fix(dns): dnsimple expects FQDNs in CNAMEs

DNSimple doesn't appear to follow the typical behaviour of appending the
domain unless the CNAME is terminated with `.`

To avoid further problems, let's just explicilty use the FQDN for all
CNAMEs.

https://support.dnsimple.com/articles/cname-record/

For comparison:
```
;; ANSWER SECTION:
alerts.forkos.org.	300	IN	CNAME	meta01.infra.p.
```

```
;; ANSWER SECTION:
alerts.forkos.org.	181	IN	CNAME	meta01.infra.p.forkos.org.
meta01.infra.p.forkos.org. 181	IN	A	163.172.69.160
```

services/baremetal-builder/default.nix

@@ -135,7 +135,7 @@ in
       { address = "2a01:584:11::1:${toString cfg.num}"; prefixLength = 64; }
     ];
     networking.defaultGateway6 = { interface = "uplink"; address = "2a01:584:11::1"; };
-    deployment.targetHost = lib.mkIf (!cfg.netboot) "2a01:584:11::1:${toString cfg.num}";
+    deployment.targetHost = "2a01:584:11::1:${toString cfg.num}";
     deployment.tags = [ "builders" ];
 
     # Why can't we have nice things? https://bugs.openjdk.org/browse/JDK-8170568

services/baremetal-builder/netboot.nix

@@ -21,22 +21,13 @@ in
       '';
     };
 
-    # machines with the netboot module enabled should only be updated by appliying wob-vpn-gw and rebooting
-    deployment.targetHost = "invalid.example.com";
-    # fixes initrd eval warning, and allows `colmena build` to succed
-    fileSystems."/" = {
-      device = "none";
-      fsType = "tmpfs";
-      options = [ "defaults" "size=64G" "mode=755" ];
-    };
-
     system.build = {
 
       # Build a kernel and initramfs which will download the IPXE script from hydra using
       # u-root pxeboot tool and kexec into the final netbooted system.
       notipxe = import (modulesPath + "/..") {
         system = "x86_64-linux";
-        configuration =
+        configuration = 
           { pkgs, config, ... }:
 
           {
@@ -66,7 +57,7 @@ in
               script = ''
                 ln -sf /dev/console /dev/tty
                 until ${pkgs.iputils}/bin/ping -c 1 hydra.forkos.org; do sleep 1; done
-                ${pkgs.u-root}/bin/pxeboot -v -ipv4=false -file https://hydra.forkos.org/job/infra/main/${node.config.networking.hostName}/latest/download-by-type/file/ipxe
+                ${pkgs.u-root}/bin/pxeboot -v -ipv4=false -file https://hydra.forkos.org/job/infra/main/${node.config.networking.hostName}/latest/download-by-type/file/ipxe 
               '';
             };
             boot.initrd.systemd.contents."/etc/ssl/certs/ca-certificates.crt".source = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt";

