{ config, lib, ... }: with lib; with types; let cfg = config.components.monitor.prometheus; in { options.components.monitor.prometheus = { enable = mkOption { type = lib.types.bool; 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}" ]; } ]; } ]; }) ]; }