Convert OpenVZ VM to LXC VM
Install same version lxc OS
lxc launch ubuntu:20.04 lxc-server
lxc stop lxc-server
rm -rf /var/snap/lxd/common/lxd/storage-pools/default/containers/lxc-server/rootfs
mkdir /var/snap/lxd/common/lxd/storage-pools/default/containers/lxc-server/rootfs
On Ubuntu 20.04 OpenVZ VM run:
rsync -avz -e ssh --exclude=etc/inittab --exclude=etc/network/interfaces --exclude=dev/ --exclude=sys/ --exclude=proc/ / [email protected]:/var/snap/lxd/common/lxd/storage-pools/default/containers/lxc-server/rootfs/
vim /var/snap/lxd/common/lxd/storage-pools/default/containers/lxc-server/rootfs/etc/network/interfaces
auto lo
iface lo inet loopback
source /etc/network/interfaces.d/*.cfg
mkdir /var/snap/lxd/common/lxd/storage-pools/default/containers/lxc-server/rootfs/etc/network/interfaces.d/
vim /var/snap/lxd/common/lxd/storage-pools/default/containers/lxc-server/rootfs/etc/network/interfaces.d/eth0.cfg
# The primary network interface
auto eth0
iface eth0 inet dhcp
lxc start lxc-server
For sure you need to stop MySQL/PostgreSQL before rsync or if huge database you can resync database after syncing data from OpenVZ server