A Rust runtime and libraries for building and deploying AWS Lambda functions.
AWS Lambda Rust Runtime is an official toolkit for writing and deploying AWS Lambda functions in the Rust programming language. It provides a runtime client that interfaces with AWS Lambda's execution environment and a suite of libraries for processing events, handling HTTP requests, building extensions, and managing errors. It solves the problem of bringing Rust's performance, memory safety, and concurrency features to the serverless ecosystem.
Rust developers who want to build serverless functions on AWS Lambda, and teams looking to leverage Rust's performance and safety for event-driven, scalable cloud applications.
Developers choose this runtime because it's the officially supported way to run Rust on AWS Lambda, offering robust libraries for all Lambda event types, seamless integration with AWS services, and the performance benefits of a compiled language in a serverless context.
A Rust runtime for AWS Lambda
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As an AWS-authored project, it integrates seamlessly with Lambda services, following AWS best practices and ensuring long-term compatibility.
The aws_lambda_events crate provides structs for all AWS event types, enabling compile-time safety and reducing runtime parsing errors.
Built-in support for error crates like anyhow and thiserror, with features to customize Diagnostic types for better Lambda error logging.
Seamlessly works with the tracing ecosystem for structured logging, automatically configured for AWS CloudWatch and advanced logging controls.
The lambda-extension library allows building custom Lambda Runtime Extensions in Rust, useful for monitoring, security, or custom initialization.
Building for different Lambda architectures (e.g., arm64) requires specific toolchains and commands, adding steps to the deployment process compared to interpreted languages.
The runtime is tightly coupled with AWS Lambda, making it difficult to port functions to other cloud providers without significant code changes.
The spawn_graceful_shutdown_handler helper is limited to Unix systems and has fixed behaviors, requiring custom implementation for fine-tuned control or Windows support.