nova-image: use wget instead of cloud-init (via EC2 API)

The Openstack metadata service exposes the EC2 API. We use the
existing `ec2.nix` module to configure the hostname and ssh keys of an
Openstack Instance.

A test checks the ssh server is well configured.

This is mainly to reduce the size of the image (700MB). Also,
declarative features provided by cloud-init are not really useful
since we would prefer to use our `configuration.nix` file instead.

1 files changed, 4 insertions, 56 deletions

diff --git a/nixos/tests/ec2.nix b/nixos/tests/ec2.nix
index ed6bf7da988c..db959a63e40f 100644
--- a/nixos/tests/ec2.nix
+++ b/nixos/tests/ec2.nix
@@ -6,6 +6,8 @@
 with import ../lib/testing.nix { inherit system pkgs; };
 with pkgs.lib;
 
+with import common/ec2.nix { inherit makeTest pkgs; };
+
 let
   image =
     (import ../lib/eval-config.nix {
@@ -39,65 +41,10 @@ let
       ];
     }).config.system.build.amazonImage;
 
-  makeEc2Test = { name, userData, script, hostname ? "ec2-instance", sshPublicKey ? null }:
-    let
-      metaData = pkgs.stdenv.mkDerivation {
-        name = "metadata";
-        buildCommand = ''
-          mkdir -p $out/1.0/meta-data
-          ln -s ${pkgs.writeText "userData" userData} $out/1.0/user-data
-          echo "${hostname}" > $out/1.0/meta-data/hostname
-          echo "(unknown)" > $out/1.0/meta-data/ami-manifest-path
-        '' + optionalString (sshPublicKey != null) ''
-          mkdir -p $out/1.0/meta-data/public-keys/0
-          ln -s ${pkgs.writeText "sshPublicKey" sshPublicKey} $out/1.0/meta-data/public-keys/0/openssh-key
-        '';
-      };
-    in makeTest {
-      name = "ec2-" + name;
-      nodes = {};
-      testScript =
-        ''
-          my $imageDir = ($ENV{'TMPDIR'} // "/tmp") . "/vm-state-machine";
-          mkdir $imageDir, 0700;
-          my $diskImage = "$imageDir/machine.qcow2";
-          system("qemu-img create -f qcow2 -o backing_file=${image}/nixos.qcow2 $diskImage") == 0 or die;
-          system("qemu-img resize $diskImage 10G") == 0 or die;
-
-          # Note: we use net=169.0.0.0/8 rather than
-          # net=169.254.0.0/16 to prevent dhcpcd from getting horribly
-          # confused. (It would get a DHCP lease in the 169.254.*
-          # range, which it would then configure and prompty delete
-          # again when it deletes link-local addresses.) Ideally we'd
-          # turn off the DHCP server, but qemu does not have an option
-          # to do that.
-          my $startCommand = "qemu-kvm -m 768";
-          $startCommand .= " -device virtio-net-pci,netdev=vlan0";
-          $startCommand .= " -netdev 'user,id=vlan0,net=169.0.0.0/8,guestfwd=tcp:169.254.169.254:80-cmd:${pkgs.micro-httpd}/bin/micro_httpd ${metaData}'";
-          $startCommand .= " -drive file=$diskImage,if=virtio,werror=report";
-          $startCommand .= " \$QEMU_OPTS";
-
-          my $machine = createMachine({ startCommand => $startCommand });
-
-          ${script}
-        '';
-    };
-
-  snakeOilPrivateKey = ''
-    -----BEGIN OPENSSH PRIVATE KEY-----
-    b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
-    QyNTUxOQAAACDEPmwZv5dDPrMUaq0dDP+6eBTTe+QNrz14KBEIdhHd1QAAAJDufJ4S7nye
-    EgAAAAtzc2gtZWQyNTUxOQAAACDEPmwZv5dDPrMUaq0dDP+6eBTTe+QNrz14KBEIdhHd1Q
-    AAAECgwbDlYATM5/jypuptb0GF/+zWZcJfoVIFBG3LQeRyGsQ+bBm/l0M+sxRqrR0M/7p4
-    FNN75A2vPXgoEQh2Ed3VAAAADEVDMiB0ZXN0IGtleQE=
-    -----END OPENSSH PRIVATE KEY-----
-  '';
-
-  snakeOilPublicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMQ+bBm/l0M+sxRqrR0M/7p4FNN75A2vPXgoEQh2Ed3V EC2 test key";
-
 in {
   boot-ec2-nixops = makeEc2Test {
     name         = "nixops-userdata";
+    inherit image;
     sshPublicKey = snakeOilPublicKey; # That's right folks! My user's key is also the host key!
 
     userData = ''
@@ -142,6 +89,7 @@ in {
 
   boot-ec2-config = makeEc2Test {
     name         = "config-userdata";
+    inherit image;
     sshPublicKey = snakeOilPublicKey;
 
     # ### http://nixos.org/channels/nixos-unstable nixos