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example/raid.nix
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60
example/raid.nix
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@ -0,0 +1,60 @@
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# usage: nix-instantiate --eval --json --strict example/config.nix | jq .
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{
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type = "devices";
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content = {
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vdb = {
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type = "table";
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format = "gpt";
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partitions = [
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{
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type = "partition";
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part-type = "primary";
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start = "1MiB";
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end = "100%";
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content = {
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type = "mdraid";
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name = "raid1";
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};
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}
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];
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};
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vdc = {
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type = "table";
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format = "gpt";
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partitions = [
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{
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type = "partition";
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part-type = "primary";
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start = "1MiB";
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end = "100%";
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content = {
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type = "mdraid";
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name = "raid1";
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};
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}
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];
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};
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raid1 = {
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type = "mdadm";
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level = 1;
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content = {
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type = "table";
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format = "gpt";
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partitions = [
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{
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type = "partition";
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part-type = "primary";
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start = "1MiB";
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end = "100%";
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content = {
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type = "filesystem";
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format = "ext4";
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mountpoint = "/raid";
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};
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}
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];
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};
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};
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};
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}
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@ -2,12 +2,7 @@
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with lib;
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with lib;
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with builtins;
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with builtins;
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let {
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let
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body.config = config-f {};
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body.create = create-f {};
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body.mount = mount-f {};
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helper.find-device = device: let
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helper.find-device = device: let
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environment = helper.device-id device;
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environment = helper.device-id device;
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@ -16,14 +11,14 @@ let {
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if hasPrefix "/dev/disk" device then
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if hasPrefix "/dev/disk" device then
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"${environment}='${device}'"
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"${environment}='${device}'"
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else ''
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else ''
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${environment}=$(for x in /dev/disk/by-path/*; do
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${environment}=$(for x in $(find /dev/disk/{by-path,by-id}/); do
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dev=$x
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dev=$x
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if [ "$(readlink -f $x)" = '${device}' ]; then
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if [ "$(readlink -f $x)" = "$(readlink -f '${device}')" ]; then
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target=$dev
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target=$dev
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break
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break
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fi
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fi
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done
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done
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if test -z $target; then
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if test -z ''${target+x}; then
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echo 'unable to find path of disk: ${device}, bailing out' >&2
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echo 'unable to find path of disk: ${device}, bailing out' >&2
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exit 1
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exit 1
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else
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else
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@ -71,8 +66,23 @@ let {
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mkfs.${x.format} ${q.device}
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mkfs.${x.format} ${q.device}
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'';
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'';
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create.devices = q: x: ''
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create.devices = q: x: let
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${concatStrings (mapAttrsToList (name: create-f { device = "/dev/${name}"; }) x.content)}
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raid-devices = lib.filterAttrs (_: dev: dev.type == "mdadm") x.content;
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other-devices = lib.filterAttrs (_: dev: dev.type != "mdadm") x.content;
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in ''
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${concatStrings (mapAttrsToList (name: create-f { device = "/dev/${name}"; }) other-devices)}
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${concatStrings (mapAttrsToList (name: create-f { device = "/dev/${name}"; name = name; }) raid-devices)}
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'';
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create.mdraid = q: x: ''
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RAIDDEVICES_N_${x.name}=$((''${RAIDDEVICES_N_${x.name}:-0}+1))
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RAIDDEVICES_${x.name}="''${RAIDDEVICES_${x.name}:-}${q.device} "
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'';
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create.mdadm = q: x: ''
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echo 'y' | mdadm --create /dev/md/${q.name} --level=${toString x.level or 1} --raid-devices=''${RAIDDEVICES_N_${q.name}} ''${RAIDDEVICES_${q.name}}
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udevadm trigger --subsystem-match=block; udevadm settle
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${create-f { device = "/dev/md/${q.name}"; } x.content}
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'';
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'';
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create.luks = q: x: ''
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create.luks = q: x: ''
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@ -158,6 +168,10 @@ let {
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mount.noop = q: x: {};
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mount.noop = q: x: {};
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# TODO maybe we need to do something here?
