Re: [Xen-users] Xen Backup Method

[Brian Krusic <brian@xxxxxxxxxx>]

Hi Thomas,

I call a script from cron, that has the lines;

xm pause domUa
xm pause domUb
xm pause domUc
.....
.....
.....
xm unpause domUa
xm unpause domUb
xm unpause domUc

Nothing fancy as I'm not artistic.

xm pause takes 1 arg so I suppose one could create a var that reads  
all the files in /var/lib/images, strips out the .img and assumes the  
domUs are named consistently with there corresponding  img files and  
rums the pause command for every instance of a file name w/o needing  
to name them individually in a script.  This would automate things to  
the next level and be very cool in large envs.
My client is fine with what I set up (for now).

- Brian




On Apr 7, 2009, at 2:25 PM, Thomas Jensen wrote:

> I have a similar script but it does not perform the first step  
> (pausing DomU) before running.  Do you care to share the syntax of  
> that step in your script?
> Tom Jensen | President
> Digital Toolbox
>
> Quoting Brian Krusic <brian@xxxxxxxxxx>:
>
> > Hi Umut,
> >
> > I cron a script running once every early morning that does;
> >
> > 1 - pause the domUs * optional, but state will be accurate if paused.
> > 2 - create/recreate a snapshot of the volume where my dom0/domUs  
> > live.
> > 3 - mount a separate drive and dump/restore the snapshot onto a   
> > separate drive.
> > 4 - unmount the drive.
> > 5 - send mail when all is done.
> >
> > - Brian
> >
> >
> >
> >
> > On Apr 7, 2009, at 2:01 PM, Umut Arus wrote:
> >
> > > Hello,
> > >
> > > I want to properly backup on virtual servers. Has anyone tried   
> > > lvm   backup with scripts or scheduled commands everyday? Could  
> > > you shared  with me? And should be guests and Dom0 shutoff state  
> > > before snapshot?
> > > Another one, which directories should backup other than /var/lib/ 
> > > xen/ images?
> > > thanks,
> > >
> > > Javier Guerra wrote:
> > > > On Tue, Apr 7, 2009 at 1:46 PM, Kevin Fox <Kevin.Fox@xxxxxxx>  
> > > > wrote:
> > > > > Has anyone tried using 2.6.29 file system freezing with lvm   
> > > > > snapshotting
> > > > > yet? That should solve the possible corrupt filesystem problem.
> > > > sounds promising.  but:
> > > >
> > > > 1: its done from 'inside' the VM, so it might allow better network
> > > > backup systems but not replace them.
> > > >
> > > > 2: it does nothing about complex applications with their own caches
> > > > and file structures: IOW, databases.  if you get an 'in VM'  
> > > > snapshot
> > > > capability, you still have to flush caches and suspend operations  
> > > > for
> > > > the snapshot.
> > > _______________________________________________
> > > Xen-users mailing list
> > > Xen-users@xxxxxxxxxxxxxxxxxxx
> > > http://lists.xensource.com/xen-users
>
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