centos7 - non-root podman

by vbatts 5 years ago

GNU/Linux ◆ xterm ◆ bash 3931 views

Using my shadow-utils-newxidmap as the stop gap until a newer shadow-utils is available to centos.

See also centos7 non-root buildah for installation and podman build//buildah bud example.

Gist of the commands run in this example:

yum install -y podman buildah
podman run -it --rm busybox echo hello
su - vbatts -c "podman run -it --rm busybox echo hello"
echo $?
curl -o /etc/yum.repos.d/vbatts-shadow-utils-newxidmap-epel-7.repo https://copr.fedorainfracloud.org/coprs/vbatts/shadow-utils-newxidmap/repo/epel-7/vbatts-shadow-utils-newxidmap-epel-7.repo
cat /etc/yum.repos.d/vbatts-shadow-utils-newxidmap-epel-7.repo
yum install -y shadow-utils46-newxidmap slirp4netns
echo "user.max_user_namespaces=28633" > /etc/sysctl.d/userns.conf
sysctl -p /etc/sysctl.d/userns.conf
echo "vbatts:100000:65536" >> /etc/subuid
echo "vbatts:100000:65536" >> /etc/subgid
su - vbatts -c "podman run -it --rm busybox echo hello"
su - vbatts -c "podman run -it --rm busybox echo whoami"
su - vbatts -c "podman run -it --rm busybox echo id"

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You can download this recording in asciicast v2 format, as a .cast file.

Download

Replay in terminal

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

asciinema play 221441.cast

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/221441.cast',
      document.getElementById('player'),
      { cols: 190, rows: 55 }
    );
  </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/221441 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.