Docker端口在容器和主机之间转发 [英] Docker port forwarding between container and host

问题描述

我在码头上是新的，我正在尝试一些东西。从 docs ，我看到我们可以映射容器和主机之间的端口。

所以我拉 mariadb repo并运行这样的容器

  $ docker run -p 127.0.0.1:3307:3306 --name mdb -e MYSQL_ROOT_PASSWORD = docker -d mariadb 
  

这将将容器内的端口3306绑定到主机上的localhost或127.0.0.1接口上的端口3307。

它创建容器，我检查它与 $ docker ps

  CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 
 f7d30562194c mariadb/ docker-entrypoint。大约一个小时前Up 6分钟127.0.0.1:3307 - > 3306 / tcp mdb 
  

但是当我telnet到港口，我没有什么

  $ telnet 127.0.0.1 3307 
尝试127.0.0.1 ... 
 telnet：连接到地址127.0.0.1：连接拒绝
 telnet：无法连接到远程主机
  

我正在做这件事，因为我在3306端口中运行了一个 mysql ，我不想混淆。我尝试在 -p 选项切换订单，telnet上也没有。你可以帮我看看我在做什么错吗？

（另外我正在运行 boot2docker OSX 10.9.5 ）

解决方案

基本问题是，如果你要使用 boot2docker ，您需要在boot2docker VM上找到localhost，而不是Mac。

问题清楚，这应该工作：

  $ boot2docker ssh 
 ... 
 $ docker run -p 127.0.0.1:3307:3306 --name mdb -e MYSQL_ROOT_PASSWORD = docker -d mariadb 
 ... 
 $ telnet 127.0.0.1 3307 
  

但显然你不想每次都进入虚拟机。所以我将用boot2docker VM的IP替换127.0.0.1，你完成了：

  $ telnet $（boot2docker ip）3307 
  

I'm new at docker and I'm trying to test some things. From the docs I saw that we can map ports between the container and the host.

So I pull the mariadb repo and run a container like this

$ docker run -p 127.0.0.1:3307:3306 --name mdb -e MYSQL_ROOT_PASSWORD=docker -d mariadb

This would bind port 3306 inside the container to port 3307 on the localhost or 127.0.0.1 interface on the host machine.

And It creates the container, I check it with $ docker ps

CONTAINER ID        IMAGE               COMMAND                CREATED             STATUS              PORTS                      NAMES
f7d30562194c        mariadb             "/docker-entrypoint.   About an hour ago   Up 6 minutes        127.0.0.1:3307->3306/tcp   mdb

But when I telnet to the port, I got nothing

$ telnet 127.0.0.1 3307
Trying 127.0.0.1...
telnet: connect to address 127.0.0.1: Connection refused
telnet: Unable to connect to remote host

I'm doing this becouse I've got a mysql running in the 3306 port, and I don't want to mess with that. I try switching the orders on the -p option and also nothing on the telnet. Can you help me to see what I'm doing wrong?

(Also I'm running over boot2docker on OSX 10.9.5)

解决方案

The basic problem is that if you're using boot2docker, you need to address localhost on the boot2docker VM, not the Mac.

To make the problem clear, this should work:

$ boot2docker ssh
...
$ docker run -p 127.0.0.1:3307:3306 --name mdb -e MYSQL_ROOT_PASSWORD=docker -d mariadb
...
$ telnet 127.0.0.1 3307

But obviously you don't want to ssh into the VM each time. So I would just replace 127.0.0.1 with the IP of the boot2docker VM and you're done:

$ telnet $(boot2docker ip) 3307

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