In VM migration on KVM, libvirt qemu hook script will change the bridge name to bridges for guest networks. It works for user vm. However for virtual router, it has nics on control network and public network. If control/public use different physical networks than guest network, virtual router cannot be migrated.
Fixes: #2783
This fixes the qemu hooks `mkdir` race condition which can happen when
too many VMs may launch on a KVM host executing the hooks script that
tries to `mkdir` for the custom directory. On exception (multiple scripts
trying to mkdir), the VM stops.
The custom directory need not be created if it does not exist, instead
the custom hooks should only execute when there is a custom directory.
Feature documentation:
http://docs.cloudstack.apache.org/en/4.11.2.0/adminguide/hosts.html#kvm-libvirt-hook-script-include
Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
KVM hook script include - logic to execute custom scripts & logging requirements
KVM hook script include - add logic to create custom directory if not exists & extra logging
Wei Zhou
Rohit Yadav
ernjvr
Rohit Yadav
Aaron Brady
Wei Zhou
Edison Su