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mount.mdadm = mount.noop;
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mount.mdraid = mount.noop;
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mount.partition = q: x:
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mount.partition = q: x:
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mount-f { device = "\"\${${q.device}}\"-part" + toString q.index; } x.content;
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mount-f { device = "\"\${${q.device}}\"-part" + toString q.index; } x.content;
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@ -166,4 +180,15 @@ let {
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(foldl' recursiveUpdate {} (imap (index: mount-f (q // { inherit index; device = helper.device-id q.device; })) x.partitions))
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(foldl' recursiveUpdate {} (imap (index: mount-f (q // { inherit index; device = helper.device-id q.device; })) x.partitions))
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{table.${q.device} = helper.find-device q.device;}
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{table.${q.device} = helper.find-device q.device;}
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);
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);
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in {
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config = config-f {};
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create = cfg: ''
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set -efux
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${create-f {} cfg}
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'';
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mount = cfg: ''
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set -efux
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${mount-f {} cfg}
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'';
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}
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}
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@ -7,84 +7,7 @@ let
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inherit pkgs;
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inherit pkgs;
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inherit (pkgs) system;
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inherit (pkgs) system;
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};
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};
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disko-config = {
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disko-config = import ../example/raid.nix;
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type = "devices";
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content = {
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vdb = {
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type = "table";
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format = "gpt";
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partitions = [
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{
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type = "partition";
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part-type = "ESP";
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start = "1MiB";
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end = "100MiB";
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fs-type = "FAT32";
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bootable = true;
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content = {
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type = "filesystem";
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format = "vfat";
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mountpoint = "/boot";
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options = [
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"defaults"
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];
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};
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}
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{
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type = "partition";
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part-type = "primary";
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start = "100MiB";
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end = "100%";
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content = {
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type = "luks";
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algo = "aes-xts...";
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name = "crypted";
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keyfile = "/tmp/secret.key";
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extraArgs = [
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"--hash sha512"
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"--iter-time 5000"
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];
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content = {
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type = "lvm";
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name = "pool";
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lvs = {
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root = {
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type = "lv";
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size = "100M";
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mountpoint = "/";
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content = {
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type = "filesystem";
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format = "ext4";
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mountpoint = "/";
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options = [
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"defaults"
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];
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};
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};
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home = {
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type = "lv";
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size = "10M";
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content = {
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type = "filesystem";
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format = "ext4";
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mountpoint = "/home";
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};
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};
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raw = {
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type = "lv";
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size = "10M";
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content = {
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type = "noop";
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};
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};
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};
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};
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};
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}
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];
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};
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};
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};
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tsp-create = pkgs.writeScript "create" ((pkgs.callPackage ../. {}).create disko-config);
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tsp-create = pkgs.writeScript "create" ((pkgs.callPackage ../. {}).create disko-config);
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tsp-mount = pkgs.writeScript "mount" ((pkgs.callPackage ../. {}).mount disko-config);
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tsp-mount = pkgs.writeScript "mount" ((pkgs.callPackage ../. {}).mount disko-config);
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in makeTest' {
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in makeTest' {
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@ -102,7 +25,7 @@ in makeTest' {
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# speed-up eval
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# speed-up eval
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documentation.enable = false;
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documentation.enable = false;
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virtualisation.emptyDiskImages = [ 512 ];
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virtualisation.emptyDiskImages = [ 512 512 ];
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};
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};
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testScript = ''
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testScript = ''
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@ -110,6 +33,6 @@ in makeTest' {
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machine.succeed("${tsp-create}");
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machine.succeed("${tsp-create}");
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machine.succeed("${tsp-mount}");
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machine.succeed("${tsp-mount}");
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machine.succeed("${tsp-mount}"); # verify that the command is idempotent
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machine.succeed("${tsp-mount}"); # verify that the command is idempotent
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machine.succeed("test -b /dev/mapper/pool-raw");
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machine.succeed("test -b /dev/md/raid1");
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'';
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'';
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}
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}
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