#Serverless #Toronto community members Matt Welke (https://www.linkedin.com/in/matt-welke/) and Kudz Murefu (https://www.linkedin.com/in/kudzanai-murefu-7b128886/) introduced Google Cloud Functions and #Firebase to the community at our August meetup. It was the true "by the people, for the people" event! More info https://www.meetup.com/Serverless-Toronto/events/259718715/ Recording https://youtu.be/CorFCkcuPOI

1. Monday, Aug 12, 2019
1. Intro & Activity Update
2. Community Open Mic
3. Matt Welke: “A look at Google
Cloud Functions”
4. Kudz Murefu: “Firebase Crash
Course”
5. Networking
1
ServerlessToronto.org Meetup Agenda

2. Why we do what we do?
2
Serverless is New Agile
Serverless Dev (gluing
other people’s APIs
and managed services)
We're obsessed
helping Startups (and
creating meaningful
MVPs & products)
We build bridges
between Serverless
Community (“Dev leg”),
and Front-end & Voice-
First folks (“UX leg”),
and empower UX
developers
Achieve agility NOT by
“sprinting” faster (like in
Scrum), but by working
smarter (by using
bigger building blocks
and less Ops)

3. #ServerlessTO
Sponsors
3

4. Manning Publications 2019 giveaways:
1. www.manning.com/books/serverless-applications-with-nodejs
2. www.manning.com/livevideo/production-ready-serverless
3. www.manning.com/livevideo/production-ready-serverless
4. www.manning.com/livevideo/serverless-applications-with-AWS
5. www.manning.com/livevideo/serverless-applications-with-AWS
6. www.manning.com/books/serverless-architectures-on-aws
7. www.manning.com/books/http2-in-action
8. www.manning.com/books/event-streams-in-action
9. www.manning.com/books/the-design-of-everyday-apis
10. www.manning.com/livevideo/graphql-in-motion
11. www.manning.com/books/voice-applications-for-alexa-and-google-assistant
12. www.manning.com/livevideo/machine-learning-for-mere-mortals
13. www.manning.com/books/classic-computer-science-problems-in-python
14. www.manning.com/books/getting-mean-with-mongo-express-angular-and-node
4Check out MEAP program from our Learning Sponsor!

5. Venue Sponsor
5
As Certified B Corporation, Myplanet is purpose-driven and
creates benefit for all stakeholders, not just shareholders!

6. Catering Sponsor
6
Also an active Serverless Community member – check out
their “Data Pipelines using Serverless Architectures” talk!

7. Devinity
7

8. Devinity… continued
8

9. Community Open Mic
9
10 seconds of freedom
to pitch yourself, or
your company

10. Future Talks
2019
10

11. Upcoming Serverless Toronto Meetups
11
1. September 12, 2019: Serverless Design Patterns and
Best Practices – Mike Apted, Startup SA at AWS
2. October, 2019: Serverless CI/CD pipelines with AWS
CodePipeline and CodeBuild, vs CircleCI, vs Travis, vs
Seed – Frank Wang & Jay V
3. November or December: Serverless Heroes (authors
of “Serverless Applications with Node.js”) Slobodan
Stojanović & Aleksandar Simović will be here!
4. December or January, 2020: re:Invent recap –
Jonathan Dion, Senior Technical Evangelist at AWS

12. Feature Talks
1. Google Cloud Functions
2. Firebase Crash Course
12

13. Intro to Google Cloud
Functions
Using gcloud to deploy a Node.js function with CORS support.

14. Google Cloud Functions
Triggers
- HTTP trigger - Respond to HTTP request
- PubSub trigger - React (asynchronously) to message
- Storage - React to object added to bucket etc
- Firebase event triggers
Stateless
- Runs on temporary container with no persistent disk.
- Cannot run background tasks after response sent

15. Google Cloud Functions
Scaling
- Stays at 0 running containers when not triggered
- Scales up infinitely* as requests/messages come in
- Charged per 100ms of code running per backing
container

