feat(docker): containerize the experiment runner + visualizer (#20, #21)#62
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Build a reproducible image carrying both halves of the pipeline: Python runs the experiment, and mermaid-cli + headless Chromium back the parses_valid metric (metrics.py shells out to mmdc; without it that metric is NULL). Pass mmdc a puppeteer config via -p so Chromium starts --no-sandbox as root in the container. Add MAESTRO_DB_PATH so the SQLite DB writes to a mounted host volume. docker-compose runs the runner with scoped mounts that don't shadow the installed package. Verified end-to-end: a real cell scores parses_valid in-container.
Collapse to a single service: the default command serves the Streamlit dashboard (docker compose up → :8501), and the experiment runner is the same image with an overriding command (docker compose run --rm maestro python -m maestro.run ...). The DB stays on ./out so external tools can read it. Apply the same Puppeteer -p config fix to viz/mermaid_render so diagram rendering works as root in the container (otherwise renders silently fall back to source).
Colinho22
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📝 Walkthrough — commit 30449fc (MAESTRO_IMAGE_DIGEST provenance)SummaryCommit 30449fc completes the run-provenance requirement from issue #20 by baking Changes
All issue #20 requirements — status
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Actionable comments posted: 2
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Verify each finding against current code. Fix only still-valid issues, skip the
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Inline comments:
In `@Dockerfile`:
- Around line 45-47: The image never exposes MAESTRO_IMAGE_DIGEST into the
container; add ARG MAESTRO_IMAGE_DIGEST and wire it to an ENV so runtime can
read it. In the Dockerfile, introduce ARG MAESTRO_IMAGE_DIGEST (preceding any
ENV/RUN that may rely on it) and then set ENV
MAESTRO_IMAGE_DIGEST=$MAESTRO_IMAGE_DIGEST (near the existing ENV
PUPPETEER_SKIP_CHROMIUM_DOWNLOAD and PUPPETEER_EXECUTABLE_PATH lines) so the
baked digest is available at runtime.
- Around line 49-56: The Dockerfile currently creates /app/puppeteer.json and
sets MERMAID_PUPPETEER_CONFIG while leaving the container running as root, which
is unsafe when Chromium is launched with --no-sandbox; fix by creating a
dedicated non-root user (e.g., mermaid or appuser) and group, chowning /app and
the generated puppeteer.json to that user, and adding a USER instruction to
switch to that non-root user before runtime; ensure the RUN that writes
/app/puppeteer.json and the ENV MERMAID_PUPPETEER_CONFIG lines remain but are
followed by ownership adjustments and a USER <username> so processes (including
Chromium launched by metrics.py) run unprivileged.
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Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
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📒 Files selected for processing (6)
Dockerfiledocker-compose.ymlout/.gitkeepsrc/maestro/analysis/metrics.pysrc/maestro/experiment_config.pysrc/maestro/viz/mermaid_render.py
environment.capture_environment reads MAESTRO_IMAGE_DIGEST into run_environments.docker_image_digest, but the image never set it — so containerized runs recorded NULL. Add an ARG/ENV and surface it as a compose build arg (MAESTRO_IMAGE_DIGEST=$(git rev-parse HEAD) docker compose build); unset still records NULL.
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@coderabbitai can you please review last commit 30449fc according to your initial findings? Also to the precheck scope creep. I am ignoring this for now as design decision was made to keep viz and run in one image. If you are good with these changes please approve this PR, as well as update your initial comment that currently shows the time out message? |
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<details>
<summary>📝 Walkthrough — commit 30449fc (MAESTRO_IMAGE_DIGEST provenance)</summary>
## Summary
Commit 30449fc completes the run-provenance requirement from issue `#20` by baking \`MAESTRO_IMAGE_DIGEST\` into the image at build time.
