[Pacemaker] DRBD / KVM / Pacemaker active/active

[Nick Morrison]

Hello,

Noob question again.

I keep reading about people running primary/primary drbd pairs with Xen on top to do live migration.

Can someone doing so please comment: is this setup safe? How do you ensure that the two hosts don't both start the same guest? Does you use an external locking mechanism? Or do you use a cluster-aware filesystem?

Cheers!
Nick
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