[DRBD-user] Device monitor script for drbd-0.7.x

[Shallyee Shang]

Thanks for your reply.

> The full logic which side of the two you might want to promote to
> primary is somewhat more complex, in particular if they are internally
> split...

Yes, I can imagine that the logic may not that simple. I think probe
is import for a really used cluster, don't the experts over there plan to
privide such functions?

> With what cluster manager are you trying to integrate drbd?

I am planning to try heartbeat and MatrixHA.
Heartbeat has no buildin resource monitor, I am considering mon
from http://www.kernel.org/software/mon/.

Yours,
Shallyee

----- Original Message ----- 
From: "Lars Marowsky-Bree" <lmb at suse.de>
To: <drbd-user at lists.linbit.com>
Sent: Wednesday, September 15, 2004 4:57 PM
Subject: Re: [DRBD-user] Device monitor script for drbd-0.7.x


> On 2004-09-15T10:39:55,
>    Shallyee Shang <shallyee.shang at jp.sony.com> said:
>
> > I am trying write a script under drbd-0.7.x, which can probe if a drbd
> > device can transfer to primary state when it receive a "drbdadm primary ..."
> > command. Device monitor will call this script to determine if a device
> > is avaliable.
> >
> > "drbdadm state" command tells device's status, which may help me
> > make the decision. I can get a state list by greping drbd source code,
> > I guess these are all that "state" command can tell, but I don't understand
> > which state can transfer to primary state.
> >
> > Can anyone teach me about this, or advise me a good way to write a
> > monitor script?
>
> Any drbd which is not "Inconsistent" can become master; even a
> SyncTarget can become master as long as it is connected to the
> SyncSource.
>
> The full logic which side of the two you might want to promote to
> primary is somewhat more complex, in particular if they are internally
> split...
>
> With what cluster manager are you trying to integrate drbd?
>
>
> Sincerely,
>     Lars Marowsky-Brée <lmb at suse.de>
>
> -- 
> High Availability & Clustering
> SUSE Labs, Research and Development
> SUSE LINUX AG - A Novell company
>
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