[ClusterLabs] SAN, pacemaker, KVM: live-migration with ext3 ?
mark at openvs.co.uk
Wed Sep 5 16:19:41 EDT 2018
What I am struggling to understand here, is why it is being referred to as
a "SAN" when it is not concurrently available... how are you mounting this
"SAN" on each host?
On 5 September 2018 at 18:55, Andrei Borzenkov <arvidjaar at gmail.com> wrote:
> 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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