- Users - libvirt List Archives

[libvirt-users] VM status when guest poweroff
by Hong-Hua.Yin＠freescale.com 18 Sep '14

18 Sep '14

Hi， I tried QEMU on ARM/PPC platforms. If running poweroff command on guest, it should also shutoff the VM. But it shows the VM status still be 'running' instead of 'shutoff'. I guess it should be qemu issue, is it right? Best Regards, Olivia

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[libvirt-users] qemu:///system and qemu:///session
by navin p 17 Sep '14

17 Sep '14

Hi, I try to connect from virsh -c qemu:///session and it shows the VMs created by by that particular user (testuser). But when i try from root virsh -c qemu:///system i don't see the vms created by testuser. How do i make it appear in the root's virsh ie the vms created by testuser ? I need this because i need information for global VM statistics created by all users. Can someone help me regarding this ? Regards, Navin

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[libvirt-users] virsh's editor configuration
by lejeczek 17 Sep '14

17 Sep '14

hi all where/how to change vim's I presume configuration, one that virsh uses? thanks. P.

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[libvirt-users] grep ip address from KVM DHCP log
by Jianfeng Tang 15 Sep '14

15 Sep '14

> Hi, I plan to use KVM internal network 'default' and grep dhcp log to figure out the IP address that assigned to my VM. I know I can configure static ip but I like to assign ip dynamically to avoid mgmt cost. Does anyone know where the dhcp log is? My KVM host is running Ubuntu Raring (13.04). It does not have file /var/log/daemon.log as some online doc mentioned. Thanks, ~Jianfeng >

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[libvirt-users] Inconsistent behavior between x86_64 and ppc64 when creating guests with NUMA node placement
by Michael Turek 15 Sep '14

15 Sep '14

Hello all, I was recently trying out NUMA placement for my guests on both x86_64 and ppc64 machines. When booting a guest on the x86_64 machine, the following specs were valid (obviously, just notable excepts from the xml): <memory unit='KiB'>8388608</memory> <currentMemory unit='KiB'>8388608</currentMemory> <vcpu placement='static'>4</vcpu> ... <cpu> <topology sockets='4' cores='1' threads='1'/> <numa> <cell cpus='0-2' memory='6144'/> <cell cpus='3' memory='2048'/> </numa> </cpu> However, on ppc64 this causes the following error: error: Failed to create domain from sample_guest.xml error: internal error: early end of file from monitor: possible problem: 2014-09-11T18:44:25.502140Z qemu-system-ppc64: total memory for NUMA nodes (8388608) should equal RAM size (200000000) The 200000000 is actually 8192 MB in bytes and hexidecimal. This is apparently just an issue with the error message. The following specs work on ppc64: <cpu> <topology sockets='4' cores='1' threads='1'/> <numa> <cell cpus='0-2' memory='6291456'/> <cell cpus='3' memory='2097152'/> </numa> </cpu> Note that the memory for each cell is 6144*1024 and 2048*1024 respectively. The issue is that the memory size for each NUMA cell should be specified in KiB, not MB (http://libvirt.org/formatdomain.html#resPartition "|memory| specifies the node memory in kibibyte"). In short, it seems that specifying NUMA cell memory in MB works on x86_64 but not on ppc64. Does anyone have any insight to what's causing this, or if I'm misunderstanding something? Any help is appreciated, thank you! Regards, Michael Turek

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[libvirt-users] ntpd in VM
by Adam King 12 Sep '14

12 Sep '14

----- Original Message ----- From: "Adam King" <kinga(a)sghs.org.uk> To: "Gary Hook" <garyrhook(a)gmail.com> Sent: Friday, September 12, 2014 1:39:38 PM Subject: Re: [libvirt-users] ntpd in VM ----- Original Message ----- From: "Gary Hook" <garyrhook(a)gmail.com> To: libvirt-users(a)redhat.com Sent: Friday, September 12, 2014 1:25:47 PM Subject: Re: [libvirt-users] ntpd in VM While I agree that running a time server in a VM is, at best, problematic, most of those nay-sayers have experience with VMware, xen and the like. Those aren't the only hypervisors out there, and the decision process should depend upon the hypervisor (to a significant degree), not just the idea of "can I do this in a VM?" Not all hypervisors are created equally. On Fri, Sep 12, 2014 at 7:14 AM, Pierre Schweitzer < pierre(a)reactos.org > wrote: Hi, It is still a bad idea. I invite you to read here for the reasons why: http://serverfault.com/a/106509/150152 Cheers, On 09/12/2014 12:51 PM, Mauricio Tavares wrote: > I was taught in kitty school that running a ntp server in a vm > was a bad idea. Is that still the case? > My experience is somewhat different. VMWare has always been problematic with this, especially Linux guests. I've run KVM based NTP servers inside vm's (2 as active:standby) and dozens of ntp clients inside vm's for over a year now and seen no adverse results. Admittedly I've not been checking the drift but I can vouch for the results. Regards Adam King <blockquote> </blockquote>

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[libvirt-users] ntpd in VM
by Mauricio Tavares 12 Sep '14

12 Sep '14

I was taught in kitty school that running a ntp server in a vm was a bad idea. Is that still the case?

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[libvirt-users] trying but failing - pass-through scsi/sata
by lejeczek 12 Sep '14

12 Sep '14

hi everybody I'd imagine this topic must have been covered, yet I've failed to find any really helpful and a solid howto/examples of how to pass-through a sata disks. currently I'm having this in my xml: <hostdev mode='subsystem' type='scsi' managed='no'> <source> <adapter name='scsi_host4'/> <address bus='0' target='0' unit='0'/> </source> <address type='drive' controller='4' bus='0' target='0' unit='0'/> </hostdev> I took it from http://libvirt.org/formatdomain.html#elementsHostDevSubsys yet a Linux guest (SL7) fails to find/detect any disks, if I dumpxml I get this: <device> <name>block_sdb_OCZ_VERTEX4_OCZ_352C77TZVQF1Y3SX</name> <path>/sys/devices/pci0000:00/0000:00:1f.2/ata5/host4/target4:0:0/4:0:0:0/block/sdb</path> <parent>scsi_4_0_0_0</parent> <capability type='storage'> <block>/dev/sdb</block> <bus>ata</bus> <drive_type>disk</drive_type> <model>OCZ-VERTEX4</model> <vendor>ATA</vendor> <serial>OCZ-VERTEX4_OCZ-352C77TZVQF1Y3SX</serial> <size>128035676160</size> <logical_block_size>512</logical_block_size> <num_blocks>250069680</num_blocks> </capability> </device> how do I pass-through sata drives? any help much appreciated, thanks!

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[libvirt-users] QEMU disk migration not using entire connection throughput
by Joaquim Barrera 09 Sep '14

09 Sep '14

Hello everybody, I've been observing that, during the disk migration usign --copy-storage-inc, the data transfer hardly ever uses the entire available connection bandwidth (in my case 1 Gb/s), and the migration is at a non-constant speed. On the other hand, at the memory migration step, everything goes perfect. I am almost sure that this is not a nard disk throughput limitation, because a 'scp' command between the two same machines performs perfectly right. Is libvirt (or maybe QEMU?) doing some extra work that may cause slowlyness? Thanks!

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[libvirt-users] USB redirection
by Fl＠sh 05 Sep '14

05 Sep '14

What is the difference between 'USB Host device assignment' from 'USB Redirected devices'? -- Fl@sh

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