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DariusIII
541 lines
18 KiB
PHP
541 lines
18 KiB
PHP
<?php
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namespace App\Services;
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use Illuminate\Support\Facades\Redis;
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/**
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* Service for monitoring Redis server status and performance metrics.
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*
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* Provides a modern visual dashboard displaying Redis statistics including
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* memory usage, client connections, performance metrics, and keyspace data.
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*/
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class RedisMonitorService
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{
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// ANSI color codes
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private const RED = "\033[0;31m";
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private const GREEN = "\033[0;32m";
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private const YELLOW = "\033[1;33m";
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private const BLUE = "\033[0;34m";
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private const MAGENTA = "\033[0;35m";
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private const CYAN = "\033[0;36m";
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private const WHITE = "\033[1;37m";
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private const GRAY = "\033[0;90m";
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private const BOLD = "\033[1m";
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private const DIM = "\033[2m";
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private const NC = "\033[0m"; // No Color
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// Box drawing characters
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private const H_LINE = '─';
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private const V_LINE = '│';
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private const TL_CORNER = '┌';
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private const TR_CORNER = '┐';
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private const BL_CORNER = '└';
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private const BR_CORNER = '┘';
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private const T_RIGHT = '├';
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private const T_LEFT = '┤';
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private const CLEAR_EOL = "\033[K";
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protected string $host;
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protected int $port;
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protected int $refreshInterval;
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protected ?string $connection;
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protected int $termWidth;
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protected int $boxWidth;
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protected bool $running = true;
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/**
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* Create a new RedisMonitorService instance.
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*
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* @param string|null $connection Redis connection name (from config/database.php)
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* @param int $refreshInterval Refresh interval in seconds
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*/
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public function __construct(?string $connection = 'default', int $refreshInterval = 30)
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{
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$this->connection = $connection;
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$this->refreshInterval = $refreshInterval;
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// Get connection config
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$config = config("database.redis.{$connection}", config('database.redis.default'));
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$this->host = $config['host'] ?? '127.0.0.1';
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$this->port = (int) ($config['port'] ?? 6379);
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// Get terminal width
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$this->termWidth = $this->getTerminalWidth();
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$this->boxWidth = min($this->termWidth - 2, 100); // Cap at 100 for readability
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}
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/**
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* Get terminal width.
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*/
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protected function getTerminalWidth(): int
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{
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$width = 80;
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if (function_exists('exec')) {
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$output = [];
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@exec('tput cols 2>/dev/null', $output);
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if (! empty($output[0]) && is_numeric($output[0])) {
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$width = (int) $output[0];
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}
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}
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return max($width, 60);
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}
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/**
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* Get Redis INFO data.
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*/
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public function getRedisInfo(): ?array
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{
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try {
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return Redis::connection($this->connection)->info();
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} catch (\Exception $e) {
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return null;
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}
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}
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/**
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* Start the monitor loop.
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*
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* @param callable|null $shouldContinue Optional callback to control loop continuation
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*/
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public function monitor(?callable $shouldContinue = null): void
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{
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// Disable output buffering for immediate display
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while (ob_get_level()) {
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ob_end_flush();
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}
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// Hide cursor
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$this->hideCursor();
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// Setup cleanup handler
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$cleanup = function () {
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$this->showCursor();
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echo self::NC; // Reset colors
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};
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// Register shutdown handler
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register_shutdown_function($cleanup);
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// Handle signals if pcntl is available
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if (function_exists('pcntl_async_signals')) {
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pcntl_async_signals(true);
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}
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if (function_exists('pcntl_signal')) {
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pcntl_signal(SIGINT, function () use ($cleanup) {
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$this->running = false;
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$cleanup();
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exit(0);
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});
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pcntl_signal(SIGTERM, function () use ($cleanup) {
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$this->running = false;
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$cleanup();
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exit(0);
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});
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}
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// Initial clear
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$this->clearScreen();
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while ($this->running) {
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// Check if we should continue
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if ($shouldContinue !== null && ! $shouldContinue()) {
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break;
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}
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// Process signals if available
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if (function_exists('pcntl_signal_dispatch')) {
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pcntl_signal_dispatch();
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}
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// Move cursor to top-left (prevents flicker, better than clearing)
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$this->moveToTop();
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// Get Redis info
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$info = $this->getRedisInfo();
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if ($info === null) {
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$this->displayConnectionError();
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} else {
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$this->displayDashboard($info);
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}
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// Flush output immediately
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if (function_exists('flush')) {
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flush();
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}
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// Sleep in small increments to be responsive to signals
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$sleepTime = $this->refreshInterval;
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while ($sleepTime > 0 && $this->running) {
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sleep(1);
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$sleepTime--;
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// Process signals during sleep
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if (function_exists('pcntl_signal_dispatch')) {
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pcntl_signal_dispatch();
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}
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}
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}
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$cleanup();
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}
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/**
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* Get a single snapshot of Redis stats without entering monitor mode.
