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mwiegand 7a25c2453c
fix(left4me-script-sandbox): self-wrap into PID 1's mount namespace 
The web service runs with PrivateTmp=true, which puts it in its own
mount namespace. Worker invokes the sandbox helper via sudo from there;
the helper's pre-systemd-run `mount --bind --map-users=...` lands in
the web service's namespace. systemd-run then spawns transient units
in PID 1's namespace where the bind is invisible — the BindPaths lookup
finds an empty staging dir owned by root, and the sandbox uid hits
permission-denied on every write.

Mirror the pattern from left4me-overlay's ExecStartPre wrapper: enter
PID 1's mount namespace at the start of the helper via `nsenter
--mount=/proc/1/ns/mnt`. Sentinel env var avoids exec recursion. The
gameserver helper handles this at the unit level; the script helper
doesn't have a unit so we self-wrap.

Diagnosis: 5 failed builds all hit the same EACCES on the first
`mkdir`/`tar mkdir`. Direct SSH-sudo invocations of the same helper
succeeded because SSH-sudo doesn't inherit a private namespace; only
the worker-invoked path is affected.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-15 01:33:13 +02:00
deploy fix(left4me-script-sandbox): self-wrap into PID 1's mount namespace 2026-05-15 01:33:13 +02:00
docs/superpowers plan(left4me): move idmap from gameserver mount to script-sandbox build 2026-05-15 01:15:46 +02:00
examples/script-overlays feat(l4d2-web): seed example script overlays from examples/script-overlays/ 2026-05-08 18:41:08 +02:00
l4d2host refactor(left4me-overlay): move uid translation to script-sandbox build 2026-05-15 01:20:39 +02:00
l4d2web harden(l4d2web): per-username login rate limit alongside per-IP 2026-05-14 22:26:20 +02:00
.envrc chore: add direnv .envrc for local Python 3.13 venv 2026-05-08 18:56:51 +02:00
.gitignore chore: add dev.db and opencode.json to gitignore 2026-05-13 14:29:57 +02:00
AGENTS.md Revert "AGENTS: harden the spec+plan commit rule" 2026-05-11 22:26:47 +02:00
README.md chore: add direnv .envrc for local Python 3.13 venv 2026-05-08 18:56:51 +02:00

README.md

left4me

left4me is a local L4D2 server management platform with two planned components:

  1. l4d2host + l4d2ctl (host library + CLI)
  2. l4d2-web-app (Flask web app for users, blueprints, servers, jobs, and logs)

Status

Implementation plans remain the source of truth for architecture and task sequencing:

  • docs/superpowers/plans/2026-04-22-l4d2-host-lib-v1.md
  • docs/superpowers/plans/2026-04-23-l4d2-web-app-v1.md

Locked v1 Decisions

  • Naming is strictly l4d2 (not l4d).
  • Host library and web app are separate components.
  • Host CLI write commands are fixed to:
    • install
    • initialize <name> -f <spec.yaml>
    • start <name>
    • stop <name>
    • delete <name>
  • Host CLI read commands are available for the web/host boundary:
    • status <name> --json
    • logs <name> --lines <n> --follow/--no-follow
  • The web app calls host operations through l4d2ctl, not direct l4d2host imports.
  • Deployment uses /var/lib/left4me for runtime state, /opt/left4me for repository contents and the virtualenv, /etc/left4me for environment files, and global units under /usr/local/lib/systemd/system.
  • Overlay handling is directory-based; the web app populates each overlay (workshop downloads, managed-global refresh).
  • No lock manager, no rollback, no preflight checks in host library.
  • CLI propagates subprocess failures via stderr and return code.
  • delete on missing instance is no-op success.
  • Blueprint model (web app):
    • user-private in v1
    • servers are live-linked to blueprint
    • no per-server overrides
    • delete blueprint blocked when linked servers exist
    • blueprint changes apply on next action
    • server can reassign blueprint anytime

Planned Repository Layout

  • l4d2host/
  • l4d2web/
  • deploy/
  • docs/superpowers/plans/

Deployment

See deploy/README.md for the Linux test deployment contract, including the runtime user, target filesystem layout, systemd units, privileged helpers, sudoers rules, admin bootstrap, and overlay reference rules.

Local development

This repo uses direnv to auto-activate a Python 3.13 venv on cd (matching the Debian Trixie production target). With direnv installed and hooked into your shell:

  1. direnv allow once per fresh checkout (and after any .envrc change).
  2. cd out and back in — .direnv/python-3.13/ is created and put on PATH.
  3. pip install -e ./l4d2host -e ./l4d2web to install both packages editable.
  4. pip install pytest to run the test suites (pytest tests/ inside either subproject).

Tech Stack (planned)

  • Python 3.12+
  • Typer, PyYAML, pytest
  • Flask, SQLAlchemy, Alembic
  • HTMX (vendored locally), custom CSS, SSE
  • systemd units, kernel overlayfs (mounted via the left4me-overlay privileged helper), steamcmd

Recommended Implementation Order

  1. Implement l4d2host plan first.
  2. Implement l4d2web plan second.
  3. Keep tests green task-by-task (TDD flow from plans).
  4. Keep commits small and aligned with plan tasks.

Contributing Notes

  • Follow plan task order unless explicitly re-planned.
  • Keep contracts above unchanged unless the user asks to change them.
  • Update plan docs when scope or behavior changes.