[Bug 512200] Re: LXC does not work with lucid host and lucid container

[sweetsinse]

Thomas Bechtold and friends, the lxc-ps command i think is buggy, and
the -n flag doesnt work, try using --name instead.  the output you are
seeing is NOT inside the container, it is the same as what you would see
if you simply typed ps.  if the process was running in a
container/cgroup you would see the container name next to the process,
like this:

cr at ph1 ~ $ lxc-ps --name guest-personal-tony
CONTAINER    PID TTY          TIME CMD
guest-personal-tony  4281 ?        00:00:01 init
guest-personal-tony  4318 ?        00:00:00 syslog-ng
guest-personal-tony  4319 ?        00:00:00 syslog-ng
guest-personal-tony  4370 ?        00:00:00 crond
guest-personal-tony  5768 pts/3    00:00:00 login
guest-personal-tony  5769 pts/3    00:00:00 bash
guest-personal-tony 25747 pts/3    00:00:00 su
guest-personal-tony 25748 pts/3    00:00:00 bash
guest-personal-tony 25851 pts/3    00:15:27 python
guest-personal-tony 31858 ?        00:00:00 dhcpcd
guest-personal-tony 32503 ?        00:00:00 git-daemon

another way of seeing the processes is to look at the cgroup itself:

cr at ph1 ~ $ cat /vps/var/cgroup/guest-personal-tony/tasks
<you will see a list of pids running within this cgroup>

cgroup is a psuedo filesystem, and everything you can do with
containers/LXC can be managed by manipulating/echoing values into the
files within a mounted cgroup.  if you create a folder in a cgroup, you
effectively begin a hierarchy of groups/aggregated processes, each with
their own limits; notice that once you make a folder in a mounted
cgroup, all the device files automagically appear inside it, ready to be
manipulated.  each process on the system must belong to one and only one
node in the hierarchy.  read this for a better understanding:

http://www.mjmwired.net/kernel/Documentation/cgroups.txt

to use lxc-console, you must enable tty's inside the container with this
configuration option:

lxc.tty = N

where N is the number of tty's you want the container to have.  lxc-*
tools will connect a pty in the host to a tty in the container.  the
container is responsible for runny a getty or some kind of handler on
the tty.  if you enable 3 tty's, you can lxc-console into the container
3 independent times.  i use an autologin binary and some agetty options
to autologin as root anyone entering from the host.

-- 
LXC does not work with lucid host and lucid container
https://bugs.launchpad.net/bugs/512200
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.

-- 
ubuntu-bugs mailing list
ubuntu-bugs at lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs