Docker无法访问容器外部的端口

Question

I am running zookeeper( not thru docker ) on my localhost with port 2181. 我正在本地主机上使用端口2181运行zookeeper（不是通过docker）。

Also, trying to run a docker image thru docker compose as follows. 另外，尝试通过docker compose运行docker镜像，如下所示。

#
  # Mesos
  #
  mesos-master:
    image: mesosphere/mesos-master:1.0.3
    restart: always
    privileged: true
    network_mode: host
    volumes:
      - ~/mesos-data/master:/tmp/mesos
    environment:
      MESOS_CLUSTER: "mesos-cluster"
      MESOS_QUORUM: "1"
      MESOS_ZK: "zk://localhost:2181/mesos"
      MESOS_PORT: 5000
      MESOS_REGISTRY_FETCH_TIMEOUT: "2mins"
      MESOS_EXECUTOR_REGISTRATION_TIMEOUT: "2mins"
      MESOS_LOGGING_LEVEL: INFO
      MESOS_INITIALIZE_DRIVER_LOGGING: "false"

Zookeepr is listening on port 2181, but still my docker process is unable to connect to the zookeeper port 2181. Zookeepr正在侦听端口2181，但是我的docker进程仍然无法连接到zookeeper端口2181。

Is there anything missing? 缺少什么吗？

Thanks 谢谢

Answer 1

You are pointing to localhost from inside your docker container. 您是从docker容器内部指向localhost 。 This means that your docker container tries to connect to the container itself (localhost) on that specific port and NOT on the localhost of your server. 这意味着您的Docker容器尝试在该特定端口上而不是在服务器的localhost上连接到容器本身（localhost）。 You'll need to specify a specific IP to connect or you can run your docker container with the --net="host" option. 您需要指定要连接的特定IP，或者可以使用--net="host"选项运行--net="host"容器。

$ docker run -d --net="host" ...

This will create your container inside the host network and not inside the default bridge network. 这将在主机网络内部而不是默认桥接网络内部创建容器。

Example: I create a apache container (default) and map port on 127.0.0.1:80 of the host. 示例：我创建一个apache容器（默认）并在主机的127.0.0.1:80上映射端口。 So on my server I can curl 127.0.0.1:80 . 所以在我的服务器上我可以卷曲127.0.0.1:80 。

$ docker run -d -p 80:80 httpd

curl 127.0.0.1:80 from host works: 从主机作品中curl 127.0.0.1:80 ：

$ curl localhost:80
<html><body><h1>It works!</h1></body></html>

If I start a help container with curl installed in which I will curl 127.0.0.1:80 : 如果我启动安装了curl的帮助容器，那么它将卷曲127.0.0.1:80 ：

    $ docker run --rm tutum/curl /bin/bash -c 'curl 127.0.0.1:80'
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0curl: (7) Failed to connect to 127.0.0.1 port 80: Connection refused

Connection is refused because the container is inside the default bridge network and tries to curl itself on port 80. 连接被拒绝，因为该容器位于默认网桥网络内，并尝试在端口80上卷曲自身。

Now I start the container inside the host network: 现在，我在host网络中启动容器：

$ docker run --net=host --rm tutum/curl /bin/bash -c 'curl 127.0.0.1:80'
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100    45  100    45    0     0   8573      0 --:--:-- --:--:-- --:--:-- 22500
<html><body><h1>It works!</h1></body></html>

The --net=host translated to your docker-compose file means you have to add network_mode: host --net=host转换为--net=host -compose文件意味着您必须添加network_mode: host

Docker无法访问容器外部的端口

问题描述

1 个解决方案

解决方案1
6 2017-08-17 07:25:24

Docker无法访问容器外部的端口

问题描述

1 个解决方案

解决方案1 6 2017-08-17 07:25:24

解决方案1
6 2017-08-17 07:25:24