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<div class="moz-cite-prefix">On 10/27/2015 04:20 PM, Aline Manera
wrote:<br>
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<div class="moz-cite-prefix">On 27/10/2015 15:50, Daniel Henrique
Barboza wrote:<br>
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<div class="moz-cite-prefix">On 10/27/2015 03:27 PM, Frank Novak
wrote:<br>
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<blockquote
cite="mid:201510271727.t9RHRQJs013680@d01av04.pok.ibm.com"
type="cite">
<p><br>
<br>
<br>
<tt><a moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:kimchi-devel-bounces@ovirt.org">kimchi-devel-bounces@ovirt.org</a>
wrote on 10/27/2015 12:00:03 PM:<br>
<br>
> On 10/27/2015 11:13 AM, Frank Novak wrote:<br>
> ><br>
> ><br>
> ><br>
> ><br>
> > <a moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:kimchi-devel-bounces@ovirt.org">kimchi-devel-bounces@ovirt.org</a>
wrote on 10/27/2015 08:31:49 AM:<br>
> ><br>
> > > Date: Mon, 26 Oct 2015 16:08:11 -0200<br>
> > > From: <a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="mailto:dhbarboza82@gmail.com"><dhbarboza82@gmail.com></a><br>
> > > To: Kimchi Devel <a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="mailto:kimchi-devel@ovirt.org"><kimchi-devel@ovirt.org></a><br>
> > > Subject: [Kimchi-devel] [PATCH 0/3] Live
migration backend<br>
> > > Message-ID: <a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="mailto:1445882894-10208-1-git-send-email-dhbarboza82@gmail.com"><1445882894-10208-1-git-send-email-dhbarboza82@gmail.com></a><br>
> > ><br>
> > > From: Daniel Henrique Barboza <a
moz-do-not-send="true" class="moz-txt-link-rfc2396E"
href="mailto:dhbarboza82@gmail.com"><dhbarboza82@gmail.com></a><br>
> > ><br>
> > > This patch series implements the first
release of the Live (and cold!)<br>
> > > migration in Kimchi.<br>
> > ><br>
> > > *** Requirements for a VM migration ***<br>
> > ><br>
> > > - shared storage. The disk/storage path
must be the same at the origin<br>
> > > and destination.<br>
> > Is this a temporary restriction in kimchi?<br>
> > We otherwise do support live migration w/
storage...<br>
> ><br>
> <br>
> I guess I've expressed myself poorly there. What I
meant was that the VM <br>
> must be in the same<br>
> storage pool at both hosts (shared storage). For
example, a NFS/iSCSI <br>
> storage pool that contains<br>
> both the source and destination. The idea is that the
migration process <br>
> will only copy the VM<br>
> RAM - the disks would be accessible by the VM at the
destination from <br>
> the same path.<br>
> <br>
> I am aware that there is an option to copy the
storage (non-shared <br>
> storage migration) but I've found<br>
> out that it isn't that supported by Red Hat for
example:<br>
> <br>
> <a moz-do-not-send="true"
href="https://access.redhat.com/solutions/60034">https://access.redhat.com/solutions/60034</a><br>
> <br>
> "Live migration with non-shared storage in
RHEL6/RHEV3.* is a deprecated <br>
> functionality, but under certain circunstances and
with some <br>
> limitations, it works fine. In RHEL7, this feature
has been disabled."<br>
> <br>
> <br>
> However, if some distro that Kimchi supports still
have support for non <br>
> shared migration, we can<br>
> add this option as well.<br>
> </tt><br>
<tt>well, PowerKVM at least does.. </tt><br>
<tt>I haven't checked whether Ubuntu or SLES KVM do..</tt><br>
</p>
</blockquote>
Fair enough. I'll add this support in the next version of this
backend<br>
<br>
</blockquote>
<br>
Daniel, we can follow the same logic we did for ISO streaming
which does not have support on RHEL7 and disable the feature only
when the distro does not have support for it.<br>
About the code, you can add a feature test to cover it.<br>
</blockquote>
<br>
Noted. Will definitely look into that for a second version of the
backend<br>
<br>
<blockquote cite="mid:562FC054.1070908@linux.vnet.ibm.com"
type="cite"> <br>
<blockquote cite="mid:562FB948.7090007@gmail.com" type="cite">
<blockquote
cite="mid:201510271727.t9RHRQJs013680@d01av04.pok.ibm.com"
type="cite">
<p><tt><br>
> > ><br>
> > > - password-less login<br>
> > ><br>
> > > - enough resorces in the destination host
to allocate the VM<br>
> > ><br>
> > ><br>
> > > Limitations of this first version and
possible candidates for future <br>
> > work:<br>
> > ><br>
> > > - do not automate the process of
password-less login (but it is able to<br>
> > > verify this condition)<br>
> > ><br>
> > > - due to the above limitation, the 'user'
parameter value is only 'root'<br>
> > > at this moment<br>
> > ><br>
> > > - do not verify the 'shared storage'
condition<br>
> > ><br>
> > > - do not verify same hypervisor/arch
conditions<br>
> > ><br>
> > > - the origin VM will shutdown after
migration (not sure if can be <br>
> > helped)<br>
> > ><br>
> > Ahh, shutdown where, if it was running on
source, it should be running <br>
> > on destination..<br>
> > clearly it will not be on source anymore..<br>
> ><br>
> Yeah, that was my reasoning when seeing the VM
shutting down <br>
> automatically in the<br>
> source after the migration was successful.<br>
> <br>
> <br>
> <br>
> <br>
> Daniel<br>
> <br>
> <br>
</tt><br>
<br>
Cheers,<br>
Frank <br>
<br>
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