Comment 6 for bug 1524737

I'm seeing this problem while trying to launch an Instance on OpenStack Ocata on Ubuntu 16.04, here is the error message on nova-compute.log:

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2017-04-07 20:13:18.504 3996 ERROR nova.compute.manager [instance: fbbb7bde-763e-40d3-8987-fb3a6c568ad8] libvirtError: internal error: process exited while connecting to monitor: 2017-04-07T20:13:17.764939Z qemu-system-x86_64: -object memory-backend-file,id=ram-node0,prealloc=yes,mem-path=/dev/hugepages-1048576/libvirt/qemu,share=yes,size=4294967296,host-nodes=0,policy=bind: can't open backing store /dev/hugepages-1048576/libvirt/qemu for guest RAM: Permission denied
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At syslog:

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Apr 7 20:13:17 expert-jennet kernel: [ 1535.437956] audit: type=1400 audit(1491595997.759:23): apparmor="DENIED" operation="mknod" profile="libvirt-fbbb7bde-763e-40d3-8987-fb3a6c568ad8" name="/dev/hugepages-1048576/libvirt/qemu/qemu_back_mem._objects_ram-node0.BFNx2W" pid=8341 comm="qemu-system-x86" requested_mask="c" denied_mask="c" fsuid=64055 ouid=64055
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Any idea about how to fix it?