This is a multi-part message in MIME format. --------------090201020805060107090008 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Hello Yaniv, we tried another small test - reboot two nodes from replica3 a1 ( 1HP12-R3A1P1 ) which keep master domain. All domains went down = master down, but master domain didn't move to another available domain ( eg. 2HP12-R3A1P1 ). It looks that "master domain" management isn't correct ( has a bug ?? ) regs. Pavel On 31.3.2016 14:30, Yaniv Kaul wrote:
Hi Pavel,
Thanks for the report. Can you begin with a more accurate description of your environment? 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?).
Are there any logs you can share with us?
I'm sure with more information, we'd be happy to look at the issue. Y.
On Thu, Mar 31, 2016 at 3:09 PM, paf1@email.cz <mailto:paf1@email.cz> <paf1@email.cz <mailto:paf1@email.cz>> wrote:
Hello, we tried the following test - with unwanted results
input: 5 node gluster A = replica 3 with arbiter 1 ( node1+node2+arbiter on node 5 ) B = replica 3 with arbiter 1 ( node3+node4+arbiter on node 5 ) C = distributed replica 3 arbiter 1 ( node1+node2, node3+node4, each arbiter on node 5) node 5 has only arbiter replica ( 4x )
TEST: 1) directly reboot one node - OK ( is not important which ( data node or arbiter node )) 2) directly reboot two nodes - OK ( if nodes are not from the same replica ) 3) directly reboot three nodes - yes, this is the main problem and a questions .... - rebooted all three nodes from replica "B" ( not so possible, but who knows ... ) - all VMs with data on this replica was paused ( no data access ) - OK - all VMs running on replica "B" nodes lost ( started manually, later )( datas on other replicas ) - acceptable BUT - !!! all oVIrt domains went down !! - master domain is on replica "A" which lost only one member from three !!! so we are not expecting that all domain will go down, especially master with 2 live members.
Results: - the whole cluster unreachable until at all domains up - depent of all nodes up !!! - all paused VMs started back - OK - rest of all VMs rebooted and runnig - OK
Questions: 1) why all domains down if master domain ( on replica "A" ) has two runnig members ( 2 of 3 ) ?? 2) how to fix that colaps without waiting to all nodes up ? ( in worste case if node has HW error eg. ) ?? 3) which oVirt cluster policy can prevent that situation ?? ( if any )
regs. Pavel
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--------------090201020805060107090008 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit <html> <head> <meta content="text/html; charset=utf-8" http-equiv="Content-Type"> </head> <body text="#000066" bgcolor="#FFFFFF"> 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> _______________________________________________<br> Users mailing list<br> <a moz-do-not-send="true" href="mailto:Users@ovirt.org">Users@ovirt.org</a><br> <a moz-do-not-send="true" href="http://lists.ovirt.org/mailman/listinfo/users" rel="noreferrer" target="_blank">http://lists.ovirt.org/mailman/listinfo/users</a><br> <br> </blockquote> </div> <br> </div> </blockquote> <br> </body> </html> --------------090201020805060107090008--