I've just upgraded my test environment from ovirt 4.2 to 4.3.4. System has only one host (Centos 7.6.1810) and run a self hosted engine. After upgrade I'm not able to run vdsmd (and so hosted engine....) Above the error in log: journalctl -xe -- L'unità libvirtd.service ha iniziato la fase di avvio. giu 24 18:09:17 ovirt01.hawai.lan libvirtd[8176]: 2019-06-24 16:09:17.006+0000: 8176: info : libvirt version: 4.5.0, package: 10.el7_6.12 (CentOS BuildSystem <http://bugs.centos.org>, 2019-06-20-15:01:15, x86-01.bsys. giu 24 18:09:17 ovirt01.hawai.lan libvirtd[8176]: 2019-06-24 16:09:17.006+0000: 8176: info : hostname: ovirt01.hawai.lan giu 24 18:09:17 ovirt01.hawai.lan libvirtd[8176]: 2019-06-24 16:09:17.006+0000: 8176: error : virNetTLSContextLoadCertFromFile:513 : Unable to import server certificate /etc/pki/vdsm/certs/vdsmcert.pem giu 24 18:09:17 ovirt01.hawai.lan systemd[1]: libvirtd.service: main process exited, code=exited, status=6/NOTCONFIGURED giu 24 18:09:17 ovirt01.hawai.lan systemd[1]: Failed to start Virtualization daemon. -- Subject: L'unità libvirtd.service è fallita