NAME

       xenwatchdogd - Xen hypercall based watchdog daemon

SYNOPSIS

       xenwatchdogd [ OPTIONS ] <TIMEOUT> [ <SLEEP> ]

DESCRIPTION

       xenwatchdogd arms the Xen watchdog timer to TIMEOUT every SLEEP seconds. If the xenwatchdogd process dies
       or is delayed for more than TIMEOUT seconds, then Xen will take the on_watchdog action specified in the
       domain configuration (see xl.cfg(5)). If xenwatchdogd is running in dom0, the whole system will reboot.

OPTIONS

       -h, --help
           Display a help message.

       -F, --foreground
           Run in the foreground. The default behaviour is to daemonize.

       -x, --safe-exit
           Disable  watchdog  on  orderly  exit.  The default behaviour is to arm the watchdog to 300 seconds to
           allow time for the domain to shutdown.  See also the SIGNALS section.

       timeout
           The number of seconds to arm the Xen watchdog timer. This must be set to a minimum of two.

       sleep
           The number of seconds to sleep in between calls to arm the Xen watchdog timer. This must be at  least
           one second, and less than the timeout value. If not specified, it defaults to half the timeout value.

SIGNALS

       SIGUSR1  Will  cause  the  program  to  disarm  the  watchdog  timer  and exit, regardless of whether the
       --safe-exit option was passed.

AUTHOR

       Citrix Ltd and other contributors.

4.20.1-pre                                         2025-05-05                                    xenwatchdogd(8)