{ config, nodes, lib, ... }: let host = "prometheus.dgnum.eu"; port = 9091; nodeExporterConfigs = lib.flatten ( lib.mapAttrsToList ( node: { config, ... }: lib.optional config.dgn-node-monitoring.enable { targets = [ "${node}.dgnum:${builtins.toString config.dgn-node-monitoring.port}" ]; labels = { host = node; }; } ) nodes ); in { services.prometheus = { enable = true; inherit port; checkConfig = "syntax-only"; enableReload = true; listenAddress = "127.0.0.1"; webConfigFile = config.age.secrets."prometheus-web_config_file".path; webExternalUrl = "https://${host}"; retentionTime = "6m"; extraFlags = [ "--storage.tsdb.retention.size=20GB" ]; globalConfig = { scrape_interval = "15s"; # if you change this settings, please do it in grafana also }; scrapeConfigs = [ { job_name = "prometheus"; static_configs = [ { targets = [ "localhost:9090" ]; } ]; } { job_name = "node_exporter"; static_configs = nodeExporterConfigs; } ]; }; services.nginx.virtualHosts.${host} = { enableACME = true; forceSSL = true; locations."/" = { proxyPass = "http://127.0.0.1:${builtins.toString port}"; proxyWebsockets = true; recommendedProxySettings = true; }; }; age-secrets.autoMatch = [ "prometheus" ]; }