pyrox.dev
1{ pkgs, makeTest }:
2
3with pkgs.lib;
4
5{
6 makeEc2Test = { name, image, userData, script, hostname ? "ec2-instance", sshPublicKey ? null, meta ? {} }:
7 let
8 metaData = pkgs.stdenv.mkDerivation {
9 name = "metadata";
10 buildCommand = ''
11 mkdir -p $out/1.0/meta-data
12 ln -s ${pkgs.writeText "userData" userData} $out/1.0/user-data
13 echo "${hostname}" > $out/1.0/meta-data/hostname
14 echo "(unknown)" > $out/1.0/meta-data/ami-manifest-path
15 '' + optionalString (sshPublicKey != null) ''
16 mkdir -p $out/1.0/meta-data/public-keys/0
17 ln -s ${pkgs.writeText "sshPublicKey" sshPublicKey} $out/1.0/meta-data/public-keys/0/openssh-key
18 '';
19 };
20 in makeTest {
21 name = "ec2-" + name;
22 nodes = {};
23 testScript = ''
24 import os
25 import subprocess
26
27 image_dir = os.path.join(
28 os.environ.get("TMPDIR", tempfile.gettempdir()), "tmp", "vm-state-machine"
29 )
30 os.makedirs(image_dir, mode=0o700, exist_ok=True)
31 disk_image = os.path.join(image_dir, "machine.qcow2")
32 subprocess.check_call(
33 [
34 "qemu-img",
35 "create",
36 "-f",
37 "qcow2",
38 "-o",
39 "backing_file=${image}",
40 disk_image,
41 ]
42 )
43 subprocess.check_call(["qemu-img", "resize", disk_image, "10G"])
44
45 # Note: we use net=169.0.0.0/8 rather than
46 # net=169.254.0.0/16 to prevent dhcpcd from getting horribly
47 # confused. (It would get a DHCP lease in the 169.254.*
48 # range, which it would then configure and prompty delete
49 # again when it deletes link-local addresses.) Ideally we'd
50 # turn off the DHCP server, but qemu does not have an option
51 # to do that.
52 start_command = (
53 "qemu-kvm -m 1024"
54 + " -device virtio-net-pci,netdev=vlan0"
55 + " -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}'"
56 + f" -drive file={disk_image},if=virtio,werror=report"
57 + " $QEMU_OPTS"
58 )
59
60 machine = create_machine({"startCommand": start_command})
61 '' + script;
62
63 inherit meta;
64 };
65}