Hi,
I tried to run libvirt-1.0.2 with LXC as below, but it failed to mount cgroup.
1). mount /cgroup
# mkdir /cgroup
# mount -t cgroup cgroup /cgroup
# vi vm1.xml
<domain type='lxc'>
<name>vm1</name>
<memory>32768</memory>
<os>
<type>exe</type>
<init>/bin/sh</init>
</os>
<vcpu>1</vcpu>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/libexec/libvirt_lxc</emulator>
<console type='pty' tty='/dev/pts/3'>
<source path='/dev/pts/3'/>
<target port='0'/>
</console>
</devices>
</domain>
# virsh -c lxc:/// define vm1.xml
# virsh -c lxc:/// start vm1
error: Failed to start domain vm1
error: internal error guest failed to start: 2013-03-05 02:13:03.639+0000: 2403: info : libvirt version: 1.0.2
2013-03-05 02:13:03.639+0000: 2403: warning : lxcCapsInit:73 : Failed to get host power management capabilities
PATH=/bin:/sbin TERM=linux container=lxc-libvirt container_uuid=d50aec75-4566-62b3-ed81-adf3e8705efe LIBVIRT_LXC_UUID=d50aec75-4566-62b3-ed81-adf3e8705efe LIBVIRT_LXC_NAME=vm1 /bin/sh
2013-03-05 02:13:03.779+0000: 1: error : lxcContainerIdentifyCGroups:1775 : Unable to read directory : No such file or directory
2013-03-05 02:13:03.779+0000: 2404: error : virLXCControllerRun:1468 : error receiving signal from container: Input/output error
# ps aux | grep libvirtd
root 2314 0.1 0.4 108320 4876 ? Sl 02:47 0:00 libvirtd -d
root 2383 0.0 0.0 4116 452 ttyS0 S+ 02:52 0:00 grep libvirtd
# cat /proc/2314/status
Name: libvirtd
State: S (sleeping)
Tgid: 2314
Pid: 2314
PPid: 1
TracerPid: 0
Uid: 0 0 0 0
Gid: 0 0 0 0
FDSize: 32
Groups: 0
VmPeak: 112420 kB
VmSize: 108320 kB
VmLck: 0 kB
VmHWM: 4884 kB
VmRSS: 4876 kB
VmData: 91540 kB
VmStk: 136 kB
VmExe: 348 kB
VmLib: 13092 kB
VmPTE: 96 kB
VmSwap: 0 kB
Threads: 11
SigQ: 0/7760
SigPnd: 0000000000000000
ShdPnd: 0000000000000000
SigBlk: 0000000000000000
SigIgn: 0000000000001000
SigCgt: 0000000180004cef
CapInh: 0000000000000000
CapPrm: ffffffffffffffff
CapEff: ffffffffffffffff
CapBnd: ffffffffffffffff
Cpus_allowed: 3
Cpus_allowed_list: 0-1
Mems_allowed: 1
Mems_allowed_list: 0
voluntary_ctxt_switches: 59
nonvoluntary_ctxt_switches: 24
# cat /proc/2314/cgroup
1:freezer,devices,memory,cpuacct,cpuset:/
# mount | grep cgroup
cgroup on /cgroup type cgroup (rw,relatime,freezer,devices,memory,cpuacct,cpuset)
# vi /var/log/libvirt/lxc/vm1.log
2013-03-05 02:48:39.218+0000: starting up
PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin LIBVIRT_DEBUG=3 LIBVIRT_LOG_OUTPUTS=3:stderr /usr/libexec/libvirt_lxc --name vm1 --console 17 --security=none --handshake 20 --background
2013-03-05 02:48:39.229+0000: 2365: info : libvirt version: 1.0.2
2013-03-05 02:48:39.229+0000: 2365: warning : lxcCapsInit:73 : Failed to get host power management capabilities
PATH=/bin:/sbin TERM=linux container=lxc-libvirt container_uuid=523492fb-36c8-3662-c61e-91697d5ad0ab LIBVIRT_LXC_UUID=523492fb-36c8-3662-c61e-91697d5ad0ab LIBVIRT_LXC_NAME=vm1 /bin/sh
2013-03-05 02:48:39.299+0000: 1: error : lxcContainerIdentifyCGroups:1775 : Unable to read directory : No such file or directory
2013-03-05 02:48:39.300+0000: 2366: error : virLXCControllerRun:1468 : error receiving signal from container: Input/output error
But if mount cgroup on another poinit, the error message is different.
2). mount /dev/cgroups
# mkdir /dev/cgroups
# mount -t cgroup cgroup /dev/cgroups
# virsh -c lxc:/// start vm1
# vi /var/log/libvirt/lxc/vm1.log
2013-03-05 03:15:49.660+0000: starting up
PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin LIBVIRT_DEBUG=3 LIBVIRT_LOG_OUTPUTS=3:stderr /usr/libexec/libvirt_lxc --name vm1 --console
2013-03-05 03:15:49.666+0000: 2430: info : libvirt version: 1.0.2
2013-03-05 03:15:49.666+0000: 2430: warning : lxcCapsInit:73 : Failed to get host power management capabilities
PATH=/bin:/sbin TERM=linux container=lxc-libvirt container_uuid=518d6735-42d5-90b0-3780-d41a651385fc LIBVIRT_LXC_UUID=518d6735-42d5-90b0-3780-d41a651385fc LI
2013-03-05 03:15:49.749+0000: 1: error : lxcContainerMountCGroups:1892 : Failed to mount cgroup on '/dev/cgroups': No such file or directory
2013-03-05 03:15:49.749+0000: 2431: error : virLXCControllerRun:1468 : error receiving signal from container: Input/output error
Best Regards,
Olivia
--
libvir-list mailing list
libvir-list@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/libvir-list