I have an Ovirt installation with a hosted engine and three hosts. Using Gluster as the storage for the VMs. Ovirt: 4.4.6.7 Hosts: CentOS Stream release 8 (updated to latest) So far so good. I am trying to add a new host to the cluster with the same OS and hardware as the others and I cannot get it to install, it gives me all kind of errors and it will not install. I reinstalled the OS and I am getting the same results. DNS is configured properly and working ok for all hosts. I can see this error in this log file ansible-runner-service.log: 2021-05-30 15:46:38,319 - runner_service.services.hosts - ERROR - SSH - NOAUTH:SSH auth error - passwordless ssh not configured for 'ovirt4' (sshd is configured exactly the same as all other hosts and I can login to this host without a password from the ovirt hosted engine) I see these errors in the log engine.log: 2021-05-30 16:22:35,166Z ERROR [org.ovirt.vdsm.jsonrpc.client.reactors.Reactor] (SSL Stomp Reactor) [] Unable to process messages PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target 2021-05-30 16:22:35,175Z ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-32) [] EVENT_ID: VDS_BROKER_COMMAND_FAILURE(10,802), VDSM ovirt4.net.miami.edu command Get Host Capabilities failed: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target 2021-05-30 16:22:35,175Z ERROR [org.ovirt.engine.core.vdsbroker.monitoring.HostMonitoring] (EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-32) [] Unable to RefreshCapabilities: VDSNetworkException: VDSGenericException: VDSNetworkException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target 2021-05-30 16:22:35,597Z ERROR [org.ovirt.engine.core.bll.gluster.GlusterSyncJob] (EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-23) [] Error while refreshing server data for cluster 'Default' from database: null I tried reinstalling, rebooting, put it in maintenance, enroll the certificate, check for Upgrades, rebooted multiple times both the hosts and the ovirt engine: nothing works. What am I doing wrong? Thank you in advance for your help.