[one-users] VM fails to boot, "could not create domain" error

[Jim Bradfield]

I set up two fresh installs of Ubuntu 12.04 LTS yesterday, and followed the
Ubuntu with LVM quickstart guide (
http://docs.opennebula.org/4.4/design_and_installation/quick_starts/qs_ubuntu_kvm.html)
to the letter. The frontend is on 192.168.42.70, and the host is on
192.168.42.71. When I instantiate a VM, it gets through prolog and then
fails. The log reads as follows:

Tue Apr 1 11:35:24 2014 [DiM][I]: New VM state is ACTIVE.
Tue Apr 1 11:35:25 2014 [LCM][I]: New VM state is PROLOG.
Tue Apr 1 11:36:52 2014 [LCM][I]: New VM state is BOOT
Tue Apr 1 11:36:52 2014 [VMM][I]: Generating deployment file:
/var/lib/one/vms/5/deployment.0
Tue Apr 1 11:36:52 2014 [VMM][I]: ExitCode: 0
Tue Apr 1 11:36:52 2014 [VMM][I]: Successfully execute network driver
operation: pre.
Tue Apr 1 11:36:53 2014 [VMM][I]: Command execution fail: cat << EOT |
/var/tmp/one/vmm/kvm/deploy '/var/lib/one//datastores/0/5/deployment.0'
'192.168.42.71' 5 192.168.42.71
Tue Apr 1 11:36:53 2014 [VMM][I]: error: Failed to create domain from
/var/lib/one//datastores/0/5/deployment.0
Tue Apr 1 11:36:53 2014 [VMM][I]: error: internal error process exited
while connecting to monitor: kvm: -drive
file=/var/lib/one//datastores/0/5/disk.0,if=none,id=drive-ide0-0-0,format=qcow2,cache=none:
could not open disk image /var/lib/one//datastores/0/5/disk.0: Permission
denied
Tue Apr 1 11:36:53 2014 [VMM][I]:
Tue Apr 1 11:36:53 2014 [VMM][E]: Could not create domain from
/var/lib/one//datastores/0/5/deployment.0
Tue Apr 1 11:36:53 2014 [VMM][I]: ExitCode: 255
Tue Apr 1 11:36:53 2014 [VMM][I]: Failed to execute virtualization driver
operation: deploy.
Tue Apr 1 11:36:53 2014 [VMM][E]: Error deploying virtual machine: Could
not create domain from /var/lib/one//datastores/0/5/deployment.0
Tue Apr 1 11:36:54 2014 [DiM][I]: New VM state is FAILED

This issue occurs only when attempting to create a VM on the remote host
node; I added the node packages to the frontend and successfully created a
VM there (it's currently running and sitting on the login prompt when I
open the VNC for it; I still don't know how to actually log into it but
that's another issue entirely). Is this an issue with the NFS setup
described in the quick start? I'm not sure where to begin troubleshooting.
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