From ddcc8c65e30a9ca3b56e25466e749cb100b28510 Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Sat, 22 Oct 2022 19:33:45 +0200
Subject: ...

---
 installer-profiles/nfsroot.nix | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

(limited to 'installer-profiles')

diff --git a/installer-profiles/nfsroot.nix b/installer-profiles/nfsroot.nix
index 9db415a8..2688a8d0 100644
--- a/installer-profiles/nfsroot.nix
+++ b/installer-profiles/nfsroot.nix
@@ -16,7 +16,17 @@ in {
     nfsroot = {
       storeDevice = mkOption {
         type = types.str;
+        default = "nfsroot:nix-store";
       };
+
+      registrationUrl = mkOption {
+        type = types.str;
+        default = "http://nfsroot/nix-registration";
+      };
+    };
+
+    system.build = {
+      storeContents = mkOption {};
     };
   };
 
@@ -67,14 +77,26 @@ in {
         ];
       };
 
+    nix.extraOptions = ''
+      use-sqlite-wal = false
+    '';
+
     boot.initrd.availableKernelModules = [ "nfs" "nfsv4" "overlay" ];
     boot.initrd.supportedFilesystems = [ "nfs" "nfsv4" "overlay" ];
+    services.rpcbind.enable = mkImageMediaOverride false;
 
     boot.initrd.network.enable = true;
-    boot.initrd.network.flushBeforeStage2 = false; # otherwise nfs dosen't work
+    boot.initrd.network.flushBeforeStage2 = false; # otherwise nfs doesn't work
+    boot.initrd.postMountCommands = ''
+      mkdir -p /mnt-root/etc/
+      cp /etc/resolv.conf /mnt-root/etc/resolv.conf
+    '';
     networking.useDHCP = true;
+    networking.resolvconf.enable = false;
 
 
+    system.build.storeContents = [config.system.build.toplevel];
+
     system.build.netbootIpxeScript = pkgs.writeTextDir "netboot.ipxe" ''
       #!ipxe
       # Use the cmdline variable to allow the user to specify custom kernel params
@@ -86,6 +108,10 @@ in {
 
     boot.postBootCommands =
       ''
+        # After booting, register the contents of the Nix store on NFS
+        # in the Nix database in the tmpfs.
+        ${pkgs.curl}/bin/curl ${escapeShellArg cfg.registrationUrl} | ${config.nix.package.out}/bin/nix-store --load-db
+
         # nixos-rebuild also requires a "system" profile and an
         # /etc/NIXOS tag.
         touch /etc/NIXOS
-- 
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