Introduction to serverless computing on Google Cloud

Introduction to serverless
computing on Google Cloud
Wesley Chun
Developer Advocate, Google
Contribute
questions at:
goo.gl/Rq6ABI
G Suite Dev Show
goo.gl/JpBQ40
About the speaker
Developer Advocate, Google Cloud
● Mission: enable current and future
developers everywhere to be
successful using Google Cloud and
other Google developer tools & APIs
● Videos: host of the G Suite Dev Show
on YouTube
● Blogs: developers.googleblog.com &
gsuite-developers.googleblog.com
● Twitters: @wescpy, @GoogleDevs,
@GSuiteDevs
Previous experience / background
● Software engineer & architect for 20+ years
● One of the original Yahoo!Mail engineers
● Author of bestselling "Core Python" books
(corepython.com)
● Technical trainer, teacher, instructor since
1983 (Computer Science, C, Linux, Python)
● Fellow of the Python Software Foundation
● AB (Math/CS) & CMP (Music/Piano), UC
Berkeley and MSCS, UC Santa Barbara
● Adjunct Computer Science Faculty, Foothill
College (Silicon Valley)

Serverless: what & why
● What is serverless?
○ Misnomer: of course there's a server somewhere
○ You just don't have to worry about it!
○ Forbes (May 2018): Serverless... [helps] developers focus on writing code without having to
worry about infrastructure... servers (physical & virtual) completely abstracted away from the
user. [Developers] ... focused on solving business problems (e.g., faster app deployment)
● Why serverless?
○ Fastest growing segment of cloud... per 2 analysts*:
■ $1.9B (2016) and $4.25B (2018) ⇒ $7.7B (2021) and $14.93B (2023)
○ Unless focused on DevOps... VMs, networking, load balancing, web servers,
database servers, frontends/proxies, etc. less relevant for app-builders
○ What if you go viral? Autoscaling: your new best friend
○ What if you don't? Code not running? You're not paying. (No VMs to shutdown.)
* in USD; source: MarketsandMarkets™ & CB Insights (Aug 2018)
Google Compute Engine, Google Cloud Storage
AWS EC2 & S3; Rackspace; Joyent
SaaS
Software as a Service
PaaS
Platform as a Service
IaaS
Infrastructure as a Service
G Suite (Google Apps)
Yahoo!Mail, Hotmail, Salesforce, Netsuite
Google App Engine, Cloud Functions
Heroku, Cloud Foundry, Engine Yard, AWS Lambda
Google BigQuery, Cloud SQL,
Cloud Datastore, NL, Vision, Pub/Sub
AWS Kinesis, RDS; Windows Azure SQL Database
Serverless: PaaS-y compute/processing
Google Apps Script, App Maker
Salesforce1/force.com

Google App Engine
App-hosting in the cloud
Why does App Engine exist?

App Engine to the rescue!!
●Easy to build
●Easy to manage
●Easy to scale
● Enables greater developer productivity!
● Focus on building your app, not sys admin
● Let us wear the pagers!
● BUT don't confuse App Engine w/IaaS services!
Not all apps user-facing or web-based!!
● Need backend server processing? Want to build your own?
● No UI needed for app to talk to App Engine, just need HTTP
● Great place for user info e.g., high scores, contacts, levels/badges, etc.
● Better UI: move user data off phone & make universally available

Hello World (3 files)
app.yaml
runtime: python37
main.py
from flask import Flask
app = Flask(__name__)
@app.route('/')
def hello():
return 'Hello World!'
requirements.txt
Flask==1.0.2
App hosting plus a domain name!
$ gcloud app deploy
browser URL:
https://APP_ID.appspot.com
Ex: https://wescpy-apitest.appspot.com
How to deploy and where to run it
$ gcloud app deploy
● Browser
● cURL
● Mobile apps (backend, no UI needed!)
● etc.
browser URL:
https://APP_ID.appspot.com
Ex: https://wescpy-apitest.appspot.com

Languages supported
Languages
● Python 2.7 & 3.6
● Node.js
● Ruby
● Java 8 / Servlet 3.1
● Jetty 9
● PHP 5.6, 7
● Go 1.8, 1.9, 1.10
● C#/.NET
● custom
Open Capabilities
Flexible Runtime
Languages
● Python 2.7, 3.7
● Java 7, 8
● PHP 5.5, 7.2
● Go 1.6, 1.8, 1.11
● Node.js 8
"Constrained" Capabilities
Incredibly rapid scale
Bold == 2nd generation
Standard Runtime
Google Cloud Functions
Function-hosting in the cloud

