This document discusses building composable serverless applications using the iopipe module. The iopipe module allows chaining together serverless functions, code sharing, and running functions anywhere including AWS Lambda, Docker, and local CPUs. It provides tools for function composition, monitoring performance metrics, and deploying functions. Composable serverless applications can be built by connecting together inline functions, stored functions, and deployed HTTP endpoints using iopipe.

1. Building Composable Serverless Apps
Eric Windisch
IOpipe, Inc.#iopipe

2. Eric Windisch
CEO, Co-founder
Twitter: @ewindisch
Email: eric@iopipe.com
Contributor:

3. Apache 2.0 licensed
Composion / Chaining
Code sharing
Scatter/Gather
Run anywhere (not just AWS)
NodeJS module
(Go library - experimental)
CLI tool
is...

4. Compose:
Inline functions
Stored functions
Deployed Serverless functions
HTTP endpoints

5. GPU
EXEC
module.exports =
iopipe.define(
function(event, context) {
context.done(event)
}
)
Docker
Raspberry Pi
Local CPU
Ship, Run, Deploy anywhere

6. $ iopipe pull ewindisch/watson-natural-language-classifier

7. ewindisch/watson-natural-language-classifier

8. Functional functions
- map // "for each"
- tee // fork
- reduce // array to scalar
- etc...
Functionsthat takeoutsideparameters
and return composablefunctions.
Compatiblewith Rambda

11. Amazon Echo trademark of Amazon, Inc. All rights reserved.
"Alexa,
If someoneapproaches
my door with aweapon,
text me."

12. ?I ' m sor r y Dave,
I cannot do t hat . ?
- - Hal 9000
2001: A Space Odyssey (1968) - IMDb

13. Lambda
API
function()
URN

14. 1. Find/discover/identify door camera
2. Create workflow:
a. Take snapshot(s) using camera API (or accept as event)
b. Upload snapshot(s) to Google Vision API
c. Retrieve results JSON: [
"weapon",
"gun",
"person",
"male",
etc...
]
d. Condition: if not person && weapon {
exit
}
e. Use API to text $number
3. Register event (webhook, cron job, etc).

15. var iopipe = require("iopipe")()
var Dockaless = require("dockaless")
var dals = Dockaless()
export.handler = iopipe.define(
iopipe.property("url"),
iopipe.fetch,
dals.make_lambda("ffmpeg", [ "-i", "pipe:0", "-vf", "scale=320:240", "pipe:1" ])
)

20. f4(f3(f2(f1(x))))
==
(f4 ? f3 ? f2 ? f1)(x)
==
iopipe.define(f1, f2, f3, f4)(x)

22. OPS

25. GPU
EXEC
Docker
Raspberry Pi
Local CPU
IOpipe
Collector
Console
time-series
fluentd
code graph

26. How often is a function called?
How much memory does it use?
How long does it run?
Estimate deployment/usage costs
How functions can be composed.

27. Graphing Composition
f6(f3(f2(x)))

28. An app that matches
spoken words to serverless
functions.
#NoDev

29. DIY Serverless "Alexa" powered by Watson

30. @IOpipes
Download, hack, contribute:
www.github.com/iopipe/iopipe
www.iopipe.com