[lxc-devel] [PATCH] implement loopback backing store

[Serge Hallyn]

Quoting Tomas Pospisek (tpo2 at sourcepole.ch):
> Am 03.06.2013 23:38, schrieb Serge Hallyn:
> > Create a loopfile backed container by doing:
> > 
> > 	lxc-create -B loop -t template -n name
> > 
> > or
> > 
> > 	lxc-clone -B loop -o dir1 -n loop1
> > 
> > The rootfs in the configuration file will be
> > 
> > 	loop:/var/lib/lxc/loop1/rootdev
> 
> While I applaud usability improvements, I am not sure VMs in a loopback
> device should be promoted.
> 
> It's known that the loopback device can deadlock and loose data
> [1][2][3], which I find highly problematic.

Hm, but all three of those links are specifically about drbd on loopback.
We could add a documentation note (not sure where - lxc-create man
page?) about running drbd nodes on loopback-backed containers...

I suspect the qemu-nbd backing store (which I'll do next, at some point)
will be far more widely used than loopback.

-serge