Sync all scripts from website downloads — 352 scripts total
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.
This commit is contained in:
Executable
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#!/bin/bash
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################################################################################
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# Script Name: dokku-exporter.sh
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# Version: 1.0
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# Description: Prometheus exporter for Dokku PaaS providing operational
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# metrics via the Dokku CLI — application status, plugin counts,
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# domain configuration, SSL status, and host health
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#
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# Author: Phil Connor
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# Contact: contact@mylinux.work
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# Website: https://mylinux.work
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# License: MIT
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#
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# Prerequisites:
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# - Dokku installed on the local host
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# - Root or dokku user access to run dokku commands
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# - netcat (nc) for HTTP mode
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#
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# Usage:
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# # Output to stdout
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# ./dokku-exporter.sh
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#
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# # HTTP server mode
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# ./dokku-exporter.sh --http -p 9198
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#
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# # Textfile collector mode
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# ./dokku-exporter.sh --textfile
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#
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# Metrics Exported:
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# - dokku_up - Dokku reachability (1=up, 0=down)
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# - dokku_info{version} - Dokku version info
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# - dokku_apps_total - Total app count
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# - dokku_apps_running - Running apps
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# - dokku_apps_stopped - Stopped apps
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# - dokku_plugins_total - Installed plugin count
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# - dokku_domains_app_total - Total app domains configured
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# - dokku_ssl_enabled_total - Apps with SSL enabled
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# - dokku_exporter_duration_seconds - Script execution time
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# - dokku_exporter_last_run_timestamp - Last run timestamp
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#
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# Configuration:
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# Default HTTP port: 9198
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# Textfile directory: /var/lib/node_exporter
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#
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################################################################################
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set -euo pipefail
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# ============================================================================
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# CONFIGURATION VARIABLES
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# ============================================================================
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TEXTFILE_DIR="/var/lib/node_exporter"
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OUTPUT_FILE=""
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HTTP_MODE=false
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HTTP_PORT=9198
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# ============================================================================
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# HELPER FUNCTIONS
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# ============================================================================
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show_usage() {
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cat <<EOF
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Usage: $0 [OPTIONS]
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Export Dokku PaaS statistics as Prometheus metrics via the Dokku CLI.
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MODES:
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--textfile Write to node_exporter textfile collector
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--http Run HTTP server on port $HTTP_PORT
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OPTIONS:
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-p, --port HTTP port (default: 9198)
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-o, --output Output file path
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EXAMPLES:
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$0 --textfile # Write to textfile collector
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$0 --http --port 9198 # Run HTTP server
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$0 # Output to stdout
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$0 -o /tmp/dokku.prom # Write to custom file
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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 $1 in
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-h|--help) show_usage ;;
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--textfile) OUTPUT_FILE="$TEXTFILE_DIR/dokku.prom"; shift ;;
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--http) HTTP_MODE=true; shift ;;
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-p|--port) HTTP_PORT="$2"; shift 2 ;;
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-o|--output) OUTPUT_FILE="$2"; shift 2 ;;
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*) echo "Unknown option: $1" >&2; exit 1 ;;
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esac
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done
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}
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# Check prerequisites
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# Returns: 0 if OK, 1 if error
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check_prerequisites() {
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if ! command -v dokku >/dev/null 2>&1; then
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echo "ERROR: dokku not found" >&2
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return 1
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fi
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return 0
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}
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# Escape special characters in Prometheus label values
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# Args: $1 - string to escape
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# Returns: escaped string safe for Prometheus labels
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prom_escape() {
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local val="$1"
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val="${val//\\/\\\\}"
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val="${val//\"/\\\"}"
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val="${val//$'\n'/}"
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echo "$val"
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}
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# ============================================================================
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# METRIC GENERATION
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# ============================================================================
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# Generate all Prometheus metrics
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# Returns: Prometheus text format metrics on stdout
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generate_metrics() {
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local script_start
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script_start=$(date +%s)
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# Check prerequisites
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if ! check_prerequisites; then
