Enable IPv6 support for K8s

Enable DNS over IPv6 and TCP to comply with isnic
Provision k3s CA
Make Atlas a k8s agent instead of server

kubenix-modules/all.nix

@@ -1,7 +1,5 @@
-{
-  imports = [
-    ./base.nix
-    ./custom-types.nix
+let
+  applications = [
     ./freshrss.nix
     ./cyberchef.nix
     ./kms.nix
@@ -17,15 +15,21 @@
     ./media.nix
     ./bind9
     ./dnsmasq.nix
-    ./esrom.nix
-    ./metallb.nix
-    ./cert-manager.nix
     ./minecraft.nix
-    ./custom/ingress.nix
-    ./custom/nfs-volume.nix
-    ./traefik.nix
     ./blog.nix
     ./atticd.nix
     ./argo.nix
   ];
+in
+{
+  imports = [
+    ./base.nix
+    ./custom-types.nix
+    ./esrom.nix
+    ./metallb.nix
+    ./cert-manager.nix
+    ./custom/ingress.nix
+    ./custom/nfs-volume.nix
+    ./traefik.nix
+  ] ++ applications;
 }

kubenix-modules/bind9/default.nix

@@ -51,11 +51,12 @@ in
           metadata.labels.app = "bind9";
 
           spec = {
-            containers.bind9 = {
+            containers = {
+              bind9-udp = {
                 image = "ubuntu/bind9:9.18-22.04_beta";
                 envFrom = [{ configMapRef.name = "bind9-env"; }];
 
-              ports.dns = {
+                ports.dns-udp = {
                   containerPort = 53;
                   protocol = "UDP";
                 };
@@ -74,6 +75,30 @@ in
                 ];
               };
 
+              bind9-tcp = {
+                image = "ubuntu/bind9:9.18-22.04_beta";
+                envFrom = [{ configMapRef.name = "bind9-env"; }];
+
+                ports.dns-tcp = {
+                  containerPort = 53;
+                  protocol = "TCP";
+                };
+
+                volumeMounts = [
+                  {
+                    name = "config";
+                    mountPath = "/etc/bind/named.conf";
+                    subPath = "config";
+                  }
+                  {
+                    name = "config";
+                    mountPath = "/etc/bind/kun.is.zone";
+                    subPath = "kunis-zone";
+                  }
+                ];
+              };
+            };
+
             volumes = [{
               name = "config";
               configMap.name = "bind9-config";
@@ -83,16 +108,46 @@ in
       };
     };
 
-    services.bind9.spec = {
+    services = {
+      bind9-udp = {
+        metadata.annotations = {
+          "metallb.universe.tf/loadBalancerIPs" = "${myLib.globals.bind9IPv4},${myLib.globals.bind9Ipv6}";
+          "metallb.universe.tf/allow-shared-ip" = "dns";
+        };
+
+        spec = {
           type = "LoadBalancer";
-      loadBalancerIP = myLib.globals.bind9IPv4;
           selector.app = "bind9";
+          ipFamilies = [ "IPv4" "IPv6" ];
+          ipFamilyPolicy = "RequireDualStack";
 
           ports.dns = {
             port = 53;
-        targetPort = "dns";
+            targetPort = "dns-udp";
             protocol = "UDP";
           };
         };
       };
+
+      bind9-tcp = {
+        metadata.annotations = {
+          "metallb.universe.tf/loadBalancerIPs" = "${myLib.globals.bind9IPv4},${myLib.globals.bind9Ipv6}";
+          "metallb.universe.tf/allow-shared-ip" = "dns";
+        };
+
+        spec = {
+          type = "LoadBalancer";
+          selector.app = "bind9";
+          ipFamilies = [ "IPv4" "IPv6" ];
+          ipFamilyPolicy = "RequireDualStack";
+
+          ports.dns = {
+            port = 53;
+            targetPort = "dns-tcp";
+            protocol = "TCP";
+          };
+        };
+      };
+    };
+  };
 }

kubenix-modules/bind9/kun.is.zone.nix

@@ -3,8 +3,8 @@ myLib: dns: with dns.lib.combinators; {
 
   SOA = {
     nameServer = "ns1";
-    adminEmail = "webmaster@kun.is";
-    serial = 2024041300;
+    adminEmail = "webmaster.kun.is";
+    serial = 2024041301;
   };
 
