Using CRIU to reboot an OpenVPN server

by user:79575 5 years ago

GNU/Linux ◆ xterm-256color ◆ bash 1899 views

This shows a client staying connected over UDP to an OpenVPN server while the VPN process is checkpointed using CRIU. After checkpointing the system is rebooted via kexec. After reboot the OpenVPN process is restored and the VPN connection stays connected during the whole time.

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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 206067.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/206067.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 offer 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 run the following command to create GIF file:

agg https://asciinema.org/a/206067 206067.gif

Or, if you already downloaded the recording file:

agg 206067.json 206067.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.