While setting up Openstack with shared storage , If we get following error while creating a instance ensure that the server is in permissive selinux mode with
getenfonce
and if that too doesn't work try giving 755 permission to the mounted directory here its /var/lib/nova
2014-06-24 18:58:20.642 5119 TRACE nova.compute.manager [instance: a7996f1f-9af2-4410-8351-139d43f00786] libvirtError: internal error Process exited while reading console log output: qemu-kvm: -chardev file,id=charserial0,path=/var/lib/nova/instances/a7996f1f-9af2-4410-8351-139d43f00786/console.log: Could not open '/var/lib/nova/instances/a7996f1f-9af2-4410-8351-139d43f00786/console.log': Permission denied
At last if nothing else worked , tell libvirtd/qemu to use root user to access datas.
[root@compute nova]# cat /etc/libvirt/qemu.conf |grep root
user = "root"
#group = "root"
[root@compute nova]#
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