/
docker_checks
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/
docker_checks
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#!/bin/bash
#
# -------------------------------------- Description ---------------------------------------------------
#
# Monitoring Docker CPU / MEM / Network / Status
# Usage example :
# ./check_docker.sh -n <container name> -c <PERC_WARNING_CPU>,<PERC_CRITCAL_CPU>
# ./check_docker.sh -n <container name> -m <PERC_WARNING_MEM>,<PERC_CRITICAL_MEM>
#
# ------------------------------------- Requierements --------------------------------------------------
#
# Please add nagios user in group Docker -> usermod -aG docker ${USER}
# If nagios have shell "/bin/false" -> chsh -s /bin/bash ${USER}
# Minimum Docker version -> 1.10.0
#
# ---------------------------------------- License -----------------------------------------------------
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# contribute to https://github.com/jryberg
#----------------------------------------------------------------------------------------------------------
VERSION="Version 0.1"
AUTHOR="2019 by janlueders"
STATE_OK=0
STATE_WARN=1
STATE_CRIT=2
## PRINT VERSION #
function version {
echo "$VERSION"
}
## Container exists ##
function dockerexist () {
dckname="$1"
container=`docker stats --no-stream | grep $dckname`
if [ ! -z "$container" ]
then
echo "true"
fi
}
function print_help {
echo "Usage: ./check_docker.sh [-v] [-h] [-n [-s -c -m -ir -iw -nu -nd]]
-h, --help
print this help message
-v, --version
print version program
-n, --name
name docker to check
-c, --cpulimit PERC_WARNING_CPU,PERC_CRITCAL_CPU
number in percent alert for CPU
-m, --memlimit PERC_WARNING_MEM,PERC_CRITICAL_MEM
number in percent alert for MEM usage
-ir, --ioread MB_WARNING_IO_READ,MB_CRITICAL_IO_READ
the I/O Read with waring and critial in MB
-iw, --iowrite MB_WARNING_IO_WRITE,MB_CRITICAL_IO_WRITE
the I/O Write with warning and critical in MB
-s, --status
check if docker is alive
-nu, --netupload GB_WARNING_UPLOAD,GB_CRITICAL_UPLOAD
number in gb alert for upload
-nd, --netdownload GB_WARNING_DOWNLOAD,GB_CRITICAL_DOWNLOAD"
}
function getstats () {
local typestats="$1"
local cid="$2"
case "$typestats" in
CPUUsage)
currentstats=`docker stats --no-stream | grep $cid | awk '{print $3}'`
;;
IORead)
currentstats=`docker stats --no-stream | grep $cid | awk '{print $11}'`
;;
IOWrite)
currentstats=`docker stats --no-stream | grep $cid | awk '{print $13}'`
;;
Upload)
currentstats=`docker stats --no-stream | grep $cid | awk '{print $10}'`
;;
Download)
currentstats=`docker stats --no-stream | grep $cid | awk '{print $8}'`
;;
MemUsage)
currentstats=`docker stats --no-stream | grep $cid | awk '{print $7}'`
;;
*)
echo "Unknown argument: $typestats"
exit $STATE_UNKN
;;
esac
echo "$currentstats"
}
function monitorperc () {
local typestats="$1"
local arg_limit="$2"
local shortid="$3"
formatreg='^[0-9.]{1,5},[0-9.]{1,5}$'
if [[ $arg_limit =~ $formatreg ]]
then
valcurrentp=$(getstats $typestats $shortid)
vallimitwarn=`echo "$arg_limit" | awk '{split($0,a,","); print a[1]}'`
vallimitcrit=`echo "$arg_limit" | awk '{split($0,a,","); print a[2]}'`
valcurrent=${valcurrentp::-1}
valcur=`echo "${valcurrentp//i}"`
