nimbus-eth2/scripts/make_prometheus_config.sh

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#!/usr/bin/env bash
# Copyright (c) 2020 Status Research & Development GmbH. Licensed under
# either of:
# - Apache License, version 2.0
# - MIT license
# at your option. This file may not be copied, modified, or distributed except
# according to those terms.
set -e
####################
# argument parsing #
####################
GETOPT_BINARY="getopt"
if uname | grep -qi darwin; then
# macOS
GETOPT_BINARY=$(find /opt/homebrew/opt/gnu-getopt/bin/getopt /usr/local/opt/gnu-getopt/bin/getopt 2> /dev/null || true)
[[ -f "$GETOPT_BINARY" ]] || { echo "GNU getopt not installed. Please run 'brew install gnu-getopt'. Aborting."; exit 1; }
fi
! ${GETOPT_BINARY} --test > /dev/null
if [ ${PIPESTATUS[0]} != 4 ]; then
echo '`getopt --test` failed in this environment.'
exit 1
fi
OPTS="h"
LONGOPTS="help,nodes:,base-metrics-port:,config-file:"
# default values
NUM_NODES="10"
BASE_METRICS_PORT="8008"
CONFIG_FILE="prometheus.yml"
print_help() {
cat <<EOF
Usage: $(basename $0) --nodes ${NUM_NODES} --base-metrics-port ${BASE_METRICS_PORT} --config-file "${CONFIG_FILE}"
-h, --help this help message
--nodes number of nodes to launch (default: ${NUM_NODES})
--base-metrics-port bootstrap node's metrics server port (default: ${BASE_METRICS_PORT})
--config-file write the Prometheus config to this file (default: ${CONFIG_FILE})
EOF
}
! PARSED=$(${GETOPT_BINARY} --options=${OPTS} --longoptions=${LONGOPTS} --name "$0" -- "$@")
if [ ${PIPESTATUS[0]} != 0 ]; then
# getopt has complained about wrong arguments to stdout
exit 1
fi
# read getopt's output this way to handle the quoting right
eval set -- "$PARSED"
while true; do
case "$1" in
-h|--help)
print_help
exit
;;
-n|--nodes)
NUM_NODES="$2"
shift 2
;;
--base-metrics-port)
BASE_METRICS_PORT="$2"
shift 2
;;
--config-file)
CONFIG_FILE="$2"
shift 2
;;
--)
shift
break
;;
*)
echo "argument parsing error"
print_help
exit 1
esac
done
cat > "${CONFIG_FILE}" <<EOF
global:
scrape_interval: 12s
scrape_configs:
- job_name: "nimbus"
static_configs:
EOF
for NUM_NODE in $(seq 1 $NUM_NODES); do
cat >> "${CONFIG_FILE}" <<EOF
- targets: ['127.0.0.1:$(( BASE_METRICS_PORT + NUM_NODE ))']
EOF
done