A Gentle Introduction to Building Serverless Apps with MongoDB Stitch

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Joe Karlsson An Gentle Introduction to Building Serverless Apps with MongoDB Stitch @JoeKarlsson1

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How’s this talk going to work? @JoeKarlsson1

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{ name: “Joe Karlsson”, company: “MongoDB”, title: [ “Developer Advocate”, “Software Engineer” ], twitter: “@JoeKarlsson1”, website: “joekarlsson.com”, }

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Agenda ▪ Quick MongoDB overview ▪ Intro to Serverless ▪ Guided Serverless tutorial with Stitch @JoeKarlsson1

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MongoDB Overview *I promise this will be fast and hopefully actually useful @JoeKarlsson1

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Scale cheaper! As the size of your database grows, scale horizontally. @JoeKarlsson1

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Program faster! Documents map to data structures in most popular languages. Update Your Profile @JoeKarlsson1 { first_name: "Paul", surname: "Miller", cell: "447557505611", city: "London", location: [45.123,47.232], profession: ["banking", "finance", "trader"], cars: [ { model: "Bentley", year: 1973 }, { model: "Rolls Royce", year: 1965 } ] }

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SQL MongoDB Query faster! Stop doing expensive joins to get your data. ID a ... 1 b ... 2 ... ... 3 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... { ...  a: “b”,  ... c: {  d: “e”  ...  },  ... } @JoeKarlsson1

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Pivot easier! Easily change the shape of your data as your app evolves. SQL MongoDB {  a: “b”,  c: “one”,  e: “f” } {  a: “b”,  c: 1,  new: “no biggee” } ALTER TABLE `mydb`.`letters_table` DROP COLUMN `e`, ADD COLUMN `New` VARCHAR(45) NULL AFTER `C`, CHANGE COLUMN `C` `C` INT NULL DEFAULT NULL ; @JoeKarlsson1

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Term mapping summary Row Column Table Database Index Join Join Left Outer Join Recursive Common Table Expressions View Transaction Document Field Collection Database Index Embedding Database References $lookup $graphLookup View Transaction @JoeKarlsson1

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Did you know that? • MongoDB supports distributed ACID transactions? • MongoDB added field level encryption? • MongoDB is now PCI compliant? • MongoDB now has schema validation? @JoeKarlsson1

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@JoeKarlsson1

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Agenda ▪ Quick MongoDB overview ▪ Intro to Serverless ▪ Guided Serverless tutorial with Stitch @JoeKarlsson1

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What is Serverless? @JoeKarlsson1

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Devs don’t manage anything, except for their application code @JoeKarlsson1

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@JoeKarlsson1

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▪ No managing of infrastructure whatsoever. ▪ No provisioning. ▪ No patching. ▪ No capacity planning. ▪ No scaling. @JoeKarlsson1

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77%   increase in delivery speed Serverless Survey: +77% Delivery Speed, 4 Dev Workdays/Mo Saved & -26% AWS Monthly Bill by Annika Helendi @JoeKarlsson1

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@JoeKarlsson1

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@JoeKarlsson1

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@JoeKarlsson1

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What is  MongoDB Stitch? @JoeKarlsson1

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A serverless platform that makes it easy to build modern, cross-platform apps with MongoDB @JoeKarlsson1

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What is MongoDB Stitch? QueryAnywhere Functions Triggers Mobile Sync  @JoeKarlsson1

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MongoDB Cloud Architecture @JoeKarlsson1 Mobile App Frontend App Frontend App MongoDB Mobile Backend Monolith or Microservice(s) REST API or SDKs for iOS/Android/JavaScript Stitch Connection String (any driver) Stitch Triggers Stitch Atlas Cloud Infrastructure Coming 2020 Mobile Sync (beta)

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MongoDB Stitch Architecture @JoeKarlsson1

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API ELB Stitch Core Request Processing Atlas Stitch Metadata 1 Stitch Architecture (Single Region) Services Stitch requests first hit a load balancer which distributes them across available capacity within a region. 1 Load Balancer

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API ELB Stitch Core Request Processing Atlas Stitch Metadata 2 Services Stitch requests are processed by a set of multi-tenant Go servers. Each request is run within a goroutine. All JavaScript is run by Otto. 2 Request Processor Stitch Architecture (Single Region)

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API ELB Stitch Core Request Processing Atlas Stitch Metadata 3 Services During the request Stitch coordinates with a metadata instance used for: application definition, authentication, end-user information, and logs. 3 Stitch Metadata Stitch Architecture (Single Region)

