Move container without shut down first

[dhaiz]

I have a question,

I’m using LXD Cluster LXD-1 and LXD-2, I have an application container and need to stay online because the data keeps flowing every second.

If I want to move the container from LXD-1 to LXD-2, is it possible to move the container to another host server without having to shut down first?

Thanks

[turtle0x1]

LXD uses CRIU but it isn’t perfect and requires you to put in some work.

Its mentioned / explained a little in the docs here

Linux Containers - LXD - Has been moved to Canonical

A high level overview of what needs to be done was given in this thread.

Live migration with criu lxd latest with criu from sources

Hi, all, I am conducting my master’s research in current methods to perform live migration on containers. I have found that all migration techniques are heavily dependent on criu. As it turns out using Ubuntu 18.04 as host os, I have been unable to live migrate anything using lxc move, except alpine containers. Keep getting several errors associated to criu in all cases. Even with alpine the moment I install an SSH Daemon it fails. Can you suggest any scenario when live migration actually work…

It also seems possible to-do it with VM’s which might be easier but I dont have any practical experience to share, sorry!

[ruskofd (Florian Bobin (old account))]

Live-migration of containers seems to be a difficult topic compare to virtual machines. LXD VM live migration exists but for now, it is not as transparent as VMware vMotion (and even vMotion has problems with some applications).