[ClusterLabs] SAN, pacemaker, KVM: live-migration with ext3 ?

Andrei Borzenkov arvidjaar at gmail.com
Wed Sep 5 13:55:38 EDT 2018

05.09.2018 19:13, Lentes, Bernd пишет:
> Hi guys,
> just to be sure. I thought (maybe i'm wrong) that having a VM on a shared storage (FC SAN), e.g. in a raw file on an ext3 fs on that SAN allows live-migration because pacemaker takes care that the ext3 fs is at any time only mounted on one node.

While live migration requires concurrent access from both nodes at the
same time.

> I tried it, but "live"-migration wasn't possible. The vm was always shutdown before migration. Or do i need OCFS2 ?

You need to be able to access image from both nodes at the same time. If
image is on file system, it must be clustered filesystem. Or just use
raw device for image as already suggested.

> Could anyone clarifies this ?
> Bernd

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