Recovering from loss of leases.dhcpd on secondary of failover pair

Nick Urbanik nicku at nicku.org
Sat Jan 12 20:47:45 UTC 2008


Dear Folks,

On 13/01/08 01:41 +1100, Nick Urbanik wrote:
> On 13/01/08 01:23 +1100, Nick Urbanik wrote:
>> On 13/01/08 00:39 +1100, Glenn Satchell wrote:
>>> Are you sure communication is working between the two dhcp servers?
>
> However, the rebalancing is taking place with extraordinary slowness;
> now the number of PC leases in the secondary lease file is:
>
> active: 4952, backup: 417, free: 956
> active: 4125, backup: 327, free: 608

And now, 6 hours 20 minutes later, we only have (for the public IPs
used by the PCs behind the cable modems):

UNKNWON: backup: 13534
active: 889, free: 958
active: 2887, backup: 376, free: 1038
active: 919, backup: 197, free: 402
active: 2243, backup: 291, free: 755
backup: 791
active: 4584, backup: 333, free: 1155
active: 4940, backup: 516, free: 1121
active: 5548, backup: 467, free: 1067
active: 5750, backup: 412, free: 922
active: 4813, backup: 498, free: 1014
active: 4933, backup: 417, free: 975
active: 4117, backup: 327, free: 616

Any suggestions on how to gee it up (make synchronisation go faster)?
I think most of the synchronisation messages relate to the much larger
number of private addresses used by the cable modems.

>>> What messages, if any, are there in the log files?
>
>> There are lots of "peer holds all free leases" in the secondary log.
>
> However, there are no "peer holds" messages at all in the primary log.
> It shows that it is busy handing out addresses.

However, we have quite a few customer complaints.

>> The number of PC leases in the secondary lease file is only:
>> active: 1028, free: 954
>> active: 4125, backup: 327, free: 608
>>
>> whereas on the primary, we have:
>>
>> UNKNWON: abandoned: 1, active: 13787, backup: 26867, expired: 1, free: 7472
>> abandoned: 1, active: 3837, backup: 359, expired: 2, free: 608
>> abandoned: 1, active: 3859, backup: 333, expired: 2, free: 612
>> active: 4569, backup: 448, expired: 4, free: 798
>> active: 4533, backup: 483, expired: 5, free: 798
>> active: 5957, backup: 474, expired: 3, free: 903
>> active: 2992, backup: 274, free: 529
>> active: 3068, backup: 257, free: 470
>> abandoned: 1, active: 2004, backup: 911, expired: 9, free: 1375, released: 1
>> active: 2962, backup: 270, free: 563
>> active: 2319, backup: 1689, expired: 6, free: 2309, released: 1
>> active: 1718, backup: 802, expired: 1, free: 1021
>> active: 877, backup: 361, free: 540
>> active: 4318, backup: 500, free: 748
>> abandoned: 2, active: 4740, backup: 499, expired: 4, free: 827
>> abandoned: 1, active: 2853, backup: 1060, expired: 5, free: 1394
>> backup: 465
>> active: 3341, backup: 365, free: 595
>> active: 5481, backup: 391, expired: 9, free: 697
>> active: 3496, backup: 351, free: 706
>> active: 3757, backup: 377, expired: 10, free: 663
>> active: 3188, backup: 331, free: 529
>> active: 3268, backup: 376, free: 657
>> active: 1021, backup: 197, free: 300
>> active: 2496, backup: 300, free: 493
>> backup: 791
>> active: 4945, backup: 353, expired: 5, free: 769
>> abandoned: 2, active: 5176, backup: 541, expired: 5, free: 853, released: 1
>> abandoned: 1, active: 5776, backup: 467, free: 839
>> abandoned: 1, active: 5898, backup: 427, expired: 3, free: 754, released: 1
>> active: 4891, backup: 515, expired: 4, free: 915
>> active: 5020, backup: 418, free: 887
>> active: 4064, backup: 327, free: 669
-- 
Nick Urbanik   RHCE         http://nicku.org        nicku at nicku.org
GPG: 7FFA CDC7 5A77 0558 DC7A 790A 16DF EC5B BB9D 2C24 ID: BB9D2C24
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