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every hive runs its otel collector, and agents export to it by default

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atlas 2026-10-18 23:17:28 +02:00 • committed by mara
commit 13daf4c7dc
28 changed files with 245 additions and 303 deletions
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27
nix/module-eval/agent-otel.nix
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@ -47,7 +47,11 @@ let
otel.metricIntervalMs = 10000;
};
agentNoOtel = shared.agentBare;
# Sets nothing: what an agent gets on a hive, whose meta flake renders no
# otel line.
agentDefault = shared.agentBare;
agentNoOtel = agent { otel.enable = false; };
agentSettings = machine: machine.services.opentelemetry-collector.settings;
cases = [
@ -100,11 +104,30 @@ let
&& p.exporters != [ ]
&& lib.all (e: (s.exporters ? ${e}) && s.exporters.${e}.endpoint == agentBridge) p.exporters;
}
{
# 🎯 What the meta flake no longer says: an agent that sets nothing
# exports, to a name rather than an address. The name carries no swarm
# domain and no hive, so the same build is correct on every hive; the
# resolver of the hive it runs on answers it. `agentNoOtel` above is the
# control that these lookups find nothing where the switch is off.
name = "an agent with no otel config exports to the fixed hive-collector name by default";
ok =
let
endpoint = "http://hive-collector.hive:4318";
env = agentDefault.systemd.globalEnvironment;
s = agentSettings agentDefault;
in
agentDefault.services.hyperhive.agent.otel.enable
&& env.OTEL_EXPORTER_OTLP_ENDPOINT == endpoint
&& agentDefault.environment.variables.OTEL_EXPORTER_OTLP_ENDPOINT == endpoint
&& lib.all (e: s.exporters.${e}.endpoint == endpoint) s.service.pipelines.logs.exporters
&& !(agentNoOtel.systemd.globalEnvironment ? OTEL_EXPORTER_OTLP_ENDPOINT);
}
{
# Presence control for the two cases above: with the switch off there
# is no collector in the container at all, so their passing is about
# the wiring rather than about a unit that renders regardless.
name = "an agent that has not opted into telemetry runs no collector";
name = "an agent that switched telemetry off runs no collector";
ok = !agentNoOtel.services.opentelemetry-collector.enable;
}
{