Unprivileged containers can safely mount /sys as read-write. This also allows
systemd-udevd to be started in unprivileged containers.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
* rename lxc.haltsignal to lxc.signal.halt
* rename lxc.rebootsignal to lxc.signal.reboot
* rename lxc.stopsignal to lxc.signal.stop
the legacy keys will be kept around until LXC 3.0 and then will be
removed.
Signed-off-by: 0x0916 <w@laoqinren.net>
The code in conf will bind-mount a /dev/pts/<n> device over a dummy regular
/dev/console file. If users really want /dev/console bind-mount from the host
they can request it explicitly in the containers config file. This change will
have no effect on current LX{C,D} behavior since we (as said above) overmount
the /dev/console bind-mount anyway.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
gentoo.moresecure.conf tries to drop the capability CAP_SYS_RESOURCES.
However, that capability doesn't exist, so the container doesn't start.
Change it to CAP_SYS_RESOURCE, according to capabilities(7).
Also correct the same typo in a comment in slackware.common.conf.
Signed-off-by: Karl-Johan Karlsson <creideiki@ferretporn.se>
Prevent privileged containers from messing with the host's pci devices
directly. Refuse access under /proc/bus, and drop cap_sys_rawio. Some
containers may need to re-enable cap_sys_rawio (i.e. if they run an
X server).
It may be desirable to break some of this stuff into files which can be
separately included (or not included), but this patch isn't the right
place for that.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
New template script is more readable and robust, uses cache and external
LXC config file as other templates.
Signed-off-by: Jakub Jirutka <jakub@jirutka.cz>
Linux for SPARC is a free community Linux distribution for SPARC hosted by Oracle. See : https://oss.oracle.com/projects/linux-sparc
While the distribution is based on Oracle Linux it does have some differences and since it's not actually Oracle Linux I decided to add a separate template rather than having the Oracle Linux template also support Linux for SPARC.
This patch adds the lxc-template for Linux for SPARC and it also adds Linux for SPARC in the configure.ac as a distribution target to build.
Signed-off-by: Wim Coekaerts <wim.coekaerts@oracle.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
systemd wants it. It doesn't seem to be a big deal, but it's
one fewer error msg.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
Newer kernels have added a new restriction: if /proc or /sys on the
host has files or non-empty directories which are over-mounted, and
there is no /proc which fully visible, then it assumes there is a
"security" reason for this. It prevents anyone in a non-initial user
namespace from creating a new proc or sysfs mount.
To work around this, this patch adds a new 'nesting.conf' which can be
lxc.include'd from a container configuration file. It adds a
non-overmounted mount of /proc and /sys under /dev/.lxc, so that the
kernel can see that we're not trying to *hide* things like /proc/uptime.
and /sys/devices/virtual/net. If the host adds this to the config file
for container w1, then container w1 will support unprivileged child
containers.
The nesting.conf file also sets the apparmor profile to the with-nesting
variant, since that is required anyway. This actually means that
supporting nesting isn't really more work than it used to be, just
different. Instead of adding
lxc.aa_profile = lxc-container-default-with-nesting
you now just need to
lxc.include = /usr/share/lxc/config/nesting.conf
(Look, fewer characters :)
Finally, in order to maintain the current apparmor protections on
proc and sys, we make /dev/.lxc/{proc,sys} non-read/writeable.
We don't need to be able to use them, we're just showing the
kernel what's what.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
Documents setpcap,sys_admin,sys_resources as breaking systemd, but does not drop them from lxc.cap.drop, as the default init system on Gentoo is OpenRC, thus stuff breaking systemd can be blocked anyway.
This also drops setpcap and sys_nice caps, as these are also dropped in other non-systemd distros.
Most of the explanatory blurb was copied from other distros' configs.
See-Also: https://bugs.gentoo.org/show_bug.cgi?id=551792
Signed-Off-By: Dennis Schridde <devurandom@gmx.net>
The dev/mqueue and dev/shm directories do not exist when using lxc.autodev, thus they have to be created upon mount.
Signed-off-by: Dennis Schridde <devurandom@gmx.net>
This enables containers to mount fuse filesystems per default. The mount
is designed to be safe. Hence, it can be enabled per default in
common.conf. It will lead to a cleaner boot for some unprivileged
systemd-based containers.
Signed-off-by: Christian Brauner <christianvanbrauner@gmail.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
lxc-plamo stop:
* creating objects under /dev when creating the container
* removing /dev population process from original rc script
now populate /dev at container boot time, and allow to enable
lxc.autodev=1
Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
- Implements mixed mode for /sys where it's mounted read-only but with
/sys/devices/virtual/net/ writable.
- Sets lxc.mount.auto to "cgroup:mixed proc:mixed sys:mixed" for all
templates.
- Drop any template-specific mount for /proc, /sys or /sys/fs/cgroup.
- Get rid of the fstab file by default, using lxc.mount.entry instead.
- Set sys:mixed as the default for "sys". sys:mixed is slightly more
permissive than sys:ro so this shouldn't be a problem.
The read-only bind mount of /sys on top of itself is there so that
mountall and other init systems don't attempt to remount /sys
read-write.
v2 changes:
- Fix the mount list, don't specify a source for the remount.
- Update the documentation.
Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
It is set in plamo.common.conf, so it do not need in plamo.userns.conf
Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
At this time, a container that is created by lxc-plamo can't work with
lxc.autodev=1
Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
It's now been proven over and over again that the symlink from /dev/kmsg
to /dev/console is harmful for everything but upstart systems. As Ubuntu
is now switching over to systemd too, lets switch the default.
Upstart users wishing to see boot messages can always set lxc.kmsg = 1
manually in their config (so long as they don't expect to then
dist-upgrade the container to systemd succesfuly).
Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
Now that autodev works fine with unprivileged containers and shouldn't
come with any side effect, lets turn it on by default.
Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
In contrast to what the comment above the line disabling it said,
it seems to work just fine. It also is needed on current kernels
(until Eric's patch hits upstream) to prevent unprivileged containers
from hosing fuse filesystems they inherit.
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
