Hi,
i'm cuurently a bit confused if a guest does have a valid snapshot or not.
This is the xml:
...
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
<source
file='/var/lib/libvirt/images/crispor_1604/crispor_1604.sn'/>
<backingStore type='file' index='1'>
<format type='raw'/>
<source
file='/var/lib/libvirt/images/crispor_1604/crispor_1604.img'/>
<backingStore/>
</backingStore>
<target dev='vda' bus='virtio'/>
<alias name='virtio-disk0'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x04' function='0x0'/>
</disk>
...
both files are currently in access by the respective qemu process.
lsof:
qemu-kvm 19533 root 13u REG 253,0 29761732608
12091393 /var/lib/libvirt/images/crispor_1604/crispor_1604.sn
qemu-kvm 19533 root 14r REG 253,0 111561775513
44793857 /var/lib/libvirt/images/crispor_1604/crispor_1604.img
Here are both files:
pc60181:/var/lib/libvirt/images/crispor_1604 # ll
...
-rw------- 1 root root 111561775513 Oct 22 15:23 crispor_1604.img
-rw-r--r-- 1 root root 29761732608 Feb 7 15:13 crispor_1604.sn
crispor_1604.sn has a recent timestamp.
The snapshot is currently in use:
virsh # domblklist crispor_1604
Target Source
------------------------------------------------
vda /var/lib/libvirt/images/crispor_1604/crispor_1604.sn
But virsh does not show any snapshot:
virsh # snapshot-list crispor_1604
Name Creation Time State
------------------------------------------------------------
So i'm a bit confused. Does it have a valid snapshot or not. How can i find
out and how can i get rid of it ?
Thanks.
Bernd
--
Bernd Lentes
Systemadministration
Institute for Metabolism and Cell Death (MCD)
Building 35.34 - Raum 208
HelmholtzZentrum münchen
bernd.lentes@helmholtz-muenchen.de
phone: +49 89 3187 1241
phone: +49 89 3187 3827
fax: +49 89 3187 2294
http://www.helmholtz-muenchen.de/mcd
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Helmholtz Zentrum München
Helmholtz Zentrum Muenchen
Deutsches Forschungszentrum fuer Gesundheit und Umwelt (GmbH)
Ingolstaedter Landstr. 1
85764 Neuherberg
www.helmholtz-muenchen.de
Aufsichtsratsvorsitzende: MinDir.in Prof. Dr. Veronika von Messling
Geschaeftsfuehrung: Prof. Dr. med. Dr. h.c. Matthias Tschoep, Kerstin Guenther
Registergericht: Amtsgericht Muenchen HRB 6466
USt-IdNr: DE 129521671
On Fri, Feb 07, 2020 at 15:25:22 +0100, Lentes, Bernd wrote:> Hi, > > i'm cuurently a bit confused if a guest does have a valid snapshot or not. > This is the xml: > ... > <disk type='file' device='disk'> > <driver name='qemu' type='qcow2'/> > <source file='/var/lib/libvirt/images/crispor_1604/crispor_1604.sn'/> > <backingStore type='file' index='1'> > <format type='raw'/> > <source file='/var/lib/libvirt/images/crispor_1604/crispor_1604.img'/> > <backingStore/> > </backingStore> > <target dev='vda' bus='virtio'/> > <alias name='virtio-disk0'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> > </disk> > ... > > both files are currently in access by the respective qemu process. > lsof: > qemu-kvm 19533 root 13u REG 253,0 29761732608 12091393 /var/lib/libvirt/images/crispor_1604/crispor_1604.sn > qemu-kvm 19533 root 14r REG 253,0 111561775513 44793857 /var/lib/libvirt/images/crispor_1604/crispor_1604.img > > Here are both files: > pc60181:/var/lib/libvirt/images/crispor_1604 # ll > ... > -rw------- 1 root root 111561775513 Oct 22 15:23 crispor_1604.img > -rw-r--r-- 1 root root 29761732608 Feb 7 15:13 crispor_1604.sn > > crispor_1604.sn has a recent timestamp. > > The snapshot is currently in use: > virsh # domblklist crispor_1604 > Target Source > ------------------------------------------------ > vda /var/lib/libvirt/images/crispor_1604/crispor_1604.sn > > > But virsh does not show any snapshot: > > virsh # snapshot-list crispor_1604 > Name Creation Time State > ------------------------------------------------------------ >Libvirt is probably lacking the metadata for the snapshot. That is not a problem though, because since libvirt doesn't support deletion of external snapshots anyways currently you'd need to use the below approach anyways.> So i'm a bit confused. Does it have a valid snapshot or not. How can i find out and how can i get rid of it ?virsh blockcommit crispor_1604 vda --active --pivot in the case above. that merges the file='/var/lib/libvirt/images/crispor_1604/crispor_1604.sn'/ into file='/var/lib/libvirt/images/crispor_1604/crispor_1604.img'/ and finishes the job. If you have more complex backing chain you might want to use the --top and --base arguments to control which portion to merge as the command I've suggested merges everything into the bottom-most image.
