nodes2grafana/etc/nodes2prometheus.sh.in

#!/bin/sh

# Einzeldaten und Summen von nodes.json sowie Verbindungsdaten aus graph.json
# als labeled metrics fuer prometheus

ME="`basename $0`"

PROMDIR=%%EXPORT_DIR%%
[ -d $PROMDIR -a -w $PROMDIR ] || PROMDIR=/tmp

NODES_PROM=$PROMDIR/%%PROM_PREFIX%%.prom
NODES_URL="%%NODES_URL%%"
NODES_FILE=/tmp/nodes.json.$$
NODES2PROM=%%BIN_DIR%%/nodes2prom
[ -f $NODES2PROM -a -x $NODES2PROM ] || NODES2PROM=./nodes2prom

GRAPH_PROM=$PROMDIR/%%PROM_GRAPH_PREFIX%%.prom
GRAPH_URL="%%GRAPH_URL%%"
GRAPH_FILE=/tmp/graph.json.$$
GRAPH2PROM=%%BIN_DIR%%/graph2prom
[ -f $GRAPH2PROM -a -x $GRAPH2PROM ] || GRAPH2PROM=./graph2prom

result=0

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

if timeout -s HUP -k 2 50 \
   %%FETCH_CMD%% $GRAPH_FILE "$GRAPH_URL"
then
	$GRAPH2PROM $GRAPH_FILE > $GRAPH_PROM.new && \
	mv $GRAPH_PROM.new $GRAPH_PROM
	rm -f $GRAPH_FILE
else
	logger -t "$ME" "failed to fetch $GRAPH_URL"
	rm -f $GRAPH_FILE
	result=1
fi

return $result