Container Migration using Podman

by user:79575 5 years ago

GNU/Linux ◆ xterm-256color ◆ bash 2432 views

This demonstrates how to migrate a running container from one system to another.

First the container is started, then checkpointed and exported to a checkpoint archive. Once the checkpoint archive has been transferred to the destination system it can be used to restore the container from that checkpoint archive.

Both involved system are running RHEL8 and require at least Podman 1.4.0.

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

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Replay in terminal

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

asciinema play 249918.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/249918.json',
      document.getElementById('player'),
      { cols: 236, rows: 60 }
    );
  </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/249918 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.