terraform/dnsimple.nix

@@ -45,5 +45,103 @@ in
     resource.dnsimple_zone.vzfdfp_de = {
       name = "vzfdfp.de";
     };
+
+    resource.dnsimple_zone_record = let
+      # https://registry.terraform.io/providers/dnsimple/dnsimple/latest/docs/resources/zone_record
+      canonicalName = zoneName: record: let
+        # TODO: make less fragile and have actual unique and stable names
+        normalize = builtins.replaceStrings ["." "@"] ["_" "_root_"];
+        zone = normalize zoneName;
+        name = normalize record.name;
+      in "${zone}_${record.type}_${name}";
+
+      record = name: ttl: type: value: {
+        inherit name ttl type value;
+      };
+
+      proxyRecords = name: ttl: type: value: [
+        # kurisu.lahfa.xyz running a sniproxy:
+        (record name ttl "A" "163.172.69.160")
+        (record name ttl type value)
+      ];
+
+      # Creates a extra *.p record pointing to the sniproxy
+      dualProxyRecords = name: ttl: type: value: lib.flatten [
+        (record name ttl type value)
+        (proxyRecords "${name}.p" ttl type value)
+      ];
+
+      domain = zoneName: records:
+        builtins.listToAttrs (map (record: {
+          name = canonicalName zoneName record;
+          value = record // {
+            zone_name = zoneName;
+          };
+        }
+      ) (lib.flatten records));
+      zones = domains: lib.zipAttrs (lib.mapAttrsToList (zoneName: records: domain zoneName records) domains);
+    in zones {
+        "forkos.org" = ([
+          # (record "@" 300 "A" "163.172.69.160")
+          (record "@" 300 "AAAA" "2001:bc8:38ee:100:1000::20")
+
+          (dualProxyRecords "bagel-box.infra" 300 "AAAA" "2001:bc8:38ee:100:100::1")
+          (dualProxyRecords "gerrit01.infra" 300 "AAAA" "2001:bc8:38ee:100:1000::10")
+          (dualProxyRecords "meta01.infra" 300 "AAAA" "2001:bc8:38ee:100:1000::20")
+          (dualProxyRecords "fodwatch.infra" 300 "AAAA" "2001:bc8:38ee:100:1000::30")
+          # git.infra.forkos.org exposes opensshd
+          (dualProxyRecords "git.infra" 300 "AAAA" "2001:bc8:38ee:100:1000::41")
+          # git.p.forkos.org exposes forgejo ssh server.
+          (proxyRecords "git.p" 300 "AAAA" "2001:bc8:38ee:100:1000::40")
+          (dualProxyRecords "buildbot.infra" 300 "AAAA" "2001:bc8:38ee:100:1000::50")
+          (dualProxyRecords "public01.infra" 300 "AAAA" "2001:bc8:38ee:100:1000::60")
+
+          (record "cl" 300 "CNAME" "gerrit01.infra.p.forkos.org")
+          (record "fodwatch" 300 "CNAME" "fodwatch.infra.p.forkos.org")
+          # git.p.forkos.org is the proxy variant of the Forgejo server.
+          (record "git" 300 "CNAME" "git.p.forkos.org")
+          (record "netbox" 300 "CNAME" "meta01.infra.p.forkos.org")
+          (record "amqp" 300 "CNAME" "bagel-box.infra.p.forkos.org")
+          (record "grafana" 300 "CNAME" "meta01.infra.p.forkos.org")
+          (record "hydra" 300 "CNAME" "build-coord.wob01.infra.p.forkos.org")
+          (record "loki" 300 "CNAME" "meta01.infra.p.forkos.org")
+          (record "mimir" 300 "CNAME" "meta01.infra.p.forkos.org")
+          (record "pyroscope" 300 "CNAME" "meta01.infra.p.forkos.org")
+          (record "tempo" 300 "CNAME" "meta01.infra.p.forkos.org")
+          (record "matrix" 300 "CNAME" "meta01.infra.p.forkos.org")
+          (record "alerts" 300 "CNAME" "meta01.infra.p.forkos.org")
+          (record "buildbot" 300 "CNAME" "buildbot.infra.p.forkos.org")
+          (record "b" 300 "CNAME" "public01.infra.p.forkos.org")
+          (record "postgres" 300 "CNAME" "bagel-box.infra.p.forkos.org")
+          (record "news" 3600 "CNAME" "public01.infra.p.forkos.org")
+
+          # S3 in delroth's basement
+          (record "cache" 300 "AAAA" "2a02:168:6426::12") # smol.delroth.net
+          (record "cache" 300 "A" "195.39.247.161") # sni proxy
+
+          (record "vpn-gw.wob01.infra" 300 "AAAA" "2a01:584:11::2")
+
+          (dualProxyRecords "build-coord.wob01.infra" 300 "AAAA" "2a01:584:11::1:11")
+          # TODO: do not hardcode, just reuse the Colmena hive module outputs to generate all the required details.
+        ]
+        ++ (map (index: record "builder-${toString index}.wob01.infra" 300 "AAAA" "2a01:584:11::1:${toString index}") (genList lib.id 11))
+        ++ (
+          let
+            # FIXME: figure out a way to poke `config.services.s3-revproxy` and
+            # automate the DNS part away?
+            buckets = [
+              "channels"
+              "releases"
+              "channel-scripts-test"
+            ];
+          in
+          map (bucket: record "${bucket}" 300 "CNAME" "public01.infra.p.forkos.org") buckets
+        ));
+        "flowery.systems" = [
+          (record "" 300 "ALIAS" "news.forkos.org")
+        ];
+        "vzfdfp.de" = [
+        ];
+    };
   };
 }