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129176452c
NixOS 20.03 is built on kernel 5.4 and 19.09 is on 4.19, so we should update this option to the highest value possible, per linked upstream instructions from Amazon.
95 lines
2.9 KiB
Nix
95 lines
2.9 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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{
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imports = [ <nixpkgs/nixos/modules/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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