refactor: consolidate metric collection into single SSH calls and add support for SSH key authentication
This commit is contained in:
infosave2007
+14
-2
@@ -25,15 +25,27 @@ ini_set('display_errors', 1);
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ini_set('log_errors', 1);
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ini_set('error_log', '/var/log/metrics_collector_errors.log');
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// Prevent multiple instances using flock (#42)
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$lockFile = '/var/run/collect_metrics.lock';
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$lockFp = fopen($lockFile, 'w');
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if (!$lockFp || !flock($lockFp, LOCK_EX | LOCK_NB)) {
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echo "[" . date('Y-m-d H:i:s') . "] Another collector instance is already running. Exiting.\n";
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exit(0);
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}
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// Write PID file for monitoring
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$pidFile = '/var/run/collect_metrics.pid';
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file_put_contents($pidFile, getmypid());
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// Register shutdown function to clean up PID file
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register_shutdown_function(function() use ($pidFile) {
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// Register shutdown function to clean up PID and lock files
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register_shutdown_function(function() use ($pidFile, $lockFp, $lockFile) {
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if (file_exists($pidFile)) {
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unlink($pidFile);
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}
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if ($lockFp) {
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flock($lockFp, LOCK_UN);
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fclose($lockFp);
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}
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});
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echo "[" . date('Y-m-d H:i:s') . "] Metrics collector started (PID: " . getmypid() . ")\n";
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Regular → Executable
+15
@@ -2,15 +2,24 @@
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# Monitor and restart metrics collector if it's not running
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# This script checks if collect_metrics.php is running and restarts it if needed
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# Uses flock to prevent multiple instances (#42)
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SCRIPT_PATH="/var/www/html/bin/collect_metrics.php"
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LOG_FILE="/var/log/metrics_monitor.log"
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PID_FILE="/var/run/collect_metrics.pid"
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LOCK_FILE="/var/run/collect_metrics.lock"
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log_message() {
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" >> "$LOG_FILE"
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}
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# Use flock to prevent multiple monitor instances
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exec 200>"$LOCK_FILE"
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if ! flock -n 200; then
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log_message "Another monitor instance is running, exiting"
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exit 0
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fi
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# Check if the process is running
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is_running() {
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if [ -f "$PID_FILE" ]; then
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@@ -22,6 +31,12 @@ is_running() {
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fi
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fi
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fi
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# Also check if any collect_metrics.php is running (catches orphan processes)
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if pgrep -f "collect_metrics.php" > /dev/null 2>&1; then
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# Update PID file with actual PID
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pgrep -f "collect_metrics.php" | head -1 > "$PID_FILE"
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return 0
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fi
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return 1
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}
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+155
-133
@@ -83,17 +83,120 @@ class ServerMonitoring
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/**
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* Collect all server metrics
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* Uses a single SSH call to minimize connections (#42)
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*/
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public function collectMetrics(): array
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{
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// Combine all metric commands into one SSH call
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$combinedCmd = implode(' && ', [
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"echo CPU_START",
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"top -bn1 | grep 'Cpu(s)' | sed 's/.*, *\\([0-9.]*\\)%* id.*/\\1/' | awk '{print 100 - \$1}'",
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"echo RAM_START",
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"free -m | grep Mem | awk '{print \$3, \$2}'",
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"echo DISK_START",
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"df -BG / | tail -1 | awk '{gsub(/G/,\"\"); print \$3, \$2}'",
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"echo NET_RX_START",
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"cat /sys/class/net/\$(ip route | grep default | awk '{print \$5}' | head -1)/statistics/rx_bytes",
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"echo NET_TX_START",
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"cat /sys/class/net/\$(ip route | grep default | awk '{print \$5}' | head -1)/statistics/tx_bytes",
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]);
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$result1 = $this->execSSH($combinedCmd);
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// Parse first batch
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$cpu = null;
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$ramUsed = null;
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$ramTotal = null;
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$diskUsed = null;
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$diskTotal = null;
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$rxBytes1 = null;
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$txBytes1 = null;
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if ($result1) {
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$lines = explode("\n", trim($result1));
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$section = '';
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foreach ($lines as $line) {
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$line = trim($line);
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if ($line === 'CPU_START') { $section = 'cpu'; continue; }
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if ($line === 'RAM_START') { $section = 'ram'; continue; }
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if ($line === 'DISK_START') { $section = 'disk'; continue; }
