The permissions set by libvirtd on new LVM volumes do not allow non-root access.

Issue

• How can I set permissions for new LVM volumes created with libvirt? Is this in udev, libvirt, lvm?

• There is a requirement to be able to provide non-root users with access to volumes created by 'virt-manager'. An example of this type of access would be via the 'virt-copy-out' command.

  If a new volume is created in an LVM pool via the 'virt-manager', the '/dev/dm' device files will have permissions set to 600;

  ls -l /dev | grep dm
  brw-------  1 hjenkins qemu    253,   9 Sep 26 18:00 dm-9
  brw-------  1 hjenkins qemu    253,  10 Sep 26 18:00 dm-10
  brw-------  1 hjenkins qemu    253,  11 Sep 26 18:00 dm-11
  

  This does not allow any non-root user to access these volumes.

  Even if the /lib/udev/rules.d/12-dm-permissions.rules udev rules file is used and a rule is specified to modify the permissions, the permissions will remain set to 600.