121 lines
3.4 KiB
Nix
121 lines
3.4 KiB
Nix
{ pkgs, ... }:
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let
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privateKey = ''
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-----BEGIN OPENSSH PRIVATE KEY-----
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b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
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QyNTUxOQAAACBx8UB04Q6Q/fwDFjakHq904PYFzG9pU2TJ9KXpaPMcrwAAAJB+cF5HfnBe
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RwAAAAtzc2gtZWQyNTUxOQAAACBx8UB04Q6Q/fwDFjakHq904PYFzG9pU2TJ9KXpaPMcrw
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AAAEBN75NsJZSpt63faCuaD75Unko0JjlSDxMhYHAPJk2/xXHxQHThDpD9/AMWNqQer3Tg
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9gXMb2lTZMn0pelo8xyvAAAADXJzY2h1ZXR6QGt1cnQ=
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-----END OPENSSH PRIVATE KEY-----
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'';
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publicKey = ''
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ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHHxQHThDpD9/AMWNqQer3Tg9gXMb2lTZMn0pelo8xyv
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'';
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in
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{
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name = "btrbk";
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meta = with pkgs.lib; {
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maintainers = with maintainers; [ symphorien ];
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};
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nodes = {
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archive =
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{ ... }:
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{
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environment.systemPackages = with pkgs; [ btrfs-progs ];
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# note: this makes the privateKey world readable.
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# don't do it with real ssh keys.
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environment.etc."btrbk_key".text = privateKey;
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services.btrbk = {
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instances = {
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remote = {
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onCalendar = "minutely";
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settings = {
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ssh_identity = "/etc/btrbk_key";
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ssh_user = "btrbk";
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stream_compress = "lz4";
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volume = {
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"ssh://main/mnt" = {
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target = "/mnt";
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snapshot_dir = "btrbk/remote";
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subvolume = "to_backup";
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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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main =
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{ ... }:
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{
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environment.systemPackages = with pkgs; [ btrfs-progs ];
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services.openssh = {
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enable = true;
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settings = {
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KbdInteractiveAuthentication = false;
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PasswordAuthentication = false;
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};
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};
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services.btrbk = {
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extraPackages = [ pkgs.lz4 ];
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sshAccess = [
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{
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key = publicKey;
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roles = [
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"source"
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"send"
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"info"
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"delete"
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];
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}
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];
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instances = {
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local = {
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onCalendar = "minutely";
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settings = {
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volume = {
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"/mnt" = {
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snapshot_dir = "btrbk/local";
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subvolume = "to_backup";
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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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testScript = ''
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start_all()
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# create btrfs partition at /mnt
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for machine in (archive, main):
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machine.succeed("dd if=/dev/zero of=/data_fs bs=120M count=1")
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machine.succeed("mkfs.btrfs /data_fs")
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machine.succeed("mkdir /mnt")
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machine.succeed("mount /data_fs /mnt")
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# what to backup and where
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main.succeed("btrfs subvolume create /mnt/to_backup")
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main.succeed("mkdir -p /mnt/btrbk/{local,remote}")
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# check that local snapshots work
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with subtest("local"):
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main.succeed("echo foo > /mnt/to_backup/bar")
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main.wait_until_succeeds("cat /mnt/btrbk/local/*/bar | grep foo")
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main.succeed("echo bar > /mnt/to_backup/bar")
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main.succeed("cat /mnt/btrbk/local/*/bar | grep foo")
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# check that btrfs send/receive works and ssh access works
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with subtest("remote"):
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archive.wait_until_succeeds("cat /mnt/*/bar | grep bar")
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main.succeed("echo baz > /mnt/to_backup/bar")
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archive.succeed("cat /mnt/*/bar | grep bar")
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'';
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}
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