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如何从docker容器内部连接到机器的本地主机(（31个答案）
上个月关门了。
我有一个python应用程序，它与使用kafka的docker容器一起运行，我也在我的主机上运行kafka，我手动运行kafka，而不是从docker运行。
当我运行python应用程序容器时，它不会从主机连接到kafka，我使用以下命令运行它：

docker run -d --network="host" --name myptm-rating -p 8002:8002 myptm-rating-command

我准备好了 --network 将我的应用程序连接到主机的标志。
这是我的消费者配置（我使用confluent kafka包）：

consumer_conf = {
        'bootstrap.servers': 'localhost:9092',
    }

然后我看到容器日志，它显示错误：

[2020-11-23 04:09:44 +0000] [10] [INFO] Starting gunicorn 20.0.4
[2020-11-23 04:09:44 +0000] [10] [INFO] Listening at: http://0.0.0.0:8002 (10)
[2020-11-23 04:09:44 +0000] [10] [INFO] Using worker: uvicorn.workers.UvicornWorker
[2020-11-23 04:09:44 +0000] [13] [INFO] Booting worker with pid: 13
[2020-11-23 04:09:44 +0000] [14] [INFO] Booting worker with pid: 14
[2020-11-23 04:09:44 +0000] [15] [INFO] Booting worker with pid: 15
%3|1606104584.818|FAIL|rdkafka#producer-1| [thrd:localhost:9092/bootstrap]: localhost:9092/bootstrap: Connect to ipv6#[::1]:9092 failed: Connection refused (after 0ms in state CONNECT)
INFO:src.utils.kafka_client:Start kafka consumer...
%3|1606104584.826|FAIL|rdkafka#producer-1| [thrd:localhost:9092/bootstrap]: localhost:9092/bootstrap: Connect to ipv6#[::1]:9092 failed: Connection refused (after 0ms in state CONNECT)
%3|1606104584.827|FAIL|rdkafka#consumer-2| [thrd:localhost:9092/bootstrap]: localhost:9092/bootstrap: Connect to ipv4#127.0.0.1:9092 failed: Connection refused (after 0ms in state CONNECT)
[2020-11-23 04:09:44 +0000] [13] [INFO] Started server process [13]
[2020-11-23 04:09:44 +0000] [13] [INFO] Waiting for application startup.
[2020-11-23 04:09:44 +0000] [13] [INFO] Application startup complete.
INFO:src.utils.kafka_client:Start kafka consumer...
%3|1606104584.841|FAIL|rdkafka#consumer-2| [thrd:localhost:9092/bootstrap]: localhost:9092/bootstrap: Connect to ipv4#127.0.0.1:9092 failed: Connection refused (after 0ms in state CONNECT)
%3|1606104584.845|FAIL|rdkafka#producer-1| [thrd:localhost:9092/bootstrap]: localhost:9092/bootstrap: Connect to ipv4#127.0.0.1:9092 failed: Connection refused (after 0ms in state CONNECT)
INFO:src.utils.kafka_client:Start kafka consumer...
%3|1606104584.849|FAIL|rdkafka#consumer-2| [thrd:localhost:9092/bootstrap]: localhost:9092/bootstrap: Connect to ipv4#127.0.0.1:9092 failed: Connection refused (after 0ms in state CONNECT)
[2020-11-23 04:09:44 +0000] [14] [INFO] Started server process [14]
[2020-11-23 04:09:44 +0000] [14] [INFO] Waiting for application startup.
[2020-11-23 04:09:44 +0000] [14] [INFO] Application startup complete.
[2020-11-23 04:09:44 +0000] [15] [INFO] Started server process [15]
[2020-11-23 04:09:44 +0000] [15] [INFO] Waiting for application startup.
[2020-11-23 04:09:44 +0000] [15] [INFO] Application startup complete.
%3|1606104585.819|FAIL|rdkafka#producer-1| [thrd:localhost:9092/bootstrap]: localhost:9092/bootstrap: Connect to ipv6#[::1]:9092 failed: Connection refused (after 0ms in state CONNECT, 1 identical error(s) suppressed)