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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