nodes2grafana/etc/nodes2prometheus.sh.in

#!/bin/sh

# Einzeldaten und Summen von nodes.json als labeled metrics for prometheus

ME="`basename $0`"

PROM_PREFIX=%%PROM_PREFIX%%
PROMDIR=%%EXPORT_DIR%%
[ -d $PROMDIR -a -w $PROMDIR ] || PROMDIR=/tmp
PROMFILE=$PROMDIR/$PROM_PREFIX.prom

NODES_URL="%%NODES_URL%%"
NODESFILE=/tmp/nodes.json.$$
NODES2PROM=%%BIN_DIR%%/nodes2prom
[ -f $NODES2PROM -a -x $NODES2PROM ] || NODES2PROM=./nodes2prom

if timeout -s HUP -k 2 50 \
   %%FETCH_CMD%% $NODESFILE "$NODES_URL"
then
	$NODES2PROM $NODESFILE > $PROMFILE.new && \
	mv $PROMFILE.new $PROMFILE
	rm -f $NODESFILE
else
	logger -t "$ME" "failed to fetch $NODES_URL"
	rm -f $NODESFILE
	exit 1
fi