Containers replication

Dear Stéphan,

Could you please consider the possibility to add a “containers’ replication between cluster’s nodes” (like Swarm does)?
This feature in some cases could be really helpful. Besides, I assume, this will add some popularity to such an awesome technology as LXC/LXD.

Is that very difficulty to do?

You can use the ceph storage driver to have instances use clustered storage, that way the instance filesystems are not stored on each LXD node themselves.