HA and live migration on ISCSI with multipath possible or not ?

[dernikov1]

Hi to all, i need help to clarify dilemma about HA, live migration, iscsi with multipathing shared storage.

Is it possible to have enabled, HA and live migration functions at same time,
on iscsi shared storage with multipathing (with lvm, we are not using iscsi direct).

While i can configure iscsi target, with lvm on LUNs, there is no multipath support in that way.
I cant use NFS because storage don't have support for it, and it is not clear to me,
why is nfs option working, and iscsi dont. They are same type of storage "shared".

As i can see, HA and live migration differs in only one point, cause of trigger migration.
In HA, that is failure, malfunction of node, in second (live migration) it is manually triggered
(or in a future with scripting depending on load or something else, power saving for example),
but in a nutshell those are same actions.
I need help to clarify how those two process work in details, what is happening with VM memory, definitions, and VM storage at time of live migration, with HA all definition must exist on all nodes, as i can figure for now.

Thanks for help !

 

[dietmar]

Is it possible to have enabled, HA and live migration functions at same time,
on iscsi shared storage with multipathing (with lvm, we are not using iscsi direct).

Yes. What problem do you have exactly?