NixOS/amazonImageZfs: init
Introduce an AWS EC2 AMI which supports aarch64 and x86_64 with a ZFS root. This uses `make-zfs-image` which implies two EBS volumes are needed inside EC2, one for boot, one for root. It should not matter which is identified `xvda` and which is `xvdb`, though I have always uploaded `boot` as `xvda`.
This commit is contained in:
Graham Christensen
parent
076f6e2d94
commit
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12
nixos/maintainers/scripts/ec2/amazon-image-zfs.nix
Normal file
12
nixos/maintainers/scripts/ec2/amazon-image-zfs.nix
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@ -0,0 +1,12 @@
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{
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imports = [ ./amazon-image.nix ];
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ec2.zfs = {
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enable = true;
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datasets = {
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"tank/system/root".mount = "/";
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"tank/system/var".mount = "/var";
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"tank/local/nix".mount = "/nix";
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"tank/user/home".mount = "/home";
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};
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};
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}
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@ -4,6 +4,7 @@ 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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@ -53,15 +54,7 @@ in {
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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+gpt"
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else "none";
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diskSize = cfg.sizeMB;
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fsType = "ext4";
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config.system.build.amazonImage = let
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configFile = pkgs.writeText "configuration.nix"
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''
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{ modulesPath, ... }: {
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@ -72,8 +65,67 @@ in {
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${optionalString config.ec2.efi ''
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ec2.efi = true;
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''}
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${optionalString config.ec2.zfs.enable ''
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ec2.zfs.enable = true;
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networking.hostId = "${config.networking.hostId}";
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''}
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}
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'';
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zfsBuilder = import ../../../lib/make-zfs-image.nix {
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inherit lib config configFile;
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inherit (cfg) contents format name;
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pkgs = import ../../../.. { inherit (pkgs) system; }; # ensure we use the regular qemu-kvm package
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includeChannel = true;
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bootSize = 1000; # 1G is the minimum EBS volume
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rootSize = cfg.sizeMB;
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rootPoolProperties = {
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ashift = 12;
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autoexpand = "on";
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};
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datasets = config.ec2.zfs.datasets;
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postVM = ''
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extension=''${rootDiskImage##*.}
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friendlyName=$out/${cfg.name}
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rootDisk="$friendlyName.root.$extension"
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bootDisk="$friendlyName.boot.$extension"
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mv "$rootDiskImage" "$rootDisk"
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mv "$bootDiskImage" "$bootDisk"
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mkdir -p $out/nix-support
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echo "file ${cfg.format} $bootDisk" >> $out/nix-support/hydra-build-products
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echo "file ${cfg.format} $rootDisk" >> $out/nix-support/hydra-build-products
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${pkgs.jq}/bin/jq -n \
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--arg label ${lib.escapeShellArg config.system.nixos.label} \
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--arg system ${lib.escapeShellArg pkgs.stdenv.hostPlatform.system} \
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--arg root_logical_bytes "$(${pkgs.qemu}/bin/qemu-img info --output json "$bootDisk" | ${pkgs.jq}/bin/jq '."virtual-size"')" \
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--arg boot_logical_bytes "$(${pkgs.qemu}/bin/qemu-img info --output json "$rootDisk" | ${pkgs.jq}/bin/jq '."virtual-size"')" \
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--arg root "$rootDisk" \
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--arg boot "$bootDisk" \
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'$ARGS.named' \
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> $out/nix-support/image-info.json
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'';
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};
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extBuilder = import ../../../lib/make-disk-image.nix {
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inherit lib config configFile;
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inherit (cfg) contents format name;
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pkgs = import ../../../.. { inherit (pkgs) system; }; # ensure we use the regular qemu-kvm package
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fsType = "ext4";
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partitionTableType = if config.ec2.efi then "efi"
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else if config.ec2.hvm then "legacy+gpt"
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else "none";
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diskSize = cfg.sizeMB;
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postVM = ''
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extension=''${diskImage##*.}
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friendlyName=$out/${cfg.name}.$extension
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@ -92,4 +144,5 @@ in {
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> $out/nix-support/image-info.json
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'';
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};
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in if config.ec2.zfs.enable then zfsBuilder else extBuilder;
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}
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@ -41,17 +41,23 @@ in
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boot.growPartition = cfg.hvm;
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fileSystems."/" = {
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fileSystems."/" = mkIf (!cfg.zfs.enable) {
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device = "/dev/disk/by-label/nixos";
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fsType = "ext4";
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autoResize = true;
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};
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fileSystems."/boot" = mkIf cfg.efi {
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fileSystems."/boot" = mkIf (cfg.efi || cfg.zfs.enable) {
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# The ZFS image uses a partition labeled ESP whether or not we're
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# booting with EFI.
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device = "/dev/disk/by-label/ESP";
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fsType = "vfat";
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};
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services.zfs.expandOnBoot = mkIf cfg.zfs.enable "all";
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boot.zfs.devNodes = mkIf cfg.zfs.enable "/dev/";
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boot.extraModulePackages = [
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config.boot.kernelPackages.ena
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];
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@ -1,7 +1,46 @@
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{ config, lib, pkgs, ... }:
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{
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let
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inherit (lib) types;
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in {
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options = {
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ec2 = {
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zfs = {
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enable = lib.mkOption {
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default = false;
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internal = true;
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description = ''
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Whether the EC2 instance uses a ZFS root.
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'';
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};
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datasets = lib.mkOption {
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description = ''
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Datasets to create under the `tank` and `boot` zpools.
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**NOTE:** This option is used only at image creation time, and
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does not attempt to declaratively create or manage datasets
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on an existing system.
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'';
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default = {};
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type = types.attrsOf (types.submodule {
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options = {
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mount = lib.mkOption {
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description = "Where to mount this dataset.";
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type = types.nullOr types.string;
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default = null;
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};
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properties = lib.mkOption {
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description = "Properties to set on this dataset.";
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type = types.attrsOf types.string;
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default = {};
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};
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};
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});
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};
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};
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hvm = lib.mkOption {
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default = lib.versionAtLeast config.system.stateVersion "17.03";
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internal = true;
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@ -18,4 +57,17 @@
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};
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};
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};
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config = lib.mkIf config.ec2.zfs.enable {
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networking.hostId = lib.mkDefault "00000000";
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fileSystems = let
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mountable = lib.filterAttrs (_: value: ((value.mount or null) != null)) config.ec2.zfs.datasets;
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in lib.mapAttrs'
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(dataset: opts: lib.nameValuePair opts.mount {
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device = dataset;
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fsType = "zfs";
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})
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mountable;
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};
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}
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@ -217,6 +217,20 @@ in rec {
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}).config.system.build.amazonImage)
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);
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amazonImageZfs = forMatchingSystems [ "x86_64-linux" "aarch64-linux" ] (system:
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with import ./.. { inherit system; };
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hydraJob ((import lib/eval-config.nix {
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inherit system;
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modules =
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[ configuration
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versionModule
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./maintainers/scripts/ec2/amazon-image-zfs.nix
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];
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}).config.system.build.amazonImage)
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);
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# Test job for https://github.com/NixOS/nixpkgs/issues/121354 to test
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