jschoubben
333356cff3
Jochen asked whether the order made sense. It did not -- it followed when things happened to be decided, which after consolidation is fictional anyway since record 5 alone folds decisions taken across a week. Concretely wrong before: the domain statement sat at 8, after five engineering rules; the constitution was scattered across 5, 12 and 17; the tiers landed at 15, 16, 21 and 22 with process records in between. Now it walks: what the mesh is (1-3), its tiers from the bottom up (4-8), what runs on them and how it gets there (9-10), how it is built (11-16), how it is checked (17-18), how we work (19-23). Two things made this safe rather than free. It is a permutation, not a compaction, so the renames go through temporary names -- otherwise two files want one slot and one is lost. And the reference rewrite is a single simultaneous pass, because almost every number moved into a slot another number was vacating; replacing one at a time would have cascaded and pointed things at the wrong record while still resolving. Verified: 284 [ADR NNNN](path) links across the repository, all with matching text and target. The ordering principle is now stated in 19 rather than left implicit -- the repository already said "the numbering is the flow" about its folders, and there was no reason for the records to be the exception.
60 lines
2.9 KiB
Markdown
60 lines
2.9 KiB
Markdown
---
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status: graduated
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initiated: 2026-08-22
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touches: [03-DESIGN/00-as-is/04-delivery.md, 03-DESIGN/00-as-is/05-runtime-and-installation.md]
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became: [03-DESIGN/01-to-be/01-end-to-end-testing.md, 02-DECISIONS/0016-the-lab.md]
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---
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# 002 — A mesh that runs locally
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- **Initiated by:** jochen, 2026-08-22
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- **Areas touched:** `install.d/`, `hal/meshware`, `hal/coordinator`, `hal/brain`,
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`hal/developer` (`dev_up`), `hal/sdk` (env generation, feature handlers, artifact
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manager), `test/pipeline/`, `test/dev-mesh/`, the provisioning path in
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`modules/postgres/`.
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## Summary
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Phase 0 of [`03-DESIGN/00-work-breakdown.md`](../../03-DESIGN/01-to-be/00-work-breakdown.md) requires
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a mesh that comes up in containers, runs its own pipeline, and reproduces known faults on
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demand. Nothing else in the decomposition starts until it exists, because every fault the
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decomposition addresses was found in production — there was nowhere else to find it.
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This effort establishes what already runs in a container, what is welded to the host, and
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what it would take to close the gap. It does **not** choose an approach: the central
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question — how a containerised node executes a module service, when a module service is
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defined today as a systemd unit shelling to `docker compose` in `/services/` — is not
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answered by ADR 0001 and is recorded below rather than decided.
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## What was established
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- The two existing container harnesses are **neither of them a mesh**, and one of them has
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not been able to build since 2026-06-04.
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- Node identity is already portable — a single environment variable, no host handshake.
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- Four concrete host couplings block a containerised node, all with known locations.
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- All three Phase 0 fixtures are reproducible; one of them is documented in the knowledge
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base with an open root cause and is the cheapest place to start.
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Detail and evidence in [`analysis.md`](analysis.md).
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## Questions — all settled 2026-08-22
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**Phase 0 is a development environment**, not a fixture rig — it is what the host-borrowing
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dev tooling becomes.
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**The trigger is a real source-forge container**, because the webhook relay is part of what
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is under test.
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**A node is a system container**, promotable to a virtual machine per node. This answered
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the question the effort was stuck on, and dissolved it rather than solving it: against a
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real node with a real init, the four host couplings catalogued in `analysis.md` §3 are not
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couplings — they are how a node works. They were obstacles only to a node modelled as an
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application container.
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Consequently [`003-service-supervision`](../003-service-supervision/) **no longer blocks
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Phase 0**. It remains a live architecture question, on its own timeline.
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The remaining questions in `analysis.md` — what replaces host paths in a container, and how
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faithful the lab must be — are answered in the design: nothing replaces them, because the
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paths are real; and the divergences are enumerated rather than discovered.
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