[DRBD-user] Single Primary with Missing Secondary

David Hansel hanselzen at gmail.com
Wed May 7 12:14:52 CEST 2008

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


Hi Niko,

May i know your drbd version?
I've tried this before on 8.2.5 and it can't be done.
When i force drbd to be a primary, the error message appear said that
at least need 2 node to make it done.


On Tue, May 6, 2008 at 5:31 AM, N.J. van der Horn (Nico)
<nico at vanderhorn.nl> wrote:
> Hi Paul !
>
>  Yes, that is perfectly possible, i did that several times.
>  Just build the first node and use it as primary.
>  There is no obstacle to use it and work with it until the loving
> brother/sister comes in sight. ;-)
>  When you later add the second one, you start the initial sync, then start
> heartbeat also there.
>  Ok, this is a short answer....
>
>  Greets, Nico
>
>  Paul McEnery schreef:
>
> >
> >
> >
> > Hi All.
> >
> > Is it possible to initialise drbd on only one node, with a view to adding
> a second node at a later date (once it has been purchased)?
> >
> > I have a single server which needs to be setup as a storage server
> presenting iSCSI luns to a number of other systems. The idea is that if the
> system works successfully, a second redundant storage server will be
> purchased which will mirror the primary (drbd + heartbeat). I am trying to
> set the primary up so that I can simply activate the secondary node once it
> has been purchased, without the need to rebuild from scratch. The only
> analogy I can think of is; this is similar to building a RAID 1 mirror on a
> single disk, specifying the second disk as "missing", as mdadm allows you to
> do. Once you purchase a second disk, you can simply copy the partition table
> and use mdadm to bring the disk into the array. Essentially, I would like to
> do the same with drbd, where the second node is not available from the
> outset, and may not be available for a few months.
> >
> > Does anyone know if this is possible with drbd? If not, I am starting to
> think along the lines of using a qemu secondary node during initial setup,
> which is later discarded. Can anyone think of an easier way for me to get a
> single node to become primary having never communicated with the secondary?
> >
> > TIA
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
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> > drbd-user at lists.linbit.com
> > http://lists.linbit.com/mailman/listinfo/drbd-user
> >
> >
>
>  --
>  Behandeld door / Handled by: N.J. van der Horn (Nico)
>  ---
>  ICT Support Vanderhorn IT-works, www.vanderhorn.nl,
>  Voorstraat 55, 3135 HW Vlaardingen, The Netherlands,
>  Tel +31 10 2486060, Fax +31 10 2486061
>
>
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>



-- 
Best Regards,
David Hansel



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