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The main goal of this project is to provide simple and robust facilitiesfor loadbalancing and high-availability to Linux system and Linux basedinfrastructures. Loadbalancing framework relies on well-known and widelyused Linux Virtual Server (IPVS) kernel module providing Layer4 loadbalancing.Keepalived implements a set of checkers to dynamically and adaptively maintainand manage loadbalanced server pool according their health. On the other handhigh-availability is achieved by the Virtual Router Redundancy Protocol (VRRP).VRRP is a fundamental brick for router failover. In addition, Keepalivedimplements a set of hooks to the VRRP finite state machine providing low-leveland high-speed protocol interactions. In order to offer fastest networkfailure detection, Keepalived implements the Bidirectional Forwarding Detection(BFD) protocol. VRRP state transition can take into account BFD hints to drivefast state transition. Keepalived frameworks can be used independently or alltogether to provide resilient infrastructures.

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

To build keepalived from the git source tree, you will need to haveautoconf, automake and various libraries installed. See the INSTALLfile for details of what needs to be installed and what needs to beexecuted before building keepalived.

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 allowthe compilation and distribution of the Keepalived software withthe OpenSSL Toolkit.