Creating a hive's cert-auth role means writing the authority into the role
by value -- the store matches a presented certificate against the role's own
copy -- and nothing gave this daemon that file.
Named separately from deploy.bao.clientCaFile rather than read off it: that
option is the store's, saying which readers the store trusts on the host
that runs it, while a controller runs anywhere. The glue module supplies it
where the two are co-located, which is the same split baoClientCertFile
already makes against the hive reader's leaf.
Gated on the identity as well as the CA. Without a leaf there is nothing to
write a role with, so the file would reach a daemon that cannot act on it.
The module-eval arm needed a fixture of its own: a deployment that
self-signs both ends points clientCaFile and serverCaFile at one file, so on
the existing fixture the two authorities are the same string and wiring
either into the other's slot passes. controllerTwoCas is where they differ.
glue-bao-tls.nix signs a third leaf. It is minted whether or not a
controller runs here, because the case it serves is the one where it
does not: a controller elsewhere needs a leaf from this CA and cannot
sign one, so issuing it here turns "obtain a certificate out of band"
into "copy this file".
glue-controller-bao-identity.nix holds the pairing and nothing else --
which paths this host's controller reads. Gated on the leaf existing
rather than on deploy.bao.enable, so a controller on the store's host
and one three networks away with an out-of-band leaf get the same
wiring; gating on the store would have made the co-located case the
only supported shape. The directory comes from deploy.bao.clientCertFile
rather than repeating glue-bao-tls.nix's literal, so moving the PKI
moves both.
module-eval gains three cases and two fixtures, because nothing asserted
the PKI script before: an earlier commit added a leaf to that rendered
unit and left the derivation unchanged. The fixture's CN is deliberately
a value no default could supply, so "the role and the leaf both carry
it" says they read one option rather than that both happen to say
swarm-controller.
Gates: 62 module properties hold (59 before, plus these three), on a
derivation hash that actually moved -- this suite is a cache hit when
only fixtures change, so an unchanged hash would have meant the cases
never ran. nix fmt clean, all three scripts/check-*.sh exit 0.