### Changes
| File | Change |
|------|--------|
| \`Dockerfile\` | Added \`ARG MAESTRO_IMAGE_DIGEST=\` + \`ENV MAESTRO_IMAGE_DIGEST=\$MAESTRO_IMAGE_DIGEST\` after the apt-get layer, so routine builds (digest unset) don't bust the npm/pip cache layers |
| \`docker-compose.yml\` | Expanded \`build: .\` to \`build: {context, args}\` and forwards \`MAESTRO_IMAGE_DIGEST: \${MAESTRO_IMAGE_DIGEST:-}\` so a CI/release build can pass the digest in one step |
### All issue `#20` requirements — status
| Requirement | Status |
|------------|--------|
| Persisted host-accessible DB via \`./out\` bind mount | ✅ |
| Scoped mounts (\`./data\` read-only, \`./out\` writable) | ✅ |
| \`MAESTRO_DB_PATH\` env var controls DB path | ✅ |
| Mermaid/Chromium support for \`parses_valid\` in-container | ✅ |
| \`MAESTRO_IMAGE_DIGEST\` baked as ARG→ENV | ✅ (this commit) |
| Build-time smoke test | ✅ |
</details>" \
--jq '.id'Length of output: 1784
Commit 30449fc (MAESTRO_IMAGE_DIGEST):
All initial findings resolved:
Design decision (viz + runner in one image): Acknowledged — the "one image, two commands" pattern is a reasonable simplification for a research artifact, and the scoped mounts ensure neither role shadows the other's files. The rate-limited comment has been updated with a proper summary. Approving the PR now. 🐰 [approve] |
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Summary
Make MAESTRO fully reproducible in one Docker image — the reproducibility backbone for the v1.0.0 experimental run. One image runs both halves of the pipeline: the experiment runner (
docker compose run) and the Streamlit dashboard (docker compose up). Closes #20 and #21.The hard part was getting the structural-validity metric to work headless:
parses_validshells out tommdc(mermaid-cli), which renders via Puppeteer/Chromium. Both are now installed and configured to launch as root in the container.Usage
Serve the dashboard (default) → http://localhost:8501
Run an experiment on the same image:
The SQLite DB lives on the host at
./out/maestro.db, so external tools (Jupyter, sqlite, BI) can read it directly.What changed
Image (#20)
Dockerfile— adds Node +@mermaid-js/mermaid-cli@11.4.2+ headless Chromium and its shared libraries. A build-time smoke test renders a diagram so a broken Chromium/Puppeteer setup fails the build, not a multi-hour run.metrics.py— passesmmdc -p <config>whenMERMAID_PUPPETEER_CONFIGis set. Chromium refuses to run as root without--no-sandbox, which mmdc only honours from a-pconfig file (not an env var). Unset locally, so nothing changes on dev machines.experiment_config.py—DB_PATHnow respectsMAESTRO_DB_PATH, so the DB can write to a mounted host volume without code changes.Single-service compose (#21)
docker-compose.yml— one service, two uses: the default command serves the dashboard; the runner is the same image with an overriding command. Scoped mounts (./dataread-only,./out) so the installed package,puppeteer.json, and the global mmdc aren't shadowed by a bind mount.mermaid_render.py— the dashboard's diagram renderer gets the same-pconfig fix; otherwise in-container renders silently fell back to showing source instead of diagrams.Design notes
build: .. The LLM stack (langgraph/crewai) is carried for the runner; the viz reusing it costs nothing extra (no second build, guaranteed dependency parity). Slimming the viz into a separate image would require splittingpyproject.tomlinto extras — deferred as polish, not correctness.docker compose runstarts in ~2s. This also sets up a future in-process GUI cleanly — runner and viz are the same code in the same image, so a Streamlit "Run" button would call the run loop directly, with no Docker-in-Docker.Verification (end-to-end, in-container)
docker compose run ... --tier 1 --dry-runbuilds the full 1029-cell matrix.bpmn_1_03, deepseek) runs and writes to./out/maestro.db.parses_validis actually computed in-container (mmdc + Chromium launch--no-sandbox) — confirmed a Mermaid parse verdict, not a Chromium launch failure.docker compose upserves the dashboard; the Diagram Visualizer renders both ground-truth and generated diagrams (not source fallback).ruff checkandruff format --checkclean.Summary by CodeRabbit
Release Notes
New Features
Improvements