[doc] ammend ivshmem_kvmfr to make cgroups and permissions clearer

This commit is contained in:
Geoffrey McRae 2024-03-08 23:31:32 +11:00
parent cae410d4de
commit 778c21070c

View File

@ -105,6 +105,11 @@ dmesg:
You should now also have the character device ``/dev/kvmfr0``
.. code:: bash
$ ls -l /dev/kvmfr0
crw------- 1 root root 242, 0 Mar 5 05:53 /dev/kvmfr0
.. warning::
If you start the VM prior to loading the module, QEMU will create the file
@ -184,19 +189,32 @@ legacy syntax for IVSHMEM setup:
Running libvirt this way violates AppArmor and cgroups policies, which will
block the VM from running. These policies must be amended to allow the VM
to start:
to start.
- For AppArmor, create ``/etc/apparmor.d/local/abstractions/libvirt-qemu`` if
it doesn't exist, and add the following::
.. tip::
# Looking Glass
/dev/kvmfr0 rw,
If you are not sure, you likely have cgroups also as this is usually deployed
and configured by default by most distributions when you install libvirt.
- For cgroups, edit ``/etc/libvirt/qemu.conf``, uncomment the
``cgroup_device_acl`` block, and add ``/dev/kvmfr0`` to the list.
Then restart ``libvirtd``:
AppArmor
""""""""
.. code:: bash
Create ``/etc/apparmor.d/local/abstractions/libvirt-qemu`` if it doesn't exist
and add the following:
.. code:: text
# Looking Glass
/dev/kvmfr0 rw,
cgroups
"""""""
Edit the file ``/etc/libvirt/qemu.conf`` and uncomment the ``cgroup_device_acl``
block, adding ``/dev/kvmfr0`` to the list. To make this change active you then
must restart ``libvirtd``
.. code:: bash
sudo systemctl restart libvirtd.service