Files
shopdb-flask/docs/adr/ADR-015-site-specific-configuration.md
cproudlock 4995456136 docs: take one site's name, hosts and paths off the public wiki
The publishability gate caught internal tooling names and developer paths but
nothing site-specific, so roughly sixty leaks reached the wiki: the site name in
ten documents, real fleet hostnames in the collector and GE-Enforce examples, an
internal database name through the whole import guide, imaging-share paths, and
a maintainer's username as the Deciders line of every ADR and inside a generated
curl example.

None of it is a security matter on an air-gapped fleet. It matters because these
pages are read by engineers at other plants, and a document that names one site
throughout reads as that site's notes rather than a product's documentation -
which is exactly what it then gets treated as.

Examples now use neutral hostnames, the site is "the reference site" where the
distinction carries meaning, and ADRs are decided by "ShopDB maintainers". The
gate carries all of these patterns, so the next one fails a build.

Two documents leave docs/ because they were never written for an outside reader.
PROJECT-REVIEW.md is an internal health memo pinned to a commit from July, whose
headline finding (an untracked playbook) has since been fixed - it is history,
and git holds it. PILOT-DEPLOY.md is one site's own cutover runbook, complete
with a "re-measure before publishing" placeholder; it moves next to the loader
it belongs to, in scripts/site_imports/wjf/.

ADR-015 is AMENDED rather than rewritten. Its enforcement section still said
report-only and its backlog still listed hardcodes that are now cleared, which
left the record contradicting itself. The amendment says what changed and why
the report-only period ended; the original text stays, because what the decision
looked like when it was taken is the part worth keeping.

Also corrects llms.txt's response envelope, which had errors at the top level
and pagination at meta.total. Both are nested one deeper, so anything written
against that description read undefined on every error it tried to handle.
2026-08-14 15:38:27 -04:00

7.2 KiB

ADR-015: Where a site's own data is allowed to live

  • Status: ACCEPTED
  • Date: 2026-08-11
  • Deciders: ShopDB maintainers
  • Relates to: ADR-004 (per-site instances, not multi-tenant), ADR-013 (plugin catalog + lean per-site builds), ADR-014 (schema-lean per-site builds)

Context

ShopDB is built as a product several GE Aerospace sites can adopt (ADR-004: each site runs its own instance). It is also developed at one site, West Jefferson, against that site's live fleet. Every feature therefore arrives carrying that site's hostnames, networks, share paths and vocabulary, and the fastest way to ship any of them is to write the value where the code needs it.

That is not a hypothetical drift. A scan of plugins/ and shopdb/ for a site host, a site FQDN or a site network returns 19 hits, of which roughly 8 are a shipped default or a hardcode rather than a comment:

  • plugins/geenforce/seed_display_scope.py baked one site's own ShopDB URL and device.geaerospace.net into an inline PowerShell payload. A sister site could not override either without editing the source. FIXED 2026-08-14: the kiosk base URL now comes from the site_base_url setting at seed time and from HKLM at run time, and the dispatcher refuses rather than guessing when neither is set.
  • plugins/backups/services/registry.py defaults the backup share root to one site's own UNC path.
  • shopdb/core/api/settings.py ships device.geaerospace.net and Printer-{ip}.printer.geaerospace.net as SETTING DEFAULTS, so another site inherits that site's domain silently until someone notices.
  • shopdb/core/models/dashboarddefault.py holds the same domain a second time as a module constant, and plugins/computers/api/routes.py a third time as a literal fallback.

The problem is not that site-specific values exist - they must. It is that the repository already has three good mechanisms for them and no rule about which to use, so each new value lands wherever was convenient. The result reads as drift because it is unmanaged, not because any single choice was wrong.

Nothing here is a security matter: these are internal hostnames on an air-gapped network, and tests/test_docs_publishable.py already gates what reaches the public wiki. This is about whether a sister site can adopt the product without reading our source.

Decision

A site's own data lives in one of three places, in this order of preference.