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if ($line === 'NET_RX_START') { $section = 'rx'; continue; }
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if ($line === 'NET_TX_START') { $section = 'tx'; continue; }
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switch ($section) {
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case 'cpu':
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$cpu = (float) $line;
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$section = '';
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break;
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case 'ram':
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$parts = preg_split('/\s+/', $line);
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if (count($parts) >= 2) {
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$ramUsed = (int) $parts[0];
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$ramTotal = (int) $parts[1];
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}
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$section = '';
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break;
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case 'disk':
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$parts = preg_split('/\s+/', $line);
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if (count($parts) >= 2) {
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$diskUsed = (float) $parts[0];
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$diskTotal = (float) $parts[1];
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}
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$section = '';
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break;
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case 'rx':
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$rxBytes1 = (int) $line;
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$section = '';
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break;
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case 'tx':
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$txBytes1 = (int) $line;
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$section = '';
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break;
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}
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}
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}
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// Second SSH call after 1 second for network speed (only if first succeeded)
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$rxMbps = null;
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$txMbps = null;
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if ($rxBytes1 !== null && $txBytes1 !== null) {
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sleep(1);
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$netCmd = implode(' && ', [
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"echo RX",
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"cat /sys/class/net/\$(ip route | grep default | awk '{print \$5}' | head -1)/statistics/rx_bytes",
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"echo TX",
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"cat /sys/class/net/\$(ip route | grep default | awk '{print \$5}' | head -1)/statistics/tx_bytes",
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]);
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$result2 = $this->execSSH($netCmd);
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if ($result2) {
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$lines = explode("\n", trim($result2));
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$section = '';
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$rxBytes2 = null;
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$txBytes2 = null;
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foreach ($lines as $line) {
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$line = trim($line);
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if ($line === 'RX') { $section = 'rx'; continue; }
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if ($line === 'TX') { $section = 'tx'; continue; }
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if ($section === 'rx') { $rxBytes2 = (int) $line; $section = ''; }
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if ($section === 'tx') { $txBytes2 = (int) $line; $section = ''; }
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}
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if ($rxBytes2 !== null) {
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$rxMbps = round((($rxBytes2 - $rxBytes1) * 8) / 1000000, 2);
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}
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if ($txBytes2 !== null) {
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$txMbps = round((($txBytes2 - $txBytes1) * 8) / 1000000, 2);
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}
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}
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}
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$metrics = [
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'cpu_percent' => $this->getCpuUsage(),
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'ram_used_mb' => $this->getRamUsed(),
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'ram_total_mb' => $this->getRamTotal(),
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'disk_used_gb' => $this->getDiskUsed(),
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'disk_total_gb' => $this->getDiskTotal(),
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'network_rx_mbps' => $this->getNetworkRxSpeed(),
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'network_tx_mbps' => $this->getNetworkTxSpeed(),
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'cpu_percent' => $cpu,
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'ram_used_mb' => $ramUsed,
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'ram_total_mb' => $ramTotal,
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'disk_used_gb' => $diskUsed,
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'disk_total_gb' => $diskTotal,
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'network_rx_mbps' => $rxMbps,
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'network_tx_mbps' => $txMbps,
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];
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$this->saveServerMetrics($metrics);
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@@ -116,11 +219,10 @@ class ServerMonitoring
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}
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// Pre-fetch X-ray stats only for Xray servers.
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// Otherwise we block AWG/WireGuard stats collection with irrelevant Xray errors.
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if ($this->isXrayServer()) {
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if (!$this->fetchXrayStats()) {
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error_log("Failed to fetch X-ray stats, preventing DB overwrite");
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return []; // Abort only for Xray servers
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return [];
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}
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}
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@@ -140,12 +242,6 @@ class ServerMonitoring
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$stats = $this->getClientStats($client);
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if ($stats) {
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// Check if speed values are excessively high (spike detection)
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// Use 10Gbps (1250 MB/s) as sanity limit. 1250 * 1024 * 1024 ~ 1.3e9
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// Actually ServerMonitoring calculates bytes/sec.
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// If speed is > 2 Gbit/s likely an error (unless on 10G link, but rare)
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// Let's rely on simple positive check for now.
