[Gluster-users] Is rebalance in progress or not?

[Alexander Iliev]

On 3/15/20 11:07 AM, Strahil Nikolov wrote:
> On March 15, 2020 11:50:32 AM GMT+02:00, Alexander Iliev <ailiev+gluster at mamul.org> wrote:
>> Hi list,
>>
>> I was having some issues with one of my Gluster nodes so I ended up
>> re-installing it. Now I want to re-add the bricks for my main volume
>> and
>> I'm having the following issue - when I try to add the bricks I get:
>>
>>> # gluster volume add-brick store1 replica 3 <bricks ...>
>>> volume add-brick: failed: Pre Validation failed on 172.31.35.132.
>> Volume name store1 rebalance is in progress. Please retry after
>> completion
>>
>> But then if I get the rebalance status I get:
>>
>>> # gluster volume rebalance store1 status
>>> volume rebalance: store1: failed: Rebalance not started for volume
>> store1.
>>
>> And if I try to start the rebalancing I get:
>>
>>> # gluster volume rebalance store1 start
>>> volume rebalance: store1: failed: Rebalance on store1 is already
>> started
>>
>> Looking at the logs of the first node, when I try to start the
>> rebalance
>> operation I see this:
>>
>>> [2020-03-15 09:41:31.883651] E [MSGID: 106276]
>> [glusterd-rpc-ops.c:1200:__glusterd_stage_op_cbk] 0-management:
>> Received
>> stage RJT from uuid: 9476b8bb-d7ee-489a-b083-875805343e67
>>
>> On the second node the logs are showing stuff that indicates that a
>> rebalance operation is indeed in progress:
>>
>>> [2020-03-15 09:47:34.190042] I [MSGID: 109081]
>> [dht-common.c:5868:dht_setxattr] 0-store1-dht: fixing the layout of
>> /redacted
>>> [2020-03-15 09:47:34.775691] I
>> [dht-rebalance.c:3285:gf_defrag_process_dir] 0-store1-dht: migrate data
>>
>> called on /redacted
>>> [2020-03-15 09:47:36.019403] I
>> [dht-rebalance.c:3480:gf_defrag_process_dir] 0-store1-dht: Migration
>> operation on dir /redacted took 1.24 secs
>>
>>
>> Some background on what led to this situation:
>>
>> The volume was originally a replica 3 distributed replicated volume on
>> three nodes. In order to detach the faulty node I lowered the replica
>> count to 2 and removed the bricks from that node from the volume. I
>> cleaned up the storage (formatted the bricks and cleaned the
>> trusted.gfid and trusted.glusterfs.volume-id extended attributes) and
>> purged the gluster packages from the system, then I re-installed the
>> gluster packages and did a `gluster peer probe` from another node.
>>
>> I'm running Gluster 6.6 on CentOS 7.7 on all nodes.
>>
>> I feel stuck at this point, so any guidance will be greatly
>> appreciated.
>>
>> Thanks!
>>
>> Best regards,
> 
> Hey  Alex,
> 
> Did you try to  go the second node  (the  one tgat  thinks  balance  is running)  and stop tge balance ?
> 
> gluster volume rebalance VOLNAME stop
> 
> Then add the new brick (and  increase  the  replica  count) and after  the  heal is over - rebalance again.

Hey Strahil,

Thanks for the suggestion, I just tried it, but unfortunately the result 
is pretty much the same - when I try to stop the rebalance on the second 
node it reports that no rebalance is in progress:

 > # gluster volume rebalance store1 stop
 > volume rebalance: store1: failed: Rebalance not started for volume 
store1.

> 
> Best Regards,
> Strahil Nikolov
> 

Best regards,
--
alexander iliev