docker-sync is a file synchronization tool that enables developers to run Docker containers at full performance while maintaining live code synchronization during development on macOS, Windows, and Linux.
The core problem docker-sync addresses is the performance penalty that occurs when mounting host directories into Docker containers on non-Linux systems. Native volume mounts on macOS and Windows are slow because they rely on filesystem bridges that introduce significant latency. docker-sync solves this by maintaining a high-performance copy of your codebase inside the Docker environment and synchronizing changes bidirectionally between your host machine and the container. This approach lets developers edit code on their host system while the application runs at native speeds inside the container, eliminating the choice between development convenience and runtime performance.
Developers should adopt docker-sync if they work on macOS or Windows and need to use Docker for local development without accepting slow file access penalties. It integrates with Docker Compose workflows and works across different Docker installations including Docker for Mac, Docker for Windows, and Docker Toolbox. The tool is particularly suited for projects where file I/O performance directly impacts development iteration speed, such as applications with large codebases or frameworks that perform frequent filesystem operations during development.
The project actively solicits contributions and maintains documented areas where help is needed, both for code improvements and documentation work. Development involves collaboration from multiple contributors who have made substantial improvements to the tool over time. The project maintains official documentation separate from the repository and provides a dedicated homepage resource for users seeking guidance on setup and usage.
