icmpmonitor(1)icmpmonitor(1)NAMEicmpmonitor - multiple host monitoring tool
SYNOPSISicmpmonitor [-f cfg file] [-d] [-v] [-r]
DESCRIPTION
The icmpmonitor Using the InterNet Control Message Protocol (ICMP)
"ECHO" facility, monitors several hosts, and notify admin if some of
them are down.
OPTIONSicmpmonitor accepts following options:
-d if specified, the program will detach itself from control ter‐
minal and work in 'daemon' mode. All error messages will go to
syslog.
-f <configuration file>
Name of configuration file.
-v if specified, the program will produce more log messages
describing its activity.
-r Execute DOWN command repeatedly until host will be up again. If
it is not specified, the command is excuted only once.
CONFIGURATION FILE FORMAT
You need to create the configuration file. You can find a sample one in
the distribution named 'sample.cfg'. The file consists of one or more
lines. Lines starting with "#" are comments and are ignored. Each line
must contain following fields, separeated by spaces or tabs:
Hostname
Name of the host which will be monitored.
Ping Interval
Interval (in seconds) on which ICMP packets will be sent to the
host to check it's status.
Max. Delay
Maximum delay (in seconds) after which host considered to be
"down" if no response was received.
Up Command
Command which will be executed when host became accessible.
This command is executed using "sh -c" and may contain shell
syntax. If command contain spaces or tabs it should be quoted.
If the command is executing some lenghy operation it is recom‐
mended to start it as detached process (for example using '&'),
because icmpmonitor will not resume monitoring of this and
other hosts until command is finished.
Down Command
Command which will be executed when host became not accessible.
This command will be executed using "sh -c" and may contain
shell syntax. If command contain spaces or tabs it should be
quoted. If the command is executing some lenghy operation it
is recommended to start it as detached process (for example
using '&'), because icmpmonitor will not resume monitoring of
this and other hosts until command is finished.
Startup Condition (optional)
Condition of the host that should be assumed on startup. Pos‐
sible values are "auto", "down", "none" and "up". The parame‐
ter is optional with "up" being the default value. The main
purpose is controlling which up/down commands will be launched
on startup. "auto" detects the state of the host silently on
startup and doesn't launch any command first. "down" assumes
the host is down and executes the up command on the first ping
recieved. Similar to "up". "none" starts either up or down
command on startup.
BUGS
It was reported that some systems (e.g. Solaris 2.5) do not have func‐
tion vsnprintf. In such case icmpmonitor will use vsprintf instead, but
this could cause buffer overflow problem.
If you find any other bugs, please follow link to bug tracking system
from ICMPmonitor project home page to file them.
SEE ALSO
http://www.crocodile.org/software.html
AUTHOR
Vadim Zaliva <lord@crocodile.org>
CONTRIBUTORS
I would like to thank following people for help in developement of this
software: Alexandr S. Dubovicov <shurik@te.net.ua>, Andrey Arhipov
<andy@paco.net>, Bernhard Lutzmann <belu@gmx.at>, Ingo Saitz
<Salz@users.sourceforge.net>
Version 1.2 icmpmonitor(1)
