[DRBD-user] Changing Hostname

Lars Ellenberg lars.ellenberg at linbit.com
Mon May 19 14:02:56 CEST 2008

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


On Mon, May 19, 2008 at 10:56:25AM +0100, Ian Knight wrote:
> LINBIT Support - Lars Ellenberg wrote:
>> On Fri, May 16, 2008 at 09:53:03PM +0100, Ian Knight wrote:
>>   
>>>> would you please just type in "uname -n",
>>>> and copy'n'paste the output into your drbd.conf?
>>>>
>>>>         
>>> For security reasons i can not on a public list - but it is   
>>> "master.CORRECTDOMAIN.com"
>>>     
>>>>> For the time being i have had to set the hostname back to    
>>>>> master.INCORRECTDOMAIN.com - but ideally i would like to update 
>>>>> it   properly which means updating the hostname within the 
>>>>> meta-data i would  imagine.
>>>>>             
>>>> again, DRBD does NOT store anything hostname related anywhere.
>>>> drbdadm just does a "uname -n" equivalent, and looks for a "on
>>>> $thatname" section in the config file.
>>>>
>>>>         
>>> So does drbdadm dump-xml just get its info from the drbd.conf file?
>>>     
>>
>> absolutely.
>> use "drbdadm dump", to get a more human friendly representation,
>> which should basically look exactly like your config file,
>> "canonically" indented and stripped off the comments.
>>
>>   
>>>> do you happen to use the ofc drbd resource agent,
>>>> and the "clone overrides hostname" misfeature?
>>>> if so, you'd need to change your "override" as well...
>>>>
>>>>         
>>> Im afraid i dont understand this question - i am just using drbd on a 
>>>  centos5 x86_64 kernel.
>>>     
>>
>> the heartbeat2 ocf drbd resource agent has a "floating peers" mode,
>> where it overrides the hostname drbdadm thinks it is running on.
>> if you use that, then you can obviously change the real hostname all you
>> want, because the resource agent will override it.
>>
>>   
> Anyone have an ideas as to why if i change the hostname of the server  
> then drbd comes up with these errors.

ever used strace?

-- 
: Lars Ellenberg                           http://www.linbit.com :
: DRBD/HA support and consulting             sales at linbit.com :
: LINBIT Information Technologies GmbH      Tel +43-1-8178292-0  :
: Vivenotgasse 48, A-1120 Vienna/Europe     Fax +43-1-8178292-82 :
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