[libvirt-users] How to retrieve legacy cgroups location ?
Jean-Pierre Ribeauville
jpribeauville at axway.com
Thu Oct 29 12:40:03 UTC 2015
Hi,
1) As I was totally unable to find it , I tried to reboot my server.
2) And then, I found all the stuff located there (included the three subdirs for the 3 Guests) :
ls /cgroup/cpu/libvirt/qemu
cgroup.event_control cgroup.procs cpu.cfs_period_us cpu.cfs_quota_us cpu.rt_period_us cpu.rt_runtime_us cpu.shares cpu.stat notify_on_release tasks VM_Orion-1 VM_Orion-2 VM_ORION-W2008R2-1
Thx.
J.P.
-----Message d'origine-----
De : Martin Kletzander [mailto:mkletzan at redhat.com]
Envoyé : jeudi 29 octobre 2015 11:54
À : Jean-Pierre Ribeauville
Cc : libvirt-users at redhat.com
Objet : Re: [libvirt-users] How to retrieve legacy cgroups location ?
On Thu, Oct 29, 2015 at 10:40:44AM +0000, Jean-Pierre Ribeauville wrote:
>Hi,
>
>As told in "Control Groups Resource Management" libvirt page :
>Legacy cgroups layout
>Prior to libvirt 1.0.5, the cgroups layout created by libvirt was
>different from that described above, and did not allow for
>administrator customization. Libvirt used a fixed, 3-level hierarchy
>libvirt/{qemu,lxc}/$VMNAME which was rooted at the point in the
>hierarchy where libvirtd itself was located. So if libvirtd was placed
>at /system/libvirtd.service by systemd, the groups for each virtual
>machine / container would be located at
>/system/libvirtd.service/libvirt/{qemu,lxc}/$VMNAME. In addition to
>this, the QEMU drivers further child groups for each vCPU thread and
>the emulator thread(s). This leads to a hierarchy that looked like
I just skimmed through the question, but wouldn't reading '/proc/$(pidof libvirtd)/cgroup' or cat /proc/$QEMU_PID/cgroup be enough?
>I'm trying to retrieve this layout :
>
>$ROOT
> |
> +- system
> |
> +- libvirtd.service
> |
> +- libvirt
> |
> +- qemu
> | |
> | +- vm1
> | | |
> | | +- emulator
> | | +- vcpu0
> | | +- vcpu1
> | |
> | +- vm2
> | | |
> | | +- emulator
> | | +- vcpu0
> | | +- vcpu1
> | |
> | +- vm3
> | |
> | +- emulator
> | +- vcpu0
> | +- vcpu1
>
>
>How may I find where systemd has placed libvirtd ?
>
>I use libvirt 0.10.2 on a RHEL6 2.6.32-431.el6.x86_64
>
>
>Thx for help.
>
>J.P. Ribeauville
>
>
>P: +33.(0).1.47.17.20.49
>.
>Puteaux 3 Etage 5 Bureau 4
>
>jpribeauville at axway.com<mailto:jpribeauville at axway.com>
>http://www.axway.com<http://www.axway.com/>
>
>
>
>P Pensez à l'environnement avant d'imprimer.
>
>
>
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