026 reopened — the rule is right about data, wrong about facilities

Enforcing "declare what you mount" refuses the builder, which mounts the
container runtime's socket. That socket is not the builder's data: it
exists already, the machine owns it, and declaring it as one of the
module's directories would be a lie the host would act on.

Two kinds of mount are spelled identically today — the directory my data
lives in, and a machine facility I was granted. Until a manifest can say
which, the fourteen declared mounts are right by coincidence, which is
what this issue was opened about.

Recorded rather than decided: separating them is new vocabulary, and
inventing it to turn a check green is how a mechanism nobody chose ends
up load-bearing.
This commit is contained in:
2026-09-01 19:45:55 +02:00
parent bd8f09d647
commit e75683c01f
@@ -1,8 +1,8 @@
--- ---
status: fixed status: located
opened: 2026-09-01 opened: 2026-09-01
located-in: [mesh-control] located-in: [mesh-control]
fixed-by: mesh-control 53eb000 fixed-by: partly — mesh-control 53eb000, withdrawn in 83c6a2f
amended-design: amended-design:
--- ---
@@ -69,17 +69,28 @@ arrangement being replaced, which put everything under one directory per service
right here is a separate question, and a bigger one — it decides what a person backs up, and what right here is a separate question, and a bigger one — it decides what a person backs up, and what
survives a module being removed. survives a module being removed.
## Fixed ## Half fixed
**All fourteen are declared**, across the forge, the mail system, the store and the object store — **All fourteen are declared**, across the forge, the mail system, the store and the object store —
each mount now resolves to a `directory` or to a file the module already names. each mount now resolves to a `directory` or to a file the module already names.
**And a manifest that does not declare one is refused**, where it is written. The manifests being **Enforcing it was tried and withdrawn**, and the withdrawal is the interesting half. A refusal
right today was a coincidence: nothing said they had to be, so the next volume somebody added for any mount no resource declares refuses the **builder**, which mounts the container runtime's
would have been undeclared again and nothing would have said so. A path under a declared directory socket. That socket is not the builder's data. It does not belong to the module, it already exists,
counts as declared, as do a module's own secrets, its grants, and what it receives. and declaring it as one of the module's own directories would be a lie that the host would act on.
Refused in the control plane rather than on the machine, which cannot tell the difference: by the So the rule is right about data and wrong about everything else, because the manifest cannot
time the host sees the mount it is being asked to create a directory, which it is perfectly able to currently say which a path is. Two kinds of mount are spelled identically:
do. The fault is in the manifest, so it is named at the manifest — the same argument as the action
refusal it now sits beside. - **the directory my data lives in** — created if absent, owned by the module, protected by
[ADR 0030](../../02-DECISIONS/0030-data-outlives-the-mesh-that-declared-it.md)
- **a machine facility I was granted** — a socket, a device; it exists, the machine owns it, and
the module is being given access to it
`capabilities` is the closest existing thing to the second and names no paths. Inventing a field
to separate them is a design decision, so it is recorded here rather than made to get a check
green.
**Until then the manifests are right by coincidence**, which is the state this issue was opened
about. What is kept is a check that every real manifest still parses — worth nothing against this
fault, and the reason the next attempt finds out in a second rather than in a fifteen-minute run.