[DRBD-user] Changing Hostname

Ian Knight ian at 34sp.com
Mon May 19 16:01:42 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.


Lars Ellenberg wrote:
> 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?
>
>   

Not really - how would that benefit?

--
Ian



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