nagios 自定义插件demo
#!/bin/bash loadavg=$( uptime | awk -F: '{print $4}' | xargs ) load1int=$( echo $loadavg | cut -d "." -f 1 )
load5int=$( echo $loadavg | awk -F, '{print $2}' | xargs | cut -d "." -f 1 )
load15int=$( echo $loadavg | awk -F, '{print $3}' | xargs | cut -d "." -f 1 ) load1=$( echo $loadavg | awk -F, '{print $1}' )
load5=$( echo $loadavg | awk -F, '{print $2}' )
load15=$( echo $loadavg | awk -F, '{print $3}' ) output="Load Average: $loadavg | Load_1min=$load1, Load_5min=$load5, Load_15min=$load15" if [ $load1int -le 1 -a $load5int -le 1 -a $load15int -le 1 ]
then
echo "OK- $output"
exit 0
elif [ $load1int -le 2 -a $load5int -le 2 -a $load15int -le 2 ]
then
echo "WARNING- $output"
exit 1
elif [ $load1int -gt 2 -a $load5int -gt 2 -a $load15int -gt 2 ]
then
echo "CRITICAL- $output"
exit 2
else
echo "UNKNOWN- $output"
exit 3
fi #!/bin/ksh ################################################################################
# Sample Nagios plugin to monitor free memory on the local machine #
# Author: Daniele Mazzocchio (http://www.kernel-panic.it/) #
################################################################################ VERSION="Version 1.0"
AUTHOR="(c) 2007-2009 Daniele Mazzocchio (danix@kernel-panic.it)" PROGNAME=`/usr/bin/basename $0` # Constants
BYTES_IN_MB=$(( 1024 * 1024 ))
KB_IN_MB=1024 # Exit codes
STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3 # Helper functions ############################################################# function print_revision {
# Print the revision number
echo "$PROGNAME - $VERSION"
} function print_usage {
# Print a short usage statement
echo "Usage: $PROGNAME [-v] -w <limit> -c <limit>"
} function print_help {
# Print detailed help information
print_revision
echo "$AUTHOR\n\nCheck free memory on local machine\n"
print_usage /bin/cat <<__EOT Options:
-h
Print detailed help screen
-V
Print version information -w INTEGER
Exit with WARNING status if less than INTEGER MB of memory are free
-w PERCENT%
Exit with WARNING status if less than PERCENT of memory is free
-c INTEGER
Exit with CRITICAL status if less than INTEGER MB of memory are free
-c PERCENT%
Exit with CRITICAL status if less than PERCENT of memory is free
-v
Verbose output
__EOT
} # Main ######################################################################### # Total memory size (in MB)
tot_mem=$(( `/sbin/sysctl -n hw.physmem` / BYTES_IN_MB))
# Free memory size (in MB)
free_mem=$(( `/usr/bin/vmstat | /usr/bin/tail -1 | /usr/bin/awk '{ print $5 }'` / KB_IN_MB ))
# Free memory size (in percentage)
free_mem_perc=$(( free_mem * 100 / tot_mem )) # Verbosity level
verbosity=0
# Warning threshold
thresh_warn=
# Critical threshold
thresh_crit= # Parse command line options
while [ "$1" ]; do
case "$1" in
-h | --help)
print_help
exit $STATE_OK
;;
-V | --version)
print_revision
exit $STATE_OK
;;
-v | --verbose)
: $(( verbosity++ ))
shift
;;
-w | --warning | -c | --critical)
if [[ -z "$2" || "$2" = -* ]]; then
# Threshold not provided
echo "$PROGNAME: Option '$1' requires an argument"
print_usage
exit $STATE_UNKNOWN
elif [[ "$2" = +([0-9]) ]]; then
# Threshold is a number (MB)
thresh=$2
elif [[ "$2" = +([0-9])% ]]; then
# Threshold is a percentage
thresh=$(( tot_mem * ${2%\%} / 100 ))
else
# Threshold is neither a number nor a percentage
echo "$PROGNAME: Threshold must be integer or percentage"
print_usage
exit $STATE_UNKNOWN
fi
[[ "$1" = *-w* ]] && thresh_warn=$thresh || thresh_crit=$thresh
shift 2
;;
-?)
print_usage
exit $STATE_OK
;;
*)
echo "$PROGNAME: Invalid option '$1'"
print_usage
exit $STATE_UNKNOWN
;;
esac
done if [[ -z "$thresh_warn" || -z "$thresh_crit" ]]; then
# One or both thresholds were not specified
echo "$PROGNAME: Threshold not set"
print_usage
exit $STATE_UNKNOWN
elif [[ "$thresh_crit" -gt "$thresh_warn" ]]; then
# The warning threshold must be greater than the critical threshold
echo "$PROGNAME: Warning free space should be more than critical free space"
print_usage
exit $STATE_UNKNOWN
fi if [[ "$verbosity" -ge 2 ]]; then
# Print debugging information
/bin/cat <<__EOT
Debugging information:
Warning threshold: $thresh_warn MB
Critical threshold: $thresh_crit MB
Verbosity level: $verbosity
Total memory: $tot_mem MB
Free memory: $free_mem MB ($free_mem_perc%)
__EOT
fi if [[ "$free_mem" -lt "$thresh_crit" ]]; then
# Free memory is less than the critical threshold
echo "MEMORY CRITICAL - $free_mem_perc% free ($free_mem MB out of $tot_mem MB)"
exit $STATE_CRITICAL
elif [[ "$free_mem" -lt "$thresh_warn" ]]; then
# Free memory is less than the warning threshold
echo "MEMORY WARNING - $free_mem_perc% free ($free_mem MB out of $tot_mem MB)"
exit $STATE_WARNING
else
# There's enough free memory!
echo "MEMORY OK - $free_mem_perc% free ($free_mem MB out of $tot_mem MB)"
exit $STATE_OK
fi
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