Changes

LXC upstream has begun to integrate checkpoint/restore support through the lxc-checkpoint tool. This functionality has been in the recent released version of LXC---LXC 1.1.0 , you can install the LXC 1.1.0 or you can check out the development version on Ubuntu by doing:  

LXC upstream has begun to integrate checkpoint/restore support through the lxc-checkpoint tool. This functionality has been in the recent released version of LXC---LXC 1.1.0 , you can install the LXC 1.1.0 or you can check out the development version on Ubuntu by doing:  

<pre>

<source lang="bash">

sudo add-apt-repository ppa:ubuntu-lxc/daily

sudo add-apt-repository ppa:ubuntu-lxc/daily

sudo apt-get update

sudo apt-get update

sudo apt-get install lxc

sudo apt-get install lxc

</pre>

</source>

Next, create a container:

Next, create a container:

<pre>

<source lang="bash">

sudo lxc-create -t ubuntu -n u1 -- -r trusty -a amd64

sudo lxc-create -t ubuntu -n u1 -- -r trusty -a amd64

</pre>

</source>

And add the following lines (as above) to its config:

And add the following lines (as above) to its config:

<pre>

<source lang="bash">

cat | sudo tee -a /var/lib/lxc/u1/config << EOF

cat | sudo tee -a /var/lib/lxc/u1/config << EOF

# hax for criu

# hax for criu

lxc.cgroup.devices.deny = c 5:1 rwm

lxc.cgroup.devices.deny = c 5:1 rwm

EOF

EOF

</pre>

</source>

Finally, start, and checkpoint the container:

Finally, start, and checkpoint the container:

<pre>

<source lang="bash">

sudo lxc-start -n u1

sudo lxc-start -n u1

sleep 5s  # let the container get to a more interesting state

sleep 5s  # let the container get to a more interesting state

sudo lxc-checkpoint -s -D /tmp/checkpoint -n u1

sudo lxc-checkpoint -s -D /tmp/checkpoint -n u1

</pre>

</source>

At this point, the container's state is stored in /tmp/checkpoint, and the filesystem is in /var/lib/lxc/u1/rootfs. You can restore the container by doing:

At this point, the container's state is stored in /tmp/checkpoint, and the filesystem is in /var/lib/lxc/u1/rootfs. You can restore the container by doing:

<pre>

<source lang="bash">

sudo lxc-checkpoint -r -D /tmp/checkpoint -n u1

sudo lxc-checkpoint -r -D /tmp/checkpoint -n u1

</pre>

</source>

And then, get your container's IP and ssh in:

And then, get your container's IP and ssh in:

<pre>

<source lang="bash">

ssh ubuntu@$(sudo lxc-info -i -H -n u1)

ssh ubuntu@$(sudo lxc-info -i -H -n u1)

</pre>

</source>

===Troubleshooting===

===Troubleshooting===