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