Hi, I used CentOS-7-x86_64-Minimal-1511.iso to install the hosts and the engine. The 1st host and the hosted-engine were installed successfully, but the 2nd host setup failed with this error message: "Failed to execute stage 'Setup validation': Metadata version 2 from host 52 too new for this agent (highest compatible version: 1)" Here is the packages versions: [root@host02 ~]# rpm -qa | grep ovirt libgovirt-0.3.3-1.el7_2.1.x86_64 ovirt-vmconsole-1.0.0-1.el7.centos.noarch ovirt-vmconsole-host-1.0.0-1.el7.centos.noarch ovirt-host-deploy-1.4.1-1.el7.centos.noarch ovirt-hosted-engine-ha-1.3.5.1-1.el7.centos.noarch ovirt-hosted-engine-setup-1.3.4.0-1.el7.centos.noarch ovirt-release36-007-1.noarch ovirt-engine-sdk-python-3.6.3.0-1.el7.centos.noarch ovirt-setup-lib-1.0.1-1.el7.centos.noarch [root@engine ~]# rpm -qa | grep ovirt ovirt-engine-setup-base-3.6.4.1-1.el7.centos.noarch ovirt-engine-setup-plugin-ovirt-engine-common-3.6.4.1-1.el7.centos.noarch ovirt-vmconsole-proxy-1.0.0-1.el7.centos.noarch ovirt-engine-tools-3.6.4.1-1.el7.centos.noarch ovirt-engine-vmconsole-proxy-helper-3.6.4.1-1.el7.centos.noarch ovirt-host-deploy-1.4.1-1.el7.centos.noarch ovirt-release36-007-1.noarch ovirt-engine-sdk-python-3.6.3.0-1.el7.centos.noarch ovirt-iso-uploader-3.6.0-1.el7.centos.noarch ovirt-engine-extensions-api-impl-3.6.4.1-1.el7.centos.noarch ovirt-setup-lib-1.0.1-1.el7.centos.noarch ovirt-host-deploy-java-1.4.1-1.el7.centos.noarch ovirt-engine-cli-3.6.2.0-1.el7.centos.noarch ovirt-engine-setup-plugin-websocket-proxy-3.6.4.1-1.el7.centos.noarch ovirt-vmconsole-1.0.0-1.el7.centos.noarch ovirt-engine-backend-3.6.4.1-1.el7.centos.noarch ovirt-engine-dbscripts-3.6.4.1-1.el7.centos.noarch ovirt-engine-webadmin-portal-3.6.4.1-1.el7.centos.noarch ovirt-engine-setup-3.6.4.1-1.el7.centos.noarch ovirt-engine-3.6.4.1-1.el7.centos.noarch ovirt-engine-setup-plugin-vmconsole-proxy-helper-3.6.4.1-1.el7.centos.noarch ovirt-guest-agent-common-1.0.11-1.el7.noarch ovirt-engine-wildfly-8.2.1-1.el7.x86_64 ovirt-engine-wildfly-overlay-8.0.5-1.el7.noarch ovirt-engine-websocket-proxy-3.6.4.1-1.el7.centos.noarch ovirt-engine-restapi-3.6.4.1-1.el7.centos.noarch ovirt-engine-userportal-3.6.4.1-1.el7.centos.noarch ovirt-engine-setup-plugin-ovirt-engine-3.6.4.1-1.el7.centos.noarch ovirt-image-uploader-3.6.0-1.el7.centos.noarch ovirt-engine-extension-aaa-jdbc-1.0.6-1.el7.noarch ovirt-engine-lib-3.6.4.1-1.el7.centos.noarch Here are the log files: https://gist.github.com/weeix/1743f88d3afe1f405889a67ed4011141 -- Wee