php怎么调试接口负载均衡_php接口负载均衡配置与请求分发调试方法

upstream backend_api {
    least_conn;
    server 192.168.1.10:8080 weight=3;
    server 192.168.1.11:8080 weight=2;
    server 192.168.1.12:8080;
    # 可添加 fail_timeout、max_fails 等参数
}
<p>server {
listen 80;
server_name api.example.com;</p><pre class='brush:php;toolbar:false;'>location / {
    proxy_pass http://backend_api;
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}

// 在每个PHP接口文件开头或公共入口处添加
header('X-Backend-Server: ' . gethostname() . '-' . $_SERVER['SERVER_ADDR']);
// 或返回JSON中包含节点信息
echo json_encode([
    'data' => $result,
    'node' => 'server-01', // 根据实际机器命名
    'ip'   => $_SERVER['SERVER_ADDR']
]);

for ($i = 0; $i < 20; $i++) {
    $ch = curl_init('http://api.example.com/user');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HEADER, true);
    $response = curl_exec($ch);
    $header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
    $body = substr($response, $header_size);
    $headers = substr($response, 0, $header_size);
<pre class='brush:php;toolbar:false;'>if (preg_match('/X-Backend-Server: (.+)/', $headers, $m)) {
    echo "Request $i → " . trim($m[1]) . "\n";
}

curl_close($ch);
usleep(100000); // 0.1秒间隔