collect-ifstat.linux-procfs.sh

#!/bin/sh

# Copyright 2015-2020 Rivoreo

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# without limitation the rights to use, copy, modify, merge, publish,
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# the following conditions:

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if [ -z "${PROGRAM_DIR+set}" ]; then
	echo "You should not run this script directly" 1>&2
	exit 255
fi

[ -n "$LINPROCFS" ] && [ -f "$LINPROCFS/net/dev" ] && proc_net_dev_file="$LINPROCFS/net/dev" || proc_net_dev_file=/proc/net/dev
count=0
while true; do
	line_count=0
	while read line; do
		line_count=$((line_count+1))
		[ $line_count -lt 3 ] && continue
		set -- $line
		if [ $# != 17 ]; then
			echo "data error: # $# != 17" 1>&2
			continue
		fi
		ifname="${1%:}"
		[ "$ifname" = lo ] && continue
		e_ifname="`printf %s \"$ifname\" | sed -r 's/[.-]/_/g'`"
		eval "last_rx=\$last_rx_$e_ifname"
		eval "last_tx=\$last_tx_$e_ifname"
		if [ -n "$last_rx" ] && [ -n "$last_tx" ]; then
			rx_diff=$((${2}-last_rx))
			tx_diff=$((${10}-last_tx))
			[ "$rx_diff" -lt 0 ] && rx_diff=0
			[ "$tx_diff" -lt 0 ] && tx_diff=0
			if [ $INTERVAL -gt 1 ]; then
				rx_diff=$((rx_diff/INTERVAL))
				tx_diff=$((tx_diff/INTERVAL))
			fi
			if [ -n "$INFLUXDB_BASE_URL" ]; then
				http_post "${INFLUXDB_BASE_URL}write?db=$INFLUXDB_DB_NAME" \
					"traffic,host=$HOSTNAME,interface=$ifname receive_rate=$rx_diff,transmit_rate=$tx_diff"
			fi
			if [ -n "$CARBON_SERVER" ]; then
				printf '%s\n%s\n' \
					"traffic.$HOSTNAME.$ifname.receive_rate $rx_diff -1" \
					"traffic.$HOSTNAME.$ifname.transmit_rate $tx_diff -1"
			fi
		fi
		eval "last_rx_$e_ifname=${2}"
		eval "last_tx_$e_ifname=${10}"
	done < "$proc_net_dev_file"
	sleep $INTERVAL
done | send_carbon_lines