"Hello World" Python Cloud Function
main.py
def hello_world(request):
return 'Hello World!'
$ gcloud functions deploy hello --runtime python37 --trigger-http
curl:
curl -X POST https://[GCP_REGION]-[PROJECT_ID].cloudfunctions.net/hello
-H "Content-Type:application/json" --data '{"value": "123"}'
browser:
http://[GCP_REGION]-[PROJECT_ID].cloudfunctions.net/hello?value=123
Ex: https://us-central1-myproject-ccsc.cloudfunctions.net/hello
Google Cloud Functions
Languages Supported
● Node.js 6, 8 (JavaScript)
● Python 3.7
Deploying Cloud Functions
● Create locally then deploy on cmd-line OR
● Edit and deploy from developer web console
Triggering Cloud Functions (response to events)
● HTTP — via HTTP request
● Cloud Storage — bucket object/metadata CRUD
● Cloud Pub/Sub — new message
● Firebase (DB, Storage, Analytics, Auth)

Test tool
Google Apps Script (and App Maker)
Customized JS runtime for G Suite automation, extension, and integration

Sheets-bound “Hello World!”
Apps Script intro
goo.gl/1sXeuD
Sheets-bound “Hello World!”

What can you do with this?
Accessing maps from
spreadsheets?!?
goo.gl/oAzBN9
This… with help from Google Maps & Gmail
function sendMap() {
var sheet = SpreadsheetApp.getActiveSheet();
var address = sheet.getRange("A2").getValue();
var map = Maps.newStaticMap().addMarker(address);
MailApp.sendEmail(EMAIL, "Map", map.getMapUrl());
}
JS

Session Summary
● Why go cloud?
○ Cloud computing has taken the world by storm
○ You're behind if you're not already using it… it's not too late!
○ Help train the next generation cloud-ready workforce!
● Google Cloud and why serverless?
○ Many features: compute, storage, AI/ML, NW, data processing, etc.
○ Serverless lets users focus on just their logic (apps or functions)
○ Interesting possibilities using both platforms (GCP + G Suite)

References
● G Suite and Google Apps Script documentation
○ developers.google.com/gsuite
○ developers.google.com/apps-script
● GCP docs source code (i.e., App Engine & Cloud Functions quickstarts)
○ github.com/GoogleCloudPlatform/python-docs-samples
○ github.com/GoogleCloudPlatform/nodejs-docs-samples
● Inspirational demo apps' resources
○ cloud.withgoogle.com/next18/sf/sessions/session/156878
■ cloud.google.com/blog/products/application-development/
adding-custom-intelligence-to-gmail-with-serverless-on-gcp
■ bit.ly/2OcptaG
○ NEXT '19: cloud.withgoogle.com/next/sf/sessions?session=DEV212
Learning resources
● Codelabs: self-paced hands-on tutorials
○ Google codelabs: need a Gmail account, always free
■ g.co/codelabs/cloud
○ Qwiklabs codelabs: don't need a Gmail acct; typically not free
■ google.qwiklabs.com
■ Individuals can request 200 more credits; 5000 credits for use in courses
● Official GCP docs: cloud.google.com
○ Recommended: Getting Started, Cloud Console, Cloud Shell, Cloud SDK, GCP
Free Tier (need a credit card), Community
● YouTube video series: youtube.com/GoogleCloud
○ Recommended: Cloud Minute shorts & Cloud NEXT videos
○ G Suite Dev Show: goo.gl/JpBQ40

Resources for Higher Education
● Education grant program
○ Teaching grants (per-course basis)
■ $50USD for students
■ $100USD for faculty & TAs
■ You'll barely use any of it… key: no need to give Google a credit card
○ Research grants
■ Larger amounts, granted for longer period of time
○ Turnaround time: 3-4 business days
● Teacher center
○ teachercenter.withgoogle.com/gcp
○ Apply here for education grants
○ Apply here for Qwiklabs credits
Thank you! Questions?
Wesley Chun
@wescpy

Introduction to serverless computing on Google Cloud

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