View source for User:Ncopa/migrate-vserver-to-lxc

Some notes on how to migrate an Alpine Linux vserver to an lxcontainer.

Its fairly straightforward. Basically, the only thing that differs is:
* /etc/inittab
* /etc/network/interfaces

On vserver the host sets up the network, on LXC the container needs to do it itself.

== Migration steps ==
Here follows some step by step. build-edge-x86 is used as example.

=== Create container ===
Create the new container on the LXC host
{{cmd|lxc-create -n build-edge-x86 -t alpine -- --release edge --arch x86}}

=== Backup inittab ===
Make a copy of the inittab to a location outside the container rootfs.
{{cmd|cp /var/lib/lxc/build-edge-x86/rootfs/etc/inittab /var/lib/lxc/build-edge-x86/}}

=== Copy data ===
Use rsync to mirror the vserver. We do this before we shut down the vserver guest to keep downtime as low as possible. In this example we rsync from the vserver host:
{{cmd|rsync --partial --delete --numeric-ids -rva /vservers/build-edge/* bld1.alpinelinux.org:/var/lib/lxc/build-ege-x86/rootfs/}}