Hi Mahfuj, Can you post the DEBUG log of MS and kvm agent. Thanks Rajesh Battala
-----Original Message----- From: Mahfuj Jia [mailto:mahfuj8114...@gmail.com] Sent: Tuesday, January 15, 2013 8:52 PM To: cloudstack-users@incubator.apache.org Subject: Host installed ok. Only problem appears to be with the System VMs coming up Hi, I am using CloudStack4 official installation guide and successfully installed the following things 1. One Management Server. (Linux Centos x86_64) 2. One KVM host server. (Linux Centos x86_64) Cloudstack 4.0 installation process: At Management Server: 1. Install cloud-client. (Successfully) 2. Install Mysql Server. (Succesfully) 3. Cloud Database Created. (Successfully) 4. NFS Server installed. (Successfully). 5. NFS Share. (Successfully) At Client Machine: 1. Install cloud-agent. (Successfully) 2. NFS mount. (Successfully) The main problem is after successfully adding host from CloudStack user interface when System VM coming up following exceptions has thrown *Exception while trying to start secondary storage vm* com.cloud.exception.AgentUnavailableException: Resource [Host:1] is unreachable: Host 1: Unable to start instance due to Unable to get answer that is of class com.cloud.agent.api.StartAnswer 2013-01-15 03:05:55,238 ERROR [cloud.vm.VirtualMachineManagerImpl] (secstorage-1:null) Failed to start instance VM[SecondaryStorageVm|s-142-VM] java.lang.ClassCastException: com.cloud.agent.api.Answer cannot be cast to com.cloud.agent.api.storage.PrimaryStorageDownloadAnswer 2013-01-15 03:05:55,580 INFO [cloud.secstorage.PremiumSecondaryStorageManagerImpl] (secstorage-1:null)*Primary secondary storage is not even started, wait until next turn * How I will solve this problem.Please if you have any recommendation tell me.