Hi,
While there are a few howtos floating around, what is the standard way to snapshot guests?
I went through and converted from raw to pre allocated meta data qcow2 images for this purpose.
Some howtos suggest to do an xml snapshot file as so;
<domainsnapshot> <name>UbuntuServer_10.10-16032011</name> <description>Snapshot of OS install and updates</description> </domainsnapshot>
And then to run as so;
virsh snapshot-create UbuntuServer_10.10 UbuntuServer_10.10-ss.xml
Seems a bit over kill.
I was thinking more along the lines of this;
qemu-img snapshot -c $date $filename
qemu-img convert -f qcow2 -O qcow2 -s $date $filename $filename-$date
Or something like this.Anyways, hoping to see how you all are doing this for best practice sort of thing.
- aurf
On 26.04.2012 18:23, aurfalien wrote:
Hi,
While there are a few howtos floating around, what is the standard way to snapshot guests?
I went through and converted from raw to pre allocated meta data qcow2 images for this purpose.
Some howtos suggest to do an xml snapshot file as so;
<domainsnapshot> <name>UbuntuServer_10.10-16032011</name> <description>Snapshot of OS install and updates</description> </domainsnapshot>
And then to run as so;
virsh snapshot-create UbuntuServer_10.10 UbuntuServer_10.10-ss.xml
Seems a bit over kill.
I was thinking more along the lines of this;
qemu-img snapshot -c $date $filename
qemu-img convert -f qcow2 -O qcow2 -s $date $filename $filename-$date
Or something like this.Anyways, hoping to see how you all are doing this for best practice sort of thing.
Hi,
I just use LVM snapshots; it's the fastest, most reliable way I could come with.
On Apr 26, 2012, at 1:54 PM, Nux! wrote:
On 26.04.2012 18:23, aurfalien wrote:
Hi,
While there are a few howtos floating around, what is the standard way to snapshot guests?
I went through and converted from raw to pre allocated meta data qcow2 images for this purpose.
Some howtos suggest to do an xml snapshot file as so;
<domainsnapshot> <name>UbuntuServer_10.10-16032011</name> <description>Snapshot of OS install and updates</description> </domainsnapshot>
And then to run as so;
virsh snapshot-create UbuntuServer_10.10 UbuntuServer_10.10-ss.xml
Seems a bit over kill.
I was thinking more along the lines of this;
qemu-img snapshot -c $date $filename
qemu-img convert -f qcow2 -O qcow2 -s $date $filename $filename-$date
Or something like this.Anyways, hoping to see how you all are doing this for best practice sort of thing.
Hi,
I just use LVM snapshots; it's the fastest, most reliable way I could come with.
Hi,
I don't have LVMs.
But if I did, would it be possible to only snapshot a directory or will it snapshot the entire file system?
- aurf
On 26.04.2012 19:12, aurfalien wrote:
On Apr 26, 2012, at 1:54 PM, Nux! wrote:
On 26.04.2012 18:23, aurfalien wrote:
Hi,
While there are a few howtos floating around, what is the standard way to snapshot guests?
I went through and converted from raw to pre allocated meta data qcow2 images for this purpose.
Some howtos suggest to do an xml snapshot file as so;
<domainsnapshot> <name>UbuntuServer_10.10-16032011</name> <description>Snapshot of OS install and updates</description> </domainsnapshot>
And then to run as so;
virsh snapshot-create UbuntuServer_10.10 UbuntuServer_10.10-ss.xml
Seems a bit over kill.
I was thinking more along the lines of this;
qemu-img snapshot -c $date $filename
qemu-img convert -f qcow2 -O qcow2 -s $date $filename $filename-$date
Or something like this.Anyways, hoping to see how you all are doing this for best practice sort of thing.
Hi,
I just use LVM snapshots; it's the fastest, most reliable way I could come with.
Hi,
I don't have LVMs.
But if I did, would it be possible to only snapshot a directory or will it snapshot the entire file system?
Assuming you use LVM on the host to provide the virtual machine with a (virtual) HDD, then snapshotting that will obviously be (virtual) disk-wise.
On Apr 26, 2012, at 2:15 PM, Nux! wrote:
On 26.04.2012 19:12, aurfalien wrote:
On Apr 26, 2012, at 1:54 PM, Nux! wrote:
On 26.04.2012 18:23, aurfalien wrote:
Hi,
While there are a few howtos floating around, what is the standard way to snapshot guests?
I went through and converted from raw to pre allocated meta data qcow2 images for this purpose.
Some howtos suggest to do an xml snapshot file as so;
<domainsnapshot> <name>UbuntuServer_10.10-16032011</name> <description>Snapshot of OS install and updates</description> </domainsnapshot>
And then to run as so;
virsh snapshot-create UbuntuServer_10.10 UbuntuServer_10.10-ss.xml
Seems a bit over kill.
