On Tue, Feb 01, 2011 at 02:25:12PM +0300, Vasiliy G Tolstov wrote: > On Tue, 2011-02-01 at 11:58 +0100, jes.soren...@redhat.com wrote: > > From: Jes Sorensen <jes.soren...@redhat.com> > > > > Hi > > > > This is a first attempt to add fsfreeze support to virtagent. The idea > > is for the guest agent to walk the list of locally mounted file > > systems in the guest, and issuing an ioctl to freeze them. The host > > can then do a live snapshot of the guest, obtaining stable file > > systems. After the snapshot, the host then calls the thaw function in > > virtagent, which goes through the list of previously frozen file > > systems and unfreezes them. > > > > The list walking ignores remote file systems such as NFS and CIFS as > > well as all pseudo file systems. > > > > The guest agent code is in the first patch, and host agent code is in > > the second patch. For now there is only human monitor support, but it > > should be pretty straight forward to add QMP support as well. > > > > Patches are against the virtagent-dev git tree. > > > > Comments and suggestions welcome! > > > > Cheers, > > Jes > > Hello. Very nice feature. Sorry for offropic, but can this feature can > be used to modify partiotion table on already mounted device (for > example root on ext3? )
There are some experimental patches to libguestfs to do live filesystem and partition manipulations now: https://www.redhat.com/archives/libguestfs/2011-January/msg00096.html Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://libguestfs.org
