nixos-config/components/monitor/metrics-prometheus.nix

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{ config, lib, ... }:
with lib;
with types;
let
cfg = config.components.monitor.prometheus;
in
{
options.components.monitor.prometheus = {
enable = mkOption {
type = lib.types.bool;
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default = config.components.monitor.metrics.enable;
};
port = mkOption {
type = int;
default = 8090;
description = "port to provide Prometheus export";
};
};
config = mkMerge [
(mkIf config.components.monitor.prometheus.enable {
services.prometheus = {
checkConfig = "syntax-only";
enable = true;
};
})
(mkIf config.components.monitor.prometheus.enable {
services.opentelemetry-collector.settings = {
exporters.prometheus.endpoint = "127.0.0.1:${toString cfg.port}";
service.pipelines.metrics.exporters = [ "prometheus" ];
};
services.prometheus.scrapeConfigs = [
{
job_name = "opentelemetry";
metrics_path = "/metrics";
scrape_interval = "10s";
static_configs = [{ targets = [ "localhost:${toString cfg.port}" ]; }];
}
];
})
];
}