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71 Commits

Author SHA1 Message Date
Michael Crosby
39037a91f8 Send sigterm to child instead of sigkill 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-03-14 15:42:05 -07:00
Michael Crosby
28994f86ee Merge pull request #4656 from crosbymichael/fix-ptmx-link 
Always symlink /dev/ptmx for libcontainer
 2014-03-13 14:57:17 -07:00
Michael Crosby
747275d30c Always symlink /dev/ptmx for libcontainer 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-03-13 14:31:09 -07:00
Alexander Larsson
6c266c4b42 Move all bind-mounts in the container inside the namespace 
This moves the bind mounts like /.dockerinit, /etc/hostname, volumes,
etc into the container namespace, by setting them up using lxc.

This is useful to avoid littering the global namespace with a lot of
mounts that are internal to each container and are not generally
needed on the outside. In particular, it seems that having a lot of
mounts is problematic wrt scaling to a lot of containers on systems
where the root filesystem is mounted --rshared.

Note that the "private" option is only supported by the native driver, as
lxc doesn't support setting this. This is not a huge problem, but it does
mean that some mounts are unnecessarily shared inside the container if you're
using the lxc driver.

Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson)
 2014-03-13 20:01:29 +01:00
srid
03211ecce0 nsinit: prefix errors with their source 
Docker-DCO-1.1-Signed-off-by: Sridhar Ratnakumar <github@srid.name> (github: srid)
 2014-03-10 17:08:50 -07:00
Michael Crosby
36dd124b16 Add env var to toggle pivot root or ms_move 
Use the  DOCKER_RAMDISK env var to tell the native driver not to use
a pivot root when setting up the rootfs of a container.
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-03-06 19:30:52 -08:00
Michael Crosby
c38635020a Revert "Revert "libcontainer: Use pivot_root instead of chroot"" 
This reverts commit 82f797f140.

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-03-06 17:19:59 -08:00
Michael Crosby
557e4fef44 Revert "Revert "libcontainer: Use MS_PRIVATE instead of MS_SLAVE"" 
This reverts commit bd263f5b15.

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-03-06 17:19:47 -08:00
unclejack
78dc1ede52 Merge pull request #4512 from crosbymichael/no-pivot-root 
No pivot root because of ramdisk
 2014-03-07 02:54:03 +02:00
Michael Crosby
bd263f5b15 Revert "libcontainer: Use MS_PRIVATE instead of MS_SLAVE" 
This reverts commit 757b577572.

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-03-06 16:41:03 -08:00
Michael Crosby
82f797f140 Revert "libcontainer: Use pivot_root instead of chroot" 
This reverts commit 5b5c884cc8.

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-03-06 16:32:06 -08:00
Michael Crosby
ea9bce8724 Ensure that native containers die with the parent 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-03-06 16:30:56 -08:00
Michael Crosby
772ef99d28 Remove the ghosts and kill everything 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-03-06 15:30:26 -08:00
Guillaume J. Charmes
f0f833c6d7 Use CGO for apparmor profile switch 
Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume.charmes@docker.com> (github: creack)
 2014-03-06 11:10:58 -08:00
Alexander Larsson
5c9b28db18 libcontainer: Don't use UsetCloseOnExec, it is racy 
We can't keep file descriptors without close-on-exec except with
syscall.ForkLock held, as otherwise they could leak by accident into
other children from forks in other threads.

Instead we just use Cmd.ExtraFiles which handles all this for us.

This fixes https://github.com/dotcloud/docker/issues/4493

Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson)
 2014-03-06 14:10:32 +01:00
Michael Crosby
37f137c822 Some cleanup around logs 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-03-05 13:50:49 -08:00
Guillaume J. Charmes
cb4189a292 Add AppArmor support to native driver + change pipe/dup logic 
Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume.charmes@docker.com> (github: creack)
 2014-03-05 13:08:24 -08:00
Alexander Larsson
757b577572 libcontainer: Use MS_PRIVATE instead of MS_SLAVE 
Now that we unmount all the mounts from the global namespace we can
use a private namespace rather than a slave one (as we have no need
for unmounts of inherited global mounts to propagate into the
container).

Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson)
 2014-03-05 09:40:54 +01:00
Michael Crosby
b07708c8de Add shm size cap to mount 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-03-04 14:18:40 -08:00
Guillaume J. Charmes
57a47f5bbf Remove /dev tmpfs mountpoint 
Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume.charmes@docker.com> (github: creack)
 2014-03-04 13:21:22 -08:00
Guillaume J. Charmes
c74a8b28cd remove /run mountpoint 
Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume.charmes@docker.com> (github: creack)
 2014-03-04 12:32:17 -08:00
Guillaume J. Charmes
39d58129c3 Remove loopback mount bind 
Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume.charmes@docker.com> (github: creack)
 2014-03-04 12:30:52 -08:00
Alexander Larsson
5b5c884cc8 libcontainer: Use pivot_root instead of chroot 
Instead of keeping all the old mounts in the container namespace and
just using subtree as root we pivot_root so that the actual root in
the namespace is the root we want, and then we unmount the previous
mounts.

This has multiple advantages:

* The namespace mount tree is smaller (in the kernel)
* If you break out of the chroot you could previously access the host
  filesystem. Now the host filesystem is fully invisible to the namespace.
* We get rid of all unrelated mounts from the parent namespace, which means
  we don't hog these. This is important if we later switch to MS_PRIVATE instead
  of MS_SLAVE as otherwise these mounts would be impossible to unmount from the
  parent namespace.

Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson)
 2014-03-04 12:44:08 +01:00
Michael Crosby
5465fdf00f Factor out finalize namespace 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-03-03 12:15:47 -08:00
Michael Crosby
fdeea90fc8 Allow child process to live if daemon dies 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-27 09:33:36 -08:00
Michael Crosby
fb08b8b221 Code review updates 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-26 19:21:46 -08:00
Michael Crosby
7cd2245947 Ensure that loopback devices are mounted inside the conatiner 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-26 17:21:09 -08:00
Michael Crosby
70820b69ec Make network a slice to support multiple types 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-26 14:20:41 -08:00
Michael Crosby
93ed15075c Fix cross compile for make cross 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-25 15:19:13 -08:00
Michael Crosby
96e33a7646 Move container.json and pid file into a root specific driver dir 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-25 12:41:31 -08:00
Guillaume J. Charmes
91bf120c51 Better capability/namespace management 
Docker-DCO-1.1-Signed-off-by: Guillaume J. Charmes <guillaume.charmes@docker.com> (github: creack)
 2014-02-24 21:52:29 -08:00
Michael Crosby
f8453cd049 Refactor and improve libcontainer and driver 
Remove logging for now because it is complicating things
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-24 21:11:52 -08:00
Michael Crosby
9cb4573d33 Improve logging for nsinit 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-24 18:38:36 -08:00
Michael Crosby
a76407ac61 Cgroups allow devices for privileged containers 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-24 15:47:23 -08:00
Michael Crosby
1c79b747bb Honor user passed on container in nsinit 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-24 13:52:56 -08:00
Michael Crosby
01f9815b55 Fix tests with dockerinit lookup path 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-24 13:40:17 -08:00
Michael Crosby
fac41af25b Refactor driver to use Exec function from nsini 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-22 01:21:26 -08:00
Michael Crosby
ae423a036e Abstract out diff implementations for importing 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-22 00:29:21 -08:00
Michael Crosby
2412656ef5 Add syncpipe for passing context 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-21 22:58:30 -08:00
Michael Crosby
dd59f7fb28 Refactor exec method 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-21 22:37:09 -08:00
Michael Crosby
5a4069f3aa Refactor network creation and initialization into strategies 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-21 22:26:07 -08:00
Michael Crosby
9876e5b890 Export functions of nsinit 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-21 21:14:21 -08:00
Michael Crosby
2419e63d24 Initial commit of libcontainer running docker 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-21 17:23:49 -08:00
Michael Crosby
332755b99d Pass tty master to Exec 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-21 16:40:32 -08:00
Michael Crosby
c8fd81c278 Pass pipes into Exec function 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-21 16:28:43 -08:00
Michael Crosby
a352ecb01a Use lookup path for init 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-21 16:17:18 -08:00
Michael Crosby
ba025cb75c User os.Args[0] as name to reexec 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-21 15:32:50 -08:00
Michael Crosby
50c752fcb0 Add good logging support to both sides 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-21 14:56:17 -08:00
Michael Crosby
7f247e7006 Move tty into container.json 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-21 14:56:17 -08:00
Michael Crosby
6b2e963ce0 Refactor the flag management for main 
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
 2014-02-21 14:56:17 -08:00