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<div>2 sep 2012 kl. 10.25 skrev Damiano Verzulli:</div>
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Il 02/09/2012 09:14, Itamar Heim ha scritto:<br>
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<blockquote type="cite">[...] I also tried to install a fresh FC17 as host, but I lack
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<blockquote type="cite">detailed instructions to install vdsm on it.<br>
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<blockquote type="cite">Any help? John Xu<br>
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<blockquote type="cite"><a href="http://wiki.ovirt.org/wiki/Troubleshooting_NFS_Storage_Issues">http://wiki.ovirt.org/wiki/Troubleshooting_NFS_Storage_Issues</a>
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<blockquote type="cite">especially this part: NFS Storage Domain Failure on Fedora 17<br>
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I had exactly the very same issue and... spent several days figuring how<br>
to solve it, based also on "Troubleshooting NFS..." above.<br>
<br>
The critical information that page above is lacking, is that kernel 3.4.*<br>
is _not_ available, for FC17, in ready-made RPM. So this command:<br>
<br>
<span class="Apple-tab-span" style="white-space:pre"></span># rpm -qa | grep kernel-3.4<br>
<br>
will _NOT_ produce output, and searching the web for "kernel-3.4" FC17<br>
RPMs will get you to plenty of "rt" kernel that, being real-time<br>
oriented, I wonder if are suitable for our virtualization goals (or not...).<br>
<br>
In the end, I saw that kernel-3.4 is correctly packaged and delivered<br>
with FC16 updates and yesterday I (succesfully) installed:<br>
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<span class="Apple-tab-span" style="white-space:pre"></span><span class="Apple-tab-span" style="white-space:pre"></span>kernel-3.4.9-2.fc16.x86_64.rpm [1]<br>
<br>
Afterwards, the NFS/ISO domain was immediately added, with no problems<br>
(NFS server is a FreeNas box). Some minor issue relates to UID/GID<br>
mapping, but these are easily solvable, thanks to mentioned web-page<br>
(Troubleshooting NFS...)<br>
<br>
I have _NOT_ a clear idea about the impact of such a setup:<br>
- - a (current, updated) FC17 setup;<br>
- - kernel-3.4.9 and related (quite old) kvm kernel module;<br>
- - (very new) virtualization-preview repository enabled [2] (I need<br>
v-motion between VMs), hence:<br>
<span class="Apple-tab-span" style="white-space:pre"></span>- libvirt 0.9.13<br>
<span class="Apple-tab-span" style="white-space:pre"></span>- qemu 1.2<br>
<span class="Apple-tab-span" style="white-space:pre"></span>- qemu-kvm 1.2<br>
<br>
...but I will investigate in the upcoming days (BTW: I'm having very poor<br>
NFS and network performance, but these could be caused by my hardware setup).<br>
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Just chipping in about your NFS performance. Since you said the it´s a FreeNAS box, I´m guessing you´re using ZFS. In that case the best way to speed up NFS is to add a powerful Separate LOG device (ZIL SLOG), or "zfs set sync=disable poolname/fsname" but that
is dangerous and will cause data loss in case of network or power failure. Make sure to properly partition the SLOG aligned to 4k or 1MiB(-b 2048) and use the "gnop"-trick when adding it to the pool so that the SLOG vdev gets ashift set to 12 for optimal performance.
We are using a OCZ Deneva 2 240GB MLC as SLOG in a FreeBSD ZFS pool(FreeNAS is FreeBSD base with a Web GUI on top), seeing the SLOG at 80% busy doing 2Gb/s, and response time is slim to none.</div>
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So, in the end, I can finally correctly power-up my first VM and access<br>
its console via VNC (on my Ubuntu notebook, spice-client is not<br>
available, and I want to spend my efforts in "core" ovirt-issues, insted<br>
of compiling firefox addons). I can see the network-setup of a CentOS<br>
test-vm starting but... nothing else. I'm starting, right now,<br>
investigating those other issues.<br>
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Should you need further info, don't hesitate to ask.<br>
<br>
HTH.<br>
DV<br>
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[1]<br>
<a href="http://fedora.mirror.garr.it/mirrors/fedora/linux/updates/16/x86_64/kernel-3.4.9-2.fc16.x86_64.rpm">http://fedora.mirror.garr.it/mirrors/fedora/linux/updates/16/x86_64/kernel-3.4.9-2.fc16.x86_64.rpm</a><br>
[2] http://fedorapeople.org/groups/virt/virt-preview/fedora-17/x86_64/<br>
<br>
- -- <br>
Damiano Verzulli<br>
e-mail: damiano@verzulli.it<br>
- ---<br>
possible?ok:while(!possible){open_mindedness++}<br>
- ---<br>
"Technical people tend to fall into two categories: Specialists<br>
and Generalists. The Specialist learns more and more about a<br>
narrower and narrower field, until he eventually, in the limit,<br>
knows everything about nothing. The Generalist learns less and<br>
less about a wider and wider field, until eventually he knows<br>
nothing about everything." - William Stucke - AfrISPA<br>
http://elists.isoc.org/mailman/private/pubsoft/2007-December/001935.html<br>
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