Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On 2013-07-05T13:14:44, Jarno Elonen <jarno.elonen at housemarque.fi> wrote:
> 1) Is there a Pacemaker script (ocf?) that could do Xen live migration
> through *temporary* dual primary mode?
No. But this is actually not needed at all.
What you want is a Xen block script that switches the primary/secondary
mode at the right time. (That is probably not feasible with pacemaker
managing the DRBD instance.)
With each DRBD instance dedicated to a single VM, that ought to work
fine.
The VM never actually accesses the block storage from both nodes
concurrently.
There shouldn't be a need for dual-primary headaches here. The script
should not be too hard; you can likely look at block-dmmd and model on
that.
Regards,
Lars
--
Architect Storage/HA
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"Experience is the name everyone gives to their mistakes." -- Oscar Wilde