[Gluster-users] Peers not connecting after changing IP address

[JF Le Fillâtre]

On 10/03/15 19:20, Alex Crow wrote:
> Hi all,
> 
> You can take this post as a warning to wear your glasses and
> double-check routing.
> 
> I had a few ip rule/ip route entries to direct traffic in and out of
> specific interfaces. The "office" range was under 172.18.x and the new
> datacenter was under 192.168.x. I'd not spotted that I'd changed the
> last two octets on my ip rule/route settings only on the "datacenter"
> range, so the "office" one had the first two octets from its original
> range and the last two from the DC range.
> 
> I have had this problem before, and I wonder if it's just my own brain
> or does anyone get confused between eg.:
> 
> 172.16.24.110
> 192.168.24.10
> 
> It's like my visual system can't parse the difference, especially when
> there are a few of them in a list together!
> 
> Apologies for wasting time and thanks to JF.

Don't mention it Alex, it happens to all of us from time to time. :)

Best,
JF

> Cheers
> 
> Alex
> 
> On 10/03/15 15:40, JF Le Fillâtre wrote:
>> On my setup: on the host from which I peer probed, it's all hostnames.
>> On the other hosts, it's all IPs.
>>
>> Can you check if it's the case on your setup too?
>>
>> Thanks,
>> JF
>>
>>
>> On 10/03/15 16:29, Alex Crow wrote:
>>> Hi,
>>>
>>> They only have the hostname:
>>>
>>> uuid=22b88f85-0554-419f-a279-980fceaeaf49
>>> state=3
>>> hostname1=zalma
>>>
>>> And pinging these hostnames give the correct IP. Still no connection
>>> though.
>>>
>>> Thanks,
>>>
>>> Alex
>>>
>>> On 10/03/15 15:04, JF Le Fillâtre wrote:
>>>> Hello,
>>>>
>>>> Check the files in the peer directory:
>>>>
>>>> /var/lib/glusterd/peers
>>>>
>>>> They contain the IP addresses of the peers.
>>>>
>>>> I haven't done it but I assume that if you update those files on all
>>>> servers you should be back online.
>>>>
>>>> Thanks,
>>>> JF
>>>>
>>>>
>>>> On 10/03/15 16:00, Alex Crow wrote:
>>>>> Hi,
>>>>>
>>>>> I've had a 4 node Dis/Rep cluster up and running for a while, but
>>>>> recently moved two of the nodes (the replicas of the other 2) to a
>>>>> nearby datacentre. The IP addresses of the moved two therefore
>>>>> changed,
>>>>> but I updated the /etc/hosts file on all four hosts to reflect the
>>>>> change (and the peers were all probed by name, not IP).
>>>>>
>>>>> However at each site the other two peers show as disconnected, even
>>>>> though the servers can all successfully talk to each other. Is there
>>>>> some way I can kick this back into life?
>>>>>
>>>>> Regards,
>>>>>
>>>>> Alex
>>>>>
> 
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-- 

 Jean-François Le Fillâtre
 -------------------------------
 HPC Systems Administrator
 LCSB - University of Luxembourg
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