chiefgeek
a1a17e81a1
Includes updated JS challenge scripts with Claude-User whitelist, same-site referer bypass, Blackbox-Exporter allowed bot, and all new exporters, cheat sheets, and automation scripts.
261 lines
7.5 KiB
Bash
261 lines
7.5 KiB
Bash
#!/bin/bash
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#############################################################
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#### Nagios to Prometheus Bridge ####
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#### Run Nagios check plugins and convert output to ####
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#### Prometheus textfile collector format ####
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#### ####
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#### Author: Phil Connor ####
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#### Contact: contact@mylinux.work ####
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#### License: MIT ####
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#### Version: 1.0 ####
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#### ####
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#### Usage: ./nagios-to-prometheus-bridge.sh [OPTIONS] ####
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#############################################################
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#
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# Converts Nagios plugin output (exit codes + performance data)
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# into Prometheus .prom files for the node_exporter textfile collector.
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#
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# Metrics generated:
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# - nagios_check_status (exit code: 0=OK, 1=WARNING, 2=CRITICAL, 3=UNKNOWN)
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# - nagios_check_duration_seconds (execution time)
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# - nagios_check_last_run_timestamp (unix timestamp)
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# - nagios_check_perfdata_<label> (one gauge per performance data label)
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#
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# Requirements:
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# - Bash 4.0+
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# - Standard Linux utilities (grep, awk, sed, bc)
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# - The target Nagios plugin must be installed and executable
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#
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set -euo pipefail
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#########################
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### Configuration ###
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#########################
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NODE_DIR="${NODE_DIR:-/var/lib/node_exporter}"
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METRIC_PREFIX="${METRIC_PREFIX:-nagios_check}"
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DEBUG="${DEBUG:-}"
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PLUGIN_CMD=""
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CHECK_NAME=""
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OUTPUT_FILE=""
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#########################
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### Logging ###
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#########################
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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NC='\033[0m'
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log_info() {
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echo -e "${GREEN}[INFO]${NC} $1" >&2
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}
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log_warn() {
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echo -e "${YELLOW}[WARN]${NC} $1" >&2
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}
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log_error() {
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echo -e "${RED}[ERROR]${NC} $1" >&2
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}
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log_debug() {
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[[ -n "$DEBUG" ]] && echo "[DEBUG] $1" >&2
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}
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#########################
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### Parse Arguments ###
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#########################
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show_help() {
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cat <<EOF
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Nagios to Prometheus Bridge
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Runs a Nagios check plugin and converts its output to Prometheus
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textfile collector format (.prom file).
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Usage: $0 [OPTIONS]
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OPTIONS:
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--plugin "COMMAND" Nagios plugin command to execute (required)
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--name NAME Check name for metric labels (required)
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--output PATH Output .prom file path (default: <NODE_DIR>/<name>.prom)
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--help Show this help
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ENVIRONMENT:
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NODE_DIR Textfile collector directory (default: /var/lib/node_exporter)
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METRIC_PREFIX Metric name prefix (default: nagios_check)
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DEBUG Enable debug output if set
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EXAMPLES:
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$0 --plugin "/usr/lib/nagios/plugins/check_disk -w 20% -c 10% -p /" --name check_disk_root
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$0 --plugin "/usr/local/nagios/libexec/check_memory -w 80 -c 90" --name check_memory
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$0 --plugin "/usr/lib/nagios/plugins/check_http -H example.com -S -C 30" --name check_ssl --output /tmp/ssl.prom
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EOF
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exit 0
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}
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parse_args() {
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while [[ $# -gt 0 ]]; do
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case "$1" in
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--plugin) PLUGIN_CMD="$2"; shift 2 ;;
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--name) CHECK_NAME="$2"; shift 2 ;;
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--output) OUTPUT_FILE="$2"; shift 2 ;;
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--help) show_help ;;
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*) log_error "Unknown option: $1"; exit 1 ;;
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esac
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done
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if [[ -z "$PLUGIN_CMD" ]]; then
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log_error "Missing required option: --plugin"
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exit 1
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fi
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if [[ -z "$CHECK_NAME" ]]; then
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log_error "Missing required option: --name"
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exit 1
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fi
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if [[ -z "$OUTPUT_FILE" ]]; then
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OUTPUT_FILE="${NODE_DIR}/${CHECK_NAME}.prom"
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fi
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}
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#########################
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### Metric Helpers ###
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#########################
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sanitize_name() {
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local name="$1"
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name="${name,,}" # lowercase
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name="${name// /_}" # spaces to underscores
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name=$(echo "$name" | sed 's/[^a-z0-9_]/_/g') # remove invalid chars
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name=$(echo "$name" | sed 's/__*/_/g') # collapse multiple underscores
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name=$(echo "$name" | sed 's/^_//; s/_$//') # trim leading/trailing underscores
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echo "$name"
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}
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strip_unit() {
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local value="$1"
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# Remove common unit suffixes (MB, GB, KB, %, s, ms, us, B, etc.)
