100 lines
2.3 KiB
Bash
Executable File
100 lines
2.3 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Copyright (c) 2020-2023 Status Research & Development GmbH. Licensed under
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# either of:
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# - Apache License, version 2.0
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# - MIT license
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# at your option. This file may not be copied, modified, or distributed except
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# according to those terms.
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set -e
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####################
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# argument parsing #
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####################
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GETOPT_BINARY="getopt"
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if uname | grep -qi darwin; then
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# macOS
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# Without the head -n1 constraint, it gets confused by multiple matches
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GETOPT_BINARY=$(find /opt/homebrew/opt/gnu-getopt/bin/getopt /usr/local/opt/gnu-getopt/bin/getopt 2> /dev/null | head -n1 || true)
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[[ -f "$GETOPT_BINARY" ]] || { echo "GNU getopt not installed. Please run 'brew install gnu-getopt'. Aborting."; exit 1; }
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fi
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! ${GETOPT_BINARY} --test > /dev/null
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if [ ${PIPESTATUS[0]} != 4 ]; then
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echo '`getopt --test` failed in this environment.'
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exit 1
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fi
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OPTS="h"
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LONGOPTS="help,nodes:,base-metrics-port:,config-file:"
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# default values
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NUM_NODES="10"
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BASE_METRICS_PORT="8008"
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CONFIG_FILE="prometheus.yml"
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print_help() {
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cat <<EOF
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Usage: $(basename $0) --nodes ${NUM_NODES} --base-metrics-port ${BASE_METRICS_PORT} --config-file "${CONFIG_FILE}"
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-h, --help this help message
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--nodes number of nodes to launch (default: ${NUM_NODES})
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--base-metrics-port bootstrap node's metrics server port (default: ${BASE_METRICS_PORT})
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--config-file write the Prometheus config to this file (default: ${CONFIG_FILE})
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EOF
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}
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! PARSED=$(${GETOPT_BINARY} --options=${OPTS} --longoptions=${LONGOPTS} --name "$0" -- "$@")
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if [ ${PIPESTATUS[0]} != 0 ]; then
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# getopt has complained about wrong arguments to stdout
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exit 1
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fi
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# read getopt's output this way to handle the quoting right
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eval set -- "$PARSED"
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while true; do
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case "$1" in
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-h|--help)
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print_help
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exit
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;;
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-n|--nodes)
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NUM_NODES="$2"
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shift 2
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;;
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--base-metrics-port)
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BASE_METRICS_PORT="$2"
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shift 2
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;;
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--config-file)
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CONFIG_FILE="$2"
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shift 2
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;;
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--)
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shift
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break
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;;
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*)
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echo "argument parsing error"
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print_help
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exit 1
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esac
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done
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cat > "${CONFIG_FILE}" <<EOF
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global:
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scrape_interval: 12s
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scrape_configs:
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- job_name: "nimbus"
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static_configs:
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EOF
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for NUM_NODE in $(seq 1 $NUM_NODES); do
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cat >> "${CONFIG_FILE}" <<EOF
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- targets: ['127.0.0.1:$(( BASE_METRICS_PORT + NUM_NODE ))']
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EOF
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done
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