infra/modules/nginx-prometheus-exporters/default.nix

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{ config, flake, lib, ... }:
let
# Find element in list config.services.matrix-synapse.settings.listeners
# that sets type = "metrics"
listenerWithMetrics = lib.findFirst
(listener:
listener.type == "metrics")
(throw "Found no matrix-synapse.settings.listeners.*.type containing string metrics")
config.services.matrix-synapse.settings.listeners
;
synapseMetricsPort = "${toString listenerWithMetrics.port}";
in
{
age.secrets.nachtigall-metrics-nginx-basic-auth = {
file = "${flake.self}/secrets/nachtigall-metrics-nginx-basic-auth.age";
mode = "600";
owner = "nginx";
};
services.nginx.virtualHosts = {
"nachtigall.${config.pub-solar-os.networking.domain}" = {
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enableACME = true;
addSSL = true;
basicAuthFile = "${config.age.secrets.nachtigall-metrics-nginx-basic-auth.path}";
locations."/metrics" = {
proxyPass = "http://127.0.0.1:${toString(config.services.prometheus.exporters.node.port)}";
};
locations."/_synapse/metrics" = {
proxyPass = "http://127.0.0.1:${synapseMetricsPort}";
};
};
};
}