=20 =20 From: "Alexandru Vladulescu" <avladulescu@bfproject.ro> To: "users" <users@ovirt.org> Sent: Friday, January 11, 2013 2:47:38 PM Subject: [Users] Testing High Availability and Power outages =20 =20 Hi, =20 =20 Today, I started testing on my Ovirt 3.1 installation (from dreyou repos) r= unning on 3 x Centos 6.3 hypervisors the High Availability features and the f= ence mechanism. =20 As yesterday, I have reported in a previous email thread, that the migrati= on priority queue cannot be increased (bug) in this current version, I decid= ed to test what the official documentation says about the High Availability c= ases.=20 =20 This will be a disaster case scenarios to suffer from if one hypervisor ha= s a power outage/hardware problem and the VMs running on it are not migratin= g on other spare resources. =20 =20 In the official documenation from ovirt.org it is quoted the following: High availability =20 Allows critical VMs to be restarted on another host in the event of hardwa= re failure with three levels of priority, taking into account resiliency pol= icy. =20 Resiliency policy to control high availability VMs at the cluster level. Supports application-level high availability with supported fencing agents= . =20 As well as in the Architecture description: =20 High Availability - restart guest VMs from failed hosts automatically on o=
--Apple-Mail-2--344998072 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii Dear Doron, I haven't collected the logs from the tests, but I would gladly re-do the ca= se and get back to you asap.=20 This feature is the main reason of which I have chosen to go with Ovirt in t= he first place, besides other virt environments. Could you please inform me what logs should I be focusing on, besides the en= gine log; vdsm maybe or other relevant logs? Regards, Alex -- Sent from phone. On 13.01.2013, at 09:56, Doron Fediuck <dfediuck@redhat.com> wrote: ther hosts
=20 =20 =20 So the testing went like this -- One VM running a linux box, having the ch= eck box "High Available" and "Priority for Run/Migration queue:" set to Low.= On Host we have the check box to "Any Host in Cluster", without "Allow VM m= igration only upon Admin specific request" checked. =20 =20 =20 My environment: =20 =20 Configuration : 2 x Hypervisors (same cluster/hardware configuration) ; 1= x Hypervisor + acting as a NAS (NFS) server (different cluster/hardware con= figuration) =20 Actions: Went and cut-off the power from one of the hypervisors from the 2= node clusters, while the VM was running on. This would translate to a power= outage. =20 Results: The hypervisor node that suffered from the outage is showing in H= osts tab as Non Responsive on Status, and the VM has a question mark and can= not be powered off or nothing (therefore it's stuck). =20 In the Log console in GUI, I get:=20 =20 Host Hyper01 is non-responsive. VM Web-Frontend01 was set to the Unknown status. =20 There is nothing I could I could do besides clicking on the Hyper01 "Confi= rm Host as been rebooted", afterwards the VM starts on the Hyper02 with a co= ld reboot of the VM. =20 The Log console changes to: =20 Vm Web-Frontend01 was shut down due to Hyper01 host reboot or manual fence=
All VMs' status on Non-Responsive Host Hyper01 were changed to 'Down' by a= dmin@internal Manual fencing for host Hyper01 was started. VM Web-Frontend01 was restarted on Host Hyper02 =20 =20 I would like you approach on this problem, reading the documentation & fea= tures pages on the official website, I suppose that this would have been an a= utomatically mechanism working on some sort of a vdsm & engine fencing actio= n. Am I missing something regarding it ? =20 =20 Thank you for your patience reading this. =20 =20 Regards, Alex. =20 =20 =20 =20 _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users Hi Alex, Can you share with us the engine's log from the relevant time period? =20 Doron
--Apple-Mail-2--344998072 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 <html><body bgcolor=3D"#FFFFFF"><div>Dear Doron,</div><div><br></div><div>I h= aven't collected the logs from the tests, but I would gladly re-do the case a= nd get back to you asap. </div><div><br></div><div>This feature is the m= ain reason of which I have chosen to go with Ovirt in the first place, besid= es other virt environments.</div><div><br></div><div>Could you please inform= me what logs should I be focusing on, <span class=3D"Apple-style-span"= style=3D"-webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-c= omposition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-fr= ame-color: rgba(77, 128, 180, 0.230469); ">besides the engine log; vdsm mayb= e or other relevant logs?</span></div><div><br><div><div>Regards,</div><div>= Alex</div></div><div><br></div><div><br></div><div><span class=3D"Apple-styl= e-span" style=3D"-webkit-tap-highlight-color: rgba(26, 26, 26, 0.292969); -w= ebkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composi= tion-frame-color: rgba(77, 128, 180, 0.230469);">--</span></div><div><span c= lass=3D"Apple-style-span" style=3D"-webkit-tap-highlight-color: rgba(26, 26,= 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469= ); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469); ">Sent fro= m phone.</span></div></div><div><br>On 13.01.2013, at 09:56, Doron Fediuck &= lt;<a href=3D"mailto:dfediuck@redhat.com">dfediuck@redhat.com</a>> wrote:= <br><br></div><div></div><blockquote type=3D"cite"><div><div style=3D"font-f= amily: times new roman,new york,times,serif; font-size: 12pt; color: #000000= "><br><br><hr id=3D"zwchr"><blockquote style=3D"border-left:2px solid rgb(16= , 16, 255);margin-left:5px;padding-left:5px;color:#000;font-weight:normal;fo= nt-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;= font-size:12pt;"><b>From: </b>"Alexandru Vladulescu" <<a href=3D"mailto:a= vladulescu@bfproject.ro">avladulescu@bfproject.ro</a>><br><b>To: </b>"use= rs" <<a href=3D"mailto:users@ovirt.org">users@ovirt.org</a>><br><b>Sen= t: </b>Friday, January 11, 2013 2:47:38 PM<br><b>Subject: </b>[Users] Testin= g High Availability and Power outages<br><br> =20 =20 =20 =20 <br> Hi,<br> <br> <br> Today, I started testing on my Ovirt 3.1 installation (from dreyou repos) running on 3 x Centos 6.3 hypervisors the High Availability features and the fence mechanism.