June 2012 - Users - libvirt List Archives

[libvirt-users] The LXC container propagate the ro remount to the host mount point
by Sebastien Douche 01 Jun '12

01 Jun '12

Hi, every so often (cannot determine when it occurs at this time), the VM remount in read only the host partition (/srv here). Is it a bug? A misconfiguration? My config: <filesystem type='mount' accessmode='passthrough'> <source dir='/srv/lxc/lib/vprobe10/rootfs'/> <target dir='/'/> </filesystem> -- Sebastien Douche <sdouche(a)gmail.com> Twitter: @sdouche / G+: +sdouche

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[libvirt-users] Image booted using libvirt with --arch=i686 gives a message: Kernel detected only i486 CPU
by Georgy Sebastian Pullolickal 01 Jun '12

01 Jun '12

I tried booting a gentoo image I had created using the command virt-install --name=test --ram=512 --vcpus=1 --import --os-type=Linux --arch=i686 --disk path=/vms/test.qcow2,format=qcow2 --graphics vnc,port=5910,listen=0.0.0.0,password=test123 --network bridge=virbr0 --noautoconsole --description --autostart However even though the architecture is specified as i686, the image does not boot. It gives a message This kernel requires an i586 CPU, but only detected an i486 CPU. Unable to boot- please use a kernel appropriate for your CPU. The created libvirt profile xml can be found at Pastebin test.xml<http://pastebin.ca/2156937> I am able to boot it directly using qemu --enable-kvm I am at a loss about what could be causing such an issue?? Additionally is there by which I can pass additional parameters to qemu using libvirt? I understand that it is possible to pass the arguments by modifying the domain xml, but is there any way to do the same though command line? For my current work, I need to use a custom version of qemu with custom arguments. -- Regards Georgy

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[libvirt-users] Reg: Info on memory usage from within LXC.
by Alphonse Hansel Anthony 01 Jun '12

01 Jun '12

Hi All, Is it possible to report memory usage of a LXC, from within a LXC? Tools like #top, #free use /proc information and report back the host details. Is /proc namespace aware? Are there any other tools available to report memory usage from cgroups directly, but from within the container? Any info or pointers on this would be useful. Thanks, Alphonse

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[libvirt-users] NPIV setup?
by Jason Price 01 Jun '12

01 Jun '12

I'm missing something. The purpose of NPIV (as I understand it) is to give a guest OS an HBA that it can scan, play with new luns, etc all without making changes to the physical server(s) the guest is living in currently. However, I can't find a way to either have the guest's XML config create the HBA or for the physical server to successfully GIVE the HBA to the guest. I can give disks all day long, but I can't give the HBA to the guest. It seems like libvirt and virsh can only create the vHBA on the physical box, which defeats the purpose of working with NPIV then... I can just present the same luns to the REAL WWPNs of the physical boxes that need access, setup multipathd to give /dev/mapper names in a consistent manner, and give the raw disks to the guests. I really want to get the physical KVM servers out of the 'storage management' game aside from the basic OSes of the guests. How can I do that? (or am I missing something?) --Jason

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