Signed-off-by: Christian Brauner <christian.brauner@canonical.com>

Signed-off-by: Christian Brauner <christian.brauner@canonical.com>

Signed-off-by: Christian Brauner <christian.brauner@canonical.com>

This allows to retrieve a file descriptor referring to a namespace.
Signed-off-by: Christian Brauner <christian.brauner@canonical.com>

cgroups: prevent segfault in cgfsng

When we set LXC_DEBUG_CGFSNG=1 we print out info about detected cgroup
hierarchies. When there's no named cgroup mounted we need to make sure that we
don't try to index an unallocated pointer.
Signed-off-by: Christian Brauner <christian.brauner@canonical.com>

lxc-checkpoint: automatically detect if --external or --veth-pair

With the criu release 2.8 criu deprecated the --veth-pair command-line
option in favor of --external:

f2037e6 veth: Make --external support --veth-pair

git tag --contains f2037e6d3445fc400
v2.8

With this commit lxc-checkpoint will automatically switch between
the new and old command-line option dependent on the detected
criu version.

For criu version older than 2.8 something like this will be used:

  --veth-pair eth0=vethYOK6RW@lxcbr0

and starting with criu version 2.8 it will look like this:

  --external veth[eth0]:vethCRPEYL@lxcbr0
Signed-off-by: Adrian Reber <areber@redhat.com>

cgroups: use %zu format specifier to print size_t

lxc-checkpoint: enable dirty memory tracking in criu

CRIU supports dirty memory tracking to take incremental checkpoints.
Incremental checkpoints are one way of reducing downtime during
migration. The first checkpoint dumps all the memory pages and the
second (and third, and fourth, ...) only dumps pages which have changed.

Most of the necessary code has already been implemented. This just adds
the existing functionality to lxc-checkpoint:

  -p, --pre-dump            Only pre-dump the memory of the container.
                            Container keeps on running and following
                            checkpoints will only dump the changes.
  --predump-dir=DIR         path to images from previous dump (relative to -D)

The following is an example from a container running CentOS 7 with psql
and tomcat:

 # lxc-checkpoint -n c7 -D /tmp/cp -p
Container keeps on running
 # du -h /tmp/cp
 229M	/tmp/cp
Sync initial checkpoint to destination
 # rsync -a /tmp/cp host2:/tmp/
Sync file-system
 # rsync -a /var/lib/lxc/c7 host2:/var/lib/lxc/
Final dump; container is stopped
 # lxc-checkpoint -n c7 -D /tmp/cp --predump-dir=../cp -s
 # du -h /tmp/cp2
 90M	/tmp/cp2

After transferring the second (incremental checkpoint) and the changes
to the container's file system the container can be restored on the
second host by pointing lxc-checkpoint to the second checkpoint
directory:

 # lxc-checkpoint -n c7 -D /tmp/cp2 -r
Signed-off-by: Adrian Reber <areber@redhat.com>

Signed-off-by: Christian Brauner <christian.brauner@canonical.com>

cgroups: remove isolated cpus from cpuset.cpus  …

debian: Don't depend on libui-dialog-perl

This package doesn't exist in stretch anymore, and it's unclear why we
were depending on a library to begin with (as opposed to having it
brought by whatever needs it).
Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>

conf: do not use %m format specifier

This is a GNU extension and some libcs might be missing it.
Signed-off-by: Christian Brauner <christian.brauner@canonical.com>

also stop lxc-net in runlevels 0 and 6

add lxc.egg-info to gitignore

install bash completion where pkg-config tells us to

Signed-off-by: Evgeni Golov <evgeni@debian.org>

Signed-off-by: Evgeni Golov <evgeni@debian.org>

there is no reason to not do this :)
Signed-off-by: Evgeni Golov <evgeni@debian.org>

cgroups: skip v2 hierarchy entry

Signed-off-by: Christian Brauner <christian.brauner@canonical.com>

templates: add squashfs support to lxc-ubuntu-cloud.in

Add squashfs format file support for lxc-ubuntu-cloud.in
Signed-off-by: Po-Hsu Lin <po-hsu.lin@canonical.com>

Update Ubuntu release name: add zesty

Add zesty to KNOWN_RELEASES
Remove EOL wily from KNOWN_RELEASES
Signed-off-by: Po-Hsu Lin <po-hsu.lin@canonical.com>

In case the system was booted with

    isolcpus=n_i-n_j,n_k,n_m

we cannot simply copy the cpuset.cpus file from our parent cgroup. For example,
in the root cgroup cpuset.cpus will contain all of the cpus including the
isolated cpus. Copying the values of the root cgroup into a child cgroup will
lead to a wrong view in /proc/self/status: For the root cgroup
/sys/fs/cgroup/cpuset /proc/self/status will correctly show

    Cpus_allowed_list:      0-1,3

even though cpuset.cpus will show

    0-3

However, initializing a subcgroup in the cpuset controller by copying the
cpuset.cpus setting from the root cgroup will cause /proc/self/status to
incorrectly show

    Cpus_allowed_list:      0-3

Hence, we need to make sure to remove the isolated cpus from cpuset.cpus. Seth
has argued that this is not a kernel bug but by design. So let us be the smart
guys and fix this in liblxc.

The solution is straightforward: To avoid having to work with raw cpulist
strings we create cpumasks based on uint32_t bit arrays.
Signed-off-by: Christian Brauner <christian.brauner@canonical.com>

lxc_append_string() appends strings without separator. This is mostly useful
for reading in whole files line-by-line.
Signed-off-by: Christian Brauner <christian.brauner@canonical.com>

create symlink for /var/run

this patch create /var/run link to point to /run.

This will fix various issue present when /var/run is persistent.
Signed-off-by: Marc Gariepy <gariepy.marc@gmail.com>

cgfs: various fixes

start: CLONE_NEWCGROUP after we have setup cgroups

If we do it earlier we end up with a wrong view of /proc/self/cgroup. For
example, assume we unshare(CLONE_NEWCGROUP) first, and then create the cgroup
for the container, say /sys/fs/cgroup/cpuset/lxc/c, then /proc/self/cgroup
would show us:

     8:cpuset:/lxc/c

whereas it should actually show

     8:cpuset:/
Signed-off-by: Christian Brauner <christian.brauner@canonical.com>

c/r: check state before doing a checkpoint/restore

This would already fail, but with a not-as-good error message. Let's make
the error better.
Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>

cleanup: /usr/bin/bash vs /bin/bash consistency

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>