Use the Nagios script to check the specified process memory usage

Because some of the recent online environment is always memory overflow, so you need to add some process memory usage monitoring, the search of other people's scripts are not very satisfied, so they wrote a code as follows:

#!/bin/bash
Help () {
echo "Usage: $0-p/var/run/pidfile-w used%-C used%"
echo "Exam: $0-p/var/run/pidfile-w 85-c 90"
Exit 3
}
ok=0; Wa=1; cr=2; un=3; war=$4; cri=$6; mi=${7:-0.9}; mx=${8:-0.8}
#MX: Critical line of performance data, calculated by multiplying the total amount of memory by the MX value, where 0.9 equals the current system total memory * 0.9, taking the result integral parts
#MI: Warning line of performance data, calculated by multiplying the total amount of memory by the MX value, where 0.8 equals the current system total memory * 0.8, taking the result integral parts
date= "Date +%y-%m-%d~%k:%m:%s"; Nul=/dev/null
tag=$1; ["$TAG"!= "-P"] && Help
Pid=$2
[!-F "$PID"] && echo "' $DATE ' Error: $PID not exist." && Help
if! PS aux|grep "\< ' cat $PID ' \>" |grep-v grep &> $NUL; then
echo "' $DATE ' Error: ' cat $PID ' not exist."
Help
Else
Total= '/usr/bin/free-m|grep Mem|awk ' {print $} '
Min= ' echo ' $TOTAL * $MI |/usr/bin/bc|awk-f. ' {print '} '
Max= ' echo ' $TOTAL * $MX |/usr/bin/bc|awk-f. ' {print '} '
Osm= '/usr/bin/free-m|grep ' \<cache\> ' |awk ' {print $NF} '
Id= ' Cat $PID '
bmem= '/usr/bin/top-bn 1|grep ' \< $ID \> ' |awk ' {print $} '
Declare-u mmem= '/usr/bin/top-bn 1|grep \< $ID \> ' |awk ' {print $} '
Res= ' echo ' $BMEM > $CRI ' |/USR/BIN/BC '
If ["$RES"-eq 1];then
echo "Critical-pid: $ID Memory usage = $BMEM% [" $MMEM "B]. OS free memory= "$OSM" mb| Used= "$MMEM" B; " $MIN "MB;" $MAX "MB;0;" $TOTAL "MB"
Exit $CR
Fi
Res= ' echo ' $BMEM > $WAR ' |/USR/BIN/BC '
If ["$RES"-eq 1];then
echo "Warning-pid: $ID Memory usage = $BMEM% [" $MMEM "B]. OS free memory= "$OSM" mb| Used= "$MMEM" B; " $MIN "MB;" $MAX "MB;0;10877MB"
Exit $WA
Else
echo "Ok-pid: $ID Memory usage = $BMEM% [" $MMEM "B]. OS free memory= "$OSM" mb| Used= "$MMEM" B; " $MIN "MB;" $MAX "MB;0;10877MB"
Exit $OK
Fi
Fi
Help
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# #能不能吐槽一下这个代码编辑器???
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The test uses the following:

./check_mem_pid.sh-p/var/run/hadoop/hdfs/hadoop-hdfs-namenode.pid-w 80-c
ok-pid:5534 Memory usage = 6.6% [720 MB]. OS Free memory=9179mb| Used=720mb;9789mb;8701mb;0;10877mb

#-W refers to the warning ratio of memory usage,--------critical, the 10th column field of the specified PID that is out of the size of top-bn 1

Deficiencies, please correct ...

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Yesterday, colleagues made a point to say whether the process can be given the size of memory, in the range of available monitoring, so, today again modified, in the Nagios server implementation, the results are as follows:

#/usr/lib64/nagios/plugins/check_nrpe-h Node63-c check_test-a/var/run/hadoop/hdfs/hadoop-hdfs-namenode.pid 80 90 2048
OK-719.59MB/2048MB. (35.14% used) | USED=35.14%;1843MB;1638MB;0;2048MB
# The first parameter is the process PID file, the second is the warning alarm value, the second critical alarm value (85 is to start the alarm with 85), The last one to allocate the total amount of memory, in megabytes, to the listener's target process.

Local execution is done directly using the following script:

#./check_mem_pid.sh-p/var/run/hadoop/hdfs/hadoop-hdfs-namenode.pid-w 30-c 40-t 2048 warning-719.53mb/2048mb
. (35.13% used) | Used=35.13%;1843mb;1638mb;0;2048mb

The code is no longer listed, directly uploaded to the attachment (with Nagios related use configuration document Oh, pro), interested students download ha.