jedis 无法连接到 redis docker 实例 - 连接被拒绝（连接被拒绝）

Question

按照 url链接中的建议在本地运行 redis docker 映像， 从日志中可以看出该映像运行良好

docker pull redis
docker run --name some-redis -d redis

然后docker启动。我可以看到如下日志

docker logs --follow some-redis
1:C 08 Jul 2021 07:17:51.243 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
1:C 08 Jul 2021 07:17:51.243 # Redis version=6.2.4, bits=64, commit=00000000, modified=0, pid=1, just started
1:C 08 Jul 2021 07:17:51.243 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /path/to/redis.conf
1:M 08 Jul 2021 07:17:51.244 * monotonic clock: POSIX clock_gettime
1:M 08 Jul 2021 07:17:51.247 * Running mode=standalone, port=6379.
1:M 08 Jul 2021 07:17:51.248 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
1:M 08 Jul 2021 07:17:51.248 # Server initialized
1:M 08 Jul 2021 07:17:51.250 * Ready to accept connections

我正在使用 jedis 连接到此 redis 容器，此代码和 redis docker 都在本地计算机中。下面的代码不在容器上，而是在本地主机上。redis已经暴露了6379端口redis dockerfile链接

public static void main(String [] args) {
    System.out.println("connecting");
    Jedis jedis;
    jedis = new Jedis("localhost",6379);
    System.out.println("connected and pinging now");
    //jedis.ping();
    jedis.set("events/city/rome", "32,15,223,828");  //line 274
    String cachedResponse = jedis.get("events/city/rome");
    System.out.println("ping done");
}

我连接时出错

    connecting
connected and pinging now
Exception in thread "main" redis.clients.jedis.exceptions.JedisConnectionException: java.net.ConnectException: Connection refused (Connection refused)
    at redis.clients.jedis.Connection.connect(Connection.java:164)
    at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:80)
    at redis.clients.jedis.Connection.sendCommand(Connection.java:100)
    at redis.clients.jedis.BinaryClient.set(BinaryClient.java:97)
    at redis.clients.jedis.Client.set(Client.java:32)
    at redis.clients.jedis.Jedis.set(Jedis.java:68)
    at com.org.app.module.TaskPerformer.main(TaskPerformer.java:274)
Caused by: java.net.ConnectException: Connection refused (Connection refused)
    at java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:606)
    at redis.clients.jedis.Connection.connect(Connection.java:158)
    ... 6 more

jedis.ping()此错误也发生在第 273 行

Answer 1

您应该通过明确提及端口或使用主机网络将 Redis 端口 (TCP 6379) 发布到主机系统。

以下是仅发布 TCP 端口 6379 的方法（推荐解决方案）：

docker run --rm -p 6379:6379 redis

以下是如何使用网络主机（这对于您的简单情况来说似乎有点过分，并且可能会暴露出进一步的安全风险）：

docker run --rm --network host redis