<br> <br> As yesterday, I have reported in a previous email thread, that the migration priority queue cannot be increased (bug) in this current version, I decided to test what the official documentation says about the High Availability cases. <br> <br> This will be a disaster case scenarios to suffer from if one hypervisor has a power outage/hardware problem and the VMs running on it are not migrating on other spare resources.<br> <br> <br> In the official documenation from <a href=3D"http://ovirt.org">ovirt.org= </a> it is quoted the following:<br> <h3> <span class=3D"mw-headline" id=3D"High_availability"> <font color=3D= "#333399"><i><small>High availability </small></i></font></span></h3> <font color=3D"#333399"><i><small> </small></i></font> <p><font color=3D"#333399"><i><small>Allows critical VMs to be restarted on another host in the event of hardware failure with three levels of priority, taking into account resiliency policy. </small></i></font></p> <font color=3D"#333399"><i><small> </small></i></font> <ul> <li><font color=3D"#333399"><i><small> Resiliency policy to control high availability VMs at the cluster level. </small></i></font></li> <li><font color=3D"#333399"><i><small> Supports application-level high availability with supported fencing agents. </small></i></font></li> </ul> <br> As well as in the Architecture description:<br> <font color=3D"#333399"><br> <small><i>High Availability - restart guest VMs from failed hosts automatically on other hosts</i></small></font><br> <br> <br> <br> So the testing went like this -- One VM running a linux box, having the check box "High Available" and "Priority for Run/Migration queue:" set to Low. On Host we have the check box to "Any Host in Cluster", without "Allow VM migration only upon Admin specific request" checked.<br> <br> <br> <br> My environment:<br> <br> <br> Configuration : 2 x Hypervisors (same cluster/hardware configuration) ; 1 x Hypervisor + acting as a NAS (NFS) server (different cluster/hardware configuration)<br> <br> Actions: Went and cut-off the power from one of the hypervisors from the 2 node clusters, while the VM was running on. This would translate to a power outage.<br> <br> Results: The hypervisor node that suffered from the outage is showing in Hosts tab as Non Responsive on Status, and the VM has a question mark and cannot be powered off or nothing (therefore it's stuck).<br> <br> In the Log console in GUI, I get: <br> <br> =20 =20 <span style=3D"color: rgb(255, 255, 255); font-family: 'Arial Unicode MS', Arial, sans-serif; font-size: small; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 26px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: nowrap; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(102, 102, 102); display: inline !important; float: none; ">Host Hyper01 is non-responsive.</span><br> =20 <span style=3D"color: rgb(255, 255, 255); font-family: 'Arial Unicode MS', Arial, sans-serif; font-size: small; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 26px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: nowrap; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(102, 102, 102); display: inline !important; float: none; ">VM Web-Frontend01 was set to the Unknown status.</span><br> =20 <br> There is nothing I could I could do besides clicking on the Hyper01 "Confirm Host as been rebooted", afterwards the VM starts on the Hyper02 with a cold reboot of the VM.<br> <br> The Log console changes to:<br> <br> =20 <span style=3D"color: rgb(255, 255, 255); font-family: 'Arial Unicode MS', Arial, sans-serif; font-size: small; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 26px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: nowrap; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(102, 102, 102); display: inline !important; float: none; ">Vm Web-Frontend01 was shut down due to Hyper01 host reboot or manual fence</span><br> =20 <span style=3D"color: rgb(255, 255, 255); font-family: 'Arial Unicode MS', Arial, sans-serif; font-size: small; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 26px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: nowrap; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(102, 102, 102); display: inline !important; float: none; ">All VMs' status on Non-Responsive Host Hyper01 were changed to 'Down' by admin@internal</span><br> =20 <span style=3D"color: rgb(255, 255, 255); font-family: 'Arial Unicode MS', Arial, sans-serif; font-size: small; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 26px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: nowrap; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(102, 102, 102); display: inline !important; float: none; ">Manual fencing for host Hyper01 was started.</span><br> =20 <span style=3D"color: rgb(255, 255, 255); font-family: 'Arial Unicode MS', Arial, sans-serif; font-size: small; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 26px; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: nowrap; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(102, 102, 102); display: inline !important; float: none; ">VM Web-Frontend01 was restarted on Host Hyper02</span><br> <br> <br> I would like you approach on this problem, reading the documentation & features pages on the official website, I suppose that this would have been an automatically mechanism working on some sort of a vdsm & engine fencing action. Am I missing something regarding it ?<br> <br> <br> Thank you for your patience reading this.<br> <br> <br> Regards,<br> Alex.<br> <br> <br> <br> =20 <br>_______________________________________________<br>Users mailing list<br=
<a href=3D"mailto:Users@ovirt.org">Users@ovirt.org</a><br>http://lists.ovir= t.org/mailman/listinfo/users<br></blockquote>Hi Alex,<br>Can you share with u= s the engine's log from the relevant time period?<br><br>Doron<br></div></di= v></blockquote></body></html>=
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