Hi list, I'm using OVS as backend for guest networking on my hypervisors. VLAN configuration for each interface is specified into the guest XML definition. When I need to change VLAN configuration of a running guest, I first edit the inactive XML to keep the changes for future boots, then I use ovs-vsctl to instruct the changes on the existing OVS Port. The problem happen when the guest is migrated to another hypervisor. The "active" XML is used to instantiate the VM on the destination and this XML doesn't incorporate the changes made to the inactive one. All the changes made on source are lost on the running guest at destination. I'm looking for a solution to this problem: - IFAIK, I cannot edit the "active" XML myself other than by using provided Libvirt API (like attach-device), and such API doesn't exists for VLANs modification on OVS interface - I cannot use a migration hook to pass changes made to the inactive XML into the active one because the inactive XML is not reachable from the hook - I found a patch allowing to transport some information attached to an OVS port during migration[1]. Unfortunately, this patch doesn't transport the VLAN configuration - Modification of the active XML during the migration itself is not desirable because it will complicate the migration process by requesting an external tool Did I miss something to achieve VLAN configuration migration? How to implement that into the Libvirt properly? Thanks! Antoine [1] https://www.redhat.com/archives/libvir-list/2012-September/msg01092 .html
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