On 07/13/2011 03:18 PM, adeadhat wrote:
> My host system is Ubuntu 11.04
>
> root@ubuntu1:~# lxc-monitor -n deb1
> 'deb1' changed state to [STARTING]
> 'deb1' changed state to [RUNNING]
>
> root@ubuntu1:~# lxc-console -n deb1
>
> Type<Ctrl+a q> to exit the console
>
>
>
> loginsdfsdfsdf^C^C^C
>
>
> ^ Here the virtual console is unresponsive. Here is the strace output
> from my lx-console session:
>
> setsockopt(15, SOL_SOCKET, SO_PASSCRED, [1], 4) = 0
> epoll_ctl(13, EPOLL_CTL_ADD, 15, {EPOLLIN, {u32=139381800,
> u64=139381800}}) = 0
> epoll_wait(13, {{EPOLLIN, {u32=139381800, u64=139381800}}}, 10, -1) = 1
> recvmsg(15, {msg_name(0)=NULL, msg_iov(1)=[{"\0\0\0\0\377\377\377\377",
> 8}], msg_controllen=24, {cmsg_len=24, cmsg_level=SOL_SOCKET,
> cmsg_type=SCM_CREDENTIALS{pid=30535, uid=0, gid=0}}, msg_flags=0}, 0) = 8
> sendmsg(15, {msg_name(0)=NULL, msg_iov(1)=[{"\1\0\0\0", 4}],
> msg_controllen=16, {cmsg_len=16, cmsg_level=SOL_SOCKET,
> cmsg_type=SCM_RIGHTS, {4}}, msg_flags=0}, 0) = 4
> epoll_wait(13,
>
>
> When I lxc-console strace shows the process is opening a socket.
>
> recvmsg(15, {msg_name(0)=NULL, msg_iov(1)=[{"\0\0\0\0\377\377\377\377",
> 8}], msg_controllen=24, {cmsg_len=24, cmsg_level=SOL_SOCKET,
> cmsg_type=SCM_CREDENTIALS{pid=30645, uid=0, gid=0}}, msg_flags=0}, 0) = 8
> sendmsg(15, {msg_name(0)=NULL, msg_iov(1)=[{"\1\0\0\0", 4}],
> msg_controllen=16, {cmsg_len=16, cmsg_level=SOL_SOCKET,
> cmsg_type=SCM_RIGHTS, {4}}, msg_flags=0}, 0) = 4
> epoll_wait(13, {{EPOLLIN|EPOLLHUP, {u32=139381800,
> u64=13222343338143697960}}}, 10, -1) = 1
> recvmsg(15, {msg_name(0)=NULL, msg_iov(1)=[{"\0\0\0\0\377\377\377\377",
> 8}], msg_controllen=24, {cmsg_len=24, cmsg_level=SOL_SOCKET,
> cmsg_type=SCM_CREDENTIALS{pid=0, uid=0, gid=0}}, msg_flags=0}, 0) = 0
> epoll_ctl(13, EPOLL_CTL_DEL, 15, NULL) = 0
>
> However any data I type and enter in, the process does nothing. Upon
> issuing a CtrlA+q strace shoes the process performs a close():
>
> epoll_ctl(13, EPOLL_CTL_DEL, 15, NULL) = 0
> close(15) = 0
>
> So it looks like the problem is a strange one. Here is some helpful
> information.
>
> root@ubuntu1:~# cat /etc/fstab | grep -i cgroup
> cgroup /dev/cgroup cgroup cpuacct,memory,devices,cpu,freezer,blkio 0 0
>
> I'm using the lxc-debian scripts contained here:
> git://git.nigel.mcnie.name/git/lxc-debian.git
>
> Overall just odd behavior - it also aborts startup if lxc-monitor isn't
> running.
>
>
>
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>
Just as a followup here is the config files for the container:
config:
lxc.utsname = deb1
lxc.tty = 4
lxc.pts = 1024
lxc.network.type = veth
lxc.network.flags = up
lxc.network.link = br0
lxc.network.name = eth0
lxc.network.mtu = 1500
lxc.mount = fstab
lxc.cgroup.devices.deny = a
# /dev/null and zero
lxc.cgroup.devices.allow = c 1:3 rwm
lxc.cgroup.devices.allow = c 1:5 rwm
# consoles
lxc.cgroup.devices.allow = c 5:1 rwm
lxc.cgroup.devices.allow = c 5:0 rwm
lxc.cgroup.devices.allow = c 4:0 rwm
lxc.cgroup.devices.allow = c 4:1 rwm
# /dev/{,u}random
lxc.cgroup.devices.allow = c 1:9 rwm
lxc.cgroup.devices.allow = c 1:8 rwm
lxc.cgroup.devices.allow = c 136:* rwm
lxc.cgroup.devices.allow = c 5:2 rwm
# rtc
lxc.cgroup.devices.allow = c 254:0 rwm
A log from startup:
root@ubuntu1:/var/lib/lxc/deb1# cat damn.log
lxc-start 1310587249.574 ERROR lxc_cgroup - Device or resource
busy - failed to remove previous cgroup '/dev/cgroup/deb1'
lxc-start 1310587249.661 ERROR lxc_start - failed to spawn 'deb1'
lxc-start 1310587249.662 ERROR lxc_cgroup - Device or resource
busy - failed to remove cgroup '/dev/cgroup/deb1'
------------------------------------------------------------------------------
AppSumo Presents a FREE Video for the SourceForge Community by Eric
Ries, the creator of the Lean Startup Methodology on "Lean Startup
Secrets Revealed." This video shows you how to validate your ideas,
optimize your ideas and identify your business strategy.
http://p.sf.net/sfu/appsumosfdev2dev
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