Unable to mount LUKS partition

RancherOS
1

Hi there!

I’m trying to mount a LUKS encrypted partition on a 8Tb USB disk. So far, I switched console to Ubuntu and
apt-get cryptsetup

When I try to
cryptsetup luksOpen /dev/sdc2 encrypted
I get a prompt to write the password and after I enter it, cryptsetup hangs and nothing else happens.

The partition was created on a different host with Ubuntu 17.04 and unlocks normally when pulgged there.
Anything I could try? (or is it nos possible at all?)

Thanks!

-Iván.

EDIT: Well, after some more proper troubleshooting, I’ve found that altohugh cryptsetup never ends execution, the actual /dev/dm-0 is created, so I

ln -s /dev/dm-0 /dev/mapper/encrypted

to finish the job. After that I was able to

mkfs.ext4 /dev/mapper/encrypted and mount /dev/mapper/encrypted /mnt/internal

So, it clearly works, although cryptsetup gets blocked by some reason (?). I don’t feel very comfortable with a (un)dead cryptsetup command lying around, so any solution/fix will be greatly appreciated.

2

Here is a issue, https://github.com/rancher/os/issues/2551.
If this is what you want, you can track that.

3

It seems that this still is an issue. It is reported here. It only happens to me when I’m not using the default console.

I managed to use this as a successful workaround:

system-docker exec -ti cryptsetup luksOpen /dev/sda2 srv