Karel Hendrych
2015-Sep-06 07:08 UTC
[CentOS-virt] libvirt, xen PV, qemu-system-i386, root user
Hi, after migrating to libvirt/libxl according to: https://wiki.centos.org/HowTos/Xen/Xen4QuickStart/Xen4Libvirt I've noticed that my Xen PV domains are being launched by qemu-system-i386 running under root privileges. I am wondering why is this? Previously no qemu process was used. If qemu is needed for some reason, are there any guidelines for non-root operation? Thanks -- Karel Hendrych
Pasi Kärkkäinen
2015-Sep-06 10:56 UTC
[CentOS-virt] libvirt, xen PV, qemu-system-i386, root user
On Sun, Sep 06, 2015 at 09:08:50AM +0200, Karel Hendrych wrote:> Hi, after migrating to libvirt/libxl according to: >Hi,> https://wiki.centos.org/HowTos/Xen/Xen4QuickStart/Xen4Libvirt > > I've noticed that my Xen PV domains are being launched by > qemu-system-i386 running under root privileges. > > I am wondering why is this? Previously no qemu process was used. > > If qemu is needed for some reason, are there any guidelines for > non-root operation? >In general qemu is used for the following purposes: - for certain domU disk backend types (image files), and/or if there's no blktap driver in dom0 kernel. - domU graphical console (PVFB) VNC server, if it's enabled for the domU.> -- > Karel Hendrych-- Pasi
Karel Hendrych
2015-Sep-07 15:42 UTC
[CentOS-virt] libvirt, xen PV, qemu-system-i386, root user
Hi, spot on! On 6.9.2015 12:56, Pasi K?rkk?inen wrote:> On Sun, Sep 06, 2015 at 09:08:50AM +0200, Karel Hendrych wrote: >> Hi, after migrating to libvirt/libxl according to: >> > > Hi, > >> https://wiki.centos.org/HowTos/Xen/Xen4QuickStart/Xen4Libvirt >> >> I've noticed that my Xen PV domains are being launched by >> qemu-system-i386 running under root privileges. >> >> I am wondering why is this? Previously no qemu process was used. >> >> If qemu is needed for some reason, are there any guidelines for >> non-root operation? >> > > In general qemu is used for the following purposes: > > - for certain domU disk backend types (image files), and/or if there's no blktap driver in dom0 kernel. > - domU graphical console (PVFB) VNC server, if it's enabled for the domU. > > >> -- >> Karel Hendrych > > > -- Pasi > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > https://lists.centos.org/mailman/listinfo/centos-virt >