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Fix sensu-plugin-memory-check in Amazon Linux
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| #!/bin/bash | |
| # What Is This: | |
| # ------------- | |
| # In https://github.com/sensu-plugins/sensu-plugins-memory-checks/tree/master/bin | |
| # you can see that sensu is using ( $ free -m ) to check memory | |
| # code: | |
| # FreeMem=$(free -m | grep buffers/cache | awk '{ print $4 }') | |
| # if [ $? -ne 0 ]; then | |
| # FreeMem=$(free -m | grep Mem | awk '{ print $7 }') | |
| # fi | |
| # and since Amazon Linux uses old version of free command ( 3.2.8 ) it has no availabe mem info, so | |
| # it reads the free column which is totally wrong and keeps sending alert | |
| # This script override free command in away to have the new version of free output | |
| # How To Deploy: | |
| # -------------- | |
| # $ mv /usr/bin/free /usr/bin/ofree | |
| # $ cp this_file /usr/bin/free | |
| # $ chmod +x /usr/bin/free | |
| os=$(uname) | |
| free_version=$(ofree -V | awk '{ print $NF }' ) | |
| verlte() { | |
| [ "$1" = "`echo -e "$1\n$2" | sort -V | head -n1`" ] | |
| } | |
| verlt() { | |
| [ "$1" = "$2" ] && return 1 || verlte $1 $2 | |
| } | |
| verlt $free_version 3.3.0 && { | |
| # Less than 3.3.0 | |
| tabs 4 | |
| echo -e "\t\ttotal\tused\tfree\tshared\tbuff/cache\tavailable" | |
| ofree "$@" | grep Mem | awk '{ | |
| print "Mem:","\t",$2,"\t",$3,"\t",$4,"\t",$5,"\t",$5+$6,"\t",$5+$6-$4 | |
| }' | |
| ofree "$@" | grep Swap | awk '{ | |
| print "Swap:","\t",$2,"\t",$3,"\t",$4 | |
| }' | |
| } || { | |
| # More than 3.3.0 | |
| ofree "$@" | |
| } |
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