The main goal of the keepalived project is to add a strong & robust keepalive facility to the Linux Virtual Server project. It implements a multilayer TCP/IP stack checks. Keepalived implements a framework based on three family checks : Layer3, Layer4 & Layer5. This framework gives the daemon the ability of checking a LVS server pool states. Keepalived can be sumarize as a LVS driving daemon.

Keepalived implementation is based on an I/O multiplexer to handle a strong multi-threading framework. All the events process use this I/O multiplexer.

Keepalived is free software, Copyright (C) Alexandre Cassen. See the file COPYING for copying conditions.

OPENSSL TOOLKIT LICENCE EXCEPTION

In addition, as the copyright holder of Keepalived, I, Alexandre Cassen, acassen@linux-vs.org, grant the following special exception:

    I, Alexandre Cassen, <acassen@linux-vs.org>, explicitly allow
    the compilation and distribution of the Keepalived software with
    the OpenSSL Toolkit.