Sync deployment references for the runtime state relocation
shipped via ckn-bw (commit 6fae2fd). /opt/left4me/ is now a
root-owned deploy-artifact root (just src/); .venv and steamcmd
live at /var/lib/left4me/{.venv,steam}.
Touches:
- deploy/files/.../left4me-web.service: PATH + ExecStart
- deploy/files/.../left4me-workshop-refresh.service: WorkingDirectory
(was /opt/left4me, now /opt/left4me/src to match the web unit),
PATH, ExecStart
- scripts/sbin/left4me wrapper: flask path
- deploy/tests/test_example_units.py: PATH + ExecStart assertions
for the web unit; also fix a pre-existing broken assertion that
read "Environment=PATH=..." (the unit has Environment=HOME=...
PATH=... on one line, so "Environment=PATH=" was never present)
- now reads just "PATH=..."
- deploy/README.md: paths
- l4d2host/tests/test_cli.py: LEFT4ME_STEAMCMD fixture path
Design + as-shipped record:
docs/superpowers/specs/2026-05-15-runtime-state-relocation-design.md.
The original (narrower) prereq spec at
docs/superpowers/specs/2026-05-15-handoff-noneditable-install.md
is marked superseded with a pointer to what shipped + why the
scope grew (setuptools writes egg-info to source during PEP 517
build prep).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The hardening refactor that just landed closes the same-uid attack
surface (FS view, ptrace, /proc visibility, signals) for the web +
gameserver units via systemd directives plus system-wide
kernel.yama.ptrace_scope=2. Keeping the script-sandbox on a separate
uid was the inconsistent half-step — defense-in-depth only, with
build-time-idmap complexity attached. One principle wins: harden
once, share the uid.
scripts/libexec/left4me-script-sandbox: drop the idmap block (uid
lookups, STAGING setup, cleanup_staging trap, mount --bind
--map-users), switch User=/Group= to left4me, point BindPaths at
\$OVERLAY_DIR directly. Header comment updated to reflect
hardening-not-uid as the same-uid defense. nsenter self-wrap kept —
it's about mount-namespace escape, not uid.
Tests + comments + companion docs updated. Build-time-idmap and
overlay-idmap plans marked SUPERSEDED; user-uid-split spec revised
to "1 user is correct"; one-line update notes on the hardening
specs and the build-overlay-unit-design.
Companion ckn-bw commit removes the l4d2-sandbox user + group and
tightens /var/lib/left4me from 0711 → 0755 (the traverse-only mode
was specifically for the sandbox uid).
Pulls the 5 privileged helpers out of deploy/files/usr/local/{libexec,sbin}/
into top-level scripts/{libexec,sbin}/. They are application-inherent code
(invoked at runtime via sudo from l4d2host/l4d2web), not deploy artifacts —
the previous nesting under deploy/files/ confused source-of-truth with
install-target FHS layout.
deploy/ now means "reference exemplar": README explaining the target
layout, plus example sudoers / sysctl / sandbox-resolv.conf / env
templates / curated systemd units (the ones ckn-bw's reactor emits).
Anyone building a fresh deployment (other than ckn-bw) reads this tree.
Dead static artifacts deleted: left4me-apply-cake helper, left4me-cake
+ left4me-nft-mark service units, cake.env, left4me-mark.nft, and the
superseded deploy-test-server.sh installer.
Tests split to match the new shape:
- scripts/tests/{test_overlay,test_script_sandbox,test_systemctl_helper,
test_journalctl_helper,test_helpers_use_fixed_paths,test_sudoers_grants}.py
with shared fixtures in conftest.py
- deploy/tests/test_example_units.py (renamed from test_deploy_artifacts.py)
— slimmed to lock down the curated example units, sysctl, env templates
l4d2host/tests/test_overlay_helper.py: helper-source path updated to
scripts/libexec/left4me-overlay (was building the path segment-by-segment
under deploy/files/, missed by the path-prefix grep during pre-flight).
Runtime install-target paths (/usr/local/{libexec,sbin}/) unchanged, so
l4d2host/service_control.py, l4d2web/services/overlay_builders.py, the
sudoers grants, and the systemd units all keep their existing path
references.
Requires the matching ckn-bw change to bundles/left4me/items.py
(install_left4me_scripts repointed from /opt/left4me/src/deploy/files/...
to /opt/left4me/src/scripts/...). Left4me lands first so a fresh
git_deploy exposes the new source path before the bundle apply runs.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
ckn-bw was shipping the admin CLI wrapper (sudo left4me <flask
subcommand>) verbatim from its own bundle copy. Move ownership of the
file into left4me so ckn-bw's upcoming install-action approach can
deploy it from deploy/files/usr/local/sbin/left4me on the deployed
git checkout, eliminating the cross-repo duplication that masked the
idmap helper update earlier.
Also re-frame deploy/README.md: deploy/files/, deploy/templates/, and
deploy/tests/ are now genuinely canonical (read by ckn-bw via
git_deploy). Only deploy-test-server.sh remains a superseded artifact.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Spell out that the deploy step for changes to verbatim-shipped files
(privileged helpers, sudoers, sysctl, …) is just re-syncing the bundle's
copy + bw apply. Removes ambiguity for the idmap helper change and any
future edit within the same set.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
ovh.left4me is now provisioned by the ckn-bw bundle bundles/left4me/
(attached via groups/applications/left4me.py); run `bw apply
ovh.left4me` from there.
Keep this directory verbatim as deployment-knowledge reference: what
was configured, what each unit/helper does, why the privileged
boundaries are drawn the way they are. Add a top-of-README
correspondence table marking which files migrated 1:1 vs. which are
obsolete in the new architecture (CAKE moved to systemd-networkd;
nft marking moved into the central nftables bundle; systemd units
are emitted by a metadata reactor; CPU isolation drop-ins are no
longer managed declaratively).
The deploy-test-server.sh stays here too — useful as a concrete walk-
through of the install steps the bundle now performs declaratively.
Just don't run it against an ovh.left4me node managed by ckn-bw; the
two would fight over file ownership, sudoers, and unit definitions.
Explains the core-0-vs-game-cores split, the LEFT4ME_SYSTEM_CPUS /
LEFT4ME_GAME_CPUS overrides, the single-core skip, and the
subset-of relationship with per-instance CPUAffinity=.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- RT example: add AmbientCapabilities=CAP_SYS_NICE so the User=left4me
service can actually enter SCHED_FIFO on Trixie.
- CPU governor: note that linux-cpupower may need apt install.
- CPUAffinity=2: clarify that per-instance values typically increment.
- NIC tuning: note that ethtool may need apt install.
Documents CPU governor, per-instance CPUAffinity, NIC tuning, and
SCHED_FIFO opt-in patterns. None of these are auto-applied; they're
ops-side knobs for measured problems the perf baseline doesn't solve.
deploy/README.md still described the deleted managed-global overlays as
the second overlay surface. Replace with a description of script
overlays (bubblewrap + systemd-run sandbox, resource caps).
Full test sweep: 367 passing, 2 skipped across l4d2web, l4d2host, deploy.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
deploy-test-server.sh: provisions the l4d2-sandbox system user (no home,
nologin shell) and installs the bubblewrap apt/dnf package; copies the
left4me-script-sandbox helper into /usr/local/libexec/left4me with mode
0755. Drops the global_overlay_cache directory provisioning, the
refresh-global-overlays unit installation, and the timer enable.
Deletes the orphaned left4me-refresh-global-overlays.{service,timer}
files. Trims the matching paragraph from deploy/README.md.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Drop MountFlags=shared (the assumption that it propagated fuse mounts
to host was incorrect on systemd 257 with ProtectSystem+ReadWritePaths).
Restore PrivateTmp=true (was dropped in 593611e for fuse propagation
that did not work). Rewrite the comment block to describe the new
model: mounts go through the left4me-overlay helper which nsenters
into PID 1's mount namespace, so the unit's mount-ns layout is no
longer load-bearing.
Update the three user-facing READMEs (root, l4d2host, deploy) to drop
fuse-overlayfs / fusermount3 prereqs and call out the kernel overlayfs
mount path through the privileged helper.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The workshop + managed-global overlay surface fully covers the
admin-SFTP flow that 'external' was a placeholder for. Drop the type
from the model defaults, builder registry, routes, template, and
tests, and add migration 0004 that deletes any leftover external
rows along with their blueprint and job references.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds two managed system overlays (l4d2center-maps, cedapug-maps) that
fetch curated map archives from upstream sources and reconcile addons
symlinks for non-Steam maps. A daily systemd timer enqueues a coalesced
refresh_global_overlays worker job; downloads, extraction, and rebuilds
run in the existing job worker and surface in the job log UI.
Schema: GlobalOverlaySource / GlobalOverlayItem / GlobalOverlayItemFile
plus nullable Job.user_id so system jobs render as "system" in the UI.
The new builder reconciles symlinks against the per-source vpk cache
and leaves foreign symlinks untouched. Initialize-time guard refuses
to mount a partial overlay if any expected vpk is missing from cache.
Refresh service uses shutil.move to handle EXDEV when /tmp and the
cache live on different filesystems.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Adds /var/lib/left4me/workshop_cache to the deploy mkdir list (owned by
the left4me runtime user). Updates deploy/README.md to document the new
directory and the workshop overlay layout: web app downloads VPKs into
the cache and symlinks them into overlays/{overlay_id}/left4dead2/addons/.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
