Gluster users - Feb 2017 - Moving a physical disk from one machine to another

Apologies if this is obvious but I?ve searched the documentation and mailing
list and can?t see an answer.

One of my  servers which hosts a gluster brick has died beyond possible saving.
The physical disk of the brick itself is good and I?d like not to lose anything.

Can I just add it as a brick on another server? Unfortunately, I am not able to
host the disk on a machine with the same IP address/host name. I suppose I could
just add a new empty disk and then copy the data from the old disk but I?d
prefer to do things as easily as possible.

Scott



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On 02/06/2017 11:11 AM, Scott Hazelhurst wrote:
> Apologies if this is obvious but I?ve searched the documentation and
mailing list and can?t see an answer.
>
> One of my  servers which hosts a gluster brick has died beyond possible
saving. The physical disk of the brick itself is good and I?d like not to lose
anything.
>
> Can I just add it as a brick on another server? Unfortunately, I am not
able to host the disk on a machine with the same IP address/host name. I suppose
I could just add a new empty disk and then copy the data from the old disk but
I?d prefer to do things as easily as possible.
>
> Scott
>
>
>
> <table width="100%" border="0"
cellspacing="0" cellpadding="0"
style="width:100%;">
> <tr>
> <td align="left"
style="text-align:justify;"><font
face="arial,sans-serif" size="1"
color="#999999"><span style="font-size:11px;">This
communication is intended for the addressee only. It is confidential. If you
have received this communication in error, please notify us immediately and
destroy the original message. You may not copy or disseminate this communication
without the permission of the University. Only authorised signatories are
competent to enter into agreements on behalf of the University and recipients
are thus advised that the content of this message may not be legally binding on
the University and may contain the personal views and opinions of the author,
which are not necessarily the views and opinions of The University of the
Witwatersrand, Johannesburg. All agreements between the University and outsiders
are subject to South African Law unless the University agrees in writing to the
contrary. </span></font></td>
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Did this a few months ago, when I had a server die.

Assuming it is a replicated volume, first thing is to remove old brick from 
your volume.  It has been a while since I had to do this, but I think you 
just do a "gluster remove-brick  ".  It will probably require a
'force'
since the server is gone.

You should be able to install the disk in another server (with gluster 
installed).

Then just add that brick to the volume, like you did when setting up the 
volume.  You will again have to force, because the volume will already have 
a volume signature.

After that do a full heal, and wait.  It will save a good bit of time that 
the files are already on the disk.  It should add any files that have been 
changed, and then go on its way.  You may want to be sure that any files 
deleted since the server died don't get put back into the volume.  Have had 
that happen, but don't remember if this was the combination that triggered 
it, or something else.

Ted Miller
Indiana, USA