Hi all,
I've got a setup with a dual primary DRBD with over it a KVM virtual
machine, managed by a Virtualdomain resource.
In a classical primary-seconday setup, the declaration of the resource is:
primitive vm-test_r0 ocf:linbit:drbd \
params drbd_resource="r0" \
op monitor interval="20s" timeout="40s" \
op start interval="0" timeout="240s" \
op stop interval="0" timeout="100s"
ms vm-test_ms-r0 vm-test_r5 \
meta master-max="1" notify="true"
primitive vm-test_virtualdomain ocf:heartbeat:VirtualDomain \
params config="/etc/libvirt/qemu/vm-test.xml"
hypervisor="qemu:///system" \
meta allow-migrate="false" \
op monitor interval="10" timeout="30" depth="0" \
op start interval="0" timeout="120s" \
op stop interval="0" timeout="120s"
colocation vm-test_virtualdomain_ON_vm-test_ms-r0 inf:
vm-test_virtualdomain vm-test_ms-r0:Master
order vm-test_virtualdomain_AFTER_vm-test_ms-r0 inf:
vm-test_ms-r0:promote vm-test_virtualdomain:start
And it's perfectly clear that with this setup I cannot have live
migration, so, to change this I made this modifications, following
what's written in the dual drbd's documentation on clusterlabs:
primitive vm-test_r0 ocf:linbit:drbd \
params drbd_resource="r0" \
op monitor interval="20" role="Master" timeout="20" \
op monitor interval="30" role="Slave" timeout="20" \
op start interval="0" timeout="240s" \
op stop interval="0" timeout="100s"
ms vm-test_ms-r0 vm-test_r0 \
meta notify="true" master-max="2" interleave="true"
primitive vm-test_virtualdomain ocf:heartbeat:VirtualDomain \
params config="/etc/libvirt/qemu/vm-test.xml"
hypervisor="qemu:///system" migration_transport="ssh" \
meta allow-migrate="true" \
op monitor interval="10" timeout="30" depth="0" \
op start interval="0" timeout="120s" \
op stop interval="0" timeout="120s"
order vm-test_virtualdomain_AFTER_vm-test_ms-r0 inf:
vm-test_ms-r0:promote vm-test_virtualdomain:start
And here are my doubts, because without a colocation, the vm migrate
fine, but with a "classical" colocation like this:
colocation vm-test_virtualdomain_ON_vm-test_ms-r0 inf:
vm-test_virtualdomain vm-test_ms-r0:Master
things breaks up. Because for some reason (that i don't understand) the
destination drbd is promoted to secondary.
So, is it correct to not declare a colocation or is there a better way
to do what I'm doing?
Thanks a lot!
--
RaSca
Mia Mamma Usa Linux: Niente รจ impossibile da capire, se lo spieghi bene!
[email protected]
http://www.miamammausalinux.org
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