Dr Frank Munz @frankmunz www.munzandmore.com/blog #DevoxxMA Serverless Architectures DOAG 2017

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• Founded munz & more in 2007 • > 15 years Middleware, Cloud, and Distributed Computing • Consulting and High-End Training • Wrote two WebLogic and a Cloud book Dr. Frank Munz @frankmunz

Content 1. Clouds 2. FaaS (AWS Lambda) 3. Serverless 4. Frameworks (Fn Project) 5. Conclusion #serverless @frankmunz

Clouds #serverless @frankmunz

API @frankmunz

Elasticity

Pay Per Use • 1 US cent/h (micro), geo-distribution included • You own a massively parallel, distributed and highly available supercomputer with linear costs: 1 instance for 100 hours $= 100 instances for 1h @frankmunz

Cloud Computing API Elasticity Pay per use Fully Programmable Data Center

PaaS IaaS Amazon EC2 Oracle CI AWS Beanstalk Oracle ACCS FaaS AWS Lambda Oracle TBD Automated elasticity. True pay per use. Container Service AWS ECS OCCS API? Elasticity? Pay per use?

AWS Lambda #serverless @frankmunz

FaaS: AWS Lambda • AWS announced Lambda in 2014 • Lambda is Function as a Service (FaaS) @frankmunz

AWS Lambda AWS SAM Local: test and locally run Lambda (Public Beta) event: event passed to function context: runtime context callback: optional return (or null) @frankmunz

Create Lambda S3 @frankmunz Vendor lock-in?

Lambda Tech Details I • Stateless, with 5 min max exec time • Start threads and processes • Events based, but no event bus visible • Retries + dead letter Q • You can use environment variables • Invocation times differ per language and per call @frankmunz

Lambda Tech Details II • No config for scaling • You pay for GB *s, metered in 100 ms • One event can trigger several funcs • Function executes at least once (-> idempotent f) • AWS Step Function: visual designer • No SLAs @frankmunz

Test Code 1 2 3 4

Example: REST Request

Example: Image Recognition Flow munz & more #19 Extract meta data AI based recognition Create thumbnail How to model flow?

λ Example: BaaS Define an Intent with Slots and Utterances speechlet

Pricing Every started request is charged: • First 1 million req/month are free, forever + 400,000 GB seconds of compute time • Measured in increments of 100 msec • $0.20 per 1 million req + $0.00001667 per GB second Tip: Use AWS Cloud Watch alarms for billing! @frankmunz

Cost Savings Expedia(2016): – 2.3 billions calls – 200k hours / month – $ 550 a month Postlight – API GW, Lambda, Serverless – Costs dropped 2 orders of magnitude down to $ 370 https://www.youtube.com/watch?v=gT9x9LnU_rE https://trackchanges.postlight.com/serving-39-million-requests-for-370-month-or-how-we-reduced-our-hosting-costs-by-two-orders-of-edc30a9a88cd http://serverlesscalc.com/ @frankmunz

FaaS #serverless @frankmunz

Function as a Service • Automated elasticity • True pay per invocation • Ephemeral compute Definition Characteristics • Event based • Reduced control plane (mem + CPU + I/O) • Uses container tech

AMIGO: Public Cloud Services Amazon Microsoft IBM Google Oracle Name Lambda Azure Functions Open Whisk Cloud Functions tbd Year 2014 2016 2016 2016 2016 Status prod prod prod beta announced Language Support NodeJS 4.3.2, Java8,Python 2.7, .Net C#, native Linux JS, PHP, C#, F#, Python, bash, PowerShell NodeJS, Java, Phython, (Docker) NodeJS (not Java) Docker based ? Remarks Bundle functions, OneDrive and Bot integration Apache Incubator Deploy from github or BitBucket, CLI Based on open source Fn Project? Link https://aws.amazon. com/lambda/ https://azure.microsoft.co m/en- us/services/functions/ https://openwhisk.apa che.org/ https://azure.microsoft.co m/en- us/services/functions/ https://cloud.oracle.com/home

Security “Try to attack something that only lives for few milli-seconds” (AWS) @frankmunz

Youtube: Gone in 60ms https://www.youtube.com/watch?v=YZ058hmLuv0 @frankmunz

Microservices Developing a single application as • a suite of small services • each running in its own process / owns it‘s data • communicating with lightweight mechanisms (M. Fowler / J. Lewis) https://martinfowler.com/articles/microservices.html @frankmunz

FaaS = Microservice? • FaaS fulfills M. Fowler’s microservices definition • A real micro service consists of multiple functions • FaaS vs. Docker / Kubernetes? ✅ Benefits of FaaS - Serverless - Zero config auto scaling - True pay per use -> higher abstraction Limits of FaaS - Language choice - Resource limits - Vendor lock-in -> reduced flexibility @frankmunz

Serverless #serverless @frankmunz

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Serverless Mark Cavage, Java One 2017: “Reduce notion of all infrastructure” Serverless Example: AWS SQS 1 Mio Req $0.40 @frankmunz Wasn’t that PaaS ? Yes it‘s PaaS, but serverless requires… • Never pay for idle • Automated elasticity • Reduced config settings

Frameworks #serverless @frankmunz

Serverless Frameworks dealing with … @frankmunz AWS Chalice Portability Complexity Standards

FaaS OS Frameworks Overlap in functionality -> expect consolidation Survival is about: • Integration: K8s, Traefik, Zipkin, Prometheus, Kafka etc. • Adoption, adoption, adoption • FaaS as PaaS implementation? https://github.com/faas-lane/ FaaS-Lane/tree/master/candidates @frankmunz

Fn Project • Apache 2, Open Source Java One 2017 • Fn Server (micro API GW), LB, Flow • Function / Container duality • Docker is only dependency -> polyglot @frankmunz

Fn Project • Jackson for JSON marshalling in Java • JAX-RS demo • Hot functions (30 seconds) • Fn PaaS service likely? J @frankmunz

Fn Flow Java 8 CompletableFutures API

Fancy a demo?

Outlook • Oracle’s Cloud Native Container strategy – Kubernetes – Wercker – Pay per invocation (?) • Fn Project as PaaS and on premises • Azure Container Instance: pay per invoke (today!) @frankmunz

Conclusion #serverless @frankmunz

TL;DR #serverless & #FaaS in all major clouds / could compose µ out of / PaaS ⊇ Serverless ⊇ FaaS / FaaS = stateless / true pay per use / automated scalability / event driven / integrates with other CS / architect against vendor lock in / cloud agnostic FaaS frameworks emerge / FaaS frameworks consolidation ahead / only technically the new µ (AWS). @frankmunz

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