[Drbd-dev] SCTP support for drbd

[Lars Ellenberg]

On Fri, Oct 16, 2009 at 12:38:45PM +0200, Lars Marowsky-Bree wrote:
> Hi all,
> 
> Florian asked me to post this to the list.
> 
> As you know, OpenAIS/corosync supports, similar to but slightly more
> broken than heartbeat, redundant rings to provide redundant networking.
> 
> On SLE HA 11 GA, we recommended that customers not use this, but instead
> use bonded NICs. This was not just because of the limitations in
> OpenAIS, but also because of the limitations of the services we consider
> essential.
> 
> The DLM, for example, was not able to take automatic advantage of the
> redundant links - SCTP support was a bit flakey then. This is changed
> (the kernel DLM already supports SCTP, and the patch for automatic
> enablement in libdlm is bound to be done in a few days).
> 
> The other service is drbd, which also uses TCP-only right now. It'd be
> nice if it also supported SCTP; it can't be that hard, since the
> in-kernel dlm also supports TCP and SCTP.

Is somewhere on our todo list,
but may have to wait for DRBD 9.
Feature sponsoring accepted ;)

> As a further consideration, I'd like to point out how cool it'd be if
> drbd could also, like the DLM, default to gathering its network
> information from the OpenAIS/corosync layer (perhaps via a
> drbd_controld); the peers could auto-detect each other based on the
> UUID/label of the drbd instance being activated.  It'd reduce the need
> to duplicate information between configuration files for the most common
> scenarios.
>
> (This would also be an extremely convenient and even neater way for
> floating peers.)

-EPONIES

proof of concept implementations may be reviewed, though ;)

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

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