Cloudflare Tunnels metrics display

check_metrics.sh

#!/bin/bash

# Fetch metrics
metrics=$(curl -s http://127.0.0.1:60123/metrics)

# Define the metrics to be displayed
metric_names=(
  "cloudflared_tcp_active_sessions"
  "cloudflared_tunnel_active_streams"
  "cloudflared_tunnel_ha_connections"
  "cloudflared_tunnel_total_requests"
  "cloudflared_tunnel_request_errors"
  "cloudflared_tunnel_tunnel_authenticate_success"
  "cloudflared_tunnel_tunnel_register_success"
  "cloudflared_udp_active_sessions"
  "cloudflared_udp_total_sessions"
  "coredns_panics_total"
  "go_goroutines"
  "go_memstats_alloc_bytes"
  "process_resident_memory_bytes"
  "process_virtual_memory_bytes"
  "process_cpu_seconds_total"
)

# Print header
echo -e "\e[1mMetric\t\t\t\tValue\e[0m"
echo "-----------------------------------------"

# Function to color values based on conditions
colorize_value() {
  local metric=$1
  local value=$2
  case $metric in
    cloudflared_tunnel_request_errors|coredns_panics_total)
      [ "$value" -gt 0 ] && echo -e "\e[31m$value\e[0m" && return
      ;;
    go_goroutines)
      [ "$value" -gt 100 ] && echo -e "\e[33m$value\e[0m" && return
      ;;
    process_cpu_seconds_total)
      [ "$(echo "$value > 1.0" | bc -l)" -eq 1 ] && echo -e "\e[33m$value\e[0m" && return
      ;;
  esac
  echo "$value"
}

# Filter and format metrics
for metric in "${metric_names[@]}"; do
  value=$(echo "$metrics" | grep "^$metric " | awk '{print $2}')
  if [ -z "$value" ]; then
    value="N/A"
  fi
  colored_value=$(colorize_value "$metric" "$value")
  printf "%s\t\t%s\n" "$metric" "$colored_value"
done