hyperhive/nix/host-modules/swarm-required-services.nix
atlas d2fb4bff79 feat(#3125): reshape the hive-to-swarm OTEL hop by domain
Drops swarm.otel.url (a loopback default an operator had to override on a
split host) in favor of swarm.otel.domain -- the same
gateway.localNames + nginx-vhost-through-the-gateway shape every other
swarm service (authelia, grafana, victoriametrics, ui) already uses. The
hive tier's exporter now reaches it as https://<domain> unconditionally,
resolved locally by dnsmasq on a co-located host and over the real network
otherwise, instead of a config knob nobody sets until they hit the silent
drop.

Costs CA trust on the hive tier: otel.nix wires
lib/hive-ca-trust.nix's trustBundle with hostUnit = true on the
opentelemetry-collector host unit, the same flag #3441/#3442 added for
swarm-controller and hive-c0re.

mara, #3125 comment 58363: "go c".
2026-08-18 21:02:18 +02:00

84 lines
3.8 KiB
Nix

# "The swarm-wide services run HERE."
#
# A swarm has one forge, one matrix, one SSO. This says this host is
# where they live, and asserts the per-service `enable`s that follow —
# the same mode-not-default shape as ./local-defaults.nix, one tier down.
#
# Only the *optional* services derive: matrix and authelia. The forge has
# no `enable` to assert, because it is not optional — it is the canonical
# store for the meta flake and every agent's config repo, so it deploys
# with hyperhive itself.
{
lib,
config,
...
}:
let
swarmCfg = config.services.hyperhive.swarm;
in
{
options.services.hyperhive.swarm.enableRequiredServices = lib.mkOption {
type = lib.types.bool;
default = false;
example = true;
description = ''
Host the swarm's shared services on this hive. The services that
exist once per swarm rather than once per hive and are *optional*
the matrix homeserver, the SSO provider have their `enable`
asserted from this, so a swarm's service host is declared in one
place.
The forge is swarm-wide too but has nothing to assert: it is the
canonical store for the meta flake and every agent's config repo,
so it deploys with hyperhive itself and is not optional.
`services.hyperhive.enableAllLocalDefaults` turns this on as part
of the all-on-one-box mode. Set it directly to run the swarm's
services on a host that is not otherwise all-local a dedicated
services box with hives elsewhere is exactly that shape.
With it off, this hive is a *client* of those services: it still
configures how to reach them, it just doesn't run them.
'';
};
# Same precedence reasoning as ./local-defaults.nix: fills in for an
# operator who hasn't spoken, yields to one who has.
config.services.hyperhive.swarm = {
matrix.enable = lib.mkDefault swarmCfg.enableRequiredServices;
authelia.enable = lib.mkDefault swarmCfg.enableRequiredServices;
# The queue. Added later than the two above and missed at the time —
# this file predates the `swarm-nats` container by nine days and had
# not been revisited since, so its absence was sequence rather than
# intent. It meets the rule in the option's own description exactly:
# once per swarm, and optional.
#
# The tell that it was an omission: `local-defaults.nix` already
# derives `nats.autoGenerateCallout` from the all-local mode, so that
# mode was minting the queue's callout nkeys and then never starting
# the queue they authenticate against.
nats.enable = lib.mkDefault swarmCfg.enableRequiredServices;
# The metrics pair. Once per swarm and optional, so they meet the rule
# in the option's description the same way the three above do — a hive
# that is not the service host is a *client* of this Grafana, not a
# second one.
#
# They derive together on purpose: a store with no UI is unreadable and
# a UI with no store is empty, so there is no sensible deployment that
# takes one and not the other from this switch. An operator who wants
# exactly one still sets it directly, which `mkDefault` allows.
victoriametrics.enable = lib.mkDefault swarmCfg.enableRequiredServices;
grafana.enable = lib.mkDefault swarmCfg.enableRequiredServices;
# The collector that feeds the pair above, and the only tier holding
# the upstream credential. Same rule as the rest: once per swarm,
# optional, and a hive that is not the service host is a *client* of
# it (by name, `swarm.otel.domain`) rather than a second one.
otel.enable = lib.mkDefault swarmCfg.enableRequiredServices;
};
# The collector that feeds the pair above (note: no `swarm.` prefix,
# this is ./otel.nix's existing per-hive option).
config.services.hyperhive.otel.enable = lib.mkDefault swarmCfg.enableRequiredServices;
}