Simply Serverless

Is your team using lambdas? Do you hear your backend developers talking about serverless applications? Curious to learn more? If so, this talk is for you. Effective serverless architectures require less backend code, less complexity, less risk, and less tech debt. But how is that possible? This talk aims to answer that question for you.

We'll cover:
* What is serverless
* When might you use it, and
* How can you develop a serverless app with Kotlin

Serverless application design is becoming more and more prevalent. Now is the time to understand this powerful shift in backend development, simply.

Transcript

1. Simply Serverless Annyce Davis - @brwngrldev
2. @brwngrldev
3. Lambda @brwngrldev
4. Lambda @brwngrldev
5. Lambda @brwngrldev • Launched by AWS in 2014
6. Lambda @brwngrldev • Launched by AWS in 2014 • Function as a Service (FaaS)
7. Lambda @brwngrldev • Launched by AWS in 2014 • Function as a Service (FaaS) • Typically event-driven (15 mins)
8. Lambda @brwngrldev • Launched by AWS in 2014 • Function as a Service (FaaS) • Typically event-driven (15 mins) • Multi-language support
9. 1,430 @brwngrldev
10. Serverless @brwngrldev
11. Serverless @brwngrldev
12. Services @brwngrldev Area Type
13. Services @brwngrldev Area Type Compute Functions (Lambda)
14. Services @brwngrldev Area Type Compute Functions (Lambda) Storage Files, data (S3, DynamoDB)
15. Services @brwngrldev Area Type Compute Functions (Lambda) Storage Files, data (S3, DynamoDB) Streaming Messages, queues (SNS, SQS)
16. Services @brwngrldev Area Type Compute Functions (Lambda) Storage Files, data (S3, DynamoDB) Streaming Messages, queues (SNS, SQS) Querying ETL, SQL, ML (Rekognition)
17. Serverless @brwngrldev
18. Serverless @brwngrldev Code runs on air
19. Serverless @brwngrldev Code runs on air
20. Serverless @brwngrldev Code runs on air No servers to manage
21. Code runs on air Serverless @brwngrldev Pay for what you use No servers to manage
22. Code runs on air Serverless @brwngrldev Scalability provided by vendor Pay for what you use No servers to manage
23. Landscape @brwngrldev On-premise Cloud native
24. Landscape @brwngrldev On-premise Cloud native
25. @brwngrldev
26. Players @brwngrldev
27. @brwngrldev
28. Pros @brwngrldev
29. Pros @brwngrldev • Faster time-to-market
30. Pros @brwngrldev • Faster time-to-market • Cost savings
31. Pros @brwngrldev • Faster time-to-market • Cost savings • Simplified scalability
32. Pros @brwngrldev • Faster time-to-market • Cost savings • Simplified scalability • No specialized DevOps
33. Pros @brwngrldev • Faster time-to-market • Cost savings • Simplified scalability • No specialized DevOps Cons
34. Pros @brwngrldev • Faster time-to-market • Cost savings • Simplified scalability • No specialized DevOps Cons • Ecosystem immature
35. Pros @brwngrldev • Faster time-to-market • Cost savings • Simplified scalability • No specialized DevOps Cons • Ecosystem immature • Vendor lock-in
36. Pros @brwngrldev • Faster time-to-market • Cost savings • Simplified scalability • No specialized DevOps Cons • Ecosystem immature • Vendor lock-in • Multiple moving pieces
37. Pros @brwngrldev • Faster time-to-market • Cost savings • Simplified scalability • No specialized DevOps Cons • Ecosystem immature • Vendor lock-in • Multiple moving pieces • Learning curve
38. ServerLess @brwngrldev
39. “Less” @brwngrldev
40. “Less” @brwngrldev • Backend code
41. “Less” @brwngrldev • Backend code • Complexity
42. “Less” @brwngrldev • Backend code • Complexity • Risk
43. “Less” @brwngrldev • Backend code • Complexity • Risk • Tech debt
