[DRBD-user] DRBD in LXC

Lars Ellenberg lars.ellenberg at linbit.com
Tue Jun 3 01:11:41 CEST 2014

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On Tue, Jun 03, 2014 at 08:38:53AM +1000, Igor Cicimov wrote:
> > Each VM has its own "kernel", its own "drbd" module.
> > => works.
> > But even there, usually you put the VM image on top of DRBD,
> > not some DRBD inside the VM (even though that is possible).
> >
> > Container: does not work.
> > Possibly could be made to work.
> > Probably would not only require changes in DRBD module code,
> > but in generic kernel as well. I don't know.
> > I do not see that happening anytime soon.
> >
> > Maybe find someone who knows,
> > and get them to explain to me
> > what would be necessary to do in DRBD
> > to make it play nice from within containers...
> >
> > But I really don't see why.
> >
> > If you create a container,
> > you tell it what "storage" to use.
> > Put that on top of DRBD.
> > Done.

> Thanks Lars, sounds like a lots of work. The only difference is that the
> control over drbd is outside the container it self making the drbd
> invisible for the inside users.

Which IMO is an improvement.
Why would you want to make it visisble.

> But it is what it is so we have to skip
> drbd from the cluster stack on container level.

I'd see the container be a *resource* manged by a cluster,
rather than being a cluster member itself.

But maybe I just don't get your use case yet ...

: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com

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