From 590acc193c1d823d99ca216f19fbbb9588f8c3ef Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Wed, 20 Jan 2010 18:10:02 +0000
Subject: [PATCH] * A module for generating a disk image suitable for use with
 Amazon's   Elastic Compute Cloud (EC2).  TODO: run ec2-bundle-image here.

svn path=/nixos/trunk/; revision=19580
---
 modules/virtualisation/amazon-image.nix | 43 +++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 modules/virtualisation/amazon-image.nix

diff --git a/modules/virtualisation/amazon-image.nix b/modules/virtualisation/amazon-image.nix
new file mode 100644
index 000000000000..e834b392c6fa
--- /dev/null
+++ b/modules/virtualisation/amazon-image.nix
@@ -0,0 +1,43 @@
+{ config, pkgs, ... }:
+
+with pkgs.lib;
+
+{
+  system.build.ext2Image =
+    pkgs.vmTools.runInLinuxVM (
+      pkgs.runCommand "amazon-image"
+        { preVM =
+            ''
+              mkdir $out
+              diskImage=$out/nixos.img
+              qemu-img create -f raw $diskImage "1024M"
+            '';
+          buildInputs = [ pkgs.utillinux pkgs.perl pkgs.rsync ];
+          exportReferencesGraph = 
+            [ "closure" config.system.build.toplevel ];
+        }
+        ''
+          # Create an empty filesysten and mount it.
+          ${pkgs.e2fsprogs}/sbin/mkfs.ext3 /dev/vda
+          mkdir /mnt
+          mount /dev/vda /mnt
+
+          # Copy all paths in the closure to the filesystem.
+          storePaths=$(perl ${pkgs.pathsFromGraph} $ORIG_TMPDIR/closure)
+
+          mkdir -p /mnt/nix/store
+          rsync -av $storePaths /mnt/nix/store/
+
+          # Amazon assumes that there is a /sbin/init, so symlink it
+          # to the stage 2 init script.  Since we cannot set the path
+          # to the system configuration via the systemConfig kernel
+          # parameter, use a /system symlink.
+          mkdir -p /mnt/sbin
+          ln -s ${config.system.build.bootStage2} /mnt/sbin/init
+          ln -s ${config.system.build.toplevel} /mnt/system
+
+          umount /mnt
+        ''
+    );
+
+}