Re: [Xen-users] Convert CentOS system to Xen image?

[Igor Chubin <igor@xxxxxxx>]

...
> > > > > For data partitions like /home you can do a dump, sftp, and restore.
> > > >
> > > > Also you can use rsync
> > > > (it should be installed on both hosts).
> > > 
> > > rsync will indiscriminately copy-over files that it shouldn't.
> > 
> > What do you mean?
> 
> Well rsync was really designed to replicate data from
> one system to another, but this isn't technically
> replication here as not all configs will be the same.
> 
> If it's a data volume like /home, then you might get
> by with rsync. I have found though that the time to
> get rsync going efficiently doesn't pay for a one
> time operation. If this is done over a secure
> reliable network and not the Internet, you could do
> a dump | ssh restore type deal, maybe add a gzip
> step in there to compress over the wire and it's
> done.


If I understand you right, 
you say that


hostA# dump / | ssh hostB restore

is more effective than:

hostA# rsync -a / hostB:/

Or you've said 
«
> by with rsync. I have found though that the time to
> get rsync going efficiently doesn't pay for a one
»
about setup time?

rsync installation is very quick.
It's enough to simply install rsync package
and then you can run it (it uses ssh as transport).


> I have been playing around with the idea of using
> something like 'revisor' from Fedora to capture
> the basic system settings and packages into a
> kickstart install iso that you can use to install
> a PV that's identical to the source. Have it do
> an RPM audit of all config files except a few
> key ones like fstab, ifcfg etc and such and tar
> those up and have it extracted in the %post
> section of the kickstart... It's an interesting
> idea... Hmmm



Really interesting idea. Thank you for it.


I'm looking for the way how I can 
automagically (without rsyncing, dumping and another big
data transfers) create clone of a system 
from standard repositories.


Your idea is to package configs delta between
current system (that we want to clone) and fresh system
installed from repo state.


Cloned system configs - fresh system configs => delta.rpm


And after installing delta.rpm into fresh system 
we will have system that will be equal to cloned.

Correct?



> 
> -Ross
> 
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-- 
WBR, i.m.chubin


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