1. A setting, with a NEUTRAL default. Anything an operator could plausibly change: hostnames, domains, share paths, networks, base URLs, label prefixes. The default that ships must be blank or generic, never one site's value. Blank must be a working state - code reads the setting and degrades sensibly, the way display_fqdn_domain already treats blank as "use the hostname as-is". A site-specific default is the failure mode this ADR exists to stop: it is invisible, it looks deliberate, and it is wrong everywhere except here.

2. A site-namespaced directory. Anything that is genuinely one site's and will never be another's, such as the reference site's import loader at scripts/site_imports/wjf/. Never reached by another site's build.

3. Seed data, not code. Vocabularies and catalogs, loaded by flask seed and editable per site afterwards.

Fleet-wide convention is NOT site-specific. The gea-shopfloor-* imaging types are a GE fleet taxonomy, not one site's data, and they already carry a per-site override through the pctypemap_* settings. They are out of scope here.

Comments and documentation may name a site where it explains WHY - "part markers share a machine number at the reference site" is a fact a maintainer needs. Prefer phrasing the rule generally and the example specifically.

Enforcement

scripts/check-naming-and-style.sh, which already runs in CI, greps plugins/ and shopdb/ for a site host, a site FQDN or a site network, excluding tests and site_imports/.

It shipped in REPORT-ONLY mode, because turning a 19-item backlog into a hard gate on the day it lands blocks every unrelated commit until someone works through it. See the amendment below: it now fails the build.

Consequences

Positive:

  • A sister site can adopt without reading our source for values it must change.
  • The backlog is visible and counted rather than felt.
  • New site-specifics are caught at commit time, in the same place the naming rules are already enforced, so there is nothing new to remember.

Negative:

  • Report-only means the rule is advisory until someone flips it, and an advisory rule can be ignored.
  • A neutral default is more code than a working one: every read needs a blank case, which is a real cost paid at every call site.
  • The pattern list is a denylist and will miss a site value it has not been taught. It catches drift, not everything.

Backlog

CLEARED - see the amendment below. Kept as the record of what the decision was answering:

  • plugins/geenforce/seed_display_scope.py - kiosk base URL, FQDN domain, and the legacy-shortcut sweep pattern
  • plugins/backups/services/registry.py - DEFAULTSHAREROOT
  • shopdb/core/api/settings.py - display_fqdn_domain and the printer hostname pattern defaults
  • shopdb/core/models/dashboarddefault.py - DEFAULT_DISPLAY_FQDN_DOMAIN
  • plugins/computers/api/routes.py - literal fallback duplicating that default

The domain appears three times in three files, which is its own defect: one setting, one default, one read.

Cosmetic mentions in comments and UI placeholder text are acceptable under this ADR and are not part of the backlog, with one exception worth fixing when convenient: the GE-Enforce settings page shows one site's real CIDRs as its placeholder, which every site sees.

Amendment, 2026-08-14

The backlog above is cleared and the scanner now ENFORCES: it fails the build, and SITE_LITERALS_ENFORCE=0 is the escape hatch rather than the default. The report-only period ended for the reason the Consequences section predicted - the hit count did not move for weeks, because a rule that only prints is read as no rule.

Three things changed beyond clearing the list:

  • The scan covers PowerShell, the installer, the seeds, generated JSON and the frontend, case-insensitively, across plugins/, shopdb/, scripts/, deploy/, frontend/src/ and tools/. Its original scope - three file types under two directories - missed every literal that actually reached a second site, because those were all in the client scripts and the installer.
  • A line may declare itself deliberate with a trailing ADR-015-OK: <reason> marker. That is for an organisation-wide default which is right at every site and configurable anyway, such as the corporate device domain. It is not a way to defer work: the marker puts the claim in the diff where a reviewer sees it.
  • Both publication gates - the export scrub and the docs publishability test - carry the site patterns, which neither did. The ADR said this was not a security matter because the values were internal to an air-gapped network; that was true of the fleet and false of the public mirror, which had been carrying a production hostname and a share path.

This amendment is appended rather than edited into the text above, because what the decision looked like when it was taken is the part worth keeping.