----- On Feb 7, 2020, at 3:43 PM, Peter Krempa pkrempa@redhat.com wrote:> On Fri, Feb 07, 2020 at 15:25:22 +0100, Lentes, Bernd wrote:...> > Libvirt is probably lacking the metadata for the snapshot. That is not a > problem though, because since libvirt doesn't support deletion of > external snapshots anyways currently you'd need to use the below > approach anyways. > > virsh blockcommit crispor_1604 vda --active --pivot > > in the case above. that merges the > file='/var/lib/libvirt/images/crispor_1604/crispor_1604.sn'/ > into file='/var/lib/libvirt/images/crispor_1604/crispor_1604.img'/ and > finishes the job. > > If you have more complex backing chain you might want to use the --top > and --base arguments to control which portion to merge as the command > I've suggested merges everything into the bottom-most image.Hi Peter, i'm not lucky: virsh help blockcommit does not know --active or --pivot. virsh # help blockcommit SYNOPSIS blockcommit <domain> <path> [<bandwidth>] [<base>] [--shallow] [<top>] [--delete] [--wait] [--verbose] [--timeout <number>] [--async] OPTIONS [--domain] <string> domain name, id or uuid [--path] <string> fully-qualified path of disk [--bandwidth] <string> bandwidth limit in MiB/s [--base] <string> path of base file to commit into (default bottom of chain) --shallow use backing file of top as base [--top] <string> path of top file to commit from (default top of chain) --delete delete files that were successfully committed --wait wait for job to complete --verbose with --wait, display the progress --timeout <number> with --wait, abort if copy exceeds timeout (in seconds) --async with --wait, don't wait for cancel to finish It does not say anything about the device. I tried: virsh # blockcommit crispor_1604 /var/lib/libvirt/images/crispor_1604.sn vda --wait --verbose error: bandwidth must be a number virsh # blockcommit crispor_1604 /var/lib/libvirt/images/crispor_1604.sn --wait --verbose error: invalid argument: No device found for specified path virsh # blockcommit crispor_1604 crispor_1604.sn --wait --verbose error: invalid argument: No device found for specified path virsh # blockcommit crispor_1604 vda --wait --verbose error: Operation not supported: committing the active layer not supported yet virsh # blockcommit crispor_1604 crispor_1604.sn --wait --verbose error: invalid argument: No device found for specified path virsh # blockcommit crispor_1604 crispor_1604.sn --verbose error: missing --wait option virsh # blockcommit crispor_1604 crispor_1604.sn error: invalid argument: No device found for specified path virsh # blockcommit crispor_1604 crispor_1604.sn vda error: bandwidth must be a number Am i missing something ? Is there an error or is my libvirt version to old ? If yes, would it be successfull to copy the files to a host with more recent libvirt, define it and then blockcommit ? I have libvirt 1.2.5-15.3 (host is SLES 11 SP4). Bernd Helmholtz Zentrum München Helmholtz Zentrum Muenchen Deutsches Forschungszentrum fuer Gesundheit und Umwelt (GmbH) Ingolstaedter Landstr. 1 85764 Neuherberg www.helmholtz-muenchen.de Aufsichtsratsvorsitzende: MinDir.in Prof. Dr. Veronika von Messling Geschaeftsfuehrung: Prof. Dr. med. Dr. h.c. Matthias Tschoep, Kerstin Guenther Registergericht: Amtsgericht Muenchen HRB 6466 USt-IdNr: DE 129521671