SYNOPSIS
hc [−d facility ] [−m] [−f hcfile ]
DESCRIPTION
Hc reads a configuration file structured similarly to a Makefile (see
make(1)), loads the healthchecker modules specified in this file and
starts a loop checking all the services and dependencies. On state
changes of a service, an action module is called which may start a
shell script to fix a failure situation, may send mail to inform an
administrator, or even send a pager message to an operator.
The state of the health checker can be monitored using the monitoring
clients getnode(l) and hcmon.cgi(l),providedthemonitoringthreadinside
hc was started using the option âˆâˆ’m. hcmon.cgi(1) is supposed to be
installed as a CGI program in a webserver, and can monitor all hc
instances on all servers that are reachable by Sun RPCs. This means
that no additional load is generated on the monitored server by the
monitoring interface.
OPTIONS
−d facility
increase the debug level of facility facility by 1. In most
cases, debug level 1 is already way to verbose.
−m start the monitoring thread. The thread will register a port
with the portmapper, on which monitoring information can be
retrieved. Use the clients getnode(l) or hcmon.cgi(l) for this
purpose.
−f hcfile
By default, hc reads the file Hcfile in the current working
directory to find its instructions. If this option is specified,
a different configuration file can be specified.
SEE ALSO
getnode(l), hcmon.cgi(l), hcmodules(l),
AUTHOR
Andreas F. Mueller <andreas.mueller@othello.ch>
Failover Utilities 03/12/04 HC(L)
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