83 lines
2.2 KiB
Nix
83 lines
2.2 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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cfg = config.custom.prometheus;
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in
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{
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config = lib.mkIf (cfg.enable && cfg.exporters.blackbox.enable) {
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services.prometheus.exporters.blackbox = {
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enable = true;
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listenAddress = "127.0.0.1";
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configFile = pkgs.writeText "blackbox.config.yaml" (
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lib.generators.toYAML {} {
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modules = {
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tcp4_connect = {
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prober = "tcp";
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tcp = {
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ip_protocol_fallback = false;
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preferred_ip_protocol = "ip4";
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tls = false;
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};
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timeout = "15s";
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};
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};
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}
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);
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};
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services.prometheus.scrapeConfigs = [
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{
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job_name = "blackbox";
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scrape_interval = "1m";
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metrics_path = "/probe";
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params = {
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module = [ "tcp4_connect" ];
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};
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static_configs = [
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{
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targets = [
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"tok-00.namely.icu:8080"
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"la-00.video.namely.icu:8080"
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"auth.xinyang.life:443"
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"home.xinyang.life:8000"
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];
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}
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];
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relabel_configs = [
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{
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source_labels = [ "__address__" ];
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target_label = "__param_target";
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}
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{
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source_labels = [ "__param_target" ];
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target_label = "instance";
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}
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{
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target_label = "__address__";
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replacement = "127.0.0.1:${toString config.services.prometheus.exporters.blackbox.port}";
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}
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];
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}
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{
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job_name = "blackbox_exporter";
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static_configs = [
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{ targets = [ "127.0.0.1:${toString config.services.prometheus.exporters.blackbox.port}" ]; }
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];
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}
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];
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custom.prometheus.ruleModules = [
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{
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name = "probe_alerts";
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rules = [
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{
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alert = "HighProbeLatency";
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expr = "probe_duration_seconds > 0.5";
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for = "2m";
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labels = { severity = "warning"; };
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annotations = { summary = "High request latency on {{ $labels.instance }}"; description = "95th percentile of request latency is above 0.5 seconds for the last 2 minutes."; };
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}
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];
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}
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];
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};
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}
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