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With the apparmor security driver enabled, qemu instances fail to start # grep ^security_driver /etc/libvirt/qemu.conf security_driver = "apparmor" # virsh start test-kvm error: Failed to start domain test-kvm error: internal error security label already defined for VM The model field of virSecurityLabelDef object is always populated by virDomainDefGetSecurityLabelDef(), so remove the check for a NULL model when verifying if a label is already defined for the instance. Checking for a NULL model and populating it later in AppArmorGenSecurityLabel() has been left in the code to be consistent with virSecuritySELinuxGenSecurityLabel().
LibVirt : simple API for virtualization Libvirt is a C toolkit to interact with the virtualization capabilities of recent versions of Linux (and other OSes). It is free software available under the GNU Lesser General Public License. Virtualization of the Linux Operating System means the ability to run multiple instances of Operating Systems concurrently on a single hardware system where the basic resources are driven by a Linux instance. The library aim at providing long term stable C API initially for the Xen paravirtualization but should be able to integrate other virtualization mechanisms if needed. Daniel Veillard <veillard@redhat.com>
Description
Libvirt provides a portable, long term stable C API for managing the
virtualization technologies provided by many operating systems. It
includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware
vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER
Hypervisor.
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