Jean-Pierre Ribeauville
2015-Oct-29 10:40 UTC
[libvirt-users] How to retrieve legacy cgroups location ?
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'm trying to retrieve this layout :
$ROOT
|
+- system
|
+- libvirtd.service
|
+- libvirt
|
+- qemu
| |
| +- vm1
| | |
| | +- emulator
| | +- vcpu0
| | +- vcpu1
| |
| +- vm2
| | |
| | +- emulator
| | +- vcpu0
| | +- vcpu1
| |
| +- vm3
| |
| +- emulator
| +- vcpu0
| +- vcpu1
How may I find where systemd has placed libvirtd ?
I use libvirt 0.10.2 on a RHEL6 2.6.32-431.el6.x86_64
Thx for help.
J.P. Ribeauville
P: +33.(0).1.47.17.20.49
.
Puteaux 3 Etage 5 Bureau 4
jpribeauville@axway.com<mailto:jpribeauville@axway.com>
http://www.axway.com<http://www.axway.com/>
P Pensez à l'environnement avant d'imprimer.
Martin Kletzander
2015-Oct-29 10:53 UTC
Re: [libvirt-users] How to retrieve legacy cgroups location ?
On Thu, Oct 29, 2015 at 10:40:44AM +0000, Jean-Pierre Ribeauville wrote:>Hi, > >As told in "Control Groups Resource Management" libvirt page : >Legacy cgroups layout >Prior to libvirt 1.0.5, the cgroups layout created by libvirt was different from that described above, and did not allow for administrator customization. Libvirt used a fixed, 3-level hierarchy libvirt/{qemu,lxc}/$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}/$VMNAME. In addition to this, the QEMU drivers further child groups for each vCPU thread and the emulator thread(s). This leads to a hierarchy that looked likeI just skimmed through the question, but wouldn't reading '/proc/$(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@axway.com<mailto:jpribeauville@axway.com> >http://www.axway.com<http://www.axway.com/> > > > >P Pensez à l'environnement avant d'imprimer. > > >>_______________________________________________ >libvirt-users mailing list >libvirt-users@redhat.com >https://www.redhat.com/mailman/listinfo/libvirt-users
Jean-Pierre Ribeauville
2015-Oct-29 12:40 UTC
Re: [libvirt-users] How to retrieve legacy cgroups location ?
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@redhat.com] Envoyé : jeudi 29 octobre 2015 11:54 À : Jean-Pierre Ribeauville Cc : libvirt-users@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 likeI 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@axway.com<mailto:jpribeauville@axway.com> >http://www.axway.com<http://www.axway.com/> > > > >P Pensez à l'environnement avant d'imprimer. > > >>_______________________________________________ >libvirt-users mailing list >libvirt-users@redhat.com >https://www.redhat.com/mailman/listinfo/libvirt-users