Migration dest vm cleanup refactor#6766
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Add optional destination VM backup/cleanup functionality to MigrationBase: - New parameter 'do_destination_vm_backup' (default: no) to enable feature - Accept optional remote_virsh session for destination host operations - Check if VM exists on destination before migration - Fail test if destination VM is running (blocker condition) - Backup and undefine pre-existing stopped VMs to avoid conflicts - Use comprehensive undefine options (--nvram, --managed-save, etc.) - Restore destination VM in cleanup_default() Update migration_iommu_device test: - Add setup_remote_virsh_session() helper function - Create single remote virsh session shared across test operations - Refactor check_iommu_xml() to reuse remote session (no duplication) - Add cleanup_default() call in finally block - Properly close remote session in finally block This allows migration tests to run on non-clean environments without depending on destination host state. AI assisted code and commit. Human reviewed. Signed-off-by: hholoubk <hholoubk@redhat.com> migration: refactor base_steps connection params Refactor MigrationBase to cache destination host credentials and reuse them across methods, and extract destination VM backup/undefine flow into a helper method. AI assisted code and commit. Human reviewed. Signed-off-by: hholoubk <hholoubk@redhat.com> migration: restore pre-existing destination VM from backup When do_destination_vm_backup is enabled, include destination host info in logs, fail with clearer message if the destination VM is running, and restore a backed-up destination VM by copying its XML file to the destination host before defining it via remote virsh. AI assisted code and commit. Human reviewed. Signed-off-by: hholoubk <hholoubk@redhat.com> migration: skip undefine when destination VM is absent When destination VM backup is enabled, return early if the VM does not exist on the destination host, and enable debug logging for the existence/running-state checks. AI assisted code and commit. Human reviewed. Signed-off-by: hholoubk <hholoubk@redhat.com>
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Only call destination VM backup/undefine helper when do_destination_vm_backup is enabled, and drop the redundant guard from the helper. AI assisted code and commit. Human reviewed. Signed-off-by: hholoubk <hholoubk@redhat.com>
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