[libvirt-users] Problem about lxc-enter-namespace interface
Gao feng
gaofeng at cn.fujitsu.com
Thu Nov 14 07:03:28 UTC 2013
On 11/14/2013 02:57 PM, hzguanqiang at corp.netease.com wrote:
> On 2013-11-14 14:17 , Gao feng <mailto:gaofeng at cn.fujitsu.com> wrote:
>
> On 11/14/2013 01:52 PM, hzguanqiang at corp.netease.com wrote:
> > On 2013-11-14 13:41 , Gao feng <mailto:gaofeng at cn.fujitsu.com> wrote:
> >
> > On 11/14/2013 01:24 PM, Gao feng wrote:
> > > On 11/14/2013 10:59 AM, hzguanqiang at corp.netease.com wrote:
> > >> Hi experts,
> > >>
> > >> When I test lxc-enter-namespace interface, it turned out such an error:
> > >>
> > >> hzguanqiang at debian:~$ <mailto:hzguanqiang at debian:~$> vir version
> > >> Compiled against library: libvirt 1.1.4
> > >> Using library: libvirt 1.1.4
> > >> Using API: LXC 1.1.4
> > >> Running hypervisor: LXC 3.9.6
> > >>
> > >> hzguanqiang at debian:~$ <mailto:hzguanqiang at debian:~$> vir list
> > >> Id Name State
> > >> ----------------------------------------------------
> > >> 1544 instance-00000015 running
> > >>
> > >> hzguanqiang at debian:~$ <mailto:hzguanqiang at debian:~$> vir lxc-enter-namespace 1544 --noseclabel /bin/df -hl
> > >> error: Cannot get namespaces for 1545: Function not implemented
> > >>
> > >> hzguanqiang at debian:~$ <mailto:hzguanqiang at debian:~$> ls /proc/self/ns
> > >> ipc mnt net pid user uts
> > >>
> > >> What's the problem?
> > >>
> > >
> > > Does your system have system call setns?
> >
> > grep setns /proc/kallsyms
> > and
> > grep setns the config.log of libvirt.
> >
> >
> > Hi, Gaofeng, thanks for your help. The info you want are:
> >
>
> Hi,
>
> > hzguanqiang at debian:~/github/libvirt$ <mailto:hzguanqiang at debian:~/github/libvirt$> sudo grep setns /var/log/libvirt/libvirtd.log
>
> config.log not libvirtd.log, or you can exec "./configure | grep setns" under libvirt source directory.
>
> > hzguanqiang at debian:~/github/libvirt$ <mailto:hzguanqiang at debian:~/github/libvirt$> grep setns /proc/kallsyms
> > ffffffff8105b993 T sys_setns
> >
> > What I found really strange is that the error info returned by the command.
> > hzguanqiang at debian:~$ <mailto:hzguanqiang at debian:~$> vir lxc-enter-namespace 1544 --noseclabel /bin/df -hl
> > error: Cannot get namespaces for 1545: Function not implemented
> > The instance id is 1544, but the error info hint cannot get ns for 1545.
> >
>
> we have two libvirt lxc related process at the first start,
> one is controller process on host(pid 1544), the other is the container's init task(pid 1545).
> since lxc-enter-namespace wants to exec cmd in container environment. so
> libvirt will try to get the namespaces of container's init task.
>
> The problem is libvirt/autoconf thinks your system doesn't support setns system call...
>
> > The libvirt code of mine is of version 1.1.4 from github (git checkout v1.1.4 -b stable1.1.4 )
> >
>
> I don't know if the libvirt git repo on github is the right thing, but As I know
> this repo git://libvirt.org/libvirt.git is official.
>
> Please have a try.
>
>
> Thanks
>
>
> Sorry, I made a mistake about the libvirt repo, the code I used is just from the official repo.
> Maybe it's problem of my kernel. I've tried to build libvirt from code of master branch. The
> mistake is just the same.
>
what's result of "./configure | grep setns"
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