62008-03-18 17:28:11localhostconverted to 1.6 markup52007-02-13 23:19:03ac3bf142007-02-13 23:18:17ac3bf132007-02-13 23:16:39ac3bf122007-02-13 23:15:06ac3bf112007-02-13 23:05:40ac3bf1 UCARP allows a couple of hosts to share common virtual IP addresses in order to provide automatic failover. It is a portable userland implementation of the secure and patent-free Common Address Redundancy Protocol (CARP, OpenBSD’s alternative to the patents-bloated VRRP). Strong points of the CARP protocol are: very low overhead, cryptographically signed messages, interoperability between different operating systems and no need for any dedicated extra network link between redundant hosts. Linux Flavor: Ubuntu Per far girare UCARP su Debian/Ubuntu, bisogna creare un'interfaccia virtuale. Per fare cio basta inserire in /etc/network/interfaces qualcosa simile a: riavviare networking da inet.d con /etc/init.d/networking restart dando il comando ucarp --help si hanno le seguenti informazioni: (-i ): bind interface --srcip= (-s ): source (real) IP address of that host --vhid= (-v ): virtual IP identifier (1-255) --pass= (-p ): password --preempt (-P): becomes a master as soon as possible --addr= (-a ): virtual shared IP address --help (-h): summary of command-line options --advbase= (-b ): advertisement frequency --advskew= (-k ): advertisement skew (0-255) --upscript= (-u ): run to become a master --downscript= (-d ): run to become a backup --deadratio= (-r ): ratio to consider a host as dead --shutdown (-z): call shutdown script at exit --daemonize (-B): run in background --facility= (-f): set syslog facility (default=daemon) ]]>in seguito avviare ucarp con: DA COMPLETARE PRESTO... dato che ho un piccolo problema con gli indirizzi IP... per farlo partire all'avvio inserire la stringa in un file in /etc/rc2.d/S99NomeFileDiAvvio o creare uno script e chiamare lo script da rc2.d/S99NomeFileDiAvvio per esempio.