<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-family: Calibri, sans-serif; "><div>Hi,</div><div>Plesae note that regarding the Vmware driver the maintenance mode only works with the ESX driver and not the VC driver. For the VC driver there is a patch in review - <a href="https://review.openstack.org/#/c/72143">https://review.openstack.org/#/c/72143</a>/</div><div>Thanks</div><div>Gary</div><div><br></div><span id="OLK_SRC_BODY_SECTION"><div style="font-family:Calibri; font-size:11pt; text-align:left; color:black; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt"><span style="font-weight:bold">From: </span> Jay Lau <<a href="mailto:jay.lau.513@gmail.com">jay.lau.513@gmail.com</a>><br><span style="font-weight:bold">Reply-To: </span> "OpenStack Development Mailing List (not for usage questions)" <<a href="mailto:openstack-dev@lists.openstack.org">openstack-dev@lists.openstack.org</a>><br><span style="font-weight:bold">Date: </span> Sunday, February 23, 2014 3:14 AM<br><span style="font-weight:bold">To: </span> "OpenStack Development Mailing List (not for usage questions)" <<a href="mailto:openstack-dev@lists.openstack.org">openstack-dev@lists.openstack.org</a>><br><span style="font-weight:bold">Subject: </span> Re: [openstack-dev] [nova][libvirt] Is there anything blocking the libvirt driver from implementing the host_maintenance_mode API?<br></div><div><br></div><div><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><div><div dir="ltr"><div><div>So there is no need to implement libvirt driver for the host_maintenance_mode API as host_maintenance_mode is mainly for VMWare and XenServer, also we can use evacuate and os-services/disable for libvirt host maintain, right?<br><br></div>
Thanks,<br><br></div>
Jay<br><br></div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-02-23 5:22 GMT+08:00 Bruce Montague <span dir="ltr">
<<a href="mailto:Bruce_Montague@symantec.com" target="_blank">Bruce_Montague@symantec.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
On Fri Feb 21 21:14:56 UTC 2014 Joe Gordon <joe.gordon0 at <a href="https://urldefense.proofpoint.com/v1/url?u=http://gmail.com&k=oIvRg1%2BdGAgOoM1BIlLLqw%3D%3D%0A&r=eH0pxTUZo8NPZyF6hgoMQu%2BfDtysg45MkPhCZFxPEq8%3D%0A&m=qZox2RtL9TtyfQTCmPHLVKpeImL2Fe1NG33oxxlIFTU%3D%0A&s=aa22811e8ac28f6361f9a621b6fddd174c06e474b0585238e1ef7d294f5fe501" target="_blank">
gmail.com</a>> wrote:<br><div class=""><br>
> On Thu, Feb 20, 2014 at 9:38 AM, Matt Riedemann <mriedem at <a href="https://urldefense.proofpoint.com/v1/url?u=http://linux.vnet.ibm.com&k=oIvRg1%2BdGAgOoM1BIlLLqw%3D%3D%0A&r=eH0pxTUZo8NPZyF6hgoMQu%2BfDtysg45MkPhCZFxPEq8%3D%0A&m=qZox2RtL9TtyfQTCmPHLVKpeImL2Fe1NG33oxxlIFTU%3D%0A&s=d0e9aac9517d6900c84731a432cf9180404b53911f3b683c6d41860465926d44" target="_blank">
linux.vnet.ibm.com</a>> wrote:<br>
>><br>
>><br>
>> On 2/19/2014 4:05 PM, Matt Riedemann wrote:<br>
>>><br>
>>> The os-hosts OS API extension [1] showed up before I was working on the<br>
>>> project and I see that only the VMware and XenAPI drivers implement it,<br>
>>> but was wondering why the libvirt driver doesn't - either no one wants<br>
>>> it, or there is some technical reason behind not implementing it for<br>
>>> that driver?<br>
>>><br>
><br>
> If I remember correctly maintenance mode is a special thing in Xen.<br><br><br></div>
Maintenance mode is pretty heavily used with VMware vCenter. When an environment supports "universal" live migration of all VMs, it makes sense to migrate all VMs running on a physical machine off of that machine before bringing it down for maintenance, such
as upgrading the hardware. Provides some classes of end-users with a more 24x7x365 experience.<br><div class="im HOEnZb"><br><br>
>>> [1]<br>
>>><br>
>>> <a href="https://urldefense.proofpoint.com/v1/url?u=http://docs.openstack.org/api/openstack-compute/2/content/PUT_os-hosts-v2_updateHost_v2__tenant_id__os-hosts__host_name__ext-os-hosts.html&k=oIvRg1%2BdGAgOoM1BIlLLqw%3D%3D%0A&r=eH0pxTUZo8NPZyF6hgoMQu%2BfDtysg45MkPhCZFxPEq8%3D%0A&m=qZox2RtL9TtyfQTCmPHLVKpeImL2Fe1NG33oxxlIFTU%3D%0A&s=8120001d41ddc39e4e5edf7721c4f47ea324a388dfb95cad944a140fa8b257de" target="_blank">
http://docs.openstack.org/api/openstack-compute/2/content/PUT_os-hosts-v2_updateHost_v2__tenant_id__os-hosts__host_name__ext-os-hosts.html</a><br>
>>><br>
>>><br>
>><br>
>> By the way, am I missing something when I think that this extension is<br>
>> already covered if you're:<br>
>><br>
>> 1. Looking to get the node out of the scheduling loop, you can just disable<br>
>> it with os-services/disable?<br>
>><br>
>> 2. Looking to evacuate instances off a failed host (or one that's in<br>
>> "maintenance mode"), just use the evacuate server action.<br>
><br>
> I don't think your missing anything.<br>
><br>
>><br>
>><br>
>> --<br>
>><br>
>> Thanks,<br>
>><br>
>> Matt Riedemann<br>
>><br>
>><br><br><br><br></div><span class="HOEnZb"><font color="#888888">-bruce<br></font></span><div class="HOEnZb"><div class="h5"><br><br><br>
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-- <br><div dir="ltr"><div>Thanks,<br><br></div>
Jay<br></div></div></div></div></span></body></html>