lowercase_current_val=`echo "$typestats" | awk '{print tolower($0)}'`
valcur=`echo "$valcur" | awk '{print tolower($0)}'`
if (( $(echo "$valcurrent > $vallimitcrit" |bc -l) ))
then
echo ", CRITICAL - $typestats: $valcurrentp|$lowercase_current_val=$valcur;$vallimitwarn;$vallimitcrit;;"
elif (( $(echo "$valcurrent > $vallimitwarn" |bc -l) ))
then
echo "WARNING - $typestats: $valcurrentp|$lowercase_current_val=$valcur;$vallimitwarn;$vallimitcrit;;"
else
echo "OK - $typestats $valcurrentp|$lowercase_current_val=$valcur;$vallimitwarn;$vallimitcrit;;"
fi
else
echo "Value $arg_limit malformed, please show --help"
fi
}
arg_containername=""
arg_cpulimitperc=""
arg_memlimitperc=""
arg_ioread=""
arg_iowrite=""
arg_netupload=""
arg_netdownload=""
arg_checkstatus=""
while test -n "$1"; do
case "$1" in
-h|--help)
print_help
exit "$STATE_OK"
;;
-v|--version)
print_version
exit "$STATE_OK"
;;
-n|--name)
arg_containername=$2
shift
;;
-c|--cpulimitperc)
arg_cpulimitperc=$2
shift
;;
-m|--memlimitperc)
arg_memlimitperc=$2
shift
;;
-ir|--ioread)
arg_ioread=$2
shift
;;
-iw|--iowrite)
arg_iowrite=$2
shift
;;
-nu|--netupload)
arg_netupload=$2
shift
;;
-nd|--netdownload)
arg_netdownload=$2
shift
;;
-s|--status)
arg_checkstatus="true"
;;
*)
echo "Unknown argument: $1"
print_help
exit $STATE_CRIT
;;
esac
shift
done
valid_version=0
version_docker=`docker --version | awk '{split($0,a,","); print a[1]}' | sed "s/Docker version //g"`
major_param=`echo "$version_docker" | awk '{split($0,a,"."); print a[1]}'`
minor_param=`echo "$version_docker" | awk '{split($0,a,"."); print a[2]}'`
if [ "$major_param" -ge "1" ] && [ "$minor_param" -ge "13" ]
then
valid_version=1
elif [ "$major_param" -ge "1" ] && [ "$minor_param" -ge "10" ]
then
valid_version=0
elif [ "$major_param" -ge "1" ]
then
valid_version=1
else
echo "Docker version must be higher 1.10.0 for use this plugin"
exit $STATE_CRIT
fi
if [ ! -z $arg_containername ]
then
is_docker=$(dockerexist $arg_containername)
if [[ $is_docker == "true" ]]
then
statscpu="CPUUsage"
statsmemu="MemUsage"
statsioread="Read"
statsiowrite="Write"
statsupload="Upload"
statdownload="Download"
if [[ $arg_checkstatus == "true" ]]
then
metricval=" running|running=1;0;0;;"
fi
if [ ! -z $arg_cpulimitperc ]
then
metricval=`echo "$(monitorperc $statscpu $arg_cpulimitperc $arg_containername)"`
fi
if [ ! -z $arg_memlimitperc ]
then
metricval=`echo "$(monitorperc $statsmemu $arg_memlimitperc $arg_containername)"`
fi
if [ ! -z $arg_ioread ]
then
metricval=`echo "$(monitorperc $statsioread $arg_ioread $arg_containername)"`
fi
if [ ! -z $arg_iowrite ]
then
metricval=`echo "$(monitorperc $statsiowrite $arg_iowrite $arg_containername)"`
fi
if [ ! -z $arg_netupload ]
then
metricval=`echo "$(monitorperc $statsupload $arg_netupload $arg_containername)"`
fi
if [ ! -z $arg_netdownload ]
then
metricval=`echo "$(monitorperc $statsdownload $arg_netdownload $arg_containername)"`
fi
else
echo "Docker not running or not exist"
exit $STATE_CRIT
fi
if [[ $metricval == *"CRITICAL"* ]]
then
echo "${metricval}"
exit $STATE_CRIT
elif [[ $metricval == *"WARNING"* ]]
then
echo "${metricval}"
exit $STATE_WARN
else
echo "${metricval}"
exit $STATE_OK
fi
else
echo "Docker Name required"
exit $STATE_CRIT
fi