38 lines
1.7 KiB
Nix
38 lines
1.7 KiB
Nix
# Glue: declare the loopback scrape targets of authelia, grafana and nats on the
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# swarm's OTEL collector, wherever one of them shares a host with it.
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#
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# ONE FILE, THREE PAIRINGS — each service ← the collector, with the same shape.
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# Deleting this leaves the collector scraping none of them: no error, no
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# metrics.
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#
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# Each target is gated on the service AND the collector being enabled here. The
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# loopback address is only honest when both run on this host; a target nobody
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# can read asserts a collection that is not happening. Both services default
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# from `deploy.allSwarmServices`, but `mkDefault` is an invitation to override,
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# so co-location is a property of the auto-deployed topology, not the modules.
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#
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# ⚠️ Silent when split: separate hosts are separate evaluations with no shared
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# context, so a host running a service and no collector declares nothing and
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# the collector's host never learns of the service. No error, no warning — a
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# healthy exporter and an empty dashboard. Not guardable from here.
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#
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# ⚠️ `swarm.otel`, not `hyperhive.otel` — two collectors one word apart, and only
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# this one reads `scrapeTargets`.
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{
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lib,
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config,
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...
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}:
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let
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hyperhiveCfg = config.services.hyperhive;
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deployCfg = hyperhiveCfg.deploy;
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swarmCfg = hyperhiveCfg.swarm;
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withCollector = service: lib.mkIf (deployCfg.${service}.enable && deployCfg.swarm-otel.enable);
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in
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{
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config.services.hyperhive.swarm.otel.scrapeTargets = {
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authelia = withCollector "authelia" "127.0.0.1:${toString swarmCfg.authelia.metricsPort}";
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grafana = withCollector "grafana" "127.0.0.1:${toString swarmCfg.grafana.metricsPort}";
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nats = withCollector "nats" "127.0.0.1:${toString swarmCfg.nats.metricsPort}";
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};
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}
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