[Gluster-users] add-brick and fix-layout takes some VMs offline

[Nicholas Majeran]

Sorry for the delay -- here's what the volume looks like. It's pretty basic: 



volume elkguests0-server 
type protocol/server 
option rpc-auth-allow-insecure on 
option auth.addr./mnt/bulk.allow * 
option auth.login.39da7ae0-8cee-4152-a612-674c48da544e.password 62a8ff81-cd3d-4872-a9b9-bad5da242f10 
option auth.login./mnt/bulk.allow 39da7ae0-8cee-4152-a612-674c48da544e 
option transport-type tcp 
subvolumes /mnt/bulk 
end-volume 



type=2 
count=6 
status=1 
sub_count=2 
stripe_count=1 
replica_count=2 
version=12 
transport-type=0 
volume-id=7c50ebe2-337b-4bed-a53b-5fa706150b26 
username=39da7ae0-8cee-4152-a612-674c48da544e 
password=62a8ff81-cd3d-4872-a9b9-bad5da242f10 
op-version=2 
client-op-version=2 
server.allow-insecure=on 
nfs.disable=0 
brick-0=fs-elkpo01.suntradingllc.com:-mnt-bulk 
brick-1=fs-elkpo02.suntradingllc.com:-mnt-bulk 
brick-2=fs-elkpo03.suntradingllc.com:-mnt-bulk 
brick-3=fs-elkpo04.suntradingllc.com:-mnt-bulk 
brick-4=fs-elkpo05.suntradingllc.com:-mnt-bulk 
brick-5=fs-elkpo06.suntradingllc.com:-mnt-bulk 


I'll try and dig up some client logs, but the last event was over a month ago. 
----- Original Message -----

From: "Vijay Bellur" <vbellur at redhat.com> 
To: "Nicholas Majeran" <nmajeran at suntradingllc.com>, gluster-users at gluster.org, "Shyamsundar Ranganathan" <srangana at redhat.com> 
Sent: Monday, February 17, 2014 10:16:56 AM 
Subject: Re: [Gluster-users] add-brick and fix-layout takes some VMs offline 

On 02/13/2014 08:52 PM, Nicholas Majeran wrote: 
> Hi there, 
> 
> We have a distributed-replicated volume hosting KVM guests running 
> Gluster 3.4.1. 
> We've grown from 1 x 2 -> 2 x 2 -> 3 x 2,but each time we've added nodes 
> or run a fix layout, 
> some of our guests go offline (or worse with error=continue they 
> silently error). 
> After the last addition we didn't even run fix-layout as the guests are 
> becoming increasingly important. 

Would it be possible to share the client log files and your volume 
configuration? 

> 
> Those guests are currently are using a combination of FUSE and libgfapi. 
> Is there a setting or group of settings we should use to ameliorate this 
> problem? 
> Is FUSE or libgfapi more forgiving when add-brick or fix-layout is run? 
> 

The behavior of FUSE or libgfapi should mostly be the same with either 
add-brick or fix-layout. 

Thanks, 
Vijay 


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