[CentOS] CentOS 6 and luksOpen

[Leon Fauster]

> Am 20.06.2017 um 17:12 schrieb m.roth at 5-cent.us:
> 
> Leon Fauster wrote:
>>> Am 20.06.2017 um 16:53 schrieb m.roth at 5-cent.us:
>>> 
>>> Upgraded a RAID. Copied everything from backup.
>>> 
>>> And then my manager said I had to encrypt the drive.
>>> 
>>> I've done that, and made the filesystem, but I can't mount it.
>>> 
>>> CentOS 6.
>>> I have the entry in /etc/crypttab, and a key in /etc/crypt.pw, and the
>>> luks UUID in /etc/fstab. I cannot find the command that tells it to
>>> create the device in /dev/mapper from the info in /etc/crypttab.
>>> 
>>> Clues for the poor? Yes, the server will, at some point in the future,
>>> go to CentOS 7, but that needs my user to be off for a while, and his jobs
>>> run literally for weeks, with loads upwords of 30 on an HBS (honkin' big
>>> server)....
>> 
>> MAPDEVICE=/dev/sdxy ; cryptsetup luksOpen ${MAPDEVICE} luks-$(cryptsetup
>> luksUUID ${MAPDEVICE})
> 
> Something's not right. I did
> cryptsetup luksOpen /dev/sdb luks-$(cryptsetup luksUUID $(/dev/sdb))
> --key-file /etc/crypt.pw
> 
> It did want the password, so I added --key-file, but it seems to have
> created /dev/mapper/luks, not the full luksUUID that's in both crypttab
> and fstab.

unmap: cryptsetup luksClose /dev/mapper/luks

and then try again with following correction

NOT ...UUID $(/dev/sdb)
    ...UUID /dev/sdb

--
LF