From 3d4845954b273f08cd120a1d11b032d635c19ef0 Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Tue, 15 Feb 2022 16:32:23 +0100
Subject: surtr: unbound

---
 hosts/surtr/dns/default.nix | 58 ++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 55 insertions(+), 3 deletions(-)

(limited to 'hosts/surtr/dns/default.nix')

diff --git a/hosts/surtr/dns/default.nix b/hosts/surtr/dns/default.nix
index abb5d50e..87ab922c 100644
--- a/hosts/surtr/dns/default.nix
+++ b/hosts/surtr/dns/default.nix
@@ -20,8 +20,8 @@
         remote:
           - id: inwx_notify
             address: 185.181.104.96@53
-          - id: google
-            address: ["8.8.8.8"]
+          - id: recursive
+            address: 127.0.0.1@5353
 
         acl:
           - id: inwx_acl
@@ -40,7 +40,7 @@
 
         submission:
           - id: validating-resolver
-            parent: google
+            parent: recursive
 
         policy:
           - id: rsa2048
@@ -106,5 +106,57 @@
             file: ${./zones/org.rheperire.soa}
       '';
     };
+
+
+    fileSystems."/var/lib/unbound" =
+      { device = "surtr/safe/var-lib-unbound";
+        fsType = "zfs";
+      };
+
+    systemd.services.unbound.unitConfig.RequiresMountFor = [ "/var/lib/unbound" ];
+
+    services.unbound = {
+      enable = true;
+      resolveLocalQueries = false;
+      stateDir = "/var/lib/unbound";
+      localControlSocketPath = "/run/unbound/unbound.ctl";
+
+      settings = {
+        server = {
+          interface = ["127.0.0.1:5353" "::0:5353"];
+          access-control = ["127.0.0.0/8 allow" "::0/128 allow"];
+          root-hints = "${pkgs.dns-root-data}/root.hints";
+
+          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;
+        };
+      };
+    };
   };
 }
-- 
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