Ubuntu cloud image demonstration

by smoser 7 years ago

GNU/Linux ◆ screen.xterm-256color ◆ bash 3007 views

This will demonstrate booting an Ubuntu cloud image locally under qemu-system-x86_64 and providing it information on a second disk that is read by the NoCloud datasource in cloud-init.

The 16.04 Ubuntu cloud image is unmodified from a download at http://cloud-images.ubuntu.com/releases/xenial/

To keep the original image clean we use qemu-img to create a copy-on-write image in qcow2 format backed by the original ubuntu-16.04-server-cloudimg-amd64-disk1.img .

‘cloud-localds’ is used to create the ‘seed.img’ is available in the cloud-image-utils package. ######

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You can download this recording in asciicast v1 format, as a .json file.

Download

Replay in terminal

You can replay the downloaded recording in your terminal using the asciinema play command:

asciinema play 132013.json

If you don't have asciinema CLI installed then see installation instructions.

Use with stand-alone player on your website

Download asciinema player from the releases page (you only need .js and .css file), then use it like this:

<!DOCTYPE html>
<html>
<head>
  <link rel="stylesheet" type="text/css" href="asciinema-player.css" />
</head>
<body>
  <div id="player"></div>
  <script src="asciinema-player.min.js"></script>
  <script>
    AsciinemaPlayer.create(
      '/assets/132013.json',
      document.getElementById('player'),
      { cols: 80, rows: 27 }
    );
  </script>
</body>
</html>

See asciinema player quick-start guide for full usage instructions.

While this site doesn't provide GIF conversion at the moment, you can still do it yourself with the help of asciinema GIF generator utility - agg.

Once you have it installed, generate a GIF with the following command:

agg https://asciinema.org/a/132013 demo.gif

Or, if you already downloaded the recording file:

agg demo.cast demo.gif

Check agg --help for all available options. You can change font family and size, select color theme, adjust speed and more.

See agg manual for full usage instructions.