This article provides a comprehensive guide for migrating AWS Lambda Go functions from the deprecated go1.x runtime to the provided.al2 runtime on Amazon Linux 2.

• go1.x runtime is being deprecated alongside Amazon Linux 1 end-of-life
• provided.al2 runtime supports AWS Graviton2 processors for 34% better price-performance
• Simpler single-process architecture eliminates RPC overhead for faster invokes
• Compile Go binaries for Linux with executable named "bootstrap"
• Add lambda.norpc build tag to reduce binary size and cold start time
• Update build scripts, CloudFormation, SAM, and CDK configurations for new runtime
• Handler value can be set to any value but "bootstrap" is recommended
• Container image users must migrate from go1.x base image to provided.al2 base image
• Migration requires no code changes, only build and deployment configuration updates

The migration enables better performance and cost efficiency while aligning Go with other compiled languages on Lambda.