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*/
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public function getStats(): array
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{
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$info = $this->getRedisInfo();
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if ($info === null) {
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return [
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'connected' => false,
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'host' => $this->host,
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'port' => $this->port,
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];
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}
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return $this->parseRedisInfo($info);
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}
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/**
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* Parse Redis INFO into structured data.
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*/
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protected function parseRedisInfo(array $info): array
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{
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// Flatten nested arrays if present
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$flatInfo = [];
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foreach ($info as $key => $value) {
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if (is_array($value)) {
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$flatInfo = array_merge($flatInfo, $value);
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} else {
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$flatInfo[$key] = $value;
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}
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}
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// Calculate hit rate
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$hits = (int) ($flatInfo['keyspace_hits'] ?? 0);
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$misses = (int) ($flatInfo['keyspace_misses'] ?? 0);
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$totalOps = $hits + $misses;
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$hitRate = $totalOps > 0 ? round(($hits * 100) / $totalOps, 2) : 0;
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// Parse db keys from all databases
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$dbKeys = 0;
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for ($i = 0; $i <= 15; $i++) {
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$dbKey = "db{$i}";
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if (isset($flatInfo[$dbKey])) {
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$dbValue = $flatInfo[$dbKey];
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if (is_array($dbValue)) {
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// phpredis returns array with 'keys' key
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$dbKeys += (int) ($dbValue['keys'] ?? 0);
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} elseif (is_string($dbValue)) {
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// String format: "keys=123,expires=0,avg_ttl=0"
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if (preg_match('/keys=(\d+)/', $dbValue, $matches)) {
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$dbKeys += (int) $matches[1];
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}
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}
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}
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}
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return [
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'connected' => true,
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'host' => $this->host,
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'port' => $this->port,
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'version' => $flatInfo['redis_version'] ?? 'unknown',
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'uptime_days' => (int) ($flatInfo['uptime_in_days'] ?? 0),
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'uptime_seconds' => (int) ($flatInfo['uptime_in_seconds'] ?? 0),
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'role' => $flatInfo['role'] ?? 'standalone',
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'connected_clients' => (int) ($flatInfo['connected_clients'] ?? 0),
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'blocked_clients' => (int) ($flatInfo['blocked_clients'] ?? 0),
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'total_connections' => (int) ($flatInfo['total_connections_received'] ?? 0),
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'connected_slaves' => (int) ($flatInfo['connected_slaves'] ?? 0),
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'used_memory' => (int) ($flatInfo['used_memory'] ?? 0),
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'used_memory_peak' => (int) ($flatInfo['used_memory_peak'] ?? 0),
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'used_memory_rss' => (int) ($flatInfo['used_memory_rss'] ?? 0),
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'maxmemory' => (int) ($flatInfo['maxmemory'] ?? 0),
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'mem_fragmentation_ratio' => $flatInfo['mem_fragmentation_ratio'] ?? 'N/A',
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'total_commands' => (int) ($flatInfo['total_commands_processed'] ?? 0),
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'ops_per_sec' => (int) ($flatInfo['instantaneous_ops_per_sec'] ?? 0),
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'input_kbps' => (float) ($flatInfo['instantaneous_input_kbps'] ?? 0),
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'output_kbps' => (float) ($flatInfo['instantaneous_output_kbps'] ?? 0),
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'db_keys' => $dbKeys,
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'keyspace_hits' => $hits,
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'keyspace_misses' => $misses,
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'hit_rate' => $hitRate,
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'expired_keys' => (int) ($flatInfo['expired_keys'] ?? 0),
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'evicted_keys' => (int) ($flatInfo['evicted_keys'] ?? 0),
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'rdb_changes' => (int) ($flatInfo['rdb_changes_since_last_save'] ?? 0),
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'rdb_last_save' => (int) ($flatInfo['rdb_last_save_time'] ?? 0),
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];
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}
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/**
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* Display the Redis monitor dashboard.