16. Interacting with Google Cloud
Web Console:
- See which cloud resources you have
- Explore marketplace
gcloud:
- CLI tool that can list, create, and destroy
cloud resources
- Can be used to automate

17. Demo

18. Demo - CORS
browser server
request
Access-Control-Allow-Origin: http://localhost:8080
1
2

19. Demo - CORS (OPTIONS preflight)
browser server
OPTIONS preflight request
Access-Control-Allow-Origin: http://localhost:8080
Access-Control-Allow-Methods: POST
Access-Control-Allow-Headers: Content-Type
1
2
POST request
Access-Control-Allow-Origin: http://localhost:8080
3
4

20. AWS Lambda Comparison
Similarities
- Scale down to zero containers when not in use
- Charge per 100ms
- Only allow one request per container at a time
- Be careful with SQL connections!
- Be careful of expensive long running functions
- Support HTTP APIs and reacting to cloud events

21. AWS Lambda Comparison
Similarities
- Support multiple runtimes
- GCP: Node.js, Python, Go
- AWS: Node.js, Python, Ruby, Java, Go, .NET Core (C#), custom runtimes
- Allow long running tasks
- AWS: 15 minutes (30 seconds for HTTP)
- GCP: 9 minutes (HTTP + events)

22. AWS Lambda Comparison
API Gateway - AWS
function
API
Gateway
(configurable)
browser

23. AWS Lambda Comparison
API Gateway - GCP
function
API
Gateway
(non-configurable)
browser
- Parse request based on
Content-Type
- Provide HTTPS endpoint

24. AWS Lambda Comparison
API Gateway - GCP
functionbrowser
dev perspective

25. Thank you
Finished code:
https://github.com/welkie/talk-serverless-toronto-gcp-intro
LinkedIn:
https://www.linkedin.com/in/matt-welke/
Blog:
https://mattwelke.com
Email:
mattwelke@gmail.com

26. Serverless on Firebase
Realtime database | Cloud Hosting | Functions

27. Realtime Database
➔ Nosql Cloud-hosted database.
➔ Clients share one database instance.
➔ Connected clients receive updates on data changes.
➔ Scale to 100,000 concurrent connections.

28. Web Hosting
➔ Easily deploy static/dynamic web apps to a global CDN
➔ SSL built into Firebase Hosting
➔ Can pair with cloud functions to build microservices.
➔ Provides full versioning and release management with
one-click rollbacks.

29. Deploy Single page apps
Support for production grade dynamic single page apps

30. Firebase Storage
➔ Object storage service built for Google Cloud Storage.
➔ Robust uploads & downloads, restart where they stopped, saving your
users time and bandwidth.
➔ Built on same infrastructure powering Spotify and Google Photos.
➔ Storage scales automatically, so no need to migrate to any other provider

31. Firebase Cloud Functions
➔ Run backend code in response to events triggered by Firebase features and HTTPS requests.
➔ Automatically scales up computing resources to match the usage patterns of your users.
➔ As load fluctuates(+/-), Google responds by rapidly scaling the number of virtual server instances
needed to run your function.
➔ Code is in Javascript & Typescript currently

32. Console Overview

33. Firebase console dashboard

34. Realtime database dashboard

35. Firebase functions dashboard

36. Function console logs

37. Pairing Cloud Functions with
Firebase features

38. Realtime Database triggers
➔ A change occurs in the database and an
event is triggered.
➔ Function is invoked when the event occurs
and performs its tasks.
➔ Function receives a data object that
contains a snapshot of the data stored in the
specified document.

39. Event handlers
onWrite() On data create, update, or delete.
onCreate() On new data is creation.
onUpdate() On data is updated.
onDelete() On data is deleted.
Listen for specific events on the Realtime Database:

40. Cloud Storage triggers
➔ Upload object to storage bucket.
➔ Manipulate the object & its metadata in the function.
➔ Write object location to Realtime database.
➔ Re-upload updated object back to storage.

41. Demo

42. Pricing
Free Pay as you go

43. Thank you
LinkedIn:
https://www.linkedin.com/in/kudzanai-murefu-7b128886/
My latest project:
https://strma.io