如何在Docker中连接PHP与Redis服务 PHP环境中配置Redis通信方式

version: "3.8"
services:
  redis:
    image: redis:latest
    container_name: redis_server
    ports:
      - "6379:6379"
    networks:
      - app-network

  php:
    build:
      context: .
      dockerfile: Dockerfile
    container_name: php_app
    volumes:
      - ./app:/var/www/html
    ports:
      - "8000:80"
    depends_on:
      - redis
    networks:
      - app-network

networks:
  app-network:
    driver: bridge

FROM php:8.1-apache

RUN apt-get update && apt-get install -y \
    libzip-dev \
    zip \
    unzip \
    && docker-php-ext-install zip

RUN pecl install redis \
    && docker-php-ext-enable redis

WORKDIR /var/www/html

COPY . .

EXPOSE 80

<?php

try {
    $redis = new Redis();
    $redis->connect('redis_server', 6379); // 使用容器名作为主机名

    $redis->set('mykey', 'Hello from PHP!');
    $value = $redis->get('mykey');

    echo "<h1>Redis says: " . htmlspecialchars($value) . "</h1>";

    $redis->close();

} catch (Exception $e) {
    echo "<h1>Could not connect to Redis: " . $e->getMessage() . "</h1>";
}

?>

<?php

$maxRetries = 3;
$retryInterval = 1; // seconds
$redis = null;

for ($attempt = 1; $attempt <= $maxRetries; $attempt++) {
    try {
        $redis = new Redis();
        $redis->connect('redis_server', 6379);
        break; // 连接成功，跳出循环
    } catch (Exception $e) {
        echo "Attempt $attempt failed: " . $e->getMessage() . "\n";
        if ($attempt === $maxRetries) {
            throw $e; // 所有重试都失败，抛出异常
        }
        sleep($retryInterval);
    }
}

if ($redis) {
    // 使用Redis
    $redis->set('mykey', 'Hello after retries!');
    echo $redis->get('mykey');
    $redis->close();
}

?>

docker network create my-custom-network

docker run -d --name redis_server --network my-custom-network redis:latest
docker run -d --name php_app --network my-custom-network -p 8000:80 your_php_image