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*/
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protected function displayDashboard(array $info): void
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{
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$stats = $this->parseRedisInfo($info);
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$currentTime = now()->format('Y-m-d H:i:s');
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// Build the entire output as a single string for atomic write
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$buffer = '';
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// Header
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$buffer .= $this->printHeader("🔴 REDIS MONITOR v{$stats['version']} | {$this->host}:{$this->port}");
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// Server Status
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$buffer .= $this->printSection('Server Status');
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$buffer .= $this->printRow('Status', '● ONLINE', self::GREEN);
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$buffer .= $this->printRow('Role', $stats['role'], self::MAGENTA);
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$buffer .= $this->printRow('Uptime', "{$stats['uptime_days']} days (".$this->formatNumber($stats['uptime_seconds']).' seconds)', self::WHITE);
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$buffer .= $this->printRow('Last Updated', $currentTime, self::GRAY);
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// Memory Usage
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$buffer .= $this->printSection('Memory Usage');
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$buffer .= $this->printRow('Used Memory', $this->formatBytes($stats['used_memory']), self::CYAN);
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$buffer .= $this->printRow('Peak Memory', $this->formatBytes($stats['used_memory_peak']), self::YELLOW);
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$buffer .= $this->printRow('RSS Memory', $this->formatBytes($stats['used_memory_rss']), self::WHITE);
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$buffer .= $this->printRow('Fragmentation Ratio', (string) $stats['mem_fragmentation_ratio'], self::WHITE);
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if ($stats['maxmemory'] > 0) {
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$buffer .= $this->printMeter('Memory Usage', $stats['used_memory'], $stats['maxmemory']);
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}
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// Clients & Connections
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$buffer .= $this->printSection('Clients & Connections');
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$buffer .= $this->printRow('Connected Clients', $this->formatNumber($stats['connected_clients']), self::GREEN);
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$buffer .= $this->printRow('Blocked Clients', $this->formatNumber($stats['blocked_clients']), self::YELLOW);
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$buffer .= $this->printRow('Total Connections', $this->formatNumber($stats['total_connections']), self::WHITE);
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if ($stats['connected_slaves'] > 0) {
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$buffer .= $this->printRow('Connected Slaves', (string) $stats['connected_slaves'], self::MAGENTA);
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}
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// Performance Metrics
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$buffer .= $this->printSection('Performance Metrics');
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$buffer .= $this->printRow('Commands Processed', $this->formatNumber($stats['total_commands']), self::WHITE);
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$buffer .= $this->printRow('Operations/sec', $this->formatNumber($stats['ops_per_sec']).' ops/s', self::GREEN);
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$buffer .= $this->printRow('Network Input', sprintf('%.2f KB/s', $stats['input_kbps']), self::CYAN);
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$buffer .= $this->printRow('Network Output', sprintf('%.2f KB/s', $stats['output_kbps']), self::CYAN);
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// Keyspace Statistics
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$buffer .= $this->printSection('Keyspace Statistics');
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$buffer .= $this->printRow('Total Keys', $this->formatNumber($stats['db_keys']), self::WHITE);
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$buffer .= $this->printRow('Keyspace Hits', $this->formatNumber($stats['keyspace_hits']), self::GREEN);
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$buffer .= $this->printRow('Keyspace Misses', $this->formatNumber($stats['keyspace_misses']), self::RED);
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$buffer .= $this->printRow('Hit Rate', $stats['hit_rate'].'%', self::CYAN);
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$buffer .= $this->printRow('Expired Keys', $this->formatNumber($stats['expired_keys']), self::YELLOW);
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$buffer .= $this->printRow('Evicted Keys', $this->formatNumber($stats['evicted_keys']), self::RED);
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// Persistence
