<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content="text/html; charset=utf-8" http-equiv=Content-Type>
<STYLE>
BLOCKQUOTE {
MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; MARGIN-LEFT: 2em
}
OL {
MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px
}
UL {
MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px
}
P {
MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px
}
BODY {
LINE-HEIGHT: 1.5; FONT-FAMILY: 微软雅黑; COLOR: #000000; FONT-SIZE: 10.5pt; 36719: ; 38597: ; 40657:
}
</STYLE>
<META name=GENERATOR content="MSHTML 8.00.7601.17514"></HEAD>
<BODY style="MARGIN: 10px; FONT-FAMILY: verdana; FONT-SIZE: 10pt">
<DIV>On 2013-11-14 14:17 , <A href="mailto:gaofeng@cn.fujitsu.com">Gao
feng</A> wrote:</DIV>
<DIV>
<TABLE width="100%">
<TBODY>
<TR>
<TD width="100%">
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV>On 11/14/2013 01:52 PM, hzguanqiang@corp.netease.com wrote:</DIV>
<DIV>> On 2013-11-14 13:41 , Gao feng
<mailto:gaofeng@cn.fujitsu.com> wrote:</DIV>
<DIV>> </DIV>
<DIV>> On 11/14/2013 01:24 PM, Gao feng
wrote:</DIV>
<DIV>> > On 11/14/2013 10:59 AM,
hzguanqiang@corp.netease.com wrote:</DIV>
<DIV>> >> Hi experts,</DIV>
<DIV>> >> </DIV>
<DIV>> >> When I test
lxc-enter-namespace interface, it turned out such an error:</DIV>
<DIV>> >> </DIV>
<DIV>> >> hzguanqiang@debian:~$
<mailto:hzguanqiang@debian:~$> vir version</DIV>
<DIV>> >> Compiled against library:
libvirt 1.1.4</DIV>
<DIV>> >> Using library: libvirt
1.1.4</DIV>
<DIV>> >> Using API: LXC 1.1.4</DIV>
<DIV>> >> Running hypervisor: LXC
3.9.6</DIV>
<DIV>> >> </DIV>
<DIV>> >> hzguanqiang@debian:~$
<mailto:hzguanqiang@debian:~$> vir list</DIV>
<DIV>> >> Id
Name
State</DIV>
<DIV>> >>
----------------------------------------------------</DIV>
<DIV>> >> 1544
instance-00000015
running</DIV>
<DIV>> >> </DIV>
<DIV>> >> hzguanqiang@debian:~$
<mailto:hzguanqiang@debian:~$> vir lxc-enter-namespace 1544
--noseclabel /bin/df -hl</DIV>
<DIV>> >> error: Cannot get namespaces
for 1545: Function not implemented</DIV>
<DIV>> >> </DIV>
<DIV>> >> hzguanqiang@debian:~$
<mailto:hzguanqiang@debian:~$> ls /proc/self/ns</DIV>
<DIV>> >> ipc mnt net
pid user uts</DIV>
<DIV>> >> </DIV>
<DIV>> >> What's the problem?</DIV>
<DIV>> >> </DIV>
<DIV>> ></DIV>
<DIV>> > Does your system have system call
setns?</DIV>
<DIV>> </DIV>
<DIV>> grep setns /proc/kallsyms</DIV>
<DIV>> and</DIV>
<DIV>> grep setns the config.log of
libvirt.</DIV>
<DIV>> </DIV>
<DIV>> </DIV>
<DIV>> Hi, Gaofeng, thanks for your help. The info you want
are:</DIV>
<DIV>> </DIV>
<DIV> </DIV>
<DIV>Hi,</DIV>
<DIV> </DIV>
<DIV>> hzguanqiang@debian:~/github/libvirt$
<mailto:hzguanqiang@debian:~/github/libvirt$> sudo grep setns
/var/log/libvirt/libvirtd.log</DIV>
<DIV> </DIV>
<DIV>config.log not libvirtd.log, or you can exec "./configure | grep
setns" under libvirt source directory.</DIV>
<DIV> </DIV>
<DIV>> hzguanqiang@debian:~/github/libvirt$
<mailto:hzguanqiang@debian:~/github/libvirt$> grep setns
/proc/kallsyms</DIV>
<DIV>> ffffffff8105b993 T sys_setns</DIV>
<DIV>> </DIV>
<DIV>> What I found really strange is that the error info returned by
the command.</DIV>
<DIV>> hzguanqiang@debian:~$
<mailto:hzguanqiang@debian:~$> vir lxc-enter-namespace 1544
--noseclabel /bin/df -hl</DIV>
<DIV>> error: Cannot get namespaces for 1545:
Function not implemented</DIV>
<DIV>> The instance id is 1544, but the error info hint cannot get ns
for 1545.</DIV>
<DIV>> </DIV>
<DIV> </DIV>
<DIV>we have two libvirt lxc related process at the first start,</DIV>
<DIV>one is controller process on host(pid 1544), the other is the
container's init task(pid 1545).</DIV>
<DIV>since lxc-enter-namespace wants to exec cmd in container
environment. so</DIV>
<DIV>libvirt will try to get the namespaces of container's init
task.</DIV>
<DIV> </DIV>
<DIV>The problem is libvirt/autoconf thinks your system doesn't support
setns system call...</DIV>
<DIV> </DIV>
<DIV>> The libvirt code of mine is of version 1.1.4 from github (git
checkout v1.1.4 -b stable1.1.4 )</DIV>
<DIV>> </DIV>
<DIV> </DIV>
<DIV>I don't know if the libvirt git repo on github is the right thing,
but As I know</DIV>
<DIV>this repo git://libvirt.org/libvirt.git is official.</DIV>
<DIV> </DIV>
<DIV>Please have a try.</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>Thanks</DIV></BLOCKQUOTE></TD></TR></TBODY></TABLE></DIV>
<DIV> </DIV>
<DIV>Sorry, I made a mistake about the libvirt repo, the code I used is just
from the official repo.</DIV>
<DIV>Maybe it's problem of my kernel. I've tried to build libvirt from code of
master branch. The</DIV>
<DIV>mistake is just the same.</DIV>
<DIV> </DIV>
<DIV><SPAN>
<DIV style="FONT-FAMILY: verdana; FONT-SIZE: 10pt">
<DIV>------------------ <BR>Best
regards!<BR>GuanQiang</DIV></DIV></SPAN></DIV>
<DIV>14:52:30</DIV></BODY></HTML>