qemu-kvm fails with "Permission denied" when trying to open console.log

[Jaroslav Henner]

in the libvirt log:
qemu-kvm: -drive file=/var/lib/nova/instances/a2f907b5-6fe2-402a-86fe-81c44058a929/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none: could not open disk image /var/lib/nova/instances/a2f907b5-6fe2-402a-86fe-81c44058a929/disk: Could not open file: Permission denied

The file is created with this permissions:
-rw-rw----. 1 nova nova 0 4. čec 04.58 /var/lib/nova/instances/a2f907b5-6fe2-402a-86fe-81c44058a929/console.log

# id qemu
uid=107(qemu) gid=107(qemu) groups=107(qemu),36(kvm)

openstack-nova-compute-2014.1-7.el7ost.noarch

[Jaroslav Henner (jhenner)]

There are lines like:

2014-07-04 04:41:03.685 5272 TRACE nova.compute.manager [instance: 1dbcc37a-828f-4285-843c-c3b3f51d6554] qemu-kvm: -chardev file,id=charserial0,path=/var/lib/nova/instances/1dbcc37a-828f-4285-843c-c3b3f51d6554/console.log: Could not open '/var/lib/nova/instances/1dbcc37a-828f-4285-843c-c3b3f51d6554/console.log': Permission denied

after I have manually added the permissions to the console.log `chmod a+rw ...`, there started to appear lines like:

2014-07-04 05:00:30.033 5272 TRACE nova.compute.manager [instance: a2f907b5-6fe2-402a-86fe-81c44058a929] qemu-kvm: -drive file=/var/lib/nova/instances/a2f907b5-6fe2-402a-86fe-81c44058a929/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none: could not open disk image /var/lib/nova/instances/a2f907b5-6fe2-402a-86fe-81c44058a929/disk: Could not open file: Permission denied

[Thang Pham (thang-pham)]

I believe it is the entire instance directory that may need to change permissions. What is the original permissions on /var/lib/nova/instances/? What happens when you try to create another instance?

[Sean Dague (sdague)]

I expect this is a downstream packaging issue on directory permisions