1LVS(8)                      System Manager's Manual                     LVS(8)
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NAME

6       fos  -  failover services daemon to control the Red Hat clustering ser‐
7       vices.
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SYNOPSIS

10       fos  [-c   cfgfile|--configfile=cfgfile]   [-n|--nodaemon]   [--nofork]
11       [-t|--test-start]     [-v|--verbose]    [-f|--monitor]    [-F|--active]
12       [-?|--help] [--usage] [--version]
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DESCRIPTION

15       fos reads the failover services section in  the  cluster  configuration
16       file  lvs.cf.  The  program  must  be  run  with  either "--monitor" or
17       "--active" (or -f and -F) specified. If "--monitor" is used,  the  pro‐
18       gram  starts  nanny daemons to monitor IP services on a partner system.
19       If "--active" is specified, the program starts the IP services  on  the
20       local  system  by  executing  startup scripts. In both cases, a service
21       failure or child daemon exiting will cause fos to terminate,  which  in
22       turn  will notify pulse that something failed and to initiate a cluster
23       failover.
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25       fos is normally started by pulse although it can be run  as  a  command
26       line tool.  Similarly, the configuration file that tells fos what to do
27       is normally edited by piranha, but it can be manually edited.
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29       All activity from fos is logged to syslog (when fos  is  running  as  a
30       daemon).
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OPTIONS

33       -c cfgfile|--configfile=cfgfile
34              Normally,  fos  uses  lvs.cf as its configuration file, but this
35              can be overridden and another file can be used.
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37       -n|--nodaemon
38              Normally, fos runs as a daemon, however using this  option,  fos
39              runs in the foreground.  When running in this mode, all its out‐
40              put is sent to STDOUT instead of syslog.
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42       --nofork
43              Don't fork, but do perform disassociate.
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45       -t|--test-start
46              Running fos is test mode allows the user  to  monitor  what  fos
47              would actually do.  This is only useful during debugging.
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49       -v|--verbose
50              Display additional debugging information as it runs.
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52       -f|--monitor
53              Start  and  control  nanny  daemons  that  will monitor services
54              (defined in the lvs.cf file)  on  a   partner  computer  system.
55              Either this option, or "-F|--active" must be specified.
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57       -F|--active
58              Start  the IP services (defined in the lvs.cf file) on the local
59              system using scripts. Either this option or "-f|--monitor"  must
60              be specified.
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62       -?|--help
63              Shows a verbose usage listing.
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65       --usage
66              Outputs a terse argument summary.
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68       --version
69              Print program version.
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SEE ALSO

73       ipvsadmn(8) lvsd(8) lvs.cf(5) nanny(8) pulse(8) send_arp(8)
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AUTHOR

77       Keith Barrett <kbarrett@redhat.com>
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814th Berkeley Distribution       Thu May 10 2001                         LVS(8)
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