Docker-用springboot和redis创作

Question

    java-service_1  | 2020-11-20 10:30:54.053 ERROR 1 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.data.redis.RedisConnectionFailureException: Cannot get Jedis connection; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool] with root cause
java-service_1  | 
java-service_1  | java.net.ConnectException: Connection refused (Connection refused)
java-service_1  |       at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_252]
java-service_1  |       at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_252]
java-service_1  |       at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_252]
java-service_1  |       at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_252]
java-service_1  |       at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_252]
java-service_1  |       at java.net.Socket.connect(Socket.java:607) ~[na:1.8.0_252]
java-service_1  |       at redis.clients.jedis.DefaultJedisSocketFactory.createSocket(DefaultJedisSocketFactory.java:53) ~[jedis-3.3.0.jar!/:na]
java-service_1  |       at redis.clients.jedis.Connection.connect(Connection.java:158) ~[jedis-3.3.0.jar!/:na]
java-service_1  |       at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:109) ~[jedis-3.3.0.jar!/:na]

@Bean
public RedisStandaloneConfiguration redisStandaloneConfiguration() {
    System.out.println("connecting with redis");
    RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration("redis", 6379);
    return redisStandaloneConfiguration;
}

@Bean
public ClientOptions clientOptions() {
    return ClientOptions.builder()
            .disconnectedBehavior(ClientOptions.DisconnectedBehavior.REJECT_COMMANDS)
            .autoReconnect(true)
            .build();
}

@Bean
public RedisConnectionFactory connectionFactory(RedisStandaloneConfiguration redisStandaloneConfiguration) {

    LettuceClientConfiguration configuration = LettuceClientConfiguration.builder()
            .clientOptions(clientOptions()).build();

    return new LettuceConnectionFactory(redisStandaloneConfiguration, configuration);
}

@Bean
@ConditionalOnMissingBean(name = "redisTemplate")
@Primary
public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
    StringRedisTemplate template = new StringRedisTemplate();
    template.setConnectionFactory(redisConnectionFactory);
    return template;
}

Answer 1

我认为出现问题是因为您的应用程序无法连接到DB，因为

RedisStandaloneConfiguration redisStandaloneConfiguration 
                                    = new RedisStandaloneConfiguration("redis", 6379);

现在，您使用redis作为主机名，这是不正确的。您应该使用容器名称作为主机，并确保两个容器位于同一网络上。

为了使其工作，您可以执行以下操作：

docker-compose.yml

version: '3'
services:
  redis-server:
    container_name: redis
    image: 'redis'
    ports:
      - "6379:6379"
  java-service:
    build: .
    links:
      - redis-server
    ports:
      - "8080:8080"

现在，同一网络上的其他容器将能够使用redis作为主机名与redis通信。

或

version: '3'
services:
  redis-server:
    hostname: redis
    image: 'redis'
    ports:
      - "6379:6379"
  java-service:
    build: .
    links:
      - redis-server
    ports:
      - "8080:8080"