Moved to a new, package based installation method. Also added a few more support files.

files/boot/config/plugins/zabbix_agent/zabbix_agentd.conf

@@ -0,0 +1,29 @@
+Server=0.0.0.0/0
+LogType=system
+AllowRoot=1
+StartAgents=1
+
+DenyKey=system.run[*]
+AllowKey=agent.*
+AllowKey=net.if.*
+AllowKey=net.if.*[*]
+AllowKey=proc.*
+AllowKey=proc.*[*]
+AllowKey=sensor[*]
+AllowKey=system.*
+AllowKey=system.*[*]
+AllowKey=vfs.dev.*
+AllowKey=vfs.dev.*[*]
+AllowKey=vfs.fs.*
+AllowKey=vfs.fs.*[*]
+AllowKey=vm.memory.size[*]
+AllowKey=unraid.*
+AllowKey=unraid.*[*]
+
+DenyKey=*
+
+UserParameter=unraid.disks.discovery,/usr/local/emhttp/plugins/zabbix_agent/scripts/disks.discovery.sh
+UserParameter=unraid.disk[*],/usr/local/emhttp/plugins/zabbix_agent/scripts/disk.sh "$1"
+UserParameter=unraid.disks.totals,/usr/local/emhttp/plugins/zabbix_agent/scripts/disks.totals.sh
+UserParameter=unraid.qemu.discovery,/usr/local/emhttp/plugins/zabbix_agent/scripts/qemu.discovery.sh
+UserParameter=unraid.qemu[*],/usr/local/emhttp/plugins/zabbix_agent/scripts/qemu.sh "$1"

files/etc/rc.d/rc.zabbix_agentd

@@ -0,0 +1,48 @@
+#!/bin/sh
+#
+# rc.zabbix_agentd      This shell script takes care of starting and stopping
+#               the Zabbix agent
+
+OPTIONS="-c /boot/config/plugins/zabbix_agent/zabbix_agentd.conf"
+
+start() {
+        if [ -x /usr/sbin/zabbix_agentd ]; then
+                echo -n "Starting zabbix_agentd: "
+                /usr/sbin/zabbix_agentd $OPTIONS
+                echo " /usr/sbin/zabbix_agentd $OPTIONS"
+        fi
+}
+
+stop() {
+        # Stop daemons.
+        COUNT=0
+        echo -n "Shutting down zabbix_agentd: "
+        while `killall zabbix_agentd 2>/dev/null`; do
+                echo -n "."
+                sleep 1
+                COUNT=$((COUNT+1))
+                if [ $COUNT -ge 30 ]; then
+                        killall -9 zabbix_agentd
+                        sleep 1
+                        break
+                fi
+        done
+        echo " DONE"
+}
+
+# See how we were called.
+case "$1" in
+  start)
+        start
+        ;;
+  stop)
+        stop
+        ;;
+  restart|reload)
+        stop
+        start
+        ;;
+  *)
+        echo $"Usage: $0 {start|stop|restart}"
+        ;;
+esac

files/usr/local/emhttp/plugins/zabbix_agent/README.md

@@ -0,0 +1,5 @@
+**zabbix_agent**
+
+This plugin installs and configures zabbix_agentd which can be used to monitor this Unraid server using a central Zabbix server.
+
+You can download a matching zabbix template at https://git.schle.nz/fabian/unraid-zabbix_agent/raw/branch/main/zabbix_template.xml

