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Starting on March 23, 2026, LocalStack for AWS will consolidate into a single image that requires authentication. Learn more about what’s changing and what this means for your setup in this blog post.

Overview

LocalStack offers configuration options for customizing how services behave, how components interact, and how your local cloud environment is initialized.

This section explains key configuration mechanisms (including environment variables, configuration files, and runtime hooks) along with internal features that let you adapt LocalStack to fit a variety of development and testing scenarios.

The diagram below provides a high-level overview of what’s covered.

Understanding LocalStack configuration