Bering-uClibc 6.x

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Overview

Bering-uClibc is one of the branches of the LEAF (Linux Embedded Appliance Framework) project, delivering on LEAF's ambition to provide a secure, feature-rich, customizable embedded Linux network appliance for use in a variety of network topologies. Although it can be used in other ways, its primary goal is as a Internet gateway, BRAS, router, firewall and wireless access point.

Main Features

The key characteristics of Bering-uClibc 6.x are:

  • Based on a recent long-term release of the Linux Kernel.
  • Easy-of-use
    • Hardware detection during boot, necessary modules enabling the hardware will be loaded automatically.
    • Load modules when needed for various Packages - e.g. netfilter modules for shorewall[6].
    • Check for and receive updates with command line utility (upgrade) or Web GUI (webconf) from the Packages repository. (This feature has been introduced in the late 5.2 cycle for testing.)
  • Targeted to run on industry standard devices even with non-x86 processors.
    QEMU ARM Screenshot
    Bering-uClibc 5.0-prealpha running on an emulated ARM processor
  • Designed to perform well on relatively low-specification hardware. In particular:
    • The system runs from an in-memory filesystem. Disk storage is only required for booting and for storing configuration settings.
    • The uClibc-ng C library is used in place of the GNU C Library since uClibc-ng is much smaller in size.
    • Considerable use is made of BusyBox utilities as replacements for larger applications.
  • Focussed on providing excellent networking facilities.
  • Designed to have high fault tolerance:
    • There are no writes on HDD/flash during work (except saving configurations during maintenance) - so a power failure will not break file system.
    • Corrupted/erased config file, or even 'rm -rf /' isn't a problem - changes are stored permanently only when user requires that, and reboot will restore all as it was before.
    • Enabled by default watchdog, reboot on kernel panic and kernel soft-lockup detection will help to have minimum downtime of router.
    • Backup scripts will help to restore system state on storage failure/operator mistake.

Development History

Bering-uClibc 6.x is basically Bering-uClibc 5.x brought up to date with the latest versions of the main software components and with reworked toolchain. Bering-uClibc 6.0 provides in particular:

  • gcc update to 5.3.0.
  • The Linux kernel has been upgraded to 4.4.x.
  • The uClibc library is upgraded from uClibc 0.9.32 to uClibc-ng 1.0.17.
  • initmod.lrp has been removed; kernel modules are included in the kernel or loaded automatically on demand
  • a new WRAP optimized kernel and image is provided
  • logrotation has been improved

Version 6.0.0 was released in October 2016. Version 6.0.1 was released in December 2016. Version 6.0.2 was released in January 2017.

Version Changelog

Known Issues

Further Documentation

For further information see: