Docker on CentOs7.2+ : How to update storage driver to overlay2

by cdelaitre 7 years ago

GNU/Linux ◆ xterm-color ◆ bash 13655 views

Check current docker version

docker –version

Check current docker storage-driver

docker info |grep -i storage

Check current Docker directory ftype (default : /var/lib/docker)

xfs_info /home/docker |grep ftype=1

Check yum-plugin-ovl installed

yum install yum-plugin-ovl

Stop docker

systemctl stop docker

Add overlay2 to daemon.json

touch /etc/docker/daemon.json vim /etc/docker/daemon.json

{ “storage-driver”: “overlay2”, “storage-opts”: [

"overlay2.override_kernel_check=true"

] }

BackUp Current Docker directory (default : /var/lib/docker)

cd /home/docker mkdir /tmp/BACKUP mv * /tmp/BACKUP/

Start docker

systemctl start docker

Check new docker storage-driver

docker info |grep -i storage

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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 122619.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/122619.json',
      document.getElementById('player'),
      { cols: 127, rows: 36 }
    );
  </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/122619 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.