Hi,
Just add a Master role for drbd resource in the colocation. Default is
Started (or Slave).
Philip Schiller <p.schil...@plusoptix.de> 12 апреля 2023 г. 11:28:57 написал:
Hi All, I am using a simple two-nodes cluster with Zvol -> DRBD -> Virsh in
primary/primary mode (necessary for live migration). My configuration:
primitive pri-vm-alarmanlage VirtualDomain \ params
config="/etc/libvirt/qemu/alarmanlage.xml" hypervisor="qemu:///system"
migration_transport=ssh \ meta allow-migrate=true target-role=Started
is-managed=true \ op monitor interval=0 timeout=120 \ op start interval=0
timeout=120 \ op stop interval=0 timeout=1800 \ op migrate_to interval=0
timeout=1800 \ op migrate_from interval=0 timeout=1800 \ utilization cpu=2
hv_memory=4096
ms mas-drbd-alarmanlage pri-drbd-alarmanlage \ meta clone-max=2
promoted-max=2 notify=true promoted-node-max=1 clone-node-max=1
interleave=true target-role=Started is-managed=true
colocation colo_mas_drbd_alarmanlage_with_clo_pri_zfs_drbd-storage inf:
mas-drbd-alarmanlage clo-pri-zfs-drbd_storage
location location-pri-vm-alarmanlage-s0-200 pri-vm-alarmanlage 200: s1
order ord_pri-alarmanlage-after-mas-drbd-alarmanlage Mandatory:
mas-drbd-alarmanlage:promote pri-vm-alarmanlage:start So to summerize:
- A resource for Virsh
- A Master/Slave DRBD ressources for the VM filesystem . - a "order"
directive to start the VM after drbd has been promoted. Node startup is ok,
the VM is started after DRBD is promoted.
Migration with virsh or over crm <crm resource move pri-vm-alarmanlage s0>
works fine. Node standby is problematic. Assuming the Virsh VM runs on node
s1 : When puting node s1 in standby when node s0 is active, a live
migration is started, BUT in the same second, pacemaker tries to demote
DRBD volumes on s1 (while live migration is in progress). All this results
in "stopping the vm" on s1 and starting the "vm on s0". I do not understand
why pacemaker does demote/stop DRBD volumes before VM is migrated.
Do i need additional constraints? Setup is done with - Corosync Cluster
Engine, version '3.1.6'
- Pacemaker 2.1.2
- Ubuntu 22.04.2 LTS Thanks for your help, with kind regards Philip
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