| 31 Jan 2025 |
 Rayane Nakib (ريّان نقيب) | In reply to @elvishjerricco:matrix.org
Yea, there's a btrfs subvolume delete command This command doesn't work | 14:32:37 |
| Rayane Nakib (ريّان نقيب) | even with --commit-after option | 14:33:11 |
 ElvishJerricco | why not? | 14:33:21 |
| ElvishJerricco | the command is there for a reason; presumably it's capable of working | 14:33:37 |
| Rayane Nakib (ريّان نقيب) | I don't know?! I am not on my PC right now, But I will post the error message that I get when I get the chant | 14:34:22 |
| Rayane Nakib (ريّان نقيب) | * | 14:34:39 |
| Rayane Nakib (ريّان نقيب) | * | 14:34:51 |
| Rayane Nakib (ريّان نقيب) | * | 14:35:10 |
 Alyssa Ross | wfm | 14:36:08 |
| Alyssa Ross | I do a very similar thing in initrd, although I'm still on the non-systemd one I think | 14:36:28 |
| ElvishJerricco | sidenote, the impermanence readme really ought to include a solid systemd initrd example. | 14:36:32 |
| Alyssa Ross | https://git.qyliss.net/nixlib/tree/sys/mbp.nix#n18 | 14:37:27 |
| Rayane Nakib (ريّان نقيب) | In reply to @elvishjerricco:matrix.org
sidenote, the impermanence readme really ought to include a solid systemd initrd example. And an option to just delete the old root, or keep only one version, I have limited space im my laptop, I can't have 30 days old files there. | 14:37:42 |
| Alyssa Ross | Being able to remove a directory without being able to recurse is to me the main appeal of subvolems | 14:38:23 |
| Alyssa Ross | * | 14:38:28 |
| Rayane Nakib (ريّان نقيب) | In reply to @qyliss:fairydust.space
Being able to remove a directory without being able to recurse is to me the main appeal of subvolumes I couldn't make it work. | 14:38:59 |
| ElvishJerricco | (sidenote, update that to postResumeCommands rather than postDeviceCommands, if you care at all about not having horrible breakage if you use hibernation) | 14:39:08 |
| Alyssa Ross | I don't use hybernation, but that sounds like a good change to make regardless, thank you. | 14:40:39 |
| Alyssa Ross | In reply to @nakibrayane:matrix.org
I couldn't make it work. You don't have nested subvolumes in there, do you? | 14:41:01 |
| Alyssa Ross | systemd will make some | 14:41:04 |
| Alyssa Ross | like /var/lib/machines and /var/lib/portables | 14:41:15 |
| ElvishJerricco | wait systemd just implicitly creates subvolumes? | 14:41:32 |
| Alyssa Ross | It comes with default tmpfiles.d rules that do | 14:41:41 |
| ElvishJerricco | huh | 14:41:46 |
| ElvishJerricco | odd | 14:41:48 |
| Alyssa Ross | it's very annoying because things will then fail if those paths are symlinks | 14:42:07 |
| Alyssa Ross | so they need to be bind mounts instead | 14:42:22 |
| Rayane Nakib (ريّان نقيب) | boot.initrd.systemd.services.rollback = {
description = "Rollback BTRFS root subvolume to a pristine state";
wantedBy = [ "initrd.target" ];
after = [ "systemd-cryptsetup@crypted.service" ];
before = [ "sysroot.mount" ];
unitConfig.DefaultDependencies = "no";
serviceConfig.Type = "oneshot";
script = # bash
''
mkdir /btrfs_tmp
mount /dev/mapper/crypted /btrfs_tmp
if [[ -e /btrfs_tmp/root ]]; then
btrfs subvolume delete /btrfs_tmp/root
fi
btrfs subvolume create /btrfs_tmp/root
umount /btrfs_tmp
'';
};
$ journalctl -b -u rollback
جانفي 31 15:59:07 HP-14s-dq2024nf systemd[1]: Starting Rollback BTRFS root subvolume to a pristine state...
جانفي 31 15:59:07 HP-14s-dq2024nf rollback-start[530]: ERROR: Could not destroy subvolume/snapshot: Directory not empty
جانفي 31 15:59:07 HP-14s-dq2024nf rollback-start[530]: Delete subvolume 324 (no-commit): '/btrfs_tmp/root'
جانفي 31 15:59:07 HP-14s-dq2024nf systemd[1]: rollback.service: Main process exited, code=exited, status=1/FAILURE
جانفي 31 15:59:07 HP-14s-dq2024nf systemd[1]: rollback.service: Failed with result 'exit-code'.
جانفي 31 15:59:07 HP-14s-dq2024nf systemd[1]: Failed to start Rollback BTRFS root subvolume to a pristine state.
| 15:00:41 |
| Rayane Nakib (ريّان نقيب) | * boot.initrd.systemd.services.rollback = {
description = "Rollback BTRFS root subvolume to a pristine state";
wantedBy = [ "initrd.target" ];
after = [ "systemd-cryptsetup@crypted.service" ];
before = [ "sysroot.mount" ];
unitConfig.DefaultDependencies = "no";
serviceConfig.Type = "oneshot";
script = # bash
''
mkdir /btrfs_tmp
mount /dev/mapper/crypted /btrfs_tmp
if [[ -e /btrfs_tmp/root ]]; then
btrfs subvolume delete /btrfs_tmp/root
fi
btrfs subvolume create /btrfs_tmp/root
umount /btrfs_tmp
'';
};
$ journalctl -b -u rollback
جانفي 31 15:59:07 HP-14s-dq2024nf systemd[1]: Starting Rollback BTRFS root subvolume to a pristine state...
جانفي 31 15:59:07 HP-14s-dq2024nf rollback-start[530]: ERROR: Could not destroy subvolume/snapshot: Directory not empty
جانفي 31 15:59:07 HP-14s-dq2024nf rollback-start[530]: Delete subvolume 324 (no-commit): '/btrfs_tmp/root'
جانفي 31 15:59:07 HP-14s-dq2024nf systemd[1]: rollback.service: Main process exited, code=exited, status=1/FAILURE
جانفي 31 15:59:07 HP-14s-dq2024nf systemd[1]: rollback.service: Failed with result 'exit-code'.
جانفي 31 15:59:07 HP-14s-dq2024nf systemd[1]: Failed to start Rollback BTRFS root subvolume to a pristine state.
| 15:01:11 |
| ElvishJerricco | yea, it seems like you've got subvolumes within that subvolume | 15:49:54 |