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$buffer .= $this->printSection('Persistence');
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$buffer .= $this->printRow('Changes Since Save', $this->formatNumber($stats['rdb_changes']), self::WHITE);
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if ($stats['rdb_last_save'] > 0) {
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$lastSave = date('Y-m-d H:i:s', $stats['rdb_last_save']);
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$buffer .= $this->printRow('Last Save', $lastSave, self::GRAY);
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}
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$buffer .= $this->printFooter();
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$buffer .= self::DIM." Press Ctrl+C to exit | Refresh: {$this->refreshInterval}s".self::NC.self::CLEAR_EOL."\n";
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// Clear any remaining content below
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$buffer .= "\033[J";
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// Output the entire buffer at once
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echo $buffer;
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}
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/**
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* Display connection error screen.
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*/
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protected function displayConnectionError(): void
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{
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$buffer = '';
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$buffer .= $this->printHeader('⚠ REDIS MONITOR - CONNECTION FAILED');
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$buffer .= $this->printRow('Status', '● OFFLINE - Cannot connect to Redis', self::RED);
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$buffer .= $this->printRow('Host', "{$this->host}:{$this->port}", self::YELLOW);
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$buffer .= $this->printRow('Retrying in', "{$this->refreshInterval} seconds...", self::GRAY);
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$buffer .= $this->printFooter();
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$buffer .= self::DIM." Press Ctrl+C to exit | Refresh: {$this->refreshInterval}s".self::NC.self::CLEAR_EOL."\n";
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$buffer .= "\033[J";
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echo $buffer;
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}
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/**
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* Print dashboard header.
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*/
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protected function printHeader(string $title): string
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{
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// Strip emoji for length calculation (emoji can be multi-byte)
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$titleLen = mb_strlen(preg_replace('/[\x{1F300}-\x{1F9FF}]/u', ' ', $title));
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$padding = max(0, (int) (($this->boxWidth - $titleLen - 2) / 2));
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$line = str_repeat(self::H_LINE, $this->boxWidth);
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$buffer = self::CYAN.self::TL_CORNER.$line.self::TR_CORNER.self::NC.self::CLEAR_EOL."\n";
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$buffer .= self::CYAN.self::V_LINE.self::NC;
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$buffer .= str_repeat(' ', $padding);
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$buffer .= self::BOLD.self::WHITE.$title.self::NC;
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$buffer .= str_repeat(' ', max(0, $this->boxWidth - $padding - $titleLen));
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$buffer .= self::CYAN.self::V_LINE.self::NC.self::CLEAR_EOL."\n";
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$buffer .= self::CYAN.self::T_RIGHT.$line.self::T_LEFT.self::NC.self::CLEAR_EOL."\n";
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return $buffer;
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}
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/**
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* Print section header.
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*/
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protected function printSection(string $title): string
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{
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$remainingWidth = $this->boxWidth - mb_strlen($title) - 5;
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$line = str_repeat(self::H_LINE, max(0, $remainingWidth));
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return self::CYAN.self::T_RIGHT.self::H_LINE.self::H_LINE.self::NC.' '
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.self::YELLOW.self::BOLD.$title.self::NC.' '
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.self::CYAN.$line.self::T_LEFT.self::NC.self::CLEAR_EOL."\n";
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}
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/**
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* Print a data row.
