<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 href="mailto:paf1@email.cz">paf1@email.cz</a> <span dir="ltr"><<a 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>
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<br></blockquote></div><br></div>