| 29 May 2023 |
 @elvishjerricco:matrix.org | In reply to @winterqt:nixos.dev
why that ordering (well, when it works) or hexa's, over mine? is there something wrong about mine? (i have no idea what i'm doing) The problem with your ordering was that you have both Before and After on local-fs.target | 01:25:31 |
 Winter (she/her) | right, but what if I set DefaultDependencies = no? | 01:25:45 |
| Winter (she/her) | as hexa's does | 01:25:49 |
| @elvishjerricco:matrix.org | because without DefaultDependencies=no, After=local-fs.target is a (transitive) default dependency | 01:25:49 |
| @elvishjerricco:matrix.org | Then it's still not right because initrd uses initrd-fs.target instead of local-fs.target | 01:26:17 |
| @elvishjerricco:matrix.org | or rather | 01:26:19 |
| @elvishjerricco:matrix.org | it uses both | 01:26:21 |
| Winter (she/her) | ah, okay. | 01:26:24 |
| @elvishjerricco:matrix.org | but initrd-fs.target is your host file systems | 01:26:31 |
| Winter (she/her) | so sysroot.mount + initrd-fs.target are the way to go, i guess? | 01:26:41 |
| @elvishjerricco:matrix.org | while local-fs.target is stage 1 specific file systems | 01:26:42 |
| @elvishjerricco:matrix.org | initrd-fs.target depends on sysroot.mount already | 01:26:55 |
| @elvishjerricco:matrix.org | so if you just want a fully configured sysroot, with all child file systems, After=initrd-fs.target is all you need | 01:27:23 |
| @elvishjerricco:matrix.org | sysroot.mount is just if you only care about the root fs only | 01:27:40 |
| @elvishjerricco:matrix.org | oh but if you mean you want to be before things are mounted, then yea you want Before=sysroot.mount | 01:28:12 |
| Winter (she/her) | what if I want to go before sysroot (so Before = sysroot.mount), but after device nodes are created, and I don't care about anything else? do I just do Before = sysroot.mount, After = local-fs.target (so I get /dev?) | 01:28:27 |
| @elvishjerricco:matrix.org | well | 01:28:42 |
| @elvishjerricco:matrix.org | the best thing to do is have After= on the specific device you want | 01:28:55 |
| @elvishjerricco:matrix.org | in an ideal world we'd have Lily Foster's patch and you could do After=initrd-root-device.target to wait for whatever the root fs's device is | 01:29:21 |
| Winter (she/her) | ah, okay | 01:29:30 |
| @elvishjerricco:matrix.org | but that's still not "all devices" since that's not really a thing in udev | 01:29:34 |
| Winter (she/her) | In reply to @elvishjerricco:matrix.org
the best thing to do is have After= on the specific device you want how do I find that? | 01:29:44 |
| @elvishjerricco:matrix.org | Winter (she/her): What specifically are you trying to do? We may have an X Y problem here | 01:30:05 |
| Winter (she/her) | ephemeral rootfs, so I kind of need that ordering | 01:30:39 |
| Winter (she/her) | not ZFS though, so I can't rely on the ZFS import services | 01:30:56 |
| @elvishjerricco:matrix.org | so how are you achieving ephemeral rootfs then? | 01:31:16 |
| Winter (she/her) | btrfs:
mkdir /scratch
mount /dev/mapper/nixos /scratch
btrfs subvolume delete /scratch/root/srv
btrfs subvolume delete /scratch/root/var/lib/portables
btrfs subvolume delete /scratch/root/var/lib/machines
btrfs subvolume delete /scratch/root
btrfs subvolume snapshot /scratch/root-blank /scratch/root
umount /scratch
rm -r /scratch
| 01:32:26 |
| Winter (she/her) | oh, i could use cryptsetup.target | 01:32:46 |
| @elvishjerricco:matrix.org | I se | 01:32:55 |
| @elvishjerricco:matrix.org | * I see | 01:32:56 |
