`swarm-bao.nix` declared the store's half of the mTLS pair as options —
`serverCertFile`, `serverKeyFile`, `clientCaFile` — and left the reader's
half as a literal inside `glue-bao-tls.nix`, which only runs where
`deploy.bao.enable` is set. A hive that did not host the store therefore
could not read from it and could not be pointed at a certificate even
when one had been placed by hand.
Adds `clientCertFile`, `clientKeyFile` and `serverCaFile` beside their
three server siblings, `mkDefault`ed by the glue to the leaf it already
mints, and moves `glue-matrix-bao-token.nix` onto them. Its gate becomes
"this host holds an identity" rather than "the store is a neighbour",
and the unit ordering that names store-local units is now conditional --
`Requires=` on an absent unit fails the job.
`serverCaFile` is separate from `clientCaFile` on purpose: one is the
store choosing which readers to trust, the other a reader choosing which
store to trust. Self-signing collapses them to one file, which is a
property of that deployment and not of the pairing.
Closes#3855.
The comment said it bounds the wait rather than hanging the boot, and
nothing in the unit bounded anything. What actually held was systemd's
default start timeout plus the homeserver only Wants= this unit — both
true, neither stated here, so a reader had to already know them.
TimeoutStartSec puts the number a boot waits on in the file that waits,
and the comment now names the degradation: hitting it keeps the locally
minted token, same as every other failure path in this unit.
Caught by argus reviewing the slice it shipped in.
Fetches an opaque 32-byte value and writes it where hive-matrix.nix
already looks, so the homeserver never learns the store exists.
Chosen over authelia's OIDC secret deliberately: that one needs a
.secret AND a matching .digest, so shipping it first would debug 'can a
reader authenticate and get bytes back' and 'did we write authelia's
file format right' at once, with an SSO outage as the failure mode. Here
the failure is narrow -- new agent accounts cannot be provisioned,
existing ones untouched.
Every failure path keeps the local token: no such key, sealed store,
unreachable store, empty value. The activation script's mint-if-absent
is untouched, so a hive with no store behaves exactly as it does today.
matrixMachine is a literal because hive-matrix.nix declares no `machine`
option -- `matrixCfg.machine` parses cleanly and fails at module-system
resolution, which is the kind of error only reading the target module
catches.
