Serverless Rust: Your Low-Risk Entry Point to Rust in Production (and the benefits are huge)

Ready to ignite your enterprise with Rust, but struggling to justify the investment? Performance isn't enough. Instead of massive rewrites, what if you could start small with a low-risk path to production? This talk shows you how. Discover the power of Rust & serverless as a fast, safe, and sustainable entry point, delivering significant short & long-term benefits. Walk away armed with compelling arguments to persuade your leadership and hands-on code samples to begin your Serverless Rust journey today.

Transcript

1. jameseastham.co.uk loige.co Serverless Rust: Your Low-Risk Entry Point to Rust in Production James Eastham (he/him) Talking Serverless Datadog Luciano Mammino (he/him) Senior Architect Four Theorem
5. ÒYou CAN have it all. You just canÕt have it all at once. Oprah Winfrey
7. James Eastham Serverless Advocate
8. Plant Based Pizza
11. ÒSomething, something, trade- offsÉÓ
12. ÒIt DependsÉÓ
16. Make it safe
17. Application Infrastructure
20. Infrastructure
21. Serverless What does it even mean?
22. ÒServerless is a spectrum, not a binary decision. James Eastham
23. Operational Overhead Less More Infrastructure Flexibility
24. Technology Cost Human Cost
25. AWS Lambda Azure Functions GCP Cloud Run AWS Fargate ECS Azure Container Apps EKS AKS GKE EC2 Azure VM Compute Engine Cloudflare Workers
26. ÒIf you think Ôserverless firstÕ you aim to reduce your operational overhead as much as possible James Eastham
28. AWS Lambda AWS Fargate ECS EKS EC2
29. AWS Lambda AWS Fargate ECS EKS EC2
30. AWS Lambda AWS Fargate ECS EKS EC2
31. AWS Lambda AWS Fargate ECS EKS EC2
32. AWS Fargate ECS
33. Blog
40. What about sustainability?
44. AWS Lambda
47. Your Application
48. Your Application
49. How Lambda Works?
50. Create Execution Environment Download Code Initialise Runtime & Code Handle Request Initialisation Invoke
51. 1 2 3
52. Caller Sync Invoke
53. Lambda poller Internal Queue Caller Async Invoke
54. Lambda poller Poll Invoke
65. Requests per month
66. ÒOk James. I’m convinced! How do I get started? All of you In the audience
67. Luciano Mammino Senior Cloud Architect
68. How does a Lambda function execute Rust code?
72. The magic of Custom Runtimes!
73. The magic of Custom Runtimes!
74. The magic of Custom Runtimes! Runtime Handler (logic) Runtime API Poll for events Event (JSON) Execute (event) Response or Error Response or Error (JSON)
77. Load the handler code
78. Infinite loop
82. LetÕs now write this in Rust!
83. Just kiddingÉ AWS has already done that! 😜
84. 📝 Our first Lambda function in Rust - Create a new project - Install the lambda runtime - Write init code - Write handler code - deserialise event - add the biz logic - serialise response - Build it (Amazon Linux x86/arm64) - Zip it - Ship it
85. A (much) better way: Cargo Lambda
86. Our first HTTP Lambda
87. Our first HTTP Lambda
88. Our first HTTP Lambda
89. Our first HTTP Lambda
90. Our first HTTP Lambda
91. Our first HTTP Lambda
92. Our first HTTP Lambda
93. Our first HTTP Lambda
94. Our first HTTP Lambda
95. Our first HTTP Lambda
96. Our first HTTP Lambda
97. Local testing
98. Local testing Full list of example events: loige.link/rust-lambda-events
99. Our first HTTP Lambda
100. Our first HTTP Lambda
101. Our first HTTP Lambda
102. Local testing
103. Local testing
104. Building and shipping 🚢
105. Building and shipping 🚢
106. Building and shipping 🚢
107. Building and shipping 🚢
108. Building and shipping 🚢
109. Building and shipping 🚢
110. HTTP É Great! But what about consuming from Kafka?
111. You know the drillÉ
112. You know the drillÉ
113. You know the drillÉ
114. You know the drillÉ
115. Our first HTTP Lambda
116. Our first HTTP Lambda
117. Our first HTTP Lambda
118. Our first HTTP Lambda
119. Our first HTTP Lambda
120. Our first HTTP Lambda
123. Cargo Lambda supports tons of AWS events
124. Éand you can have your custom ones too!
125. Éand you can have your custom ones too!
126. Éand you can have your custom ones too!
127. Cargo Lambda is cool! But I want to use Terraform CDK SAM Something else!
128. And you should! 😉 Cargo Lambda is fantastic for: - Scaffolding - Local Testing - Compiling (and cross-compiling!) But for deploying your Lambda Functions (with the rest of your infrastructure) You MUST use a proper IaC tool! Check out the Docs to learn how: loige.link/cargo-lambda-iac
129. A case study! A Lambda Authorizer in Rust! Authenticated Request Your backend Custom Authorizer Lambda API Gateway
130. A case study! A Lambda Authorizer in Rust! - The original version was written in Python - Since it was one of the most invoked functions we rewrote it in Rust - The change lead to: - 30% less cold starts - 90% decrease Init time - 60% decrease Execution time - 70% less memory - 50% cost reduction
131. A case study! A Lambda Authorizer in Rust! - This project is now open-source: github.com/lmammino/oidc-authorizer - And the benchmarks are available too!
132. Summary - Rust and Serverless is a perfect combo! - It gives you - Great performance - Safety - Cost reduction - Environmentally friendly applications - Serverless applications are small: Minimum risk / investment - If you are on AWS: use Cargo Lambda - Now go build your next Serverless app, with Rust!
133. jameseastham.co.uk loige.co We are writing a book! rust-lambda.com