LVS - Online Linux Manual Page

Section : 8
Updated : Thu May 10 2001
Version : 4th Berkeley Distribution
NAMEfos − failover services daemon to control the Red Hat clustering services.
SYNOPSISfos [-c cfgfile|--configfile=cfgfile] [-n|--nodaemon] [--nofork] [-t|--test-start] [-v|--verbose] [-f|--monitor] [-F|--active] [-?|--help] [--usage] [--version]
DESCRIPTIONfos reads the failover services section in the cluster configuration file lvs.cf. The program must be run with either "--monitor" or "--active" (or -f and -F) specified. If "--monitor" is used, the program starts nanny daemons to monitor IP services on a partner system. If "--active" is specified, the program starts the IP services on the local system by executing startup scripts. In both cases, a service failure or child daemon exiting will cause fos to terminate, which in turn will notify pulse that something failed and to initiate a cluster failover. fos is normally started by pulse although it can be run as a command line tool. Similarly, the configuration file that tells fos what to do is normally edited by piranha, but it can be manually edited. All activity from fos is logged to syslog (when fos is running as a daemon).
OPTIONS-c cfgfile|--configfile=cfgfile  Normally, fos uses lvs.cf as its configuration file, but this can be overridden and another file can be used. -n|--nodaemon  Normally, fos runs as a daemon, however using this option, fos runs in the foreground. When running in this mode, all its output is sent to STDOUT instead of syslog. --nofork  Don't fork, but do perform disassociate. -t|--test-start  Running fos is test mode allows the user to monitor what fos would actually do. This is only useful during debugging. -v|--verbose  Display additional debugging information as it runs. -f|--monitor  Start and control nanny daemons that will monitor services (defined in the lvs.cf file) on a partner computer system. Either this option, or "-F|--active" must be specified. -F|--active  Start the IP services (defined in the lvs.cf file) on the local system using scripts. Either this option or "-f|--monitor" must be specified. -?|--help  Shows a verbose usage listing. --usage  Outputs a terse argument summary. --version  Print program version.
SEE ALSOipvsadmn(8) lvsd(8) lvs.cf(5) nanny(8) pulse(8) send_arp(8)
AUTHORKeith Barrett <kbarrett@redhat.com> 0
Johanes Gumabo
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