Hi all,
currently running 5.4.1 OpenNebula succefully, i can log to suntone, creat real hosts.
but when trying to creat my first VM, it says always that it FAILED !!
i found a lot of similar issues, but none of them is clear for me.
here is my VM log 
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Wed Nov 22 13:25:53 2017 [Z0][VM][I]: New state is HOLD
Wed Nov 22 13:26:04 2017 [Z0][VM][I]: New state is PENDING
Wed Nov 22 13:26:33 2017 [Z0][VM][I]: New state is ACTIVE
Wed Nov 22 13:26:33 2017 [Z0][VM][I]: New LCM state is PROLOG
Wed Nov 22 13:26:37 2017 [Z0][VM][I]: New LCM state is BOOT
Wed Nov 22 13:26:37 2017 [Z0][VMM][I]: Generating deployment file: /var/lib/one/vms/10/deployment.0
Wed Nov 22 13:26:39 2017 [Z0][VMM][I]: Successfully execute transfer manager driver operation: tm_context.
Wed Nov 22 13:26:39 2017 [Z0][VMM][I]: Successfully execute network driver operation: pre.
Wed Nov 22 13:26:39 2017 [Z0][VMM][I]: Command execution fail: cat << EOT | /var/tmp/one/vmm/kvm/deploy ‘/var/lib/one//datastores/0/10/deployment.0’ ‘node01’ 10 node01
Wed Nov 22 13:26:39 2017 [Z0][VMM][I]: error: Failed to create domain from /var/lib/one//datastores/0/10/deployment.0
Wed Nov 22 13:26:39 2017 [Z0][VMM][I]: error: invalid argument: could not find capabilities for arch=x86_64 domaintype=kvm
Wed Nov 22 13:26:39 2017 [Z0][VMM][E]: Could not create domain from /var/lib/one//datastores/0/10/deployment.0
Wed Nov 22 13:26:39 2017 [Z0][VMM][I]: ExitCode: 255
Wed Nov 22 13:26:39 2017 [Z0][VMM][I]: Failed to execute virtualization driver operation: deploy.
Wed Nov 22 13:26:39 2017 [Z0][VMM][E]: Error deploying virtual machine: Could not create domain from /var/lib/one//datastores/0/10/deployment.0
Wed Nov 22 13:26:39 2017 [Z0][VM][I]: New LCM state is BOOT_FAILURE
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let the force be with you