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user47227
Asked: 2016-04-22 01:50:24 +0800 CST

Moving LXD containers to clean install of 16.04

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I have a load (~14) of LXD containers running on my 14.04 development machine.

I would like to do a clean install of 16.04 but I need to keep my containers.

What is the best approach to achieve this?

Should I publish the containers as images and then create new containers using those images when 16.04 is installed?

lxc

1 Answers

  1. Best Answer

    On your old Ubuntu 14.04:

    1. Publish your Container: 

      lxc publish --force 'name of container" --alias 'new name'

      Example:

      lxc publish --force 'lxc-wordpress' --alias 'lxc-image-wordpress'

    2. Export image:

      lxc image  export 'new name'

    The output is something like this:

    efaa243331f0a7c175376edaf796545a01ad09bb47f25a297b798e09fe66ee66.tar.gz

    Show size of export:

        du -h efaa243331f0a7c175376edaf796545a01ad09bb47f25a297b798e09fe66ee66.tar.gz

    1. Backup your export image.

    2. Backup your containers profile/s you can show with:

      lxc profile list

    You can save your *tar.gz in whatever secure place.

    Install Ubuntu 16.04.2 and configure your LXD environment

    Copy your backup image and, inside their directory, start import

    1. Import your container images:

       lxc image import efaa243331f0a7c175376edaf796545a01ad09bb47f25a297b798e09fe66ee66.tar.gz --alias lxc-image-wordpress

    2. Create and start your container based on your image:

       lxc launch lxc-image-wordpress lxc-wordpress
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