Files
mesh-controller/go.sum
T
jschoubben c3046dcf56 A provider is told who its consumers are, and a reference provisioner
Contributions were node-local, so a mesh-scoped provider — the one case
that most needs them — never heard from its consumers. A database was
given a password and no idea what to create it for.

Cross-node consumers now reach the provider's `receives` file, merged in
with the ones on its own machine: from the provider's side they are the
same thing, and a provider that had to read two lists would read one of
them. Each names the file its credential is in rather than carrying it,
because the mesh discarded the value and could not put it there. The
readable half therefore stays readable.

And examples/postgres-provisioner, which is the last step: it reads what
the host wrote and makes PostgreSQL accept it. Explicitly not part of the
control plane — the control plane decides and never touches a machine.
This runs on the machine and touches it, and a real one ships with the
module that ships PostgreSQL. It lives here because this is where the
contract is defined, written as something that runs so it can be read.

It reconciles rather than applying a change, because it is never told
what changed. Three things that follow, and each is a fault somebody has
shipped:

- the password is set every time, not only on creation, or a rotation
  reports success and changes nothing
- what it made and nobody asks for any more is revoked, or a departed
  consumer keeps a working login for ever
- what it did not make is left alone, or it cannot be run on a database
  that predates it

Proven in the lab against a real PostgreSQL, each assertion confirmed to
fail with the behaviour removed. The suite is in mesh-lab, which also
records the two ways the test itself was wrong first.
2026-08-30 01:31:25 +02:00

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