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cat <<EOF
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# HELP dokku_up Dokku reachability (1=up, 0=down)
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# TYPE dokku_up gauge
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dokku_up 0
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EOF
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return
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fi
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# Verify Dokku is responding
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local version_output
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version_output=$(dokku version 2>/dev/null)
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if [ -z "$version_output" ]; then
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cat <<EOF
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# HELP dokku_up Dokku reachability (1=up, 0=down)
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# TYPE dokku_up gauge
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dokku_up 0
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EOF
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return
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fi
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# Extract version string (e.g., "dokku version 0.38.0" -> "0.38.0")
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local dokku_version
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dokku_version=$(echo "$version_output" | awk '{print $NF}')
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if [ -z "$dokku_version" ]; then
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cat <<EOF
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# HELP dokku_up Dokku reachability (1=up, 0=down)
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# TYPE dokku_up gauge
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dokku_up 0
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EOF
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return
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fi
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cat <<EOF
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# HELP dokku_up Dokku reachability (1=up, 0=down)
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# TYPE dokku_up gauge
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dokku_up 1
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EOF
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echo ""
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# ========================================================================
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# VERSION INFO
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# ========================================================================
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cat <<EOF
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# HELP dokku_info Dokku version information
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# TYPE dokku_info gauge
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dokku_info{version="$(prom_escape "$dokku_version")"} 1
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EOF
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echo ""
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# ========================================================================
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# APPLICATION METRICS
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# ========================================================================
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local apps_list
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apps_list=$(dokku --quiet apps:list 2>/dev/null || true)
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local total_apps=0
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local running_apps=0
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local stopped_apps=0
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if [ -n "$apps_list" ]; then
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total_apps=$(echo "$apps_list" | wc -l)
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total_apps=${total_apps:-0}
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# Count running apps by checking each app's process status
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while IFS= read -r app; do
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local ps_running
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ps_running=$(dokku ps:report "$app" --ps-running 2>/dev/null || echo "false")
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if [ "$ps_running" = "true" ]; then
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running_apps=$((running_apps + 1))
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fi
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done <<< "$apps_list"
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stopped_apps=$((total_apps - running_apps))
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fi
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cat <<EOF
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# HELP dokku_apps_total Total number of apps
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# TYPE dokku_apps_total gauge
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dokku_apps_total $total_apps
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# HELP dokku_apps_running Running apps
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# TYPE dokku_apps_running gauge
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dokku_apps_running $running_apps
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# HELP dokku_apps_stopped Stopped apps
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# TYPE dokku_apps_stopped gauge
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dokku_apps_stopped $stopped_apps
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EOF
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echo ""
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# ========================================================================
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# PLUGIN METRICS
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# ========================================================================
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local plugins_count=0
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plugins_count=$(dokku plugin:list 2>/dev/null | wc -l)
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plugins_count=${plugins_count:-0}
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cat <<EOF
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# HELP dokku_plugins_total Installed plugins
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# TYPE dokku_plugins_total gauge
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dokku_plugins_total $plugins_count
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EOF
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echo ""
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# ========================================================================
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# DOMAIN METRICS
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# ========================================================================
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local total_domains=0
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if [ -n "$apps_list" ]; then
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while IFS= read -r app; do
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local app_domains
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app_domains=$(dokku domains:report "$app" --domains-app-vhosts 2>/dev/null || true)
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if [ -n "$app_domains" ]; then
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# Domains are space-separated; count words
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local domain_count
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domain_count=$(echo "$app_domains" | wc -w)
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total_domains=$((total_domains + domain_count))
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fi
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done <<< "$apps_list"
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fi
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cat <<EOF
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# HELP dokku_domains_app_total Total app domains configured
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# TYPE dokku_domains_app_total gauge
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dokku_domains_app_total $total_domains
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EOF
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echo ""
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# ========================================================================
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# SSL METRICS
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# ========================================================================
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local ssl_enabled_count=0
