User:Ncopa/migrate-vserver-to-lxc

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Revision as of 07:09, 18 October 2013 by Ncopa (talk | contribs) (initial)
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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

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.

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:

rsync --partial --delete --numeric-ids -rva /vservers/build-edge/* bld1.alpinelinux.org:/var/lib/lxc/build-ege-x86/rootfs/