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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.amazonImage;
in {
imports = [ ../../../modules/virtualisation/amazon-image.nix ];
# Amazon recomments setting this to the highest possible value for a good EBS
# experience, which prior to 4.15 was 255.
# https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/nvme-ebs-volumes.html#timeout-nvme-ebs-volumes
config.boot.kernelParams =
let timeout =
if pkgs.lib.versionAtLeast config.boot.kernelPackages.kernel.version "4.15"
then "4294967295"
else "255";
in [ "nvme_core.io_timeout=${timeout}" ];
options.amazonImage = {
name = mkOption {
type = types.str;
description = "The name of the generated derivation";
default = "nixos-amazon-image-${config.system.nixos.label}-${pkgs.stdenv.hostPlatform.system}";
};
contents = mkOption {
example = literalExample ''
[ { source = pkgs.memtest86 + "/memtest.bin";
target = "boot/memtest.bin";
}
]
'';
default = [];
description = ''
This option lists files to be copied to fixed locations in the
generated image. Glob patterns work.
'';
};
sizeMB = mkOption {
type = with types; either (enum [ "auto" ]) int;
default = if config.ec2.hvm then 2048 else 8192;
example = 8192;
description = "The size in MB of the image";
};
format = mkOption {
type = types.enum [ "raw" "qcow2" "vpc" ];
default = "vpc";
description = "The image format to output";
};
};
config.system.build.amazonImage = import ../../../lib/make-disk-image.nix {
inherit lib config;
inherit (cfg) contents format name;
pkgs = import ../../../.. { inherit (pkgs) system; }; # ensure we use the regular qemu-kvm package
partitionTableType = if config.ec2.efi then "efi"
else if config.ec2.hvm then "legacy+gpt"
else "none";
diskSize = cfg.sizeMB;
fsType = "ext4";
configFile = pkgs.writeText "configuration.nix"
''
{ modulesPath, ... }: {
imports = [ "''${modulesPath}/virtualisation/amazon-image.nix" ];
${optionalString config.ec2.hvm ''
ec2.hvm = true;
''}
${optionalString config.ec2.efi ''
ec2.efi = true;
''}
}
'';
postVM = ''
extension=''${diskImage##*.}
friendlyName=$out/${cfg.name}.$extension
mv "$diskImage" "$friendlyName"
diskImage=$friendlyName
mkdir -p $out/nix-support
echo "file ${cfg.format} $diskImage" >> $out/nix-support/hydra-build-products
${pkgs.jq}/bin/jq -n \
--arg label ${lib.escapeShellArg config.system.nixos.label} \
--arg system ${lib.escapeShellArg pkgs.stdenv.hostPlatform.system} \
--arg logical_bytes "$(${pkgs.qemu}/bin/qemu-img info --output json "$diskImage" | ${pkgs.jq}/bin/jq '."virtual-size"')" \
--arg file "$diskImage" \
'$ARGS.named' \
> $out/nix-support/image-info.json
'';
};
}