I need to migrate running VMs from one host in our cluster to another however the task keeps failing any time I start a migration.  The engine logs show a few different errors as follows. 2019-07-10 09:53:19,440-04 ERROR [org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] (ForkJoinPool-1-worker-2) [] Migration of VM 'vm1' to host 'ovirt-node-production3' failed: VM destroyed during the startup. 2019-07-10 09:53:06,542-04 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (default task-51) [c1daf639-ff39-4397-b1bf-09426cacf72d] EVENT_ID: VM_MIGRATION_FAILED(65), Migration failed due to a failed validation: [Cannot migrate VM. There is no host that satisfies current scheduling constraints. See below for details:, The host ovirt-node-production3 did not satisfy internal filter Memory.] (VM: vm2, Source: ovirt-node-production2). I also checked the vdsm.log on the destination host which is showing an error like this. ERROR (jsonrpc/2) [virt.vm] (vmId='f5bb25a8-3176-40b6-b21b-f07ed1089b27') Alias not found for device type balloon during migration at destination host (vm:5562) Does anybody know how to resolve this?  The destination host is able to run VMs and I've been able to move a few VMs by shutting down and doing a restart however I'd like to do a live migration if possible.