I was thinking more along the lines of this;
qemu-img snapshot -c $date $filename
qemu-img convert -f qcow2 -O qcow2 -s $date $filename $filename-$date
Or something like this.Anyways, hoping to see how you all are doing this for best practice sort of thing.
Hi,
I just use LVM snapshots; it's the fastest, most reliable way I could come with.
Hi,
I don't have LVMs.
But if I did, would it be possible to only snapshot a directory or will it snapshot the entire file system?
Assuming you use LVM on the host to provide the virtual machine with a (virtual) HDD, then snapshotting that will obviously be (virtual) disk-wise.
I used a simple non LVM partitioning scheme.
Can I do directory based snapshots in LVM or is it the entire FS?
I can re implement or redo my host to use LVM.
- aurf
On 26.04.2012 19:21, aurfalien wrote:
On Apr 26, 2012, at 2:15 PM, Nux! wrote:
On 26.04.2012 19:12, aurfalien wrote:
On Apr 26, 2012, at 1:54 PM, Nux! wrote:
On 26.04.2012 18:23, aurfalien wrote:
Hi,
While there are a few howtos floating around, what is the standard way to snapshot guests?
I went through and converted from raw to pre allocated meta data qcow2 images for this purpose.
Some howtos suggest to do an xml snapshot file as so;
<domainsnapshot> <name>UbuntuServer_10.10-16032011</name> <description>Snapshot of OS install and updates</description> </domainsnapshot>
And then to run as so;
virsh snapshot-create UbuntuServer_10.10 UbuntuServer_10.10-ss.xml
Seems a bit over kill.
I was thinking more along the lines of this;
qemu-img snapshot -c $date $filename
qemu-img convert -f qcow2 -O qcow2 -s $date $filename $filename-$date
Or something like this.Anyways, hoping to see how you all are doing this for best practice sort of thing.
Hi,
I just use LVM snapshots; it's the fastest, most reliable way I could come with.
Hi,
I don't have LVMs.
But if I did, would it be possible to only snapshot a directory or will it snapshot the entire file system?
Assuming you use LVM on the host to provide the virtual machine with a (virtual) HDD, then snapshotting that will obviously be (virtual) disk-wise.
I used a simple non LVM partitioning scheme.
Can I do directory based snapshots in LVM or is it the entire FS?
I can re implement or redo my host to use LVM.
- aurf
CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Aurf,
LVM is filesystem level, not directory level. What I'd recommend is to reinstall and use LVM, make a couple of volumes for / and swap and leave the rest for virtual machines.
On Apr 26, 2012, at 2:24 PM, Nux! wrote:
On 26.04.2012 19:21, aurfalien wrote:
On Apr 26, 2012, at 2:15 PM, Nux! wrote:
On 26.04.2012 19:12, aurfalien wrote:
On Apr 26, 2012, at 1:54 PM, Nux! wrote:
On 26.04.2012 18:23, aurfalien wrote:
Hi,
While there are a few howtos floating around, what is the standard way to snapshot guests?
I went through and converted from raw to pre allocated meta data qcow2 images for this purpose.
Some howtos suggest to do an xml snapshot file as so;
<domainsnapshot> <name>UbuntuServer_10.10-16032011</name> <description>Snapshot of OS install and updates</description> </domainsnapshot>
And then to run as so;
virsh snapshot-create UbuntuServer_10.10 UbuntuServer_10.10-ss.xml
Seems a bit over kill.
I was thinking more along the lines of this;
qemu-img snapshot -c $date $filename
qemu-img convert -f qcow2 -O qcow2 -s $date $filename $filename-$date
Or something like this.Anyways, hoping to see how you all are doing this for best practice sort of thing.
Hi,
I just use LVM snapshots; it's the fastest, most reliable way I could come with.
Hi,
I don't have LVMs.
But if I did, would it be possible to only snapshot a directory or will it snapshot the entire file system?
Assuming you use LVM on the host to provide the virtual machine with a (virtual) HDD, then snapshotting that will obviously be (virtual) disk-wise.
I used a simple non LVM partitioning scheme.
Can I do directory based snapshots in LVM or is it the entire FS?
I can re implement or redo my host to use LVM.
- aurf
CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Aurf,
LVM is filesystem level, not directory level. What I'd recommend is to reinstall and use LVM, make a couple of volumes for / and swap and leave the rest for virtual machines.
The real problem with this is that snapshots are still on the local box and I don't have a SAN.
With KVM based qcow snaps, I can do snaps over NFS.
