
<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I've also noticed that if you don't want to deal with extra pain, make sure you don't mount directly the volume within the instances when it starts (I'm thinking about the fstab file that would mount a volume exposed by nova-volume)<div>If you need for specific reason to have it mounted, rely more on labeling rather than /dev/path.</div><div>I'm myself managing the volume mounting after I made sure the hypervisor has it's iscsi sessions working.</div><div><br><div apple-content-edited="true">

<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: 'Lucida Grande'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="font-family: Helvetica; "><span class="Apple-style-span" style="font-family: Helvetica; "><b style="color: rgb(19, 112, 138); ">Nuage & Co - Razique Mahroua</b></span><span class="Apple-style-span" style="color: rgb(19, 112, 138); font-family: Helvetica; "><b> </b></span><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><span class="Apple-style-span" style="border-collapse: separate; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-weight: normal; font-style: normal; "><font class="Apple-style-span" color="#13708a"><a href="mailto:razique.mahroua@gmail.com">razique.mahroua@gmail.com</a></font></div></span><br class="Apple-interchange-newline"><span></span><span style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-weight: normal; font-style: normal; "></span><span style="color: rgb(0, 0, 0); font-weight: normal; "></span></span><span><img height="125" width="125" id="7d5dd281-526c-449c-a449-c1aa9e13e014" apple-width="yes" apple-height="yes" src="cid:00E07450-433E-43E6-9005-48B8FD5C669F@la.fabrique"></span>

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<br><div><div>Le 12 mars 2012 角 16:00, Razique Mahroua a 谷crit :</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I explained in the doc how I deal with disasters - basically, a magic solution doesn't exist- nova not being environment-aware.<div><a href="http://docs.openstack.org/trunk/openstack-compute/admin/content/nova-disaster-recovery-process.html">http://docs.openstack.org/trunk/openstack-compute/admin/content/nova-disaster-recovery-process.html</a></div><div>Regarding the flag, you can safely use it when your instances usage doesn't imply the nova-volume usage, that one making every hypervisor dependant to the iscsi sessions. Which are quite a pain, but necessary in that current implementation.</div><div><br></div><div><br><div apple-content-edited="true">

<span class="Apple-style-span" style="font-family: Helvetica; "><span class="Apple-style-span" style="font-family: Helvetica; "><b style="color: rgb(19, 112, 138); ">Nuage & Co - Razique Mahroua</b></span><span class="Apple-style-span" style="color: rgb(19, 112, 138); font-family: Helvetica; "><b> </b></span><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><span class="Apple-style-span" style="border-collapse: separate; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-weight: normal; font-style: normal; "><font class="Apple-style-span" color="#13708a"><a href="mailto:razique.mahroua@gmail.com">razique.mahroua@gmail.com</a></font></div></span><br class="Apple-interchange-newline"><span></span><span style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-weight: normal; font-style: normal; "></span><span style="color: rgb(0, 0, 0); font-weight: normal; "></span></span><span><span><NUAGECO-LOGO-Fblan_petit.jpg></span></span>

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<br><div><div>Le 12 mars 2012 角 15:38, David Kranz a 谷crit :</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>A while back I saw a comment about this in<br><a href="http://mirantis.blogspot.com/2011/06/openstack-nova-basic-disaster-recovery.html">http://mirantis.blogspot.com/2011/06/openstack-nova-basic-disaster-recovery.html</a><br>which suggests that setting these flags may not always be a good idea.<br>If this is what should be done, why are these flags false by default?<br>Perhaps a nova expert can comment.<br><br>More generally, I haven't seen much documentation in nova about how to<br>deal with various failure scenarios. There is a lot more information<br>about this for Swift and there were some sessions at the last design<br>summit that provided a lot of useful information about the mechanics of<br>operating a real Swift cluster. I think such a session for nova at the<br>upcoming summit would be very useful as well.<br><br>-David<br><br><br><br>On 3/12/2012 10:14 AM, Christian Wittwer wrote:<br><blockquote type="cite">You can let nova-compute start the instances after a host reboot.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">--start_guests_on_host_boot<br></blockquote><blockquote type="cite">--resume_guests_state_on_host_boot<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">2012/3/10 Vishvananda Ishaya <<a href="mailto:vishvananda@gmail.com">vishvananda@gmail.com</a>>:<br></blockquote><blockquote type="cite"><blockquote type="cite">I think that this branch should make reboot work:<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><a href="https://review.openstack.org/#change,5177">https://review.openstack.org/#change,5177</a><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">It looks like we should also make sync_power_states run more frequently.  It<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">currently runs every 6 minutes by default.<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">On Mar 8, 2012, at 6:27 PM, DeadSun wrote:<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">As we all know, if host reboot since of some failure or hardware problem,<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">the vms will actually shutoff. But after host up, info in nova db show vm<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">state are "active", and using "nova list" return the same.<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Now how to start the vms. In Daiblo, I always just using "nova reboot", it<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">works.But in essex version, it seems cannot use "nova reboot" in an inactive<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">domain. I see there is "nova host-action" command, but it not always make vm<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">start.<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Another way, I can use "virsh start" a domain, but if the vm attach a<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">volume, it doesn't work. "nova volume-detach" cannot detach a volume in an<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">inactive domain.<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Is there a normal way to resolve this case?<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">--<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">準筏情拸眕隴祩ㄛ準譴噙拸眕祡堈<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">_______________________________________________<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Mailing list: <a href="https://launchpad.net/~openstack">https://launchpad.net/~openstack</a><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Post to     : <a href="mailto:openstack@lists.launchpad.net">openstack@lists.launchpad.net</a><br></blockquote></blockquote><blockquote type="cite"><blockquote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