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From: Stefan Monnier <monnier@iro.umontreal.ca>
Newsgroups: comp.os.linux.networking
Subject: Re: Lightweight nodes for learning hands-on TCP/IP networking and administration
Date: Fri, 13 May 2016 08:06:16 -0400
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> 2. This creates u2 as a lightweight snapshot of u1. Hoever, subsequent
> changes made to u1's filesystem get reflected in u2's as well - which is not
> what I want. Apparently, snapshotting has the semantics of 'marking' to
> which you could revert later.
>
> Not what I wanted; I wanted both u1 and u2 to be independent.
>  
>   $ lxc-copy -n u1 -N u2 -B overlayfs -s

If you want 2 independent ones, then you do:

   $ lxc-copy -n u1 -N u2 -B overlayfs -s
   $ lxc-copy -n u1 -N u3 -B overlayfs -s

and then u2 and u3 are independent.  Better not touch u1 after that.


        Stefan