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</o:shapelayout></xml><![endif]--></head><body lang=DE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>sometimes one hypervisors status turns to „Non-operational“ with error “STORAGE_DOMAIN_UNREACHABLE” and the live-migration (activated for all VMs) is starting.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>I don’t currently know why the ovirt-node turns to this status, because the connected iSCSI SAN is available all the time(checked via iscsi session and lsblk), I’m also able to r/w on the SAN during that time. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>We can simply activate this ovirt-node and it turns up again. The migration process is running from scratch and hitting the some error </span><span lang=EN-US style='font-family:Wingdings'>à</span><span lang=EN-US> Reboot of ovirt-node necessary!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>When a hypervisor turns to “non-operational” status, the live migration is starting and tries to migrate ~25 VMs (~ 100 GB RAM to migrate).<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>During that process the network workload goes 100%, some VMs will be migrated, then the destination host also turns to “non-operational” status with error “STORAGE_DOMAIN_UNREACHABLE”.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Many VMs are still running on their origin host, some are paused, some are showing “migration from” status.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>After a reboot of the origin host, the VMs turns of course into unknown state.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>So the whole cluster is down :/<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>For this problem I have some questions:<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span lang=EN-US><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>Does ovirt engine just use the ovirt-mgmt network for migration/HA? <o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span lang=EN-US><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>If so, is there any possibility to <b>add</b>/switch a network for migration/HA?<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span lang=EN-US><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>Is the kind of way we are using the live-migration not recommended?<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span lang=EN-US><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>Which engine module checks the availability of the storage domain for the ovirt-nodes?<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span lang=EN-US><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>Is there any timeout/cache option we can set/increase to avoid this problem?<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span lang=EN-US><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>Is there any known problem with the versions we are using? (Migration to ovirt-engine 3.1 is not possible atm)<o:p></o:p></span></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo2'><![if !supportLists]><span lang=EN-US><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span lang=EN-US>Is it possible to modify the migration queue to just migrate a max. of 4 VMs at the same time for example?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><u><span lang=EN-US>ovirt-engine: <o:p></o:p></span></u></p><p class=MsoNormal><span lang=EN-US>FC 16: 3.3.6-3.fc16.x86_64<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Engine: <span class=gwt-inlinelabel>3.0.0_0001-1.6.fc16</span></span><span class=gwt-inlinelabel><o:p></o:p></span></p><p class=MsoNormal><span class=gwt-inlinelabel><span lang=EN-US>KVM based VM: 2 vCPU, 4 GB RAM<o:p></o:p></span></span></p><p class=MsoNormal><span class=gwt-inlinelabel><span lang=EN-US>1 NIC for ssh/https access<br>1 NIC for ovirtmgmt network access<br>engine source: dreyou repo<o:p></o:p></span></span></p><p class=MsoNormal><span class=gwt-inlinelabel><span lang=EN-US><o:p> </o:p></span></span></p><p class=MsoNormal><span class=gwt-inlinelabel><u><span lang=EN-US>ovirt-node:</span></u></span><span class=gwt-inlinelabel><span lang=EN-US><br>Node: 2.3.0<br>2 bonded NICs -> Frontend Network<br>4 Multipath NICs -> SAN connection</span></span><o:p></o:p></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Attached some relevant logfiles.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Thanks in advance, I really appreciate your help!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Best,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#5A5A5A;mso-fareast-language:DE'>Sven Knohsalla </span><span lang=EN-US style='color:#C00000;mso-fareast-language:DE'>|</span><span lang=EN-US style='color:#5A5A5A;mso-fareast-language:DE'> System Administration<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:gray;mso-fareast-language:DE'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:9.0pt;color:#5A5A5A;mso-fareast-language:DE'>Office +49 631 68036 433 | Fax +49 631 68036 111 |E-Mail</span><span lang=EN-US style='font-size:9.0pt;color:#505050;mso-fareast-language:DE'> </span><span lang=EN-US style='font-size:9.0pt;color:#BF000D;mso-fareast-language:DE'><a href="mailto:s.knohsalla@netbiscuits.com">s.knohsalla@netbiscuits.com</a></span><span lang=EN-US style='font-size:9.0pt;color:#5A5A5A;mso-fareast-language:DE'> | Skype: </span><span lang=EN-US style='font-size:9.0pt;color:#BF000D;mso-fareast-language:DE'>Netbiscuits.admin</span><span lang=EN-US style='font-size:9.0pt;color:#5A5A5A;mso-fareast-language:DE'> <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;color:#5A5A5A;mso-fareast-language:DE'>Netbiscuits GmbH | Europaallee 10 | 67657 | GERMANY<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>