vidhar: knot-resolverflakes

4 files changed, 44 insertions, 96 deletions

diff --git a/hosts/vidhar/dns/default.nix b/hosts/vidhar/dns/default.nix
index 11e6f55f..14d212e7 100644
--- a/hosts/vidhar/dns/default.nix
+++ b/hosts/vidhar/dns/default.nix
@@ -12,73 +12,36 @@ let
   in filter (v: v != null) (mapAttrsToList toKeyInfo (builtins.readDir dir));
 in {
   config = {
-    services.unbound = {
+    services.knot-resolver = {
       enable = true;
-      resolveLocalQueries = false;
-      stateDir = "/var/lib/unbound";
-      localControlSocketPath = "/run/unbound/unbound.ctl";
-      enableRootTrustAnchor = false;
       settings = {
-        server = {
-          interface = ["lo" "lan"];
-          prefer-ip6 = true;
-          access-control = ["0.0.0.0/0 allow" "::/0 allow"];
-          root-hints = "${pkgs.dns-root-data}/root.hints";
-          trust-anchor-file = "${pkgs.dns-root-data}/root.key";
-          trust-anchor-signaling = false;
-          ip-dscp = 20;
-
-          num-threads = 12;
-          so-reuseport = true;
-          msg-cache-slabs = 16;
-          rrset-cache-slabs = 16;
-          infra-cache-slabs = 16;
-          key-cache-slabs = 16;
-
-          rrset-cache-size = "100m";
-          msg-cache-size = "50m";
-          outgoing-range = 8192;
-          num-queries-per-thread = 4096;
-
-          so-rcvbuf = "4m";
-          so-sndbuf = "4m";
-
-          # serve-expired = true;
-          # serve-expired-ttl = 86400;
-          # serve-expired-reply-ttl = 0;
-
-          prefetch = true;
-          prefetch-key = true;
-
-          minimal-responses = false;
-
-          extended-statistics = true;
-
-          rrset-roundrobin = true;
-          use-caps-for-id = true;
-
-          do-not-query-localhost = false;
-          local-zone = [
-            "141.10.in-addr.arpa. transparent"
-            "1.0.0.0.a.d.a.0.2.5.0.0.0.0.0.4.3.0.a.2.ip6.arpa. transparent"
-            "yggdrasil. transparent"
-          ];
-          domain-insecure = [
-            "141.10.in-addr.arpa."
-            "1.0.0.0.a.d.a.0.2.5.0.0.0.0.0.4.3.0.a.2.ip6.arpa."
-            "yggdrasil."
-          ];
-        };
-
-        stub-zone = map (name: {
-          inherit name;
-          stub-addr = "127.0.0.1@5353";
-          stub-first = true;
-          stub-no-cache = true;
-          stub-prime = false;
-        }) ["yggdrasil." "arpa.in-addr.10.141." "1.0.0.0.a.d.a.0.2.5.0.0.0.0.0.4.3.0.a.2.ip6.arpa."];
+        network.listen = [
+          { interface = "lo"; }
+          { interface = "lan"; freebind = true; }
+        ];
+        forward = [
+          {
+            subtree = "yggdrasil.";
+            servers = [ { address = "::1@5353"; } ];
+            options.dnssec = false;
+          }
+          {
+            subtree = "141.10.in-addr.arpa.";
+            servers = [ { address = "::1@5353"; } ];
+            options.dnssec = false;
+          }
+          {
+            subtree = "1.0.0.0.a.d.a.0.2.5.0.0.0.0.0.4.3.0.a.2.ip6.arpa.";
+            servers = [ { address = "::1@5353"; } ];
+            options.dnssec = false;
+          }
+        ];
       };
     };
+    fileSystems."/var/cache/knot-resolver" = {
+      fsType = "tmpfs";
+      options = [ "size=200M" "nosuid" "nodev" "noexec" "mode=0700" ];
+    };
 
