[Gluster-users] Duplicate UUID entries in "gluster peer status" command

[Atin Mukherjee]

On Mon, Nov 21, 2016 at 10:00 AM, ABHISHEK PALIWAL <abhishpaliwal at gmail.com>
wrote:

> Hi Atin,
>
> System is the embedded system and these dates are before the system get in
> timer sync.
>
> Yes, I have also seen these two files in peers directory on 002500 board
> and I want to know the reason why gluster creates the second file when
> there is old file is exist. Even when you see the content of the these file
> are same.
>
> Is it possible for gluster if we fall in this situation then instead of
> manually doing the steps which you mentioned above gluster will take care
> of this?
>

We shouldn't have any unwanted data in /var/lib/glusterd at first place and
that's a prerequisite of gluster installation failing which inconsistencies
of configuration data can't be handled automatically until manual
intervention.


>
> I have some questions:
>
> 1. based on the logs can we find out the reason for having two peers files
> with same contents.
>

No we can't as the log file doesn't have any entry of
26ae19a6-b58f-446a-b079-411d4ee57450 which indicates that this entry is a
stale one and was (is) there since long time and the log files are the
latest.

2. is there any way to do it from gluster code.
>

Ditto as above.


>
> Regards,
> Abhishek
>
> Regards,
> Abhishek
>
> On Mon, Nov 21, 2016 at 9:52 AM, Atin Mukherjee <amukherj at redhat.com>
> wrote:
>
>> atin at dhcp35-96:~/Downloads/gluster_users/abhishek_dup_uuid/
>> duplicate_uuid/glusterd_2500/peers$ ls -lrt
>> total 8
>> -rw-------. 1 atin wheel 71 *Jan  1  1970* 5be8603b-18d0-4333-8590-38f918
>> a22857
>> -rw-------. 1 atin wheel 71 Nov 18 03:31 26ae19a6-b58f-446a-b079-411d4e
>> e57450
>>
>> In board 2500 look at the date of the file 5be8603b-18d0-4333-8590-38f918a22857
>> (marked in bold). Not sure how did you end up having this file in such time
>> stamp. I am guessing this could be because of the set up been not cleaned
>> properly at the time of re-installation.
>>
>> Here is the steps what I'd recommend for now:
>>
>> 1. rename 26ae19a6-b58f-446a-b079-411d4ee57450 to
>> 5be8603b-18d0-4333-8590-38f918a22857, you should have only one entry in
>> the peers folder in board 2500.
>> 2. Bring down both glusterd instances
>> 3. Bring back one by one
>>
>> And then restart glusterd to see if the issue persists.
>>
>>
>>
>> On Mon, Nov 21, 2016 at 9:34 AM, ABHISHEK PALIWAL <
>> abhishpaliwal at gmail.com> wrote:
>>
>>> Hope you will see in the logs......
>>>
>>> On Mon, Nov 21, 2016 at 9:17 AM, ABHISHEK PALIWAL <
>>> abhishpaliwal at gmail.com> wrote:
>>>
>>>> Hi Atin,
>>>>
>>>> It is not getting wipe off we have changed the configuration path from
>>>> /var/lib/glusterd to /system/glusterd.
>>>>
>>>> So, they will remain as same as previous.
>>>>
>>>> On Mon, Nov 21, 2016 at 9:15 AM, Atin Mukherjee <amukherj at redhat.com>
>>>> wrote:
>>>>
>>>>> Abhishek,
>>>>>
>>>>> rebooting the board does wipe of /var/lib/glusterd contents in your
>>>>> set up right (as per my earlier conversation with you) ? In that case, how
>>>>> are you ensuring that the same node gets back the older UUID? If you don't
>>>>> then this is bound to happen.
>>>>>
>>>>> On Mon, Nov 21, 2016 at 9:11 AM, ABHISHEK PALIWAL <
>>>>> abhishpaliwal at gmail.com> wrote:
>>>>>
>>>>>> Hi Team,
>>>>>>
>>>>>> Please lookinto this problem as this is very widely seen problem in
>>>>>> our system.
>>>>>>
>>>>>> We are having the setup of replicate volume setup with two brick but
>>>>>> after restarting the second board I am getting the duplicate entry in
>>>>>> "gluster peer status" command like below:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> *# gluster peer status Number of Peers: 2  Hostname: 10.32.0.48 Uuid:
>>>>>> 5be8603b-18d0-4333-8590-38f918a22857 State: Peer in Cluster (Connected)
>>>>>>  Hostname: 10.32.0.48 Uuid: 5be8603b-18d0-4333-8590-38f918a22857 State:
>>>>>> Peer in Cluster (Connected) # *
>>>>>>
>>>>>> I am attaching all logs from both the boards and the command outputs
>>>>>> as well.
>>>>>>
>>>>>> So could you please check what is the reason to get in this situation
>>>>>> as it is very frequent in multiple case.
>>>>>>
>>>>>> Also, we are not replacing any board from setup just rebooting.
>>>>>>
>>>>>> --
>>>>>>
>>>>>> Regards
>>>>>> Abhishek Paliwal
>>>>>>
>>>>>> _______________________________________________
>>>>>> Gluster-users mailing list
>>>>>> Gluster-users at gluster.org
>>>>>> http://www.gluster.org/mailman/listinfo/gluster-users
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>>
>>>>> ~ Atin (atinm)
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>>
>>>>
>>>>
>>>>
>>>> Regards
>>>> Abhishek Paliwal
>>>>
>>>
>>>
>>>
>>> --
>>>
>>>
>>>
>>>
>>> Regards
>>> Abhishek Paliwal
>>>
>>
>>
>>
>> --
>>
>> ~ Atin (atinm)
>>
>
>
>
> --
>
>
>
>
> Regards
> Abhishek Paliwal
>



-- 

~ Atin (atinm)
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