Upkar Lidder
Upkar Lidder is a Full Stack Developer and Data Wrangler with a decade of development experience in a variety of roles. He can be seen speaking at various conferences and participating in local tech groups and meetups.
Serverless Workshop
with Apache OpenWhisk, an open source, distributed Serverless platform
Upkar Lidder
@lidderupk
ulidder@us.ibm.com
Workshop - http://bit.ly/serverless-think-labs
IBM CLI - http://bit.ly/ibmcloudcli-standalone
Pre-requisites
IBM Cloud sign up - https://ibm.biz/BdqrPf
Prerequisites
@lidderupk
IBM Developer
1. Create IBM Cloud Account using THIS URL
3. If you already have an account, use the above URL to sign into your IBM Cloud account.
2. Check your email and activate your account. Once activated, log back into your IBM Cloud account using the link above.
https://ibm.biz/BdqrPf
@lidderupk
IBM Developer
What is Serverless
Serverless computing refers to the concept of building and running applications that do not require server management.
It describes a finer-grained deployment model where applications, bundled as one or more functions, are uploaded to a platform and then executed, scaled, and billed in response to the exact demand needed at the moment.
It refers to the idea that consumers of serverless computing no longer need to spend time and resources on server provisioning, maintenance, updates, scaling, and capacity planning. Instead, all of these tasks and capabilities are handled by a serverless platform and are completely abstracted away from the developers.
Cloud Native Computing Foundation
https://github.com/cncf/wg-serverless/tree/master/whitepapers/serverless-overview
@lidderupk
IBM Developer
Use Cases
-
Secure and scalable APIs
- API Gateway ➸ Function
- HTTP level scaling
-
Backend services / micro services
- function/service level scaling
- polyglot functions
-
Event Driven Programming
- Changes in database
- Social events
@lidderupk
IBM Developer
Leans well to ...
- Small, focused, asynchronous, concurrent, easy to parallelize into independent units of work
- Infrequent or has sporadic demand, with large, unpredictable variance in scaling requirements
- Stateless, ephemeral, without a major need for instantaneous cold start time
- Highly dynamic in terms of changing business requirements that drive a need for accelerated developer velocity
@lidderupk
IBM Developer
Example - Conference App
@lidderupk
IBM Developer
Apache OpenWhisk (js)
Entry point
Object In
Object Out
@lidderupk
IBM Developer
Apache OpenWhisk (js)
@lidderupk
IBM Developer
Exercises
@lidderupk
IBM Developer
Workshop - http://bit.ly/serverless-think-labs
IBM CLI - http://bit.ly/ibmcloudcli-standalone
IBM Cloud sign up - https://ibm.biz/BdqcDL
IBM Code Patterns
@lidderupk
IBM Developer
Serverless Landscape
Hosted
Installable
https://github.com/cncf/landscape#serverless
@lidderupk
IBM Developer
Serverless Landscape
Amazon Lambda
•Node.js, Python, Java, C# and Go
IBM Cloud Functions
•Node.js 8, Node.js 6, Python 3.6.4, Python 3.6.1, PHP 7.1, PHP 7.2, and Swift 4, Swift 3.1.1, Ruby 2.5, Docker
•Recent change – 2GB max memory and 10 minutes run limit.
Microsoft Azure
•C#, F#, Node.js (in GA), Java, Python, PHP, TypeScript, Bash, PowerShell (experimental mode)
Google Cloud Function
•Node.js, Python
This space is constantly changing !
@lidderupk
IBM Developer
Apache OpenWhisk
Apache OpenWhisk is an open source, distributed Serverless platform that supports a programming model in which developers write functional logic (called Actions), in any supported programming language, that can be dynamically scheduled and run (with Rules) in response to associated events (via Triggers) from external sources ( Feeds) or from HTTP requests.