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API ELB Stitch Core Request Processing Atlas Stitch Metadata 4 Services When Stitch works with Atlas it keeps connections alive and pools whenever possible. Other service interactions are done over standard HTTPS. 4 Service Coordination Stitch Architecture (Single Region)

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Stitch Architecture (Multi-region) 5 To distribute: Stitch deploys request processing across major regions; keeps data in sync with an Atlas Global Cluster; and routes requests via a global load balancer. 5 Distributing Stitch

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5 To distribute: Stitch deploys request processing across major regions; keeps data in sync with an Atlas Global Cluster; and routes requests via a global load balancer. 5 Distributing Stitch Stitch Architecture (Multi-region)

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ELB 5 Stitch Architecture (Multi-region) To distribute: Stitch deploys request processing across major regions; keeps data in sync with an Atlas Global Cluster; and routes requests via a global load balancer. 5 Distributing Stitch

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Stitch Architecture (Multi-region) ELB In Global application, Stitch matches region on authentication so end-users process nearly all requests on the closest region. 6 Global Applications 6

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How does Stitch compare to other Serverless providers? @JoeKarlsson1

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Agenda ▪ Quick MongoDB overview ▪ Intro to Serverless ▪ Guided Serverless tutorial with Stitch @JoeKarlsson1

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React Journal Serverless Demo @JoeKarlsson1

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@JoeKarlsson1

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App Architecture @JoeKarlsson1 Stitch MongoDB Atlas Journal.entries Trigger onSharedItems Function notifyUsersOfShare Services Amazon SES React Journal App Amazon SES

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First, we need to setup an Atlas MongoDB Cluster @JoeKarlsson1

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Connect our app to Atlas with the MongoDB Stitch Browser SDK @JoeKarlsson1

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Authentication is Mandatory! @JoeKarlsson1 Providers ▪ Simple Login API ▪ Pluggable Authentication Providers ▪ Email/Password ▪ OAuth (Facebook/Google)  ▪ Custom Authentication using JSON Web Token(JWT)  ▪ Multiple Providers per App

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@JoeKarlsson1 ▪ Familiar query language. ▪ find, insert, update, aggregate  ▪ Database access from client code (front-end)  ▪ User level database access control. QueryAnywhere

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Stitch Services @JoeKarlsson1 * Includes more than 20 services

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We need to create a Stitch Service to enable our function to send emails to a recipient using AWS SES @JoeKarlsson1

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@JoeKarlsson1 Functions

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@JoeKarlsson1 ▪ Fire in Response to Data Changes  ▪ Built on MongoDB Change Streams  ▪ Pass Change Events to Functions  ▪ Use Multiple Triggers per Collection Triggers

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Stitch Logs @JoeKarlsson1 Useful for auditing any events in your application Can also be invaluable in root cause analysis for any other issues

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@JoeKarlsson1 Done!

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Future of Serverless @JoeKarlsson1

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FAQ @JoeKarlsson1 ▪ Can I use this for free? ▪ Yes! Stitch provides a free tier: ▪ The first 25 GB of data transfer per month is free. ▪ The minimum of 1,000,000 requests and 100,000 GB-seconds compute per month are free.  ▪ Do I have to use the GUI? ▪ No, There is a CLI available ▪ https://docs.mongodb.com/stitch/deploy/ stitch-cli-reference/  ▪ Do I have to use JS to write serverless functions? ▪ Yes  ▪ How can I get started? ▪ $200 in free credits at: ▪ http://bit.ly/serverlessMN

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@JoeKarlsson1 •Configured our app to connect to Stitch using the Stitch SDK •Enabled a Stitch Authentication Provider •Executed MongoDB commands from the frontend with QueryAnywhere •Create content sharing (ACL) with a couple of rules •Created a service linked to Amazon AWS SES •Created triggers that use functions to send emails

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MongoDB Community • MongoDB University: • university.mongodb.com • MongoDB Community Slack Channel: • https://mongo-db.slack.com/ @JoeKarlsson1

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Additional Resources • http://bit.ly/serverlessMN • $200 in free credits • university.mongodb.com • mongodb.com/cloud/stitch @JoeKarlsson1

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@JoeKarlsson1 Thank you!

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{ name: “Joe Karlsson”, company: “MongoDB”, title: [ “Developer Advocate”, “Software Engineer” ], twitter: “@JoeKarlsson1”, website: “joekarlsson.com”, }