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  1. 16 May, 2013 4 commits
    • lxc: add clone hook. · 148e91f5
      Serge Hallyn authored 
      Add a clone hook called from api_clone.  Pass arguments to it from
lxc_clone.c.

The clone update hook is called while the container's bdev is mounted.
Information about the container is passed in through environment
variables LXC_ROOTFS_PATH, LXC_NAME, The LXC_ROOTFS_MOUNT, and
LXC_CONFIG_FILE.

LXC_ROOTFS_MOUNT=/usr/lib/x86_64-linux-gnu/lxc
LXC_CONFIG_FILE=/var/lib/lxc/demo3/config
LXC_ROOTFS_PATH=/var/lib/lxc/demo3/rootfs
LXC_NAME=demo3

So from the hook, updates to the container should be made under
$LXC_ROOTFS_MOUNT/ .

The hook also receives command line arguments as follows:
First argument is container name, second is always 'lxc', third
is the hook name (always clone), then come the arguments which
were passed to lxc-clone.  I.e. when I did:

sudo lxc-clone demo2 demo3 -- hey there dude

the arguments passed in were "demo3 lxc clone hey there dude"

I personally would like to drop the first two arguments.  The
name is available as $LXC_NAME, and the section argument ('lxc')
is meaningless.  However, doing so risks invalidating existing
hooks.

Soon analogous create and destroy hooks will be added as well.
Signed-off-by: 's avatarSerge Hallyn <serge.hallyn@ubuntu.com>
Acked-by: 's avatarStéphane Graber <stgraber@ubuntu.com>
    • cgroup: prevent DOS when a hierachy is mounted multiple times · 9a93d992
      Serge Hallyn authored 
      When starting a container, we walk through all cgroup mounts looking
for a unique directory name we can use for this container.  If the
name we are trying is in use, we try another name.  If it is not in
use in the first mount we check, we need to check other hierarchies
as it may exist there.  But we weren't checking whether we have already
checked a subsystem - so that if freezer was mounted twice, we would
create it in the first mount, see it exists in the second, so start
over trying in the second mount.

To fix this, keep track of which subsystems we have already checked,
and do not re-check.

(See http://pad.lv/1176287 for a bug report)

Note we still need to add, at the next: label, the removal of the
directories we've already created.  I'm keeping that for later as
it's far lower priority than this fix, and I don't want to risk
introducing a regression for that.
Signed-off-by: 's avatarSerge Hallyn <serge.hallyn@ubuntu.com>
    • set non device cgroup items before the cgroup is entered · 6031a6e5
      Dwight Engen authored 
      This allows some special cgroup items such as memory.kmem.limit_in_bytes
to be successfully set, since they must be set before any task is put
into the cgroup.

The devices cgroup is setup later giving the container a chance to mount
file systems before the device it might want to mount from becomes
unavailable.
Signed-off-by: 's avatarDwight Engen <dwight.engen@oracle.com>
Signed-off-by: 's avatarSerge Hallyn <serge.hallyn@ubuntu.com>
    • doc/lxc.conf minor clarifications · d9e80daf
      Dwight Engen authored 
      Signed-off-by: 's avatarDwight Engen <dwight.engen@oracle.com>
Signed-off-by: 's avatarSerge Hallyn <serge.hallyn@ubuntu.com>
  3. 15 May, 2013 2 commits
    • lxc-fedora-template: autodev, hostname, ARM archs, Raspberry Pi fixes · 627fe3b4
      Michael H. Warfield authored 
      This took a lot longer for me to get around to it...  Sorry.

Patch to the lxc-fedora template.

I didn't get any further comments from my earlier proposal, weeks ago,
and did get one addition based on comments about properly setting the
hostname in /etc/hostname, which I've added.  I could have broken them
into separate patches but most are pretty small and minor.

Changes:

* Map armv6l and armv7l architectures to "arm" for yum and repos to
function properly.

* Detect Fedora Remix distros with no "/etc/fedora-release" file
(Raspberry Pi) and find proper release versions when "remix" part of the
file context.

* Change default Fedora container on non-Fedora hosts to Fedora 17.

* Added code for autodev for Fedora systemd containers.

* Added code to set /etc/hostname for Fedora > 14 (systemd).

* Fix a few typos.

Regards,
Mike
--
Michael H. Warfield (AI4NB) | (770) 985-6132 |  mhw@WittsEnd.com
   /\/\|=mhw=|\/\/          | (678) 463-0932 |  http://www.wittsend.com/mhw/
   NIC whois: MHW9          | An optimist believes we live in the best of all
 PGP Key: 0x674627FF        | possible worlds.  A pessimist is sure of it!
--
Signed-off-by: 's avatarMichael H. Warfield <mhw@WittsEnd.com>
Signed-off-by: 's avatarSerge Hallyn <serge.hallyn@ubuntu.com>
    • lxc-busybox: check when bind-mounting host libdirs · 794fb287
      Bogdan Purcareata authored 
      The patch removes the behavior of automatically mounting /lib
and /usr/lib, since this is duplicated a few lines below. It will
also remove the risk of failing when one of these entries are not
present on the host - e.g. on a 64bit machine.
Signed-off-by: 's avatarBogdan Purcareata <bogdan.purcareata@freescale.com>
Signed-off-by: 's avatarSerge Hallyn <serge.hallyn@ubuntu.com>
  5. 14 May, 2013 2 commits
  7. 13 May, 2013 1 commit
  9. 09 May, 2013 1 commit
  11. 08 May, 2013 2 commits
    • lxc-monitor multiple paths · 8d06bd13
      Dwight Engen authored 
      Signed-off-by: 's avatarDwight Engen <dwight.engen@oracle.com>
Signed-off-by: 's avatarSerge Hallyn <serge.hallyn@ubuntu.com>
    • lxc-ps: handle cgroup collisions · 566c0d6d
      Serge Hallyn authored 
      A few months ago cgroup handling in lxc was updated so that if
/sys/fs/cgroup/$cgroup/lxc/$container already exists (most often
due to another container by the same name under a different lxcpath),
then /sys/fs/cgroup/$cgroup/lxc/${container}-N would be used.

lxc-ps was never updated to handle this.  Fix that.

(Note, the ns cgroup is being special cased there, but I don't
really believe ns cgroup works any more.)

It would be preferable to rewrite lxc-ps in python or in C, but
this at least makes the basic lxc-ps work in the case of multiple
containers with the same name.

Changelog:
	fix missing fi.
	replace 'z1' with '$container' as pointed out by Christian
Signed-off-by: 's avatarSerge Hallyn <serge.hallyn@ubuntu.com>
  13. 07 May, 2013 8 commits
  15. 06 May, 2013 3 commits
  17. 03 May, 2013 9 commits
  19. 02 May, 2013 3 commits
  21. 01 May, 2013 1 commit
  23. 30 Apr, 2013 4 commits