chyves-demo-auto-reverted-snapshot

by EpiJunkie 9 years ago

FreeBSD • xterm • csh 3200 views

This is demonstration of snapshot functionality and the automated revert to snapshot on boot, reboot, or both functionality.

chyves info -bv

chyves obsd snapshot list

chyves obsd snapshot

chyves obsd snapshot list

chyves obsd start

chyves obsd console

vi chyves.demo.txt

< This was changed after the first snapshot was taken. >

halt -p

chyves obsd snapshot rollback

chyves obsd start

chyves obsd console

vi chyves.demo.txt

Well you can see the snapshot reverted the change I made to this document. No big deal right? I mean that is the purpose of a ZFS snapshot. Well there is a feature with chyves that speeds this up by automating this process on boot or reboot or both. This is done by setting the guest property ‘revert_to_snapshot’ and the ‘revert_to_snapshot_method’.

halt -p

~~.

< To make this interesting, we will change the RAM allocation and add a tap interface. >

chyves info -bv

chyves network bridge2 private

chyves network obsd add tap bridge2

chyves obsd set ram=2g revert_to_snapshot_method=reboot

chyves info -bv

chyves list bridges

chyves obsd start

chyves obsd console

cat chyves.demo.txt

`reboot` `~~.` [ Watching the reversion process in the host terminal ] `chyves obsd console` `cat chyves.demo.txt` `ifconfig` < Seems the tap interface is missing. > `dmesg | grep mem` < Seem the ram is back down to 2G. > < Let's see what the host changes were. > `~~.` `chyves info -bv` `chyves list bridges` < The host also removed the device that no longer exists to prevent a conflict later on. > < If a tap interface did exist on the snapshot state that the changed state had, it would be added to the default bridge. >

More by EpiJunkie

chyves-create-debian-guest 26:46

by EpiJunkie 9 years ago

chyves-create-openbsd59-guest 5:40

by EpiJunkie 9 years ago

chyves-demo-raw-image-file 4:12

by EpiJunkie 9 years ago

chyves-demo-clone-use 13:21

by EpiJunkie 9 years ago

See all

https://asciinema.org/a/83394

Copied!

Append ?t=30 to start the playback at 30s, ?t=3:20 to start the playback at 3m 20s.

See sharing docs for more link customization options.

Embed as image link

Use snippets below to display a preview image linking to this recording.
Ideal for places where scripts are not allowed, such as project README files.

HTML:

<a href="https://asciinema.org/a/83394" target="_blank"><img src="https://asciinema.org/a/83394.svg" /></a>

Copied!

Markdown:

[![asciicast](https://asciinema.org/a/83394.svg)](https://asciinema.org/a/83394)

Copied!

Embed the player

If you're embedding on your own page or on a site which permits script tags, you can use the full player widget:

<script src="https://asciinema.org/a/83394.js" id="asciicast-83394" async="true"></script>

Copied!

Paste the above script tag where you want the player to be displayed on your page.

See embedding docs for more player customization options.

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 83394.json

Copied!

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="/assets/asciinema-player.css" />
</head>
<body>
  <div id="player"></div>
  <script src="/assets/asciinema-player.min.js"></script>
  <script>
    AsciinemaPlayer.create(
      '/assets/83394.json',
      document.getElementById('player'),
      { cols: 128, rows: 32 }
    );
  </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/83394 demo.gif

Copied!

Or, if you already downloaded the recording file:

agg demo.cast demo.gif

Copied!

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.