Hello, For non root user, I check for /dev/lxc/console
[grid@ol6 ~]$ [ -c /dev/lxc/console ] && echo "inside lxc container" inside lxc container Alvaro. On Thu, Dec 26, 2013 at 9:52 AM, Stéphane Graber <[email protected]>wrote: > On Wed, Dec 25, 2013 at 10:44:21PM +0200, David Shwatrz wrote: > > Hello, lxc users, > > > > Is there a way for a user who is inside some shell in a container > > to know that he is inside a container? I am not talking about setting > > specific different host names to containers, but the question is: is > > there something general/inherent to containers, which indicates that > > a user is inside a container ? > > > > Best, > > DavidS > > Yes, there are a few ways to do so. > > If on Ubuntu, the easiest way is to call "running-in-container" which > will return 0 if you are and 1 if you're not. > On Ubuntu you can then read /run/container_type to know what technology > is used (we detect lxc, libvirt-lxc, openvz and vserver). > > If not on Ubuntu, you can basically use the same trick we use on Ubuntu > to detect containers which is roughly: > > cat /proc/1/environ | tr '\0' '\n' | grep ^container > > Which wiill return "container=lxc" in a LXC container. For other > container types we need a few more tricks, here are the ones we > currently use: > > # Detect old-style libvirt > if [ -z "$container" ]; then > [ -n "$LIBVIRT_LXC_UUID" ] && container=lxc-libvirt > fi > > # Detect OpenVZ containers > if [ -z "$container" ]; then > [ -d /proc/vz ] && [ ! -d /proc/bc ] && container=openvz > fi > > # Detect vserver > if [ -z "$container" ]; then > VXID="$(cat /proc/self/status | grep ^VxID | cut -f2)" || true > [ "${VXID:-0}" -gt 1 ] && container=vserver > fi > > > Between the container env variable and those, you should be able to > detect pretty much all kind of containers (unless they are tweaked to > hide those information from you). > > -- > Stéphane Graber > Ubuntu developer > http://www.ubuntu.com > > _______________________________________________ > lxc-users mailing list > [email protected] > http://lists.linuxcontainers.org/listinfo/lxc-users >
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