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*/
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protected function printRow(string $label, string $value, string $color = self::WHITE): string
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{
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$labelWidth = 25;
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$valueWidth = $this->boxWidth - $labelWidth - 3;
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$label = str_pad($label, $labelWidth);
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$value = str_pad(mb_substr($value, 0, $valueWidth), $valueWidth);
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return self::CYAN.self::V_LINE.self::NC.' '
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.self::DIM.$label.self::NC.' '
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.$color.$value.self::NC
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.self::CYAN.self::V_LINE.self::NC.self::CLEAR_EOL."\n";
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}
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/**
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* Print a progress meter.
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*/
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protected function printMeter(string $label, int $current, int $max): string
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{
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$labelWidth = 25;
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$meterWidth = min(30, $this->boxWidth - $labelWidth - 10);
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$percentage = $max > 0 ? (int) (($current * 100) / $max) : 0;
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$filled = (int) (($percentage * $meterWidth) / 100);
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$empty = $meterWidth - $filled;
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// Choose color based on percentage
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$color = self::GREEN;
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if ($percentage > 80) {
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$color = self::RED;
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} elseif ($percentage > 60) {
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$color = self::YELLOW;
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}
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$meter = $color.str_repeat('█', $filled).self::GRAY.str_repeat('░', $empty).self::NC;
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$label = str_pad($label, $labelWidth);
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$percentStr = sprintf('%3d%%', $percentage);
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$remainingSpace = $this->boxWidth - $labelWidth - $meterWidth - strlen($percentStr) - 4;
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return self::CYAN.self::V_LINE.self::NC.' '
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.self::DIM.$label.self::NC.' '
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.$meter.' '.self::WHITE.$percentStr.self::NC
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.str_repeat(' ', max(0, $remainingSpace))
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.self::CYAN.self::V_LINE.self::NC.self::CLEAR_EOL."\n";
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}
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/**
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* Print dashboard footer.
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*/
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protected function printFooter(): string
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{
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$line = str_repeat(self::H_LINE, $this->boxWidth);
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return self::CYAN.self::BL_CORNER.$line.self::BR_CORNER.self::NC.self::CLEAR_EOL."\n";
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}
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/**
|
|
* Format bytes into human-readable string.
|
|
*/
|
|
protected function formatBytes(int $bytes): string
|
|
{
|
|
if ($bytes >= 1073741824) {
|
|
return sprintf('%.2f GB', $bytes / 1073741824);
|
|
} elseif ($bytes >= 1048576) {
|
|
return sprintf('%.2f MB', $bytes / 1048576);
|
|
} elseif ($bytes >= 1024) {
|
|
return sprintf('%.2f KB', $bytes / 1024);
|
|
}
|
|
|
|
return $bytes.' B';
|
|
}
|
|
|
|
/**
|
|
* Format number with thousands separators.
|
|
*/
|
|
protected function formatNumber(int $number): string
|
|
{
|
|
return number_format($number);
|
|
}
|
|
|
|
/**
|
|
* Hide terminal cursor.
|
|
*/
|
|
protected function hideCursor(): void
|
|
{
|
|
echo "\033[?25l";
|
|
}
|
|
|
|
/**
|
|
* Show terminal cursor.
|
|
*/
|
|
protected function showCursor(): void
|
|
{
|
|
echo "\033[?25h";
|
|
}
|
|
|
|
/**
|
|
* Move cursor to top-left.
|
|
*/
|
|
protected function moveToTop(): void
|
|
{
|
|
echo "\033[H";
|
|
}
|
|
|
|
/**
|
|
* Clear the screen.
|
|
*/
|
|
protected function clearScreen(): void
|
|
{
|
|
echo "\033[2J\033[H";
|
|
}
|
|
}
|