Implement multi-layer OCI support with daemon integration#24
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Add support for multi-layer OCI images to enable base runtime images that can be composed with application WASM modules. This allows language runtimes (Python, Ruby, etc.) to be distributed as reusable base layers. Core changes: - Add RUNTIME_LAYER_MEDIA_TYPE for base image layers - Extend FabricksModule to handle multiple layers with composition - Add wac-graph dependency for WASM component composition - Implement multi-layer manifest support in LocalStorage - Update registry client pull/push for multi-layer images - Enhance build command to support base images via [from].image - Add entrypoint and version fields to Fabrickfile schema New examples: - examples/test-runtime/ - minimal test runtime for validation - examples/python-hello/ - Python example demonstrating runtime usage Additional improvements: - Fix clippy warnings in fabricksd policy and networking modules
Implement a language-specific builder system that enables users to write Python HTTP services without any WASM toolchain knowledge. Simply specify source = "python" in the Fabrickfile and run fabricks build. Builder System: - Builder trait and registry for extensible language support - Rust builder using cargo-component - Python builder using componentize-py with embedded WASI HTTP framework - Automatic builder selection based on [from].source field Python Runtime: - Reference implementation with WASI HTTP handler interface - Embedded framework in examples/runtimes/python - WIT definitions for HTTP request/response handling - CPython interpreter bundled into WASM component User Experience: - Write simple Python handler functions - Zero WASM knowledge required - Single command build: fabricks build - Example updated with improved documentation Requirements: - componentize-py installed via pip - Python 3.10+
- Add run_module endpoint to daemon for loading modules by tag - Handle interpreted runtimes (Python) by extracting source layers - Mount source files at /app via WASI preopens - Enforce network security (internal by default, explicit external) - Update Python runtime and example documentation with daemon workflow - Add flate2 and tar dependencies for source layer extraction - Add OCI storage to daemon's AppState for module loading - Update .gitignore for Python runtime build artifacts All execution now goes through the daemon to ensure proper security boundaries and capability enforcement.
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Summary
/appKey Changes
OCI Support:
FabricksModuleto support multiple layersDaemon Integration:
run_moduleendpoint to load modules by tag from OCI storage/appvia WASI preopensNetwork Security:
fabricks network create,fabricks network joinTest Plan
fabricks build examples/runtimes/python --tag fabricks.dev/runtimes/python:3.12fabricks build examples/python-hellofabricks run python-hello:1.0.0fabricks network create publicfabricks network join public python-hellocurl http://localhost:8088/Closes #20