[libvirt-users] qemu-img snapshot on running virtual machine
by Gionatan Danti
Hi all,
I have a question about internal qcow2 snapshots of a live/running
virtual machine taken via "qemu-img snapshot command".
My question is: is it safe to execute the command above against a
running machine? Or it will cause corruption? Naively I think it should
*not* be safe, however, I would like a direct confirmation.
Thanks.
--
Danti Gionatan
Supporto Tecnico
Assyoma S.r.l. - www.assyoma.it
email: g.danti(a)assyoma.it - info(a)assyoma.it
GPG public key ID: FF5F32A8
6 years, 8 months
[libvirt-users] Resource control is not supported on this host
by Allence
Libvirt release version V4.1.0
It add a element is cachetune
After we add this, We can use host-cpu-cache
But when i add it, my host get a error message:
"Resource control is not supported on this host"
Why?
Following is my environment:
kernel : 4.1.5,
libvirt : 4.1.0
qemu : 2.9
host : lfs-7.0
my add cachetune in xml:
<cachetune vcpus='0-3'>
<cache id='1' level='3' type='data' size='3' unit='MiB'/>
</cachetune>
6 years, 8 months
[libvirt-users] Xen PVH Support in libvirt
by Tizian Lamatsch
Hello @ all,
i wonder if there is any support for Xen PVH (https://wiki.xen.org/wiki/Xen_Project_Software_Overview) within libvirt.
If i parse a xen native domU config file with 'virsh domxml-from-native' in which i set type='pvh' it changes it in the libvirt xml output to normal pv.
Also the docs of libvirt do not state something like pvh.
I am currently running Xen 4.10.0 with LibVirt 4.0.0.
If it is not possible at the moment, can you please tell if this is a planned feature of libvirt?
Thanks in advance for your help!
Best Regards,
Tizian
6 years, 8 months
[libvirt-users] libvirt connect vmware workstation fail
by 吴金灿
bash: vmwarews+ssh://jc@127.0.0.1/session: No such file or directory
[jc@te ~]$ virsh -c vmwarews+ssh://jc@127.0.0.1/session
错误：连接到管理程序失败
错误：不支持的操作：ssh 连接驱动程序不支持在没有套接字路径的情况下连接到会话实例
[jc@te ~]$ virsh -c vmwarews+ssh://root@127.0.0.1/session
错误：连接到管理程序失败
错误：不支持的操作：ssh 连接驱动程序不支持在没有套接字路径的情况下连接到会话实例
[jc@te ~]$ virsh -c vmwarews:///session
Segmentation fault (核心已转储)
6 years, 8 months
[libvirt-users] KVM or Qemu
by Jamie Fargen
List-
I know this may be slightly off topic and if so tell me to hit up the
emu-discuss mailing list, but does anyone know how to detect the difference
between a guest that is being fully emulates using qemu and a guest that is
running para-virtualized using KVM?
I have and when I inspect the CPUs I see the following....
# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 13
model name : QEMU Virtual CPU version 1.5.3
stepping : 3
microcode : 0x1
cpu MHz : 1995.312
cache size : 4096 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 4
wp : yes
flags : fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pse36
clflush mmx fxsr sse sse2 syscall nx lm rep_good nopl pni cx16 hypervisor
lahf_lm abm
bogomips : 3990.62
clflush size : 64
cache_alignment : 64
address sizes : 46 bits physical, 48 bits virtual
power management:
# dmidecode
# dmidecode 2.12-dmifs
SMBIOS 2.4 present.
10 structures occupying 326 bytes.
Table at 0x000F7190.
Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
Vendor: Seabios
Version: 0.5.1
Release Date: 01/01/2011
Address: 0xE8000
Runtime Size: 96 kB
ROM Size: 64 kB
Characteristics:
BIOS characteristics not supported
Targeted content distribution is supported
BIOS Revision: 1.0
Handle 0x0100, DMI type 1, 27 bytes
System Information
Manufacturer: Red Hat
Product Name: KVM
Version: RHEL 7.0.0 PC (i440FX + PIIX, 1996)
Serial Number: Not Specified
UUID: 1851A1FE-5ABB-42BD-B651-1A5931ADEE40
Wake-up Type: Power Switch
SKU Number: Not Specified
Family: Red Hat Enterprise Linux
Handle 0x0300, DMI type 3, 20 bytes
Chassis Information
Manufacturer: Bochs
Type: Other
Lock: Not Present
Version: Not Specified
Serial Number: Not Specified
Asset Tag: Not Specified
Boot-up State: Safe
Power Supply State: Safe
Thermal State: Safe
Security Status: Unknown
OEM Information: 0x00000000
Height: Unspecified
Number Of Power Cords: Unspecified
Handle 0x0401, DMI type 4, 32 bytes
Processor Information
Socket Designation: CPU 1
Type: Central Processor
Family: Other
Manufacturer: Bochs
ID: D3 06 00 00 FD FB 8B 07
Version: Not Specified
Voltage: Unknown
External Clock: Unknown
Max Speed: 2000 MHz
Current Speed: 2000 MHz
Status: Populated, Enabled
Upgrade: Other
L1 Cache Handle: Not Provided
L2 Cache Handle: Not Provided
L3 Cache Handle: Not Provided
Since it is report a Qemu cpu and Manufacturer Bochs I am suspecting that
it is qemu fully emulated vs KVM para-virtualized.
6 years, 8 months
[libvirt-users] snapshot with libvirt tools or with lvm tools ?
by Lentes, Bernd
Hi,
i asked already a time ago about snapshots. I have some guests, each resides in a raw file, placed on an ext3 fs which is on top of a logical volume, for each guest a dedicated lv.
The raw is not a "must have", if there are obvious reasons i can convert them to a qcow2.
What i want is a consistent backup of each guest taken overnight. If possible i won't have downtime.
I can use the libvirt tools, but the lvm way seems to be more elegant.
Before copying the file the guests resides in i take a snapshot from the respective lv. Then i mount the snapshot and transfer it via rsync on a CIFS share.
Rsync seems to be the appropriate tool because i just transfer the changes in the file compared to the file from a day before. So i don't have to transfer complete and big raw files but just the difference.
The guest still can be running, and after the transfer of the snapshot file i just delete it, and the next night the same procedure.
What do you think ?
Bernd
--
Bernd Lentes
Systemadministration
Institut für Entwicklungsgenetik
Gebäude 35.34 - Raum 208
HelmholtzZentrum münchen
[ mailto:bernd.lentes@helmholtz-muenchen.de | bernd.lentes(a)helmholtz-muenchen.de ]
phone: +49 89 3187 1241
fax: +49 89 3187 2294
[ http://www.helmholtz-muenchen.de/idg | http://www.helmholtz-muenchen.de/idg ]
no backup - no mercy
Helmholtz Zentrum Muenchen
Deutsches Forschungszentrum fuer Gesundheit und Umwelt (GmbH)
Ingolstaedter Landstr. 1
85764 Neuherberg
www.helmholtz-muenchen.de
Aufsichtsratsvorsitzende: MinDir'in Baerbel Brumme-Bothe
Geschaeftsfuehrer: Prof. Dr. Guenther Wess, Heinrich Bassler, Dr. Alfons Enhsen
Registergericht: Amtsgericht Muenchen HRB 6466
USt-IdNr: DE 129521671
6 years, 8 months
[libvirt-users] About .img file while creating vm
by amey pandit
Hi,
I am trying to create vm using virsh create x.xml. But I am confused as
what is the .img file that is required.
Here is the Disk tag from my xml.
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
* <source file='/xxx/xx_vm.img'/> *
<target dev='hda'/>
</disk>
Is it .ova file that is converted to .img ?
If anybody have links or some guide related to the topic that would be
really helpful.
Thank you,
Amey
6 years, 8 months