   NS = [
@@ -23,7 +23,7 @@ myLib: dns: with dns.lib.combinators; {
   subdomains = rec {
     "*".A = [ myLib.globals.routerPublicIPv4 ];
 
-    ns.A = [ myLib.globals.routerPublicIPv4 ];
+    ns = host myLib.globals.routerPublicIPv4 myLib.globals.bind9Ipv6;
     ns1 = ns;
     ns2 = ns;
 

kubenix-modules/metallb.nix

@@ -1,7 +1,7 @@
 # TODO: These resources should probably exist within the kube-system namespace.
 {
   kubernetes.resources = {
-    ipAddressPools.main.spec.addresses = [ "192.168.30.128-192.168.30.200" ];
+    ipAddressPools.main.spec.addresses = [ "192.168.30.128-192.168.30.200" "2a0d:6e00:1a77:30::2-2a0d:6e00:1a77:30:ffff:ffff:ffff:fffe" ];
     l2Advertisements.main.metadata = { };
   };
 }

machines/atlas.nix

@@ -10,6 +10,7 @@
 
       k3s = {
         enable = true;
+        role = "agent";
         serverAddr = "https://jefke.dmz:6443";
       };
     };

machines/jefke.nix

@@ -8,7 +8,10 @@
         dataPartition = "/dev/nvme0n1p1";
       };
 
-      k3s.enable = true;
+      k3s = {
+        enable = true;
+        clusterInit = true;
+      };
     };
   };
 }

my-lib/globals.nix

@@ -4,6 +4,7 @@
   minecraftIPv4 = "192.168.30.136";
   dnsmasqIPv4 = "192.168.30.135";
   bind9IPv4 = "192.168.30.134";
+  bind9Ipv6 = "2a0d:6e00:1a77:30::134";
   bittorrentIPv4 = "192.168.30.133";
   gitIPv4 = "192.168.30.132";
   piholeIPv4 = "192.168.30.131";

nixos-modules/k3s/default.nix

@@ -10,6 +10,22 @@ in {
       '';
     };
 
+    role = lib.mkOption {
+      default = "server";
+      type = lib.types.str;
+      description = ''
+        Whether to run k3s as a server or an agent.
+      '';
+    };
+
+    clusterInit = lib.mkOption {
+      default = false;
+      type = lib.types.bool;
+      description = ''
+        Whether this node should initialize the K8s cluster.
+      '';
+    };
+
     serverAddr = lib.mkOption {
       default = null;
       type = with lib.types; nullOr str;
@@ -28,17 +44,22 @@ in {
       firewall.enable = lib.mkForce false;
     };
 
-    services.k3s = {
+    services.k3s =
+      let
+        serverFlags = "--tls-san ${config.networking.fqdn} --disable servicelb --cluster-cidr=10.42.0.0/16,2001:cafe:42::/56 --service-cidr=10.43.0.0/16,2001:cafe:43::/112";
+      in
+      {
         enable = true;
-      role = "server";
+        role = cfg.role;
         tokenFile = config.age.secrets.k3s-server-token.path;
-      extraFlags = "--tls-san ${config.networking.fqdn} --disable servicelb";
-      clusterInit = cfg.serverAddr == null;
+        extraFlags = lib.mkIf (cfg.role == "server") serverFlags;
+        clusterInit = cfg.clusterInit;
         serverAddr = lib.mkIf (! (cfg.serverAddr == null)) cfg.serverAddr;
       };
 
-    system = lib.mkIf (cfg.serverAddr == null) {
-      activationScripts.k3s-bootstrap.text = (
+    system = lib.mkIf (cfg.role == "server") {
+      activationScripts = {
+        k3s-bootstrap.text = (
           let
             k3sBootstrapFile = (kubenix.evalModules.x86_64-linux {
               module = import ./bootstrap.nix;
@@ -49,8 +70,50 @@ in {
             ln -sf ${k3sBootstrapFile} /var/lib/rancher/k3s/server/manifests/k3s-bootstrap.json
           ''
         );
+
+        k3s-certs.text = ''
+          mkdir -p /var/lib/rancher/k3s/server/tls/etcd
+          ln -sf ${./k3s-ca/server-ca.crt} /var/lib/rancher/k3s/server/tls/server-ca.crt
+          ln -sf ${./k3s-ca/client-ca.crt} /var/lib/rancher/k3s/server/tls/client-ca.crt
+          ln -sf ${./k3s-ca/request-header-ca.crt} /var/lib/rancher/k3s/server/tls/request-header-ca.crt
+          ln -sf ${./k3s-ca/etcd/peer-ca.crt} /var/lib/rancher/k3s/server/tls/etcd/peer-ca.crt
+          ln -sf ${./k3s-ca/etcd/server-ca.crt} /var/lib/rancher/k3s/server/tls/etcd/server-ca.crt
+        '';
+      };
     };
 
