#!/bin/bash
# ABOUT docker for zabbix
# author mikedmorto 2021 year
export LC_ALL=""
export LANG="en_US.UTF-8"
version="0.4"
DOCKER="/usr/bin/docker"

JSON=""
#### PARAMETRS ####
METRIC="$1"
ITEM="$2"

case "$METRIC" in
discovery)

JSON="{ \"data\":["
DCLIST=""


# get all docker containers list of id
DCLIST=`${DOCKER} ps -a | tail -n +2 | awk '{print $1}'`


# show all docker id
for DOCKERID in ${DCLIST}; do
	JSON=${JSON}" {\"{#DOCKERID}\":\"${DOCKERID}\"},"
done


JSON=${JSON::-1}
JSON=${JSON}"]}"
echo ${JSON}
exit 0
;;

# get container status
docker.container_running)

RET=`${DOCKER} ps -a | tail -n +2 | awk -v IT="${ITEM}" ' BEGIN {$count=0;} { if ($1 == IT && $7 == "Up") count += 1 } END {if (count > 1) print ""; else if (count == 1) print 1; else if (count == 0) print 0} '`
	echo ${RET}


	exit 0
;;


#get cpu usage
docker.cpu)

RET=`${DOCKER} stats --no-stream | tail -n +2 | awk -v IT="${ITEM}" ' BEGIN {$count=0;} {if ($1 == IT) count += 1} END {if (count > 1) print ""; else if (count == 1) print $3; else if (count == 0) print 0} '`
	echo ${RET}

	exit 0
;;


#get ram usage
docker.ram)

RET=`${DOCKER} stats --no-stream | tail -n +2 | awk -v IT="${ITEM}" ' BEGIN {$count=0;} {if ($1 == IT) count += 1} END {if (count > 1) print ""; else if (count == 1) print ($4*1024); else if (count == 0) print 0} '`
        echo ${RET}

        exit 0


;;

script.version)

      echo ${version}
	
      exit 0
;;

help)
echo "please use these parametrs
{
discovery
docker.container_running
docker.cpu
docker.ram
script.version
}"
;;
*)
	echo ""
;;
esac