files/usr/local/emhttp/plugins/zabbix_agent/scripts/disk.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+id="$1"
+found=0
+device=""
+
+while read line; do
+	if [[ $line == "["* ]]; then
+		if [ $found = 1 ]; then
+			[ $fsFree -ge 0 ] && [ $fsSize -ge 0 ] && fsUsed=$(( $fsSize - $fsFree ))
+			echo -n '{"device":"'$device'", "name":"'$name'", "status":"'$status'", "temp":'$temp', "size":'$size', "num_reads":'$num_reads', '
+			echo -n '"num_writes":'$num_writes', "num_errors":'$num_errors', "type":"'$type'", "fs_size":'$fsSize', "fs_free":'$fsFree', "fs_used":'$fsUsed', '
+			break
+		else
+			device=''
+			name=''
+			status=''
+			temp=-1
+			size=-1
+			num_reads=-1
+			num_writes=-1
+			num_errors=-1
+			type=""
+			fsSize=-1
+			fsFree=-1
+			fsUsed=-1
+		fi
+	else
+		while IFS="=" read key value; do
+			value="${value%\"}"
+			value="${value#\"}"
+			[ $key = "id" ] && [ "$value" = "$id" ] && found=1
+			[ $key = "device" ] && device="$value"
+			[ $key = "name" ] && name="$value"
+			[ $key = "status" ] && status="$value"
+			[ $key = "temp" ] && [ "$value" != "*" ] && temp="$value"
+			[ $key = "size" ] && size=$(( $value * 1024 ))
+			[ $key = "numReads" ] && num_reads="$value"
+			[ $key = "numWrites" ] && num_writes="$value"
+			[ $key = "numErrors" ] && num_errors="$value"
+			[ $key = "type" ] && type="$value"
+			[ $key = "fsSize" ] && fsSize=$(( $value * 1024 ))
+			[ $key = "fsFree" ] && fsFree=$(( $value * 1024 ))
+		done <<< "$line"
+	fi
+done < <(cat /var/local/emhttp/disks.ini ; echo "[empty]")
+
+if [ $found = 0 ]; then
+	echo "UNSUPPORTED"
+	exit 1
+fi
+
+read bytes_read bytes_written _ < <(grep $device"=" /var/local/emhttp/diskload.ini | cut -d"=" -f2)
+echo '"bytes_reading":'$bytes_read', "bytes_writing":'$bytes_written'}'

files/usr/local/emhttp/plugins/zabbix_agent/scripts/disks.discovery.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+id='""'
+device='""'
+first=1
+
+echo -n '['
+
+while IFS="=" read key value; do
+	if [ "$key" = "id" ] && [ -n "$value" ] && [ "$value" != '""' ]; then
+		[ $first = 0 ] && echo -n ","
+		first=0
+		echo -n '{"{#ID}":'$value'}'
+	fi
+done < /var/local/emhttp/disks.ini
+
+echo ']'

files/usr/local/emhttp/plugins/zabbix_agent/scripts/disks.totals.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+id="$1"
+found=0
+device=""
+
+data_size=0
+data_free=0
+data_used=0
+
+cache_size=0
+cache_free=0
+cache_used=0
+
+while read line; do
+	if [[ $line == "["* ]]; then
+		if [ "$type" = "Cache" ]; then
+			cache_size=$(( $cache_size + $size ))
+			cache_free=$(( $cache_free + $free ))
+		elif [ "$type" = "Data" ]; then
+			data_size=$(( $data_size + $size ))
+			data_free=$(( $data_free + $free ))
+		fi
+		type=""
+		size=0
+		free=0
+	else
+		IFS="=" read key value <<< "$line"
+			value="${value%\"}"
+			value="${value#\"}"
+			[ $key = "type" ] && type="$value"
+			[ $key = "fsSize" ] && size=$(( $value * 1024 ))
+			[ $key = "fsFree" ] && free=$(( $value * 1024 ))
+	fi
+done < <(cat /var/local/emhttp/disks.ini ; echo "[empty]")
+
+echo -n '{"data": {"size":'$data_size ', "free":'$data_free ', "used":'$(( $data_size  - $data_free  ))'},'
+echo    ' "cache":{"size":'$cache_size', "free":'$cache_free', "used":'$(( $cache_size - $cache_free ))'}}'

files/usr/local/emhttp/plugins/zabbix_agent/scripts/qemu.discovery.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+first=1
+
+echo -n "["
+while read name; do
+	[ "$name" = "" ] && continue
+	[ $first = 0 ] && echo -n ","
+	first=0
+	echo -n '{"{#VM}":"'$name'"}'
+done < <(virsh list --name --all)
+echo "]"

files/usr/local/emhttp/plugins/zabbix_agent/scripts/qemu.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+VM="$1"
+
+echo -n '{'
+state=`virsh domstate "$VM"`
+echo -n '"state":"'$state'"'
+if [ "$state" != "running" ]; then
+	echo -n '}'
+	exit
+fi
+
+while IFS=":" read key value; do
+	[ "$key" = "CPU(s)" ] && echo -n ', "cpus":'$value
+	[ "$key" = "CPU time" ] && echo -n ', "cpu_time":'${value%s}
+	[ "$key" = "Max memory" ] && echo -n ', "memory_max":'$((${value%KiB} * 1024))
+	[ "$key" = "Used memory" ] && echo -n ', "memory_used":'$((${value%KiB} * 1024))
+done < <(virsh dominfo "$VM")
+
+while read if key value; do
+	[ "$key" = "rx_bytes" ] && echo -n ', "network_bytes_in":'$value
+	[ "$key" = "tx_bytes" ] && echo -n ', "network_bytes_out":'$value
+done < <(virsh domifstat "$VM" vnet0)
+
+echo "}"