Dear Greg, I configured 4 hosts. (see tab) "rhnode" is a real-node, all other are test-hosts. IP with 192.... are RFC1918. if I click on the link host:rhnode:install nothing happens. rhnode:/root/.ssh/authorized_keys already configured Howto understanding ovirt communication? ovirt-engine.py ----- node:vdsm:46463 ---- node:libvirt:16509 | sql-db:5432 Is this correct? Regards Heiko Host: 1 - 4 Name Kommentar Hostname/IP Cluster Data-Center Status Virtuelle Maschinen Arbeitsspeicher CPU Netzwerk SPM elmo t2e 141.xxx.xxx.244 Default Default InstallFailed 0 0% 0% 0% Normal leni t1i 192.xxx.xxx.198 Default Default NonResponsive 0 0% 0% 0% Normal mb_h1 t3xen 141.xxx.xxx.240 Default Default NonResponsive 0 0% 0% 0% Normal rhnode t4node 192.xxx.xxx.153 Default Default InstallFailed 0 0% 0% 0% Normal [1] hxxps://w3.fh-lausitz.de/alfresco/d/d/workspace/SpacesStore/57a7fb3c-f344-4617-9b15-df48247b1500/vdsm.log-190214 [2] hxxps://w3.fh-lausitz.de/alfresco/d/d/workspace/SpacesStore/5aa5663b-db98-4cd3-90da-63a132e29175/engine.log-20190213.a.gz [3] hxxps://w3.fh-lausitz.de/alfresco/d/d/workspace/SpacesStore/9494a8a5-7a01-4dfb-b7b7-7f43f5a65518/engine.log-20190214.a.gz links expires on one week