Date: Fri, 27 Apr 2012 17:19:14 -0400 From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> To: Frank Staals <frank@fstaals.net> Cc: FreeBSD-Questions <freebsd-questions@freebsd.org> Subject: Re: Synchronising jails Message-ID: <44ipgkg9f1.fsf@lowell-desk.lan> In-Reply-To: <m2ehr9tf8h.fsf@fstaals.net> (Frank Staals's message of "Fri, 27 Apr 2012 16:35:10 %2B0200") References: <m2ehr9tf8h.fsf@fstaals.net>
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Frank Staals <frank@fstaals.net> writes: > Hey Everyone, > > I'm looking for a way to synchronise two jails. More specifically, I > would like to keep/maintain an exact copy of a given jail. As an > example: Suppose I build a jail A on some system (in my particular case > build with ezjail) , and I copy the jail > into jail B on some other system (using tar, as is mentioned > here: http://forums.freebsd.org/showthread.php?t=17813). Now stuff > happens in Jail A, e.g. files change, new stuff is installed etc. I > would like to propagate these changes to jail B, but since the transfer > is over WAN I would like not to have to copy the entire jail again, just > the stuff that has changed since the last backup. It is safe to assume > nothing in Jail B changes: I basically want to maintain the exact copy > so if something would happen to the system running Jail A I can > immediately switch to jail B without much hassle. > > Normally I would say this a perfect use case for rsync. But as the > aforementioned thread mentions ``scp or similar wont work to copy a > jail'', and I consider rsync similar to scp, I am under the impression > that rsync would not be usable in this situation. Can anyone shed some > light on this, or suggest an alternative to synchronise the jails? I didn't don't know of any problem with using rsync (over ssh) for this, and after reading the thread to which you refer, I still don't. Set up a testbed using rsync and see if it works for you. If it doesn't, *then* you'll have something we can try to solve.
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