Linux experiments

Work in progress!

Just some random notes on various experimental installations, configurations, setups... It might give you some inspiration too

Just about anything related to High Availability, Performance, Scalability, Robustness, IPv6, mail, web... is interesting.

Mostly based on Ubuntu LTS releases (Bionic 18.04 and Xenial 16.04)

Compression

Faster &&/|| better than gzip, bzip2, lzma, xz ...

• ZPAQ
• Zopfli & Zopflipng
• Brotli
• Zstd

LXC host setup

Ubuntu 16.04 Xenial, server version.

• PowerSaving
• NTP
• Disk checking

LXC guest setup

• Generic Installation
• Mail
  • Exim
  • Postfix + Spamassassin
  • Dovecot
  • SPF & DKIM
• HAProxy, with
  • Black listing (DROP list of Spamhaus)
• OpenLDAP
• Nginx
• WebDAV

Clustering

• GlusterFS
• Mail
• DNS

Groupware

Many of the components mentioned above are already blended into Kolab.

Schematic overview

Basically everything is running on an old laptop and applications run in separte containers. Not all details included and the "infrastructure" changes all the time...

Previous setup build on top of vserver

Available Information

• http://www.ubuntu.com
• https://help.ubuntu.com/lts/serverguide/index.html