Merge pull request #129449 from ddz/copy-initrd-secrets-after-early-mount-script

nixos/stage1: copy initrd secrets into place after special mounts

nixos/modules/system/boot/stage-1-init.sh

@@ -119,6 +119,18 @@ specialMount() {
 }
 source @earlyMountScript@
 
+# Copy initrd secrets from /.initrd-secrets to their actual destinations
+if [ -d "/.initrd-secrets" ]; then
+    #
+    # Secrets are named by their full destination pathname and stored
+    # under /.initrd-secrets/
+    #
+    for secret in $(cd "/.initrd-secrets"; find . -type f); do
+        mkdir -p $(dirname "/$secret")
+        cp "/.initrd-secrets/$secret" "$secret"
+    done
+fi
+
 # Log the script output to /dev/kmsg or /run/log/stage-1-init.log.
 mkdir -p /tmp
 mkfifo /tmp/stage-1-init.log.fifo

nixos/modules/system/boot/stage-1.nix

@@ -411,8 +411,8 @@ let
         ${lib.concatStringsSep "\n" (mapAttrsToList (dest: source:
             let source' = if source == null then dest else toString source; in
               ''
-                mkdir -p $(dirname "$tmp/${dest}")
-                cp -a ${source'} "$tmp/${dest}"
+                mkdir -p $(dirname "$tmp/.initrd-secrets/${dest}")
+                cp -a ${source'} "$tmp/.initrd-secrets/${dest}"
               ''
           ) config.boot.initrd.secrets)
          }

nixos/tests/initrd-secrets.nix

@@ -13,7 +13,12 @@ let
 
     machine = { ... }: {
       virtualisation.useBootLoader = true;
-      boot.initrd.secrets."/test" = secretInStore;
+      boot.initrd.secrets = {
+        "/test" = secretInStore;
+
+        # This should *not* need to be copied in postMountCommands
+        "/run/keys/test" = secretInStore;
+      };
       boot.initrd.postMountCommands = ''
         cp /test /mnt-root/secret-from-initramfs
       '';
@@ -26,7 +31,8 @@ let
       start_all()
       machine.wait_for_unit("multi-user.target")
       machine.succeed(
-          "cmp ${secretInStore} /secret-from-initramfs"
+          "cmp ${secretInStore} /secret-from-initramfs",
+          "cmp ${secretInStore} /run/keys/test",
       )
     '';
   };