Applications orientées événements et traitement …...Open (Apache 2) & open ecosystem Supports...

Applications orientées événements et traitement sans serveur (“serverless”)

Catherine Ezvan (@cezvan)Senior Certified IT SpecialistIBM Cloud

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Let’s talk about…

● Why we need event-driven infrastructure

● Requirements for event-driven infrastructure

● Introducing OpenWhisk

● Conclusion

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Welcome to Industrial internet!

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Devices can be...

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How would you implement it?

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OK, let’s move step by step

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And if you want it to be HA?

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What about another device?

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Let’s be smart!

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An unexpected spike!

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Scaling out!

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And traffic goes down...

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An excessive compute?

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Or maybe those ones?

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And in the meantime...

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And further down...

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And...

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One process, one container

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One process, one container

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But if we don’t scale fast...

How much does it cost?

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Ideal case

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Compute follows traffic

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Compute follows traffic

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So what are the requirements?

● Invoke and scale as fast as possible● Terminate after completion

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● Invoke and scale as fast as possible● Terminate after completion● Charge per compute used

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● Invoke and scale as fast as possible● Terminate after completion● Charge per compute used● Guaranteed message delivery● Load balancing● High availability● Self-healing

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● Support of multiple technologies● Have possibility to launch other

microservices● Write and read data from multiple

data sources

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● Support of multiple technologies● Have possibility to launch other

microservices● Write and read data from multiple

data sources● Abstract developers from the

infrastructure

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OpenWhisk in a nutshell

„Event-action platform to execute code in response to events“

* whisk (v): to move nimbly and quickly (source: merriam-webster.com)

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„Event-action platform to execute code in response to events“

Delivered as open source & managed service on IBM Bluemix

* whisk (v): to move nimbly and quickly (source: merriam-webster.com)


Swift

Application

Container VMCF

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Polling

1b

Request

1a

Traditional model

• Continous polling due to missing event programming model

• Charges even when idling due to poor utilization

Process & idle


Swift

Application

Container VMCF

2

Polling

1b

Request

1a

Traditional model



• Worry about scaling- When to scale? (mem-, cpu-, response time-driven)- How fast to scale?

Process & idle


Swift

Application

Container VMCF

2

Polling

1b

Request

1a

Traditional model



• Worry about scaling- When to scale? (mem-, cpu-, response time-driven)- How fast to scale?

• Worry about resiliency- At least 2 processes for HA (driving cost)- Deployment in multiple regions (driving cost)- Keep them running & healthy

Process & idle


OpenWhisk

• Introduces event programming model• Charges only for what is used due to optimal

utilization Pool of actions

Swift DockerJS

Trigger

1

Running action

Running action

Running action

3

Deploy action within millisecs,run it, free up resources

OpenWhisk Engine

2


OpenWhisk


utilization

• Scales inherently- One process per request

Pool of actions

Swift DockerJS

Trigger

1

Running action

Running action

Running action

3


OpenWhisk Engine

2


OpenWhisk


utilization

• Scales inherently- One process per request

• No cost overhead for resiliency- No long running process for HA

Pool of actions

Swift DockerJS

Trigger

1

Running action

Running action

Running action

3


OpenWhisk Engine

2


} 1

Event Providers

OpenWhisk

NoSQL DB (ex. Cloudant)

Push Notifications

…

…

…

Data event occurs, e.g.-Commit on a Git Repository-CRUD operation on NoSQL DB (Cloudant)-….

Trigger execution of associated OpenWhisk action

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…JS Swift Docker …


OpenWhisk

JS Swift Docker …

Incoming HTTP request, e.g.HTTP GET mynewcoolapp.com/customers

1 2 Invoke associated OpenWhisk action „getCustomers“

Browser

Mobile App

Web App

Variety of languages


• Services define the events they emit as triggers, and developers associate the actions to handle the events via rules

• The developer only needs to care about implementing the desired application logic - the system handles the rest

T R A


Trigger: „A class of events that can happen“T


A Actions: „An event-handler, i.e. code that runs in response to an event“


A

AA:= A1

+ A2+ A3

AB := A2+ A1

+ A3

AC:= A3

+ A1+ A2

Actions: Can be chained to create sequences to increase flexibility and foster reuse


R

R := T A

Rules: „An association of a trigger and an action“


myActionmyFeedT

A

Packages: „A shared collection of triggers and actions“P

A forecast

OpenSource YoursThird

Party

translatelanguageIdtextToSpeechA

AA

databaseCreatedocumentRead...changesT

AAA

Push Notifications

sendMessagewebhookT

A

webhookT

postA

WebsocketsendA

OpenWhisk in action, on Bluemix - Dark Vision by Fred Lavigne

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1. User uploads video from mobile device2. Cloud (Watson services) analyze frames to detect

products, objects, faces, text3. Use results to deliver improved navigation,

recommendations, search

https://www.youtube.com/watch?v=1teIMpkI_Sg

You want to try OpenWhisk on your own?

• Want to try out our IBM Bluemix OpenWhisk offering?Sign-up today at: https://new-console.ng.bluemix.net/openwhisk/

• Want to try out our IBM Bluemix OpenWhisk offering?Sign-up today at: https://new-console.ng.bluemix.net/openwhisk/

• Want to try out our open-source OpenWhisk offering?Visit: https://developer.ibm.com/openwhisk/

You want to try OpenWhisk on your own?

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Serverless deployment & operations model

Optimal utilization & granular pricing

Flexible programming model

Open (Apache 2) & open ecosystem

Supports higher-level programming constructs (e.g. sequencing)

Open interface for event providers

Scales on a per-request basis

Polyglot support

Rich set of services available in Bluemix (incl Watson)

Leverages Docker, Kafka, Consul, …

References• General Availability: What’s new in IBM Bluemix OpenWhisk?

• Articles, media and much more on Github Awesome OpenWhisk

• Press and analysts focusing on serverless:– The Wall Street Journal: Look Ma, No Server: Corporate IT

Expects ‘Serverless’ Computing to Trigger Big Changes– Forbes: Three Ways That "Serverless" Computing Will Transform

App Development In 2017– Forbes: Why Enterprises Should Care About Serverless Computing49

Thank you!

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@cezvan

Applications orientées événements et traitement …...Open (Apache 2) & open ecosystem Supports...

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