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Hello Yaniv,<br>
<br>
we tried another small test - reboot two nodes from replica3 a1 (
1HP12-R3A1P1 ) which keep master domain.<br>
All domains went down = master down, but master domain didn't move
to another available domain ( eg. 2HP12-R3A1P1 ).<br>
<br>
It looks that "master domain" management isn't correct ( has a bug
?? )<br>
<br>
regs.<br>
Pavel<br>
<br>
<br>
<div class="moz-cite-prefix">On 31.3.2016 14:30, Yaniv Kaul wrote:<br>
</div>
<blockquote
cite="mid:CAJgorsaOUQ_42GUSPh-H1vGUgJ114JYcUHR8vHwvmcWR+w8Jmw@mail.gmail.com"
type="cite">
<div dir="ltr">Hi Pavel,
<div><br>
</div>
<div>Thanks for the report. Can you begin with a more accurate
description of your environment?</div>
<div>Begin with host, oVirt and Gluster versions. Then continue
with the exact setup (what are 'A', 'B', 'C' - domains?
Volumes? What is the mapping between domains and volumes?).</div>
<div><br>
</div>
<div>Are there any logs you can share with us?</div>
<div><br>
</div>
<div>I'm sure with more information, we'd be happy to look at
the issue.</div>
<div>Y.</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Thu, Mar 31, 2016 at 3:09 PM, <a
moz-do-not-send="true" href="mailto:paf1@email.cz">paf1@email.cz</a>
<span dir="ltr"><<a moz-do-not-send="true"
href="mailto:paf1@email.cz" target="_blank">paf1@email.cz</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000066" bgcolor="#FFFFFF"> Hello, <br>
we tried the following test - with unwanted results<br>
<br>
input:<br>
5 node gluster<br>
A = replica 3 with arbiter 1 ( node1+node2+arbiter on node
5 )<br>
B = replica 3 with arbiter 1 ( node3+node4+arbiter on node
5 )<br>
C = distributed replica 3 arbiter 1 ( node1+node2,
node3+node4, each arbiter on node 5)<br>
node 5 has only arbiter replica ( 4x )<br>
<br>
TEST:<br>
1) directly reboot one node - OK ( is not important which
( data node or arbiter node ))<br>
2) directly reboot two nodes - OK ( if nodes are not
from the same replica ) <br>
3) directly reboot three nodes - yes, this is the main
problem and a questions ....<br>
- rebooted all three nodes from replica "B" ( not so
possible, but who knows ... )<br>
- all VMs with data on this replica was paused ( no
data access ) - OK<br>
- all VMs running on replica "B" nodes lost ( started
manually, later )( datas on other replicas ) - acceptable<br>
BUT<br>
- !!! all oVIrt domains went down !! - master domain
is on replica "A" which lost only one member from three
!!!<br>
so we are not expecting that all domain will go down,
especially master with 2 live members.<br>
<br>
Results: <br>
- the whole cluster unreachable until at all domains
up - depent of all nodes up !!!<br>
- all paused VMs started back - OK<br>
- rest of all VMs rebooted and runnig - OK<br>
<br>
Questions:<br>
1) why all domains down if master domain ( on replica
"A" ) has two runnig members ( 2 of 3 ) ??<br>
2) how to fix that colaps without waiting to all nodes
up ? ( in worste case if node has HW error eg. ) ??<br>
3) which oVirt cluster policy can prevent that
situation ?? ( if any )<br>
<br>
regs.<br>
Pavel<br>
<br>
<br>
</div>
<br>
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</blockquote>
</div>
<br>
</div>
</blockquote>
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