Re: [Xen-users] How do I share a folder with xen guests on Linux?

[Nico Kadel-Garcia <nkadel@xxxxxxxxx>]

Rudi Ahlers wrote:
> Nico Kadel-Garcia wrote:
> > Tomasz Chmielewski wrote:
> > > Rudi Ahlers schrieb:
> > > > Tomasz Chmielewski wrote:
> > > > > Rudi Ahlers schrieb:
> > > > > > Hi
> > > > > >
> > > > > > How do I share a folder, say /bkp with xen hosts? I'm using 
> > > > > > CentOS 5.1 as host 
> > > > > NFS?
> > > > Sorry, I should have said, I'd like to the folder to be visible to 
> > > > the guests, and not NFS / FTP, as it will interfere with the 
> > > > network statistics on the NIC
> > > I don't think there are any other options to share data between the 
> > > host and guest other than using network.
> > > Certainly, using a serial connection or VNC are not an option.
> > >
> > > Why not create a separate interface just for this kind of traffic?
> > Yes, there is. Once you've booted the Xen domaiin, you can add hte 
> > block device or ISO or other file system image to the list of block 
> > devices of the guest domain with the "xm" command, and then log into 
> > the Xen guest and mount it there. I recommend this only for read-only 
> > block devices, to avoid becoming confused about what is writing to 
> > the partition and how too manage it.
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
> This is what I am looking for, but the purpose of the exercise is to 
> allow the VM's to backup their data to the extra block device. 
> /dev/hdd1 is basically an extra empty HDD that I want to use for 
> backups, so it's imperative for them to write to them. Currently it's 
> mounted on /bck on the dom0, so I think I'll just create a seperate 
> folder for each vm, like /bck/vm01, /bck/vm02, etc
> But, how do I share that block device with the domU's? I'm very new to 
> Xen
Only do it to one guest at a time: allowing multiple guests to mount and 
write at the same time is deadly.
But there are plenty of published walk throughs, look up "block-attach" 
in the manual page for xm, which has a good example.

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