News, tutorials, and insights from the LocalStack team on cloud emulation, product showcases, and local development practices.https://blog.localstack.cloud/https://blog.localstack.cloud/testing-s3-replication-jobs-locally-with-localstack/https://blog.localstack.cloud/testing-s3-replication-jobs-locally-with-localstack/Learn how to test Amazon S3 replication with LocalStack by configuring a cross-Region replication rule, catching an under-privileged replication role with IAM enforcement before it ships, and validating the whole flow, end-to-end on our local machine.Tue, 21 Jul 2026 00:00:00 GMThttps://blog.localstack.cloud/build-and-test-aws-lambda-extensions-locally-with-localstack/https://blog.localstack.cloud/build-and-test-aws-lambda-extensions-locally-with-localstack/Learn how to build a custom AWS Lambda extension using the Extensions API. This tutorial walks through creating an audit-log extension that tracks every invocation and writes a report to S3, deployed and tested locally on LocalStack.Thu, 04 Jun 2026 00:00:00 GMThttps://blog.localstack.cloud/terraform-and-aws-cli-on-localstack/https://blog.localstack.cloud/terraform-and-aws-cli-on-localstack/AWS offers multiple ways to create and manage cloud resources. Two popular tools are the AWS CLI (Command Line Interface) and Terraform, each with its own strengths and trade-offs. Let’s explore the process of creating resources using both AWS CLI and Terraform, and dive into the key differences between these approaches.Mon, 21 Oct 2024 00:00:00 GMThttps://blog.localstack.cloud/aws-for-frontend-devs/https://blog.localstack.cloud/aws-for-frontend-devs/Getting started with AWS can seem overwhelming. This guide aims to give anyone building web applications the overview to understand the building blocks of a web application running in AWS including S3, CloudFront, Lambda, API Gateway and DynamoDB.Wed, 25 Sep 2024 00:00:00 GMThttps://blog.localstack.cloud/2024-04-08-exploring-s3-mocking-tools-a-comparative-analysis-of-s3mock-minio-and-localstack/https://blog.localstack.cloud/2024-04-08-exploring-s3-mocking-tools-a-comparative-analysis-of-s3mock-minio-and-localstack/In this blog post, we conduct a comparison of S3Mock, MinIO, and LocalStack for local development and testing. We evaluate how these tools stack up in terms of API parity with AWS S3 standards, aiming to identify the optimal choice for local S3 development & testing.Mon, 08 Apr 2024 00:00:00 GMT