Dear friends ,
( i send the same messages again in order to conform with the forum text
formatting )
Many Thanks for your brilliant answers ,
Ken your suggestion :
"The second problem is that you have an ordering constraint but no
colocation constraint. With your current setup, windows_VM has to start
after the storage, but it doesn't have to start on the same node. You
need a colocation constraint as well, to ensure they start on the sam
node."*
*
for the storage i have the following complete steps:
pcs resource create ProcDRBD_SigmaVMs ocf:linbit:drbd
drbd_resource=sigma_vms drbdconf=/etc/drbd.conf op monitor interval=10s
pcs resource master clone_ProcDRBD_SigmaVMs ProcDRBD_SigmaVMs
master-max=1 master-node-max=1 clone-max=2 clone-node-max=1 notify=true
pcs resource create StorageDRBD_SigmaVMs Filesystem device="/dev/drbd1"
directory="/opt/sigma_vms/" fstype="ext4"
pcs constraint location clone_ProcDRBD_SigmaVMs prefers sgw-01
pcs constraint colocation add StorageDRBD_SigmaVMs with
clone_ProcDRBD_SigmaVMs INFINITY with-rsc-role=Master
pcs constraint order promote clone_ProcDRBD_SigmaVMs then start
StorageDRBD_SigmaVMs*
*
and when i create the VM
pcs resource create windows_VM_res VirtualDomain
hypervisor="qemu:///system"
config="/opt/sigma_vms/xml_definitions/windows_VM.xml"
pcs constraint colocation add windows_VM_res with StorageDRBD_SigmaVMs
INFINITY
pcs constraint order start StorageDRBD_SigmaVMs_rers then start windows_VM *
*
My question is :
are the below steps enough to ensure that the new VM will be placed on
the node 1 ?
(storage process prefers node 1 (the primary of drbd) with weight
INFINITY, windows_VM should be placed with StorageDRBD_SigmaVMs always
and from transitive rule windows_VM should be placed on node1
(assume that ---> means prefer)Â storage --> node1 , windows --->
storage thus from transitive rule windows_VM ---> node1
pcs constraint location clone_ProcDRBD_SigmaVMs prefers sgw-01
pcs constraint colocation add windows_VM_res with StorageDRBD_SigmaVMs
INFINITY
pcs constraint order start StorageDRBD_SigmaVMs_rers then start windows_VM
Sincerely
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