Both halves had one cause: the mesh knew something and did not say it.
Who a consumer is now comes from one derivation, sent to the provider in
its grant and to the consumer in its binding, so the two agree by
construction. The provisioners use the name they are given and refuse to
invent one, because a name of their own would create a login the
consumer could never guess while everything reported success.
Bound values reach the file that needs them through the symmetric twin
of the sealed placeholder — simpler, because they are not secret, so the
control plane fills them in and the host gains nothing.
The lab run meant to prove this failed in a way that looked like the fix
being wrong: rotation could not authenticate against a real database.
The cause was the suite rebuilding the control plane's image and not the
provisioner's, so an image built that minute ran against a provisioner
built the day before. That is 005's family and is recorded with the
issue, because the misleading part is worth more than the fix.
jschoubben
f583502fc9