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if [ -n "$apps_list" ]; then
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while IFS= read -r app; do
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local ssl_enabled
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ssl_enabled=$(dokku certs:report "$app" --certs-ssl-enabled 2>/dev/null || echo "false")
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if [ "$ssl_enabled" = "true" ]; then
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ssl_enabled_count=$((ssl_enabled_count + 1))
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fi
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done <<< "$apps_list"
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fi
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cat <<EOF
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# HELP dokku_ssl_enabled_total Apps with SSL enabled
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# TYPE dokku_ssl_enabled_total gauge
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dokku_ssl_enabled_total $ssl_enabled_count
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EOF
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echo ""
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# ========================================================================
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# EXPORTER RUNTIME
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# ========================================================================
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local script_end script_duration
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script_end=$(date +%s)
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script_duration=$((script_end - script_start))
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cat <<EOF
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# HELP dokku_exporter_duration_seconds Time to generate all metrics
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# TYPE dokku_exporter_duration_seconds gauge
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dokku_exporter_duration_seconds $script_duration
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# HELP dokku_exporter_last_run_timestamp Unix timestamp of last successful run
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# TYPE dokku_exporter_last_run_timestamp gauge
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dokku_exporter_last_run_timestamp $script_end
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EOF
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echo ""
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}
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# ============================================================================
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# HTTP SERVER MODE
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# ============================================================================
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# Run simple HTTP server using netcat
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# Serves metrics on /metrics endpoint
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run_http_server() {
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echo "Starting Dokku exporter on port $HTTP_PORT..." >&2
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if ! command -v nc >/dev/null 2>&1; then
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echo "ERROR: netcat (nc) required for HTTP mode" >&2
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exit 1
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fi
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# Infinite loop accepting HTTP requests
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while true; do
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{
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read -r request
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# Check if request is for /metrics endpoint
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if [[ "$request" =~ ^GET\ /metrics ]]; then
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echo -e "HTTP/1.1 200 OK\r\nContent-Type: text/plain; version=0.0.4\r\n\r"
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generate_metrics
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else # Serve HTML landing page for other requests
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echo -e "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r"
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cat <<EOF
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<!DOCTYPE html>
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<html>
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<head><title>Dokku Exporter v1.0</title></head>
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<body>
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<h1>Dokku Prometheus Exporter v1.0</h1>
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<p><a href="/metrics">Metrics</a></p>
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<p>Operational metrics from the Dokku CLI.</p>
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</body>
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</html>
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EOF
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fi
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} | nc -l -p "$HTTP_PORT" -q 1 2>/dev/null
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done
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}
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# ============================================================================
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# MAIN EXECUTION
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# ============================================================================
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# Main entry point - routes to appropriate output mode
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main() {
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parse_args "$@"
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if [ "$HTTP_MODE" = true ]; then
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# Run HTTP server (blocks until killed)
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run_http_server
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elif [ -n "$OUTPUT_FILE" ]; then
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# Textfile collector mode: write atomically using temp file
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local output_dir
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output_dir="$(dirname "$OUTPUT_FILE")"
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mkdir -p "$output_dir"
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# Create temp file in SAME directory for atomic rename (same filesystem)
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local temp_file
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temp_file=$(mktemp "${output_dir}/.dokku_metrics.XXXXXX")
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# Generate metrics to temp file
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if ! generate_metrics > "$temp_file" 2>/dev/null; then
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rm -f "$temp_file"
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echo "ERROR: Failed to generate metrics" >&2
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exit 1
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fi
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# Validate: file must exist, have content
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local file_lines
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file_lines=$(wc -l < "$temp_file" 2>/dev/null || echo 0)
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if [ "$file_lines" -lt 10 ]; then
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rm -f "$temp_file"
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echo "ERROR: Metrics file too small ($file_lines lines), keeping previous" >&2
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exit 1
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fi
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# Set permissions before move
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chmod 644 "$temp_file"
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# Atomic rename - no gap where file is missing
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mv -f "$temp_file" "$OUTPUT_FILE"
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echo "Metrics written to $OUTPUT_FILE ($file_lines lines)" >&2
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else
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# Default: output to stdout
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generate_metrics
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fi
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}
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# Execute main function with all script arguments
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main "$@"
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Reference in New Issue
Block a user