-    age.secrets.k3s-server-token.file = ../../secrets/k3s-server-token.age;
+    age.secrets = {
+      k3s-server-token.file = ../../secrets/k3s-server-token.age;
+
+      k3s-server-ca-key = lib.mkIf (cfg.role == "server") {
+        file = ../../secrets/k3s-ca/server-ca.key.age;
+        path = "/var/lib/rancher/k3s/server/tls/server-ca.key";
+      };
+
+      k3s-client-ca-key = lib.mkIf (cfg.role == "server") {
+        file = ../../secrets/k3s-ca/client-ca.key.age;
+        path = "/var/lib/rancher/k3s/server/tls/client-ca.key";
+      };
+
+      k3s-request-header-ca-key = lib.mkIf (cfg.role == "server") {
+        file = ../../secrets/k3s-ca/request-header-ca.key.age;
+        path = "/var/lib/rancher/k3s/server/tls/request-header-ca.key";
+      };
+
+      k3s-etcd-peer-ca-key = lib.mkIf (cfg.role == "server") {
+        file = ../../secrets/k3s-ca/etcd/peer-ca.key.age;
+        path = "/var/lib/rancher/k3s/server/tls/etcd/peer-ca.key";
+      };
+
+      k3s-etcd-server-ca-key = lib.mkIf (cfg.role == "server") {
+        file = ../../secrets/k3s-ca/etcd/server-ca.key.age;
+        path = "/var/lib/rancher/k3s/server/tls/etcd/server-ca.key";
+      };
+
+      k3s-service-key = lib.mkIf (cfg.role == "server") {
+        file = ../../secrets/k3s-ca/service.key.age;
+        path = "/var/lib/rancher/k3s/server/tls/service.key";
+      };
+    };
   };
 }

nixos-modules/k3s/k3s-ca/client-ca.crt

@@ -0,0 +1,81 @@
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nixos-modules/k3s/k3s-ca/etcd/peer-ca.crt

@@ -0,0 +1,81 @@
+-----BEGIN CERTIFICATE-----
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----

nixos-modules/k3s/k3s-ca/server-ca.crt

@@ -0,0 +1,81 @@
+-----BEGIN CERTIFICATE-----
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----

secrets/k3s-ca/etcd/peer-ca.key.age

@@ -0,0 +1,17 @@
+age-encryption.org/v1
+-> ssh-ed25519 UwNSRQ 7VPm9hUzbKELjQBUfKKinUdOAUbNzY2pZp9ihry9sFU
+ZPkr54gFnXE9b80OKX9NPk4DWmyRTKkcJH0C+6lLJZE
+-> ssh-ed25519 JJ7S4A 2TVdz1v5NBqCfPD3LzUdQsQ3ubsdJGSHwVKjj7NNpxE
+uO4sRxj8RVqUQXRDlT0ZI4LxFx9MHaAWMrf9WYOZIas
+-> ssh-ed25519 aqswPA V+3scofJU1OnxJI9+ryPixGiD3Z1srePETEzUZ4zfAY
+QoKHxyKr5XXxgJJeoJycShOqHowt/OkaYJOm8nXXeM8
+-> ssh-ed25519 LAPUww V919z6/H/pC5smjiq1d8/7Q+QvbXcbfRKAfjiBugoSw
+9urrVRscuLY6cKsfZKBdVcDdpPfex8sDHuEdH/EtujU
+-> ssh-ed25519 vBZj5g v7Pkzi9F2fc9++OsVfou2j60R2iq1ZfOCr/SfFVIvkQ
+bknegfUOmc1G8PDcskOCS88OGa60B3t4R2ty7Rdt/mM
+-> ssh-ed25519 QP0PgA psOkHWvCkdQOpPHYJ/dpDZ/TlZhArARHT9PzsXLV9WU
+EHfX0VdHJdm/0iqRfkYxmqmSqrwwgb3irBhDZPvjl3M
+--- ekq08T+kFXk/v4//f8xSvqdumAFxd0jMnzUqMn180hs
+¬Í‹»ô¬ó‘Ø*€}²`0ÿà"¿,¶[‰Ýv“·buG_pý†\˜º­a—#$gçÞVqüÎöµ3¤/ÍÅò¹PÊ3“nô±û’…øŒÔ@¢÷…¾Bo;CmKp³<70>Α-ñÛ#,¦
òÇI2_c”ݲÊ<C2B2>TᇀŽŒ¹Îdéƒ-`çáíç!“úýpƒÆÇ!“}Þ_a³Øe¤"?Tùjºèj<C3A8>Ü©]¶É”"´“Ú&¶"L3~=ùèc8º½C
í,1ܽm B²Üùt
++DÎ÷ŽFà\Ã}I>÷"=Þal£Ör
+C<1F>ø÷ŒUÏ+døÞÀÁvó•

