Hi, I have a two node + engine ovirt setup, and I was having problems doing a live migration between nodes. I looked in the vdsm logs and noticed selinux errors, so I checked the selinux config, and both the ovirt-engine host and one of the nodes had selinux disabled. So I thought I would enable it on these two hosts, as it is officially supported anyway. I started with the node, and put it into maintenance mode, which interestingly, migrated the VMs off to the other node without issue. After modifying the selinux config, I then rebooted that node, which came back up. I then tried to activate the node but it fails and marks it as unresponsive. From the log: ----------8<---------- 2016-04-28 16:34:31,326 INFO [org.ovirt.vdsm.jsonrpc.client.reactors.ReactorClient] (SSL Stomp Reactor) [29acb18b] Connecting to kvm-ldn-02.ldn.framestore.com/172.16.75.189 2016-04-28 16:34:31,327 ERROR [org.ovirt.engine.core.vdsbroker.vdsbroker.GetCapabilitiesVDSCommand] (DefaultQuartzScheduler_Worker-32) [ac322cb] Command 'GetCapabilitiesVDSCommand(HostName = kvm-ldn-02, VdsIdAndVdsVDSCommandParametersBase:{runAsync='true', hostId='b12c0b80-d64d-42fd-8a55-94f92b9ca3aa', vds='Host[kvm-ldn-02,b12c0b80-d64d-42fd-8a55-94f92b9ca3aa]'})' execution failed: org.ovirt.vdsm.jsonrpc.client.ClientConnectionException: Connection failed 2016-04-28 16:34:31,327 ERROR [org.ovirt.engine.core.vdsbroker.HostMonitoring] (DefaultQuartzScheduler_Worker-32) [ac322cb] Failure to refresh Vds runtime info: org.ovirt.vdsm.jsonrpc.client.ClientConnectionException: Connection failed 2016-04-28 16:34:31,327 ERROR [org.ovirt.engine.core.vdsbroker.HostMonitoring] (DefaultQuartzScheduler_Worker-32) [ac322cb] Exception: org.ovirt.engine.core.vdsbroker.vdsbroker.VDSNetworkException: org.ovirt.vdsm.jsonrpc.client.ClientConnectionException: Connection failed at org.ovirt.engine.core.vdsbroker.vdsbroker.VdsBrokerCommand.createNetworkException(VdsBrokerCommand.java:157) [vdsbroker.jar:] at org.ovirt.engine.core.vdsbroker.vdsbroker.VdsBrokerCommand.executeVDSCommand(VdsBrokerCommand.java:120) [vdsbroker.jar:] at org.ovirt.engine.core.vdsbroker.VDSCommandBase.executeCommand(VDSCommandBase.java:65) [vdsbroker.jar:] at org.ovirt.engine.core.dal.VdcCommandBase.execute(VdcCommandBase.java:33) [dal.jar:] at org.ovirt.engine.core.vdsbroker.ResourceManager.runVdsCommand(ResourceManager.java:467) [vdsbroker.jar:] at org.ovirt.engine.core.vdsbroker.VdsManager.refreshCapabilities(VdsManager.java:652) [vdsbroker.jar:] at org.ovirt.engine.core.vdsbroker.HostMonitoring.refreshVdsRunTimeInfo(HostMonitoring.java:119) [vdsbroker.jar:] at org.ovirt.engine.core.vdsbroker.HostMonitoring.refresh(HostMonitoring.java:84) [vdsbroker.jar:] at org.ovirt.engine.core.vdsbroker.VdsManager.onTimer(VdsManager.java:227) [vdsbroker.jar:] at sun.reflect.GeneratedMethodAccessor120.invoke(Unknown Source) [:1.8.0_71] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0_71] at java.lang.reflect.Method.invoke(Method.java:497) [rt.jar:1.8.0_71] at org.ovirt.engine.core.utils.timer.JobWrapper.invokeMethod(JobWrapper.java:81) [scheduler.jar:] at org.ovirt.engine.core.utils.timer.JobWrapper.execute(JobWrapper.java:52) [scheduler.jar:] at org.quartz.core.JobRunShell.run(JobRunShell.java:213) [quartz.jar:] at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:557) [quartz.jar:] Caused by: org.ovirt.vdsm.jsonrpc.client.ClientConnectionException: Connection failed at org.ovirt.vdsm.jsonrpc.client.reactors.ReactorClient.connect(ReactorClient.java:157) [vdsm-jsonrpc-java-client.jar:] at org.ovirt.vdsm.jsonrpc.client.JsonRpcClient.getClient(JsonRpcClient.java:114) [vdsm-jsonrpc-java-client.jar:] at org.ovirt.vdsm.jsonrpc.client.JsonRpcClient.call(JsonRpcClient.java:73) [vdsm-jsonrpc-java-client.jar:] at org.ovirt.engine.core.vdsbroker.jsonrpc.FutureMap.<init>(FutureMap.java:68) [vdsbroker.jar:] at org.ovirt.engine.core.vdsbroker.jsonrpc.JsonRpcVdsServer.getCapabilities(JsonRpcVdsServer.java:268) [vdsbroker.jar:] at org.ovirt.engine.core.vdsbroker.vdsbroker.GetCapabilitiesVDSCommand.executeVdsBrokerCommand(GetCapabilitiesVDSCommand.java:15) [vdsbroker.jar:] at org.ovirt.engine.core.vdsbroker.vdsbroker.VdsBrokerCommand.executeVDSCommand(VdsBrokerCommand.java:110) [vdsbroker.jar:] ... 14 more ----------8<---------- Any ideas? Thanks, Cam