I have upgraded to 4.5.1 and my hosts are now in Alert state. The logs show::
2015-07-28 10:24:16,412 WARN [c.c.h.x.r.CitrixResourceBase] (DirectAgent-2:ctx-5f118670) Failed to configure brige firewall 2015-07-28 10:24:16,413 WARN [c.c.h.x.r.CitrixResourceBase] (DirectAgent-2:ctx-5f118670) Check host 10.110.106.33 for CSP is installed or not and check network mode for bridge 2015-07-28 10:24:16,413 DEBUG [c.c.a.m.DirectAgentAttache] (DirectAgent-2:ctx-5f118670) Seq 1-6652942549533065217: Response Received: 2015-07-28 10:24:16,414 DEBUG [c.c.a.t.Request] (DirectAgent-2:ctx-5f118670) Seq 1-6652942549533065217: Processing: { Ans: , MgmtId: 233845174730253, via: 1, Ver: v1, Flags: 110, [{"com.cloud.agent.api.SetupAnswer":{"_reconnect":true,"result":false,"details":"Failed to configure brige firewall","wait":0}}] } 2015-07-28 10:24:16,415 DEBUG [c.c.a.t.Request] (AgentTaskPool-1:ctx-91ed8e17) Seq 1-6652942549533065217: Received: { Ans: , MgmtId: 233845174730253, via: 1, Ver: v1, Flags: 110, { SetupAnswer } } 2015-07-28 10:24:16,415 DEBUG [c.c.a.m.AgentAttache] (DirectAgent-2:ctx-5f118670) Seq 1-6652942549533065217: No more commands found 2015-07-28 10:24:16,415 WARN [c.c.h.x.d.XcpServerDiscoverer] (AgentTaskPool-1:ctx-91ed8e17) Unable to setup agent 1 due to Failed to configure brige firewall 2015-07-28 10:24:16,416 INFO [c.c.u.e.CSExceptionErrorCode] (AgentTaskPool-1:ctx-91ed8e17) Could not find exception: com.cloud.exception.ConnectionException in error code list for exceptions 2015-07-28 10:24:16,416 WARN [c.c.a.m.AgentManagerImpl] (AgentTaskPool-1:ctx-91ed8e17) Monitor XcpServerDiscoverer says there is an error in the connect process for 1 due to Reinitialize agent after setup. 2015-07-28 10:24:16,416 INFO [c.c.a.m.AgentManagerImpl] (AgentTaskPool-1:ctx-91ed8e17) Host 1 is disconnecting with event AgentDisconnected 2015-07-28 10:24:16,419 DEBUG [c.c.a.m.AgentManagerImpl] (AgentTaskPool-1:ctx-91ed8e17) The next status of agent 1is Alert, current status is Connecting 2015-07-28 10:24:16,419 DEBUG [c.c.a.m.AgentManagerImpl] (AgentTaskPool-1:ctx-91ed8e17) Deregistering link for 1 with state Alert 2015-07-28 10:24:16,419 DEBUG [c.c.a.m.AgentManagerImpl] (AgentTaskPool-1:ctx-91ed8e17) Remove Agent : 1 I am using basic networking and my hosts do have bridge networking enabled. On the hosts I see this error: [30339] 2015-07-28 11:03:01.076524 FAILED: (rc 1) stdout: 'ipset v4.5, protocol version 4. ', stderr: 'FATAL: Module ip_set not found. ipset v4.5: Couldn't verify kernel module version! ' This is problem I had a year ago on a different deployment, the CSP has not been updated to be compatible with the latest XenServer patches/hotfixes. That forced me to have to start from scratch on that deployment as I could not figure out a solution then. I would rather not go down that path this time. Looks like my options are: 1) Find/build a CSP compatible with my XenServer kernel. 2) Upgrade to XenServer 6.5. >From my prior experience, option 1 does not seem likely. This is as far as I got last year: http://mail-archives.apache.org/mod_mbox/cloudstack-dev/201407.mbox/%3cfa005fbb-c0d5-471c-92a8-eb79b3b89...@gmail.com%3E I would like to upgrade to 6.5 and was planning on following this blog post after the ACS 4.5.1 upgrade: http://www.shapeblue.com/how-to-upgrade-an-apache-cloudstack-citrix-xenserver-cluster/. Is it safe to do so in the current state I am in? Thanks, Carlos