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value=$(echo "$value" | sed 's/[a-zA-Z%]*$//')
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echo "$value"
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}
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#########################
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### Execute Plugin ###
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#########################
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run_plugin() {
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log_debug "Executing: $PLUGIN_CMD"
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local start_time end_time duration
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local plugin_output=""
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local exit_code=0
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start_time=$(date +%s%N)
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# Run the plugin command, capturing output and exit code
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plugin_output=$(eval "$PLUGIN_CMD" 2>&1) || exit_code=$?
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end_time=$(date +%s%N)
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duration=$(echo "scale=3; ($end_time - $start_time) / 1000000000" | bc 2>/dev/null || echo "0")
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log_debug "Exit code: $exit_code"
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log_debug "Output: $plugin_output"
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log_debug "Duration: ${duration}s"
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# Build metrics output
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local metrics=""
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local timestamp
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timestamp=$(date +%s)
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# Status metric
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metrics+="# HELP ${METRIC_PREFIX}_status Nagios check exit code (0=OK 1=WARNING 2=CRITICAL 3=UNKNOWN)
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# TYPE ${METRIC_PREFIX}_status gauge
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${METRIC_PREFIX}_status{check=\"${CHECK_NAME}\"} ${exit_code}
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"
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# Duration metric
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metrics+="# HELP ${METRIC_PREFIX}_duration_seconds Time taken to execute the check
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# TYPE ${METRIC_PREFIX}_duration_seconds gauge
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${METRIC_PREFIX}_duration_seconds{check=\"${CHECK_NAME}\"} ${duration}
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"
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# Last run timestamp
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metrics+="# HELP ${METRIC_PREFIX}_last_run_timestamp Unix timestamp of last check execution
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# TYPE ${METRIC_PREFIX}_last_run_timestamp gauge
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${METRIC_PREFIX}_last_run_timestamp{check=\"${CHECK_NAME}\"} ${timestamp}
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"
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# Parse performance data
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local perfdata=""
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if echo "$plugin_output" | grep -q '|'; then
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perfdata=$(echo "$plugin_output" | sed 's/^[^|]*|//' | sed 's/^ *//')
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log_debug "Perfdata raw: $perfdata"
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fi
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if [[ -n "$perfdata" ]]; then
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# Parse each perfdata item: label=value;warn;crit;min;max
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local item label raw_value value metric_name
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for item in $perfdata; do
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[[ "$item" == *"="* ]] || continue
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label="${item%%=*}"
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raw_value="${item#*=}"
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# Extract the value (first field before semicolons)
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value="${raw_value%%;*}"
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# Strip quotes from label
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label="${label//\'/}"
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label="${label//\"/}"
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# Strip unit suffix from value
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value=$(strip_unit "$value")
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# Validate value is numeric
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if ! echo "$value" | grep -qE '^-?[0-9]*\.?[0-9]+$'; then
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log_debug "Skipping non-numeric perfdata: $label=$value"
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continue
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fi
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metric_name=$(sanitize_name "$label")
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metrics+="# HELP ${METRIC_PREFIX}_perfdata_${metric_name} Performance data: ${label}
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# TYPE ${METRIC_PREFIX}_perfdata_${metric_name} gauge
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${METRIC_PREFIX}_perfdata_${metric_name}{check=\"${CHECK_NAME}\"} ${value}
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"
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done
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fi
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# Atomic write: write to temp file then move
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local tmpfile
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tmpfile=$(mktemp "${OUTPUT_FILE}.XXXXXX")
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echo "$metrics" > "$tmpfile"
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mv "$tmpfile" "$OUTPUT_FILE"
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log_info "Metrics written to ${OUTPUT_FILE} (exit_code=${exit_code}, perfdata_items=$(echo "$perfdata" | wc -w))"
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}
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#########################
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### Main ###
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#########################
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main() {
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parse_args "$@"
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# Ensure output directory exists
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local output_dir
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output_dir=$(dirname "$OUTPUT_FILE")
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mkdir -p "$output_dir"
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run_plugin
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}
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main "$@"
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