Hi, I am trying to upgrade ovirt from 3.6 to 4.0. I have backed up configuration on current CenTOS6 oVirt 3.6 manager with engine-backup, successfully restored it to a new CenTOS7 running 4.0, and trying to run ovirt-engine-rename. It always fails, and I am not sure where to look: /usr/share/ovirt-engine/setup/bin/ovirt-engine-rename [ INFO ] Stage: Initializing Welcome to the ovirt-engine-rename utility More details about the operation and possible implications of running this utility can be found here: http://www.ovirt.org/Changing_Engine_Hostname [ INFO ] Stage: Environment setup Configuration files: ['/etc/ovirt-engine-setup.conf.d/10-packaging-jboss.conf', '/etc/ovirt-engine-setup.conf.d/10-packaging.conf', '/etc/ovirt-engine-setup.conf.d/20-setup-ovirt-post.conf'] Log file: /var/log/ovirt-engine/setup/ovirt-engine-rename-20170127124705-a1y8is.log Version: otopi-1.5.2 (otopi-1.5.2-1.el7.centos) [ INFO ] Stage: Environment packages setup [ INFO ] Stage: Programs detection [ INFO ] Stage: Environment setup [ INFO ] Stage: Environment customization New fully qualified server name: []: newname.domain.com --== PRODUCT OPTIONS ==-- [ INFO ] Stage: Setup validation [ INFO ] Engine machine hosting Storage Domains The following Storage Domains use the engine machine as an NFS server: ISO_DOMAIN They will be modified to use the new name. [ INFO ] The following files will be updated: /etc/ovirt-engine/engine.conf.d/10-setup-protocols.conf /etc/ovirt-engine/imageuploader.conf.d/10-engine-setup.conf /etc/ovirt-engine/isouploader.conf.d/10-engine-setup.conf /etc/ovirt-engine/logcollector.conf.d/10-engine-setup.conf /etc/ovirt-engine/ovirt-vmconsole-proxy-helper.conf.d/10-setup.conf /etc/pki/ovirt-engine/cert.conf /etc/pki/ovirt-engine/cert.template /etc/pki/ovirt-engine/certs/apache.cer /etc/pki/ovirt-engine/keys/apache.key.nopass /etc/pki/ovirt-engine/keys/apache.p12 [ INFO ] Stage: Transaction setup [ INFO ] Stopping engine service [ INFO ] Stage: Misc configuration [ INFO ] Stage: Package installation [ INFO ] Stage: Misc configuration [ ERROR ] Failed to execute stage 'Misc configuration': 'NoneType' object is not iterable [ INFO ] Stage: Clean up Log file is located at /var/log/ovirt-engine/setup/ovirt-engine-rename-20170127124705-a1y8is.log [ INFO ] Generating answer file '/var/lib/ovirt-engine/setup/answers/20170127124714-rename.conf' [ INFO ] Stage: Pre-termination [ INFO ] Stage: Termination [ ERROR ] Execution of rename failed The only error log file has is not very helpful: 2017-01-27 12:47:14 ERROR otopi.plugins.ovirt_engine_common.base.core.misc misc._terminate:148 Execution of rename failed After that, engine actually gets renamed, but certificates are not generated for a new name, and this is, I think, is a reason why new server cannot communicate with vdsm on ovirt nodes. I do use custom Apache certificates. CA files are restored fine from backup. Where can I start looking next? Thank you!