@lidderupk
IBM Developer
Apache OpenWhisk
Packages
@lidderupk
IBM Developer
Solid Foundations
Leverages existing opensource solutions
@lidderupk
IBM Developer
Solid Foundations
Leverages existing opensource solutions
@lidderupk
IBM Developer
Built on Open Source
@lidderupk
IBM Developer
WSK CLI
@lidderupk
IBM Developer
WSK SYSTEM PACKAGES
@lidderupk
IBM Developer
WSK SYSTEM PACKAGES
@lidderupk
IBM Developer
Apache OpenWhisk (create)
wsk action create helloJava target/hello-world-java.jar --main com.example.FunctionApp
@lidderupk
IBM Developer
Apache OpenWhisk (invoke)
wsk action invoke --result helloJava --param name World
@lidderupk
IBM Developer
Apache OpenWhisk - more real example
1user registers
2tail logs
3SMS
4email
@lidderupk
IBM Developer
@lidderupk
IBM Cloud - http://bit.ly/serverless-think-labs
Apache OpenWhisk - more real example
https://github.com/lidderupk/openwhisk-registration/tree/master/javascript
@lidderupk
IBM Developer
Composition / Orchestration
CONDITION Action Name
Code
THEN Action Name
Code
ELSE Action Name
Code
@lidderupk
IBM Developer
Composition / Orchestration
@lidderupk
IBM Developer
So much more ...
-
More Compositions - Use higher-level programming constructs to declaratively chain together multiple actions.
- while, repeat, let, retry, try, if, etc
- HTTP Actions (web == true)
- Packages community (couchdb, kafka, etc)
- API Gateway (rate limiting, authentication/authorization)
- Install external packages, debugging, etc
@lidderupk
IBM Developer
Community and Help
- Slack
- http://openwhisk-team.slack.com/
- Github and OpenWhisk docs
- Youtube/Medium/Twitter
- Bi-weekly interexchange meetings
@lidderupk
IBM Developer
KUI Shell
@lidderupk
IBM Developer
KUI Shell
@lidderupk
IBM Developer
Some things to 🤔
- Functions are stateless. Need some sort of persistence between runs.
- Are you able to test and develop locally ? Does provider have CLI ?
- Can you easily version your functions ? Source control ?
- Can you easily monitor your functions ?
- Security and API gateway
- Avoid long-running loops / mini-monoliths ?
- Latency (cold, warm and hot loads)
- How do you track dependencies ?
@lidderupk
IBM Developer
Future of Serverless ?
@lidderupk
IBM Developer
Thank you
Let's chat !
@lidderupk
IBM Developer
Upkar Lidder, IBM
@lidderupk
https://github.com/lidderupk/
ulidder@us.ibm.com
IBM Cloud CLI - set region to us-south
@lidderupk
IBM Developer
@lidderupk
IBM Developer
Apache OpenWhisk - simple action
Entry point
JsonObject In
JsonObject Out
@lidderupk
IBM Developer
JsonObject In
Fat JAR
Apache OpenWhisk - sample pom.xml
@lidderupk
IBM Developer
Apache OpenWhisk - make jar
@lidderupk
IBM Developer
Apache OpenWhisk - Runtime Exception
@lidderupk
IBM Developer
Apache OpenWhisk (py)
Entry point
Dictionary
Dictionary
@lidderupk
IBM Developer
OpenWhisk
@lidderupk
IBM Developer
IBM Cloud Function
@lidderupk
IBM Developer
IBM Cloud Functions
@lidderupk
IBM Developer
Example - Banking App
@lidderupk
IBM Developer
More Examples
@lidderupk
IBM Developer
1
2
3
4
Apache OpenWhisk (java)
@lidderupk
IBM Developer
Apache OpenWhisk (tail log)
@lidderupk
IBM Developer
Apache OpenWhisk (js)
1
2
3
4
5
@lidderupk
IBM Developer
Apache OpenWhisk (py)
@lidderupk
IBM Developer
Serverless Workshop with Apache OpenWhisk, an open source, distributed Serverless platform Upkar Lidder @lidderupk ulidder@us.ibm.com Workshop - http://bit.ly/serverless-think-labs IBM CLI - http://bit.ly/ibmcloudcli-standalone Pre-requisites Plugin - https://cloud.ibm.com/functions/learn/cli IBM Cloud sign up - https://ibm.biz/BdqrPf Worksho p - https://github.com/IBM-Cloud/openwhisk-workshops/tree/master/bootcamp/
serverless-workshop
By Upkar Lidder
serverless-workshop
- 1,771
