On Mon, Mar 04, 2019 at 09:38:45PM +0300, Andrey Repin wrote:
Hi,
> > I'd like to have separate zfs datasets for /var, /tmp and some other
> > mountpoints inside my guests.
>
> > What's a good way of achieving this?
>
> > As far as I could determine from looking at the source, the zfs storage
> > backend doesn't support anything like it, and lxc-create doesn't run any
> > hooks.
>
> > Should I instead write a wrapper around lxc-create that creates and mounts
> > my zfs datasets just so, and calls lxc-create with the 'dir' storage
> > backend?
>
> > Or is there a better way?
>
> If I may hazard a guess, there's two ways to achieve this:
>
> 1. Rebind the directories individually.
> Use lxc.mount.* commands in the config or specify lxc.mount.fstab file with
> your bindings.
Yes, that works once the container exists. During the lxc-create phase, however,
/var would be populated as a subdirectory of the monolithic rootfs; I'd then
need to rename that var/ directory, create my new fs in its place, then move
stuff from oldvar/ to var/. Rinse and repeat for all/any other filesystems
I'd like to split out.
I'm looking for a way to have lxc-create create the filesystems and mount
them; ideally, there'd be an lxc.hook.create that I could use (from the
default config), but there isn't, so it looks like I can either
* do the rename; create fs; move files dance each time OR
* write a wrapper around lxc-create.
(Or improve the zfs storage backend, but I can't invest that much time.)
Am I missing anything?
András
--
The bride got a new name and a dress.
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