- aurf
Hi,
On Fri, Apr 27, 2012 at 12:48 AM, aurfalien aurfalien@gmail.com wrote:
On Apr 26, 2012, at 2:24 PM, Nux! wrote:
On 26.04.2012 19:21, aurfalien wrote:
On Apr 26, 2012, at 2:15 PM, Nux! wrote:
On 26.04.2012 19:12, aurfalien wrote:
On Apr 26, 2012, at 1:54 PM, Nux! wrote:
On 26.04.2012 18:23, aurfalien wrote: > Hi, > > While there are a few howtos floating around, what is the > standard > way to snapshot guests? > > I went through and converted from raw to pre allocated meta data > qcow2 images for this purpose. > > Some howtos suggest to do an xml snapshot file as so; > > <domainsnapshot> > <name>UbuntuServer_10.10-16032011</name> > <description>Snapshot of OS install and updates</description> > </domainsnapshot> > > And then to run as so; > > virsh snapshot-create UbuntuServer_10.10 > UbuntuServer_10.10-ss.xml > > Seems a bit over kill. > > I was thinking more along the lines of this; > > qemu-img snapshot -c $date $filename > > qemu-img convert -f qcow2 -O qcow2 -s $date $filename > $filename-$date > > Or something like this.Anyways, hoping to see how you all are > doing > this for best practice sort of thing.
Hi,
I just use LVM snapshots; it's the fastest, most reliable way I could come with.
Hi,
I don't have LVMs.
But if I did, would it be possible to only snapshot a directory or will it snapshot the entire file system?
Assuming you use LVM on the host to provide the virtual machine with a (virtual) HDD, then snapshotting that will obviously be (virtual) disk-wise.
I used a simple non LVM partitioning scheme.
Can I do directory based snapshots in LVM or is it the entire FS?
I can re implement or redo my host to use LVM.
- aurf
CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Aurf,
LVM is filesystem level, not directory level. What I'd recommend is to reinstall and use LVM, make a couple of volumes for / and swap and leave the rest for virtual machines.
The real problem with this is that snapshots are still on the local box and I don't have a SAN.
With KVM based qcow snaps, I can do snaps over NFS.
You can copy LVM snapshots easily to some other location with dd (= create image file of the snapshot LVM volume) that you can restore where ever you like using dd again.
Regards, Peter
Hi, On Apr 27, 2012, at 4:23 AM, Peter Peltonen wrote:
Hi,
On Fri, Apr 27, 2012 at 12:48 AM, aurfalien aurfalien@gmail.com wrote:
On Apr 26, 2012, at 2:24 PM, Nux! wrote:
On 26.04.2012 19:21, aurfalien wrote:
On Apr 26, 2012, at 2:15 PM, Nux! wrote:
On 26.04.2012 19:12, aurfalien wrote:
On Apr 26, 2012, at 1:54 PM, Nux! wrote:
> On 26.04.2012 18:23, aurfalien wrote: >> Hi, >> >> While there are a few howtos floating around, what is the >> standard >> way to snapshot guests? >> >> I went through and converted from raw to pre allocated meta data >> qcow2 images for this purpose. >> >> Some howtos suggest to do an xml snapshot file as so; >> >> <domainsnapshot> >> <name>UbuntuServer_10.10-16032011</name> >> <description>Snapshot of OS install and updates</description> >> </domainsnapshot> >> >> And then to run as so; >> >> virsh snapshot-create UbuntuServer_10.10 >> UbuntuServer_10.10-ss.xml >> >> Seems a bit over kill. >> >> I was thinking more along the lines of this; >> >> qemu-img snapshot -c $date $filename >> >> qemu-img convert -f qcow2 -O qcow2 -s $date $filename >> $filename-$date >> >> Or something like this.Anyways, hoping to see how you all are >> doing >> this for best practice sort of thing. > > Hi, > > I just use LVM snapshots; it's the fastest, most reliable way I > could > come with.
Hi,
I don't have LVMs.
But if I did, would it be possible to only snapshot a directory or will it snapshot the entire file system?
Assuming you use LVM on the host to provide the virtual machine with a (virtual) HDD, then snapshotting that will obviously be (virtual) disk-wise.
I used a simple non LVM partitioning scheme.
Can I do directory based snapshots in LVM or is it the entire FS?
I can re implement or redo my host to use LVM.
- aurf
CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Aurf,
LVM is filesystem level, not directory level. What I'd recommend is to reinstall and use LVM, make a couple of volumes for / and swap and leave the rest for virtual machines.
The real problem with this is that snapshots are still on the local box and I don't have a SAN.
With KVM based qcow snaps, I can do snaps over NFS.
You can copy LVM snapshots easily to some other location with dd (= create image file of the snapshot LVM volume) that you can restore where ever you like using dd again.
After some experiment with qcow vs raw, I think raw is more stable and a tad fatser even if you pre allocate the metadata for your qcow images.
So, I will opt for LVMs.
Do you have a best practice in terms of ratio of snapshot to live FS?
In other words, should my LVM snapshot partition be 1:1 with my live FS size or 2/3 the size of bigger?
This will be based off a Raid 1 system.
- aurf
-
aurfalien -
Nux! -
Peter Peltonen