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Intro to Fn in 10 Minutes
JeffConf 2/16/18
Chad Arimura
VP Serverless, Oracle
@chadarimura
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About Me
● Engineer and builder
● 3x entrepreneur, most recently founding CEO of Iron.io
● Blame us (at least partially) for Jeff
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What is Serverless?
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Why Serverless?
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Introducing the Fn Project
● Open-source serverless compute platform created by Iron.io
team that built IronFunctions
● Can be deployed to any cloud and on-premise
● Active w/ 2500+ commits across 60+ contributors
● Independently governed with plans for foundation
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Differentiators
● Open source and runs anywhere
● Containers as primitives (bring-your-own-dockerfile)
● Simple, elegant, and extensible by design
● Independent yet vendor backed
● Strong enterprise focus (security, scalability, observability, etc.)
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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.
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Fn CLI
● fn init --runtime go
● fn run
● fn test
● fn deploy --app myapp
● fn call myapp myfunc
→ http://localhost:8080/r/myapp/myfunc
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Demo #1
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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!
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Plate Detect
Function
Draw
Function
Slack
Function
Twitter
Function
Scraper
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Scraper
Plate Detect
Function
Draw
Function
Slack
Function
Twitter
Function
FlowFuture.invoke()
thenCompose()
thenCompose()
allOf()
whenComplete()
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Scraper
Plate Detect
Function
Draw
Function
Slack
Function
Twitter
Function
FlowFuture.invoke()
thenCompose()
thenCompose()
allOf()
whenComplete()
Flow Function
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No content
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Demo #2
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Thank you!
Chad Arimura
VP Serverless
@chadarimura
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