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$this->saveClientMetrics($client['id'], $stats);
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$results[] = [
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'client_id' => $client['id'],
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@@ -159,113 +255,6 @@ class ServerMonitoring
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return $results;
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}
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/**
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* Get CPU usage percentage
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*/
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private function getCpuUsage(): ?float
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{
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$cmd = "top -bn1 | grep 'Cpu(s)' | sed 's/.*, *\\([0-9.]*\\)%* id.*/\\1/' | awk '{print 100 - \$1}'";
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$result = $this->execSSH($cmd);
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return $result ? (float) trim($result) : null;
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}
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/**
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* Get RAM used in MB
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*/
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private function getRamUsed(): ?int
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{
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$cmd = "free -m | grep Mem | awk '{print \$3}'";
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$result = $this->execSSH($cmd);
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return $result ? (int) trim($result) : null;
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}
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/**
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* Get total RAM in MB
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*/
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private function getRamTotal(): ?int
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{
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$cmd = "free -m | grep Mem | awk '{print \$2}'";
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$result = $this->execSSH($cmd);
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return $result ? (int) trim($result) : null;
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}
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/**
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* Get disk used in GB
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*/
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private function getDiskUsed(): ?float
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{
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$cmd = "df -BG / | tail -1 | awk '{print \$3}' | sed 's/G//'";
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$result = $this->execSSH($cmd);
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return $result ? (float) trim($result) : null;
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}
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/**
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* Get total disk in GB
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*/
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private function getDiskTotal(): ?float
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{
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$cmd = "df -BG / | tail -1 | awk '{print \$2}' | sed 's/G//'";
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$result = $this->execSSH($cmd);
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return $result ? (float) trim($result) : null;
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}
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/**
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* Get network RX speed in Mbps
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*/
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private function getNetworkRxSpeed(): ?float
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{
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// Get bytes received on main interface
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$cmd = "cat /sys/class/net/\$(ip route | grep default | awk '{print \$5}' | head -1)/statistics/rx_bytes";
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$bytes1 = $this->execSSH($cmd);
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if (!$bytes1)
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return null;
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sleep(1); // Wait 1 second
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$bytes2 = $this->execSSH($cmd);
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if (!$bytes2)
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return null;
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// Calculate speed in Mbps
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$bytesPerSec = (int) $bytes2 - (int) $bytes1;
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$mbps = ($bytesPerSec * 8) / 1000000;
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return round($mbps, 2);
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}
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/**
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* Get network TX speed in Mbps
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*/
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private function getNetworkTxSpeed(): ?float
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{
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// Get bytes transmitted on main interface
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$cmd = "cat /sys/class/net/\$(ip route | grep default | awk '{print \$5}' | head -1)/statistics/tx_bytes";
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$bytes1 = $this->execSSH($cmd);
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if (!$bytes1)
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return null;
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sleep(1); // Wait 1 second
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$bytes2 = $this->execSSH($cmd);
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if (!$bytes2)
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return null;
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// Calculate speed in Mbps
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$bytesPerSec = (int) $bytes2 - (int) $bytes1;
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$mbps = ($bytesPerSec * 8) / 1000000;
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return round($mbps, 2);
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}
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/**
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* Get client current stats and calculate speed
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*/
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@@ -629,27 +618,60 @@ class ServerMonitoring
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/**
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* Execute SSH command on server
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* Supports both password and SSH key authentication
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*/
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private function execSSH(string $cmd): ?string
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{
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$host = $this->serverData['host'];
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$port = (int)$this->serverData['port'];
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$username = $this->serverData['username'];
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$password = $this->serverData['password'];
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$sshKey = $this->serverData['ssh_key'] ?? '';
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$password = $this->serverData['password'] ?? '';
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$sshOptions = '-o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null';
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$sshCmd = sprintf(
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"sshpass -p '%s' ssh -p %d %s %s@%s %s 2>/dev/null",
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$password,
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$port,
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$sshOptions,
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$username,
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$host,
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escapeshellarg($cmd)
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);
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$sshOptions = '-o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ConnectTimeout=10 -o LogLevel=ERROR';
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$keyFile = '';
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if (!empty($sshKey)) {
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// SSH key authentication
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$keyFile = tempnam(sys_get_temp_dir(), 'sshkey');
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// Normalize key (fix \r\n, ensure trailing newline)
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$sshKey = str_replace("\r\n", "\n", $sshKey);
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$sshKey = str_replace("\r", "\n", $sshKey);
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if ($sshKey !== '' && substr($sshKey, -1) !== "\n") {
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$sshKey .= "\n";
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}
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file_put_contents($keyFile, $sshKey);
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chmod($keyFile, 0600);
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$sshOptions .= " -i {$keyFile} -o IdentitiesOnly=yes -o PubkeyAuthentication=yes -o PreferredAuthentications=publickey";
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$sshCmd = sprintf(
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"ssh -p %d %s %s@%s %s 2>/dev/null",
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$port,
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$sshOptions,
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$username,
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$host,
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escapeshellarg($cmd)
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);
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} else {
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// Password authentication
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$sshOptions .= " -o PreferredAuthentications=password -o PubkeyAuthentication=no";
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$sshCmd = sprintf(
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"sshpass -p '%s' ssh -p %d %s %s@%s %s 2>/dev/null",
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$password,
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$port,
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$sshOptions,
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$username,
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$host,
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escapeshellarg($cmd)
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);
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}
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$output = shell_exec($sshCmd);
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// Clean up temp key file
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if ($keyFile && file_exists($keyFile)) {
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unlink($keyFile);
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}
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return $output ?: null;
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}
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Block a user