Re: Demand for LUKS password blocks boot

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Ed Greshko wrote:
> Robin Laing wrote:
>> On 01/21/2010 08:32 AM, Ed Greshko wrote:
>>   
>>> Dr. Michael J. Chudobiak wrote:
>>>     
>>>> On 01/21/2010 09:40 AM, Bryn M. Reeves wrote:
>>>>
>>>>       
>>>>>> From:
>>>>>> https://fedoraproject.org/wiki/Dracut/Options#crypto_LUKS
>>>>>>
>>>>>> Pass: rd_NO_LUKS to your kernel boot line.
>>>>>>           
>>   
>>> What happens if you normally want a particular uuid to be activated on
>>> boot...but there is a power fail and restore at 3am?  Wouldn't you still
>>> be stuck with a system waiting for the password when what you may want
>>> would be for the system to come up without that device?  Wouldn't a
>>> rd_LUKS_timeout=<X seconds>  make sense?
>>>
>>>
>>>     
>> If a drive is encrypted, where do you expect to get the password from?
>>   
> The keyboard via a person entering it...
>> I am just curious because I have started to encrypt my drives and I have 
>> to enter the password on each boot.  It is to ensure that the system 
>> cannot be accessed unless the password is entered.
>>
>> Maybe my concept of encrypted partitions is different than yours.
>>
>>   
> No, it isn't.  But,  you may have missed the beginning of the thread?
> 
> The OP has some external encrypted disks that are not critical to system
> operation.  Other functions of the system are critical.  The system is
> configured to reboot when power is restored after a power failure.  If
> the system is unattended and an encrypted disk is attached the boot
> process will wait for forever for the password until it proceeds.  I
> think you can see the issue should this happen at 3AM Saturday....
> 
> The suggestion of rd_LUKS_timeout=<X seconds> would allow the boot to
> proceed *without* the encrypted disk being mounted.
> 
> 
Where do you find the doc for this? I tried the man page for cryptosetup, which 
suggests the non-existant luks.endorphin.org, looked in the kernel source and 
kernel-parameters.txt file, googled for rd_LUKS_ and generally found nothing.

The page at http://www.saout.de/misc/dm-crypt/ has lots of usage for the setup 
command, but I don't see the options listed, and 
https://fedoraproject.org/wiki/Dracut/Options#crypto_LUKS doesn't include this 
timeout option, either.

-- 
Bill Davidsen <davidsen@xxxxxxx>
   "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot
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