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74 lines
2.5 KiB
Nix
74 lines
2.5 KiB
Nix
{ pkgs, makeTest }:
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with pkgs.lib;
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{
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makeEc2Test = { name, image, userData, script, hostname ? "ec2-instance", sshPublicKey ? null, meta ? {} }:
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let
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metaData = pkgs.stdenv.mkDerivation {
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name = "metadata";
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buildCommand = ''
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mkdir -p $out/1.0/meta-data
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ln -s ${pkgs.writeText "userData" userData} $out/1.0/user-data
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echo "${hostname}" > $out/1.0/meta-data/hostname
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echo "(unknown)" > $out/1.0/meta-data/ami-manifest-path
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'' + optionalString (sshPublicKey != null) ''
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mkdir -p $out/1.0/meta-data/public-keys/0
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ln -s ${pkgs.writeText "sshPublicKey" sshPublicKey} $out/1.0/meta-data/public-keys/0/openssh-key
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'';
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};
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indentLines = str: concatLines (map (s: " " + s) (splitString "\n" str));
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in makeTest {
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name = "ec2-" + name;
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nodes = {};
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testScript = ''
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import os
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import subprocess
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import tempfile
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image_dir = os.path.join(
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os.environ.get("TMPDIR", tempfile.gettempdir()), "tmp", "vm-state-machine"
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)
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os.makedirs(image_dir, mode=0o700, exist_ok=True)
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disk_image = os.path.join(image_dir, "machine.qcow2")
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subprocess.check_call(
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[
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"qemu-img",
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"create",
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"-f",
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"qcow2",
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"-F",
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"qcow2",
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"-o",
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"backing_file=${image}",
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disk_image,
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]
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)
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subprocess.check_call(["qemu-img", "resize", disk_image, "10G"])
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# Note: we use net=169.0.0.0/8 rather than
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# net=169.254.0.0/16 to prevent dhcpcd from getting horribly
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# confused. (It would get a DHCP lease in the 169.254.*
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# range, which it would then configure and promptly delete
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# again when it deletes link-local addresses.) Ideally we'd
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# turn off the DHCP server, but qemu does not have an option
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# to do that.
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start_command = (
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"qemu-kvm -m 1024"
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+ " -device virtio-net-pci,netdev=vlan0"
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+ " -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}'"
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+ f" -drive file={disk_image},if=virtio,werror=report"
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+ " $QEMU_OPTS"
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)
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machine = create_machine(start_command)
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try:
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'' + indentLines script + ''
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finally:
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machine.shutdown()
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'';
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inherit meta;
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};
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}
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