44. Getting Started @brwngrldev
45. @brwngrldev
46. @brwngrldev
47. Demo @brwngrldev
52. @brwngrldev
53. @brwngrldev http://serverlesscalc.com
54. @brwngrldev
55. @brwngrldev Deploy Terraform
56. resource "aws_api_gateway_method" "index_html" { depends_on = ["aws_api_gateway_resource.index_html"] rest_api_id = "${aws_api_gateway_rest_api.ufo_sightings.id}" resource_id = "${aws_api_gateway_resource.index_html.id}" http_method = "GET" authorization = "NONE" } resource "aws_api_gateway_resource" "graphql" { depends_on = ["aws_api_gateway_rest_api.ufo_sightings"] rest_api_id = "${aws_api_gateway_rest_api.ufo_sightings.id}" parent_id = "${aws_api_gateway_rest_api.ufo_sightings.root_resource_id}" path_part = "graphql" } resource "aws_cloudwatch_event_rule" "autowarm_merged_0" { name = "autowarm-merged-0" schedule_expression = "cron(0/5 * * * ? *)" } @brwngrldev Deploy Terraform
57. @brwngrldev Deploy Terraform AWS CloudFormation Cloud Deployment Manager
58. @brwngrldev
59. @brwngrldev
60. Serverless with Kotlin @brwngrldev
61. @brwngrldev
62. @brwngrldev Ktor Koin Kotless
63. @brwngrldev Ktor Application
64. @brwngrldev Ktor Application Feature Feature
65. @brwngrldev Ktor Application Feature Feature Routes
66. @brwngrldev get("/") { } post("/graphql") { } Ktor
67. @brwngrldev get("/") { call.respondRedirect("index.html") } post("/graphql") { } Ktor
68. @brwngrldev get("/") { call.respondRedirect("index.html") } post("/graphql") { val request = call.receive<GraphQLRequest>() … call.respondText(result) } Ktor
69. @brwngrldev Koin val mainModule = module { single { Gson() } single { AppSchema(get()) } single { UFOSightingDatabase() } }
70. @brwngrldev Koin val mainModule = module { single { Gson() } single { AppSchema(get()) } single { UFOSightingDatabase() } } val appSchema: AppSchema by inject() val gson: Gson by inject()
71. @brwngrldev Kotless
72. @brwngrldev Kotless 1. Downloads Terraform
73. @brwngrldev Kotless 1. Downloads Terraform 2. Generates deployment code
74. @brwngrldev Kotless 1. Downloads Terraform 2. Generates deployment code 3. Packs the lambda
75. @brwngrldev Kotless 1. Downloads Terraform 2. Generates deployment code 3. Packs the lambda 4. Deploys the app to AWS
76. @brwngrldev Ktor & Kotless class UFOSightingsApp : Kotless() { override fun prepare(app: Application) { with(app) { main() routes() } } }
77. @brwngrldev kotless { config { } webapp { } }
78. @brwngrldev kotless { config { bucket = "ktor-kotless-ufo.s3.adavis.info" dsl { type = DSLType.Ktor } terraform { profile = "default" region = "us-east-1" } } webapp { } }
79. @brwngrldev kotless { config { bucket = "ktor-kotless-ufo.s3.adavis.info" dsl { type = DSLType.Ktor } terraform { profile = "default" region = "us-east-1" } } webapp { route53 = Route53("api", "ktor-kotless-ufo.info") } }
80. @brwngrldev ./gradlew deploy
81. @brwngrldev
82. @brwngrldev
83. @brwngrldev
84. @brwngrldev
85. Demo @brwngrldev
86. https://github.com/adavis/ufo-sightings-api/tree/kotless @brwngrldev
87. @brwngrldev
88. References @brwngrldev • Serverless Architectures (https://martinfowler.com/articles/serverless.html) • Kotless - Kotlin Serverless Framework (https://www.youtube.com/watch?v=69uk3Pi88AE) • AWS Serverless Resources (https://aws.amazon.com/serverless/resources) • 5 principles for cloud-native architecture (https://cloud.google.com/blog/products/application- development/5-principles-for-cloud-native-architecture-what-it-is-and-how-to-master-it) • GCP Solution Architectures (https://docs.google.com/presentation/d/ 1vjm5YdmOH5LrubFhHf1vlqW2O9Z2UqdWA8biN3e8K5U/edit#slide=id.p85)