes that are readable and testable (including unit tests) with standard programming tools • Java support using CompletableFuture API from Java 8 with JS, Python, Go language support on the way!

23. Plate Detect Function Draw Function Slack Function Twitter Function Scraper

24. Scraper Plate Detect Function Draw Function Slack Function Twitter Function

    FlowFuture.invoke() thenCompose() thenCompose() allOf() whenComplete()

25. Scraper Plate Detect Function Draw Function Slack Function Twitter Function

    FlowFuture.invoke() thenCompose() thenCompose() allOf() whenComplete() Flow Function
26. None

27. Flow Demo

28. Thank you! 1. Star the project: github.com/fnproject/fn 2. Join the

    conversation: slack.fnproject.io 3. Learn more: fnproject.io 4. We’re hiring engineers and evangelists: chad.arimura@oracle.com Chad Arimura VP Serverless, Oracle @chadarimura Get Involved