From d3354f4276a55a45717121f1e979240e779301a1 Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Fri, 8 Apr 2022 16:51:43 +0200
Subject: ...

---
 hosts/surtr/dns/default.nix         |  2 +-
 hosts/vidhar/prometheus/default.nix | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 1 deletion(-)

(limited to 'hosts')

diff --git a/hosts/surtr/dns/default.nix b/hosts/surtr/dns/default.nix
index 28e0df73..d2ad0bb6 100644
--- a/hosts/surtr/dns/default.nix
+++ b/hosts/surtr/dns/default.nix
@@ -207,7 +207,7 @@ in {
 
       settings = {
         server = {
-          interface = ["lo"];
+          interface = ["lo@5353"];
           prefer-ip6 = true;
           access-control = ["127.0.0.0/8 allow" "::1/128 allow"];
           root-hints = "${pkgs.dns-root-data}/root.hints";
diff --git a/hosts/vidhar/prometheus/default.nix b/hosts/vidhar/prometheus/default.nix
index 0bf1ca58..2c9831e5 100644
--- a/hosts/vidhar/prometheus/default.nix
+++ b/hosts/vidhar/prometheus/default.nix
@@ -80,6 +80,20 @@ in {
             "--collector.unit-whitelist=(dhcpcd-dsl|pppd-telekom|corerad|ndppd)\.service"
           ];
         };
+        blackbox = {
+          enable = true;
+          configFile = pkgs.writeText "blackbox-config.yaml" (builtins.toJSON {
+            modules = {
+              "dns_soa" = {
+                prober = "dns";
+                dns = {
+                  query_name = ".";
+                  query_type = "SOA";
+                };
+              };
+            };
+          });
+        };
       };
 
       globalConfig = {
@@ -201,6 +215,25 @@ in {
           relabel_configs = relabelHosts;
           scrape_interval = "5s";
         }
+        { job_name = "blackbox";
+          metrics_path = "/probe";
+          params = { module = ["dns_soa"]; };
+          static_configs = [
+            { targets = ["127.0.0.53:53" "127.0.0.1:5353"]; }
+          ];
+          relabel_configs = [
+            { source_labels = ["__address__"];
+              target_label = "__param_target";
+            }
+            { source_labels = ["__param_target"];
+              target_label = "instance";
+            }
+            { replacement = "localhost:${toString config.services.prometheus.exporters.blackbox.port}";
+              target_label = "__address__";
+            }
+          ];
+          scrape_interval = "5s";
+        }
       ];
 
       rules = [
-- 
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