Two assertions in the full-mesh test encoded the old naming: the grant
file read back from the provider, and the PostgreSQL role the real
application logs in as. Both are named after the consumer now, and a
consumer is a module on a machine.
These are the two that matter most in this file — it is the only place
where a real application authenticates against a real database with a
password the mesh delivered and cannot read, so they are what would have
caught the naming going wrong end to end.
novox/hq 04-ISSUES/022: a consumer is a module on a machine, not a
machine. The mesh now writes <node>.<module>.secret and the provisioners
name the role and the access key after both.
The fixtures here write what the mesh writes, so they move with it —
that is the whole point of them, and a fixture that kept the old shape
would agree with the bug rather than catch it.
The object-store assertions are the ones that mattered most: one store
holds every bucket behind one endpoint, so isolation is a policy rather
than a property. One access key per machine meant every module on a node
shared it, and the policy confining each consumer to its own bucket
confined none of them.
The mesh generates a password, seals it to the machine that must accept
it, and discards the plaintext — so it cannot tell PostgreSQL to start
accepting it. Something on that machine reads what the host wrote and
makes it true. Everything up to that step is proven elsewhere; this is
where a password either becomes a login or does not.
A scenario with one machine and a database, and six assertions: the
password works, running again reaches the same state and says nothing,
rotation makes the new one work and the old one stop, a departed consumer
loses its login, a role nobody here made is left alone, and a manifest
naming a credential that was never written is refused rather than
creating a login with no password.
Each was confirmed to fail — and only it to fail — with the behaviour
removed from the provisioner: only-creates breaks rotation, no-revoke
breaks revocation, revoking everything breaks the bystander role, and
ignoring a missing credential breaks the refusal.
Two faults in the test itself, both worth recording:
- it checked logins from inside the database's own container over
127.0.0.1, which PostgreSQL's default pg_hba trusts. No password was
ever verified. Demonstrated directly: over loopback a deliberately
wrong password still returns a row. Only the rotation assertion
noticed, because it is the one that requires a password to STOP
working — which is an argument for writing that assertion every time.
- the fix then read .NetworkSettings.IPAddress, which docker 29 no
longer populates. It templates to empty, psql falls back to a unix
socket that is not there, and every login looks impossible rather than
misconfigured.
jschoubben