     systemd.services.knot = {
       unitConfig.RequiresMountsFor = [ "/var/lib/knot" ];
diff --git a/hosts/vidhar/network/pppoe.nix b/hosts/vidhar/network/pppoe.nix
index 52a1818b..7b342b69 100644
--- a/hosts/vidhar/network/pppoe.nix
+++ b/hosts/vidhar/network/pppoe.nix
@@ -141,11 +141,5 @@ in {
       bindsTo = [ "sys-subsystem-net-devices-telekom.device" ];
       after = [ "sys-subsystem-net-devices-telekom.device" ];
     };
-
-    systemd.services.unbound = {
-      serviceConfig = {
-        Restart = lib.mkForce "always";
-      };
-    };
   };
 }
diff --git a/hosts/vidhar/prometheus/default.nix b/hosts/vidhar/prometheus/default.nix
index 4a5fa3c8..35942c53 100644
--- a/hosts/vidhar/prometheus/default.nix
+++ b/hosts/vidhar/prometheus/default.nix
@@ -39,11 +39,6 @@ in {
           enable = true;
           configurationPath = pkgs.copyPathToStore "${pkgs.prometheus-snmp-exporter.src}/snmp.yml";
         };
-        unbound = {
-          enable = true;
-          unbound.host = "unix:///run/unbound/unbound.ctl";
-          group = config.services.unbound.group;
-        };
         wireguard = {
           enable = true;
           wireguardConfig =
@@ -164,10 +159,11 @@ in {
           ];
           scrape_interval = "10s";
         }
-        { job_name = "unbound";
+        { job_name = "knot-resolver";
           static_configs = [
-            { targets = ["localhost:${toString config.services.prometheus.exporters.unbound.port}"]; }
+            { targets = ["localhost:9167"]; }
           ];
+          metrics_path = "/metrics/prometheus";
           relabel_configs = relabelHosts;
           scrape_interval = "1s";
         }
@@ -241,7 +237,7 @@ in {
           [ { source_labels = ["__param_target"];
               target_label = "job";
               regex = "127\.0\.0\.1:53";
-              replacement = "unbound.dns_soa";
+              replacement = "knot-resolver.dns_soa";
             }
             { replacement = "localhost:${toString config.services.prometheus.exporters.blackbox.port}";
               target_label = "__address__";
@@ -332,20 +328,6 @@ in {
       };
     };
 
-    users.users.${config.services.prometheus.exporters.unbound.user} = {
-      description = "Prometheus unbound exporter service user";
-      isSystemUser = true;
-      group = config.services.unbound.group;
-    };
-    systemd.services."prometheus-unbound-exporter" = {
-      wantedBy = [ "unbound.service" ];
-      serviceConfig = {
-        DynamicUser = false;
-        Restart = lib.mkForce "always";
-        RestartSec = "5";
-      };
-    };
-
     systemd.services."prometheus-nftables-exporter" = {
       wantedBy = [ "multi-user.target" ];
       after = [ "network.target" ];
@@ -501,6 +483,20 @@ in {
       sopsFile = ./zte_dsl01.mgmt.yggdrasil;
     };
 
+    systemd.sockets."prometheus-knot-resolver-exporter" = {
+      unitConfig.WantedBy = [ "sockets.target" ];
+      socketConfig.ListenStream = "[::1]:9167";
+    };
+    systemd.services."prometheus-knot-resolver-exporter" = {
+      unitConfig = {
+        BindsTo = [ "knot-resolver.service" ];
+      };
+      serviceConfig = {
+        Type = "notify";
+        ExecStart = "${config.systemd.package}/lib/systemd/systemd-socket-proxyd /run/knot-resolver/kres-api.sock";
+      };
+    };
+
     services.corerad = {
       enable = true;
       settings = {
diff --git a/hosts/vidhar/zfs.nix b/hosts/vidhar/zfs.nix
index 9d667fd6..4b009c0d 100644
--- a/hosts/vidhar/zfs.nix
+++ b/hosts/vidhar/zfs.nix
@@ -44,11 +44,6 @@ with lib;
           fsType = "zfs";
         };
 
-      # "/var/lib/unbound" =
-      #   { device = "ssd-raid1/local/var-lib-unbound";
-      #     fsType = "zfs";
-      #   };
-
       # "/var/lib/dhcp" =
       #   { device = "ssd-raid1/local/var-lib-dhcp";
       #     fsType = "zfs";