secrets/k3s-ca/etcd/server-ca.key.age

@@ -0,0 +1,16 @@
+age-encryption.org/v1
+-> ssh-ed25519 UwNSRQ W6uEvGJIdlkC0or4dyFcK+ytKeEiwIJB1bebPLTERDA
+uzMxRth4KMhqsQYhw2tWyqBeQdCbTgbBegHrkcuHI9o
+-> ssh-ed25519 JJ7S4A bw+MlxnWLuLecMuqMTrJl2TMXyXhqEWCpKFwsPgkgnw
+zwWm3Fq9Q+mR+9rVaSzVO3i7qgPgWsv25ClCW1c0G8M
+-> ssh-ed25519 aqswPA ZIgGWu33QpKdUfPtlIHs9BeCurnk6pm+2XLi53RBFwc
+wN8Qmo9CCqVTa+y6zcYiZYbslgTOtVMUjCCUVT0W7WA
+-> ssh-ed25519 LAPUww npNhPTPq8kfN2vgouVJZ5NXARHBD02L1CJHmas4ilAI
+nTpXsq5BgfikRJUglFGjP9GoRIswyHZp6R7KxZhH/uc
+-> ssh-ed25519 vBZj5g JOUeBxwM5Qcz/YoeYCPM9dmkWp130Ze0E2n8qdsQzzo
+1SL0HH+u48cDojytjSxRHXKo1sgil7EZYBLpQAOuzPI
+-> ssh-ed25519 QP0PgA /bQtDDcVg8DzFdgFkEDPzBTD02OYTC2Pe+WuEmP9j2A
+IRUPa8tityX/FVKJKpcKWMtVvwRzFWueuvBIhlqcSv0
+--- DltN2dAJoEDuU6Ub6J7BZY84TjZfHGVN9P2SnoHrE7Q
+ Ñq–\þê!j>ƒ	›Ï	â3ŒÓ÷ô+Ã4<—Ç
+¡·7„aÈdb¥†äÑ‚	®î_ŸÒ.ä±cë(>5ª-þð3ŒjwE¬ô½xHh;µšê,hK*ȼ›Æßmì‚bôÁ*ª¨ª»€]MmÏw½~Îg{ʼn¸û°Œß€ZrVk²fRXðGÆ%Œ‚Õê1^?ƒÃY@1Ú<31>šÇ<ãv°ïZ_`ø›1ÖðscÙ/d½ž‘ÃÍ$óÕ\wR…±ñ}éÈSÓ>ƒ¨Ô7Ë*0«Ý߈d¸é”Â…¥2߯šURô«G~:^X㎋5¬òc8\¹t÷çÌ!ò”ƒ,Óª•Ò

secrets/secrets.nix

@@ -12,6 +12,12 @@ let
     "borg_passphrase.age"
     "borgbase.pem.age"
     "k3s-server-token.age"
+    "k3s-ca/server-ca.key.age"
+    "k3s-ca/client-ca.key.age"
+    "k3s-ca/request-header-ca.key.age"
+    "k3s-ca/etcd/peer-ca.key.age"
+    "k3s-ca/etcd/server-ca.key.age"
+    "k3s-ca/service.key.age"
   ];
 
   machinePublicKeys = [