[CentOS] CentOS 6 and luksOpen

Tue Jun 20 15:12:35 UTC 2017
m.roth at 5-cent.us <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

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.


> MAPDEVICE=/dev/sdxy ; mount /dev/mapper/luks-$(cryptsetup luksUUID
> ${MAPDEVICE}) /mnt
> --
> LF
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