[nsd-users] nsd3 fills disk

Klaus Darilion klaus.mailinglists at pernau.at
Fri Jul 11 14:07:40 CEST 2014


Ok. That makes sense. Patching fails due to "out of memory" so the files
grow ...

Thanks
Klaus

On 11.07.2014 13:02, Matthijs Mekking wrote:
> Hi Klaus,
> 
> The ixfr.db file maintains all changes that has been made to the zones.
> 
> With NSD3, you need to run nsdc patch (or nsd-patch) regularly to make
> sure that this file does not grow indefinitely.
> 
> Best regards,
>   Matthijs
> 
> 
> On 07/11/2014 11:29 AM, Klaus Darilion wrote:
>> Hi!
>>
>> My test zone is also served by an nsd3 3.2.15 slave. It seems, that
>> sometimes the server has too less memory to update to a newer zone file:
>>
>> Jul 11 04:23:04 nsd[857]: memory recyclebin holds 113128 bytes
>> Jul 11 04:23:27 nsd[857]: nsec3-prepare took 23 seconds for 1 zones.
>> Jul 11 04:23:27 nsd[857]: fork failed: Cannot allocate memory
>> Jul 11 04:23:27 nsd[382]: handle_reload_cmd: reload closed cmd channel
>> Jul 11 04:23:27 nsd[382]: Reload process 857 failed with status 256,
>> continuing with old database
>> Jul 11 04:25:12 nsd[411]: Notify received and accepted, forward to xfrd
>> Jul 11 04:26:36 nsd[411]: Notify received and accepted, forward to xfrd
>> Jul 11 04:26:36 nsd[26991]: Handle incoming notify for zone test
>> Jul 11 04:26:36 nsd[26991]: xfrd: zone test written received XFR from
>> 83.136.34.4 with serial 2014071106 to disk
>> Jul 11 04:26:36 nsd[26991]: last message repeated 54 times
>> Jul 11 04:26:36 nsd[26991]: xfrd: zone test committed "xfrd: zone test
>> received update to serial 2014071106 at time 1405052796 from 83.136.34.4
>> in 55 parts TSIG verified with key rcode0-distribution"
>> Jul 11 04:26:36 nsd[382]: signal received, reloading...
>> Jul 11 04:26:57 nsd[965]: memory recyclebin holds 112696 bytes
>> Jul 11 04:27:21 nsd[965]: nsec3-prepare took 24 seconds for 1 zones.
>> Jul 11 04:27:21 nsd[965]: fork failed: Cannot allocate memory
>> Jul 11 04:27:21 nsd[382]: handle_reload_cmd: reload closed cmd channel
>> Jul 11 04:27:21 nsd[382]: Reload process 965 failed with status 256,
>> continuing with old database
>> Jul 11 04:27:21 nsd[26991]: xfrd: zone test: soa serial 2014071106
>> update failed, restarting transfer (notified zone)
>> Jul 11 04:27:21 nsd[26991]: Handle incoming notify for zone test
>>
>> Ok. Probably I gave too less memory to the VM. But some hours later,
>> suddenly the disk gets full:
>>
>> Jul 11 06:55:31 nsd[382]: signal received, reloading...
>> Jul 11 06:56:21 nsd[2245]: memory recyclebin holds 112696 bytes
>> Jul 11 06:56:44 nsd[2245]: nsec3-prepare took 23 seconds for 1 zones.
>> Jul 11 06:56:44 nsd[2245]: fork failed: Cannot allocate memory
>> Jul 11 06:56:44 nsd[382]: handle_reload_cmd: reload closed cmd channel
>> Jul 11 06:56:44 nsd[382]: Reload process 2245 failed with status 256,
>> continuing with old database
>> Jul 11 06:56:44 nsd[26991]: xfrd: zone test: soa serial 2014071108
>> update failed, restarting transfer (notified zone)
>> Jul 11 06:56:44 nsd[26991]: Handle incoming notify for zone test
>> Jul 11 07:00:13 nsd[411]: Notify received and accepted, forward to xfrd
>> Jul 11 07:00:13 nsd[26991]: Handle incoming notify for zone test
>> Jul 11 07:00:13 nsd[26991]: xfrd: zone test written received XFR from
>> 83.136.34.4 with serial 2014071108 to disk
>> Jul 11 07:00:20 nsd[26991]: last message repeated 2116 times
>> Jul 11 07:00:20 nsd[26991]: xfrd: zone test written received XFR from
>> 83.136.34.4 with serial 2014071108 to disk
>> Jul 11 07:00:30 nsd[26991]: last message repeated 5853 times
>> Jul 11 07:00:30 nsd[26991]: xfrd: zone test written received XFR from
>> 83.136.34.4 with serial 2014071108 to disk
>> Jul 11 07:00:31 nsd[26991]: last message repeated 669 times
>> Jul 11 07:00:31 nsd[26991]: short write (disk full?)
>> Jul 11 07:00:31 nsd[26991]: could not write to file
>> /var/lib/nsd3/ixfr.db: No space left on device
>>
>>
>> # ll /var/lib/nsd3/
>> -rw-r--r-- 1 nsd nsd 3255480320 2014-07-11 09:25 ixfr.db
>> -rw-r--r-- 1 nsd nsd  546008330 2014-07-11 04:21 nsd.db
>> -r--r--r-- 1 nsd nsd          0 2014-07-11 09:16 nsd.db.lock
>> -rw-r--r-- 1 nsd nsd  666578670 2014-07-11 04:20 test.zone
>> -rw-r--r-- 1 nsd nsd       1493 2014-07-10 14:32 xfrd.state
>>
>>
>> Why is the ixfr.db file so huge? ixfr.db is 3GB although the zone is
>> only 600MB large.
>>
>> May it be that nsd just retransfers the zone again and again, and does
>> not delete the ixfr.db but append every transfer to the file?
>>
>> I think that "disk full" is caused by some strange nsd3 behavior due to
>> "out of memory" and may be fixed.
>>
>> thanks
>> Klaus
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
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