pyrox.dev
1import ./make-test-python.nix ({ pkgs, ... }:
2
3 let
4 privateKey = ''
5 -----BEGIN OPENSSH PRIVATE KEY-----
6 b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
7 QyNTUxOQAAACBx8UB04Q6Q/fwDFjakHq904PYFzG9pU2TJ9KXpaPMcrwAAAJB+cF5HfnBe
8 RwAAAAtzc2gtZWQyNTUxOQAAACBx8UB04Q6Q/fwDFjakHq904PYFzG9pU2TJ9KXpaPMcrw
9 AAAEBN75NsJZSpt63faCuaD75Unko0JjlSDxMhYHAPJk2/xXHxQHThDpD9/AMWNqQer3Tg
10 9gXMb2lTZMn0pelo8xyvAAAADXJzY2h1ZXR6QGt1cnQ=
11 -----END OPENSSH PRIVATE KEY-----
12 '';
13 publicKey = ''
14 ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHHxQHThDpD9/AMWNqQer3Tg9gXMb2lTZMn0pelo8xyv
15 '';
16 in
17 {
18 name = "btrbk";
19 meta = with pkgs.lib; {
20 maintainers = with maintainers; [ symphorien ];
21 };
22
23 nodes = {
24 archive = { ... }: {
25 environment.systemPackages = with pkgs; [ btrfs-progs ];
26 # note: this makes the privateKey world readable.
27 # don't do it with real ssh keys.
28 environment.etc."btrbk_key".text = privateKey;
29 services.btrbk = {
30 extraPackages = [ pkgs.lz4 ];
31 instances = {
32 remote = {
33 onCalendar = "minutely";
34 settings = {
35 ssh_identity = "/etc/btrbk_key";
36 ssh_user = "btrbk";
37 stream_compress = "lz4";
38 volume = {
39 "ssh://main/mnt" = {
40 target = "/mnt";
41 snapshot_dir = "btrbk/remote";
42 subvolume = "to_backup";
43 };
44 };
45 };
46 };
47 };
48 };
49 };
50
51 main = { ... }: {
52 environment.systemPackages = with pkgs; [ btrfs-progs ];
53 services.openssh = {
54 enable = true;
55 passwordAuthentication = false;
56 kbdInteractiveAuthentication = false;
57 };
58 services.btrbk = {
59 extraPackages = [ pkgs.lz4 ];
60 sshAccess = [
61 {
62 key = publicKey;
63 roles = [ "source" "send" "info" "delete" ];
64 }
65 ];
66 instances = {
67 local = {
68 onCalendar = "minutely";
69 settings = {
70 volume = {
71 "/mnt" = {
72 snapshot_dir = "btrbk/local";
73 subvolume = "to_backup";
74 };
75 };
76 };
77 };
78 };
79 };
80 };
81 };
82
83 testScript = ''
84 start_all()
85
86 # create btrfs partition at /mnt
87 for machine in (archive, main):
88 machine.succeed("dd if=/dev/zero of=/data_fs bs=120M count=1")
89 machine.succeed("mkfs.btrfs /data_fs")
90 machine.succeed("mkdir /mnt")
91 machine.succeed("mount /data_fs /mnt")
92
93 # what to backup and where
94 main.succeed("btrfs subvolume create /mnt/to_backup")
95 main.succeed("mkdir -p /mnt/btrbk/{local,remote}")
96
97 # check that local snapshots work
98 with subtest("local"):
99 main.succeed("echo foo > /mnt/to_backup/bar")
100 main.wait_until_succeeds("cat /mnt/btrbk/local/*/bar | grep foo")
101 main.succeed("echo bar > /mnt/to_backup/bar")
102 main.succeed("cat /mnt/btrbk/local/*/bar | grep foo")
103
104 # check that btrfs send/receive works and ssh access works
105 with subtest("remote"):
106 archive.wait_until_succeeds("cat /mnt/*/bar | grep bar")
107 main.succeed("echo baz > /mnt/to_backup/bar")
108 archive.succeed("cat /mnt/*/bar | grep bar")
109 '';
110 })