Question

我正在尝试在macOS上构建Flask / PostgreSQL / SQLAlchemy / Alembic / libpq-dev / psycopg2 Web应用程序。我从未使用过Docker，所以我想尝试一下。我安装了它，并正在执行“入门”步骤。

$ docker --version
Docker version 18.06.0-ce, build 0ffa825

$ docker-compose --version
docker-compose version 1.22.0, build f46880f

$ docker-machine --version
docker-machine version 0.15.0, build b48dc28d

然后我进入第二步：

$ docker run hello-world

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/engine/userguide/

一切都像文档一样工作，但是随后我尝试了下一步，“启动Docker化的Web服务器”，这就是发生的事情...

$ docker run -d -p 80:80 --name webserver nginx
159841d356d8cf6b16fd592b22daa76f3a734a8b35bf24f9f83b3dce6486d49e
docker: Error response from daemon: driver failed programming external connectivity on endpoint webserver (2d93210e398bf70794b706d6e07ca2c2b78297b9f337271710f4c62be8a79b7d): Error starting userland proxy: Bind for 0.0.0.0:80: unexpected error (Failure EADDRINUSE).

因此，我搜索了该错误，并在诸如github和stackoverflow之类的论坛上找到了许多此错误或类似错误的实例。我尝试了所有可以解决的步骤。

sudo netstat -nl -p tcp  | grep 8123
Password:

MyMacName@My-MacBook-Pro ~
$ sudo netstat -nl -p tcp  | head
Active Internet connections
Proto Recv-Q Send-Q  Local Address          Foreign Address        (state)
tcp4       0      0  10.0.0.94.49655        54.174.175.30.443      ESTABLISHED
tcp4       0      0  10.0.0.94.49654        192.30.253.117.443     ESTABLISHED
tcp4       0      0  10.0.0.94.49653        50.16.137.101.443      ESTABLISHED
tcp4       0      0  10.0.0.94.49652        192.30.253.125.443     ESTABLISHED
tcp4       0      0  10.0.0.94.49651        151.101.4.133.443      ESTABLISHED
tcp4       0      0  10.0.0.94.49650        151.101.4.133.443      ESTABLISHED
tcp4       0      0  10.0.0.94.49649        151.101.56.133.443     ESTABLISHED
tcp4       0      0  10.0.0.94.49648        34.238.78.202.443      ESTABLISHED

但是我不知道该怎么做，所以它本身对我没有任何好处。所以我找到了这些步骤并进行了尝试...

$ docker stop $(docker ps -a -q)
2eb7a75a5fd7

$ docker rm $(docker ps -a -q);
2eb7a75a5fd7

$ docker volume rm $(docker volume ls -qf dangling=true)
"docker volume rm" requires at least 1 argument.
See 'docker volume rm --help'.

Usage:  docker volume rm [OPTIONS] VOLUME [VOLUME...]

Remove one or more volumes

$ docker network rm $(docker network ls -q)
Error response from daemon: bridge is a pre-defined network and cannot be removed
Error response from daemon: host is a pre-defined network and cannot be removed
Error response from daemon: none is a pre-defined network and cannot be removed

$ sudo lsof -nP | grep LISTEN
Password:

httpd        97               root    4u     IPv6 0xb250f70d0ca8909d         0t0        TCP *:80 (LISTEN)
mysqld      113             _mysql   19u     IPv6 0xb250f70d0ca8a1dd         0t0        TCP *:3306 (LISTEN)
mysqld      113             _mysql   22u     IPv6 0xb250f70d0ca8a79d         0t0        TCP *:33060 (LISTEN)
awacsd      215               root    8u     IPv6 0xb250f70d0ca8b31d         0t0        TCP [fd24:e01e:118f:e97:75e1:c8cf:5efb:c34c]:4488 (LISTEN)
httpd       234     MyMacName    4u     IPv6 0xb250f70d0ca8909d         0t0        TCP *:80 (LISTEN)
httpd       235     MyMacName    4u     IPv6 0xb250f70d0ca8909d         0t0        TCP *:80 (LISTEN)
httpd       236     MyMacName    4u     IPv6 0xb250f70d0ca8909d         0t0        TCP *:80 (LISTEN)
httpd       237     MyMacName    4u     IPv6 0xb250f70d0ca8909d         0t0        TCP *:80 (LISTEN)
httpd       238     MyMacName    4u     IPv6 0xb250f70d0ca8909d         0t0        TCP *:80 (LISTEN)
rapportd    402     MyMacName    3u     IPv4 0xb250f70d1db86225         0t0        TCP *:58588 (LISTEN)
rapportd    402     MyMacName    4u     IPv6 0xb250f70d0ca8851d         0t0        TCP *:58588 (LISTEN)
postgres    441     MyMacName    5u     IPv6 0xb250f70d0ca8965d         0t0        TCP [::1]:5432 (LISTEN)
postgres    441     MyMacName    6u     IPv6 0xb250f70d0ca8ad5d         0t0        TCP [fe80:1::1]:5432 (LISTEN)
postgres    441     MyMacName    7u     IPv4 0xb250f70d0cf3db85         0t0        TCP 127.0.0.1:5432 (LISTEN)
Adobe\x20   567     MyMacName   13u     IPv4 0xb250f70d1335fe45         0t0        TCP 127.0.0.1:15292 (LISTEN)
Adobe\x20   567     MyMacName  31u     IPv4 0xb250f70d0ecd1225         0t0        TCP 127.0.0.1:15393 (LISTEN)
httpd       744     MyMacName    4u     IPv6 0xb250f70d0ca8909d         0t0        TCP *:80 (LISTEN)
node        746     MyMacName   15u     IPv4 0xb250f70d0e5be225         0t0        TCP 127.0.0.1:49255 (LISTEN)
httpd       748     MyMacName    4u     IPv6 0xb250f70d0ca8909d         0t0        TCP *:80 (LISTEN)
httpd       749     MyMacName   4u     IPv6 0xb250f70d0ca8909d         0t0        TCP *:80 (LISTEN)
cupsd      3415               root    5u     IPv6 0xb250f70d13944e9d         0t0        TCP [::1]:631 (LISTEN)
cupsd      3415               root    6u     IPv4 0xb250f70d16c228c5         0t0        TCP 127.0.0.1:631 (LISTEN)
pgAdmin4   4253     MyMacName  14u     IPv4 0xb250f70d0e7638c5         0t0        TCP 127.0.0.1:54792 (LISTEN)

不幸的是，我也不知道这意味着什么。我认为问题可能在于最后一行显示PostgreSQL的PgAdmin4正在运行。因此进入Utility Monitor并强制退出。仍然有5-6个“ postgres”实例由于某种原因我无法强制退出。这一定与我的Mac附带某种postgres有关。

我在这里粘贴的任何内容是否可以帮助认识Docker的人诊断出我可以做些什么来克服这个问题？

Answer 1

我遇到了同样的问题，但是docker restart并没有帮助。因此，我启动了Kitematic并打开了我的postgres容器的设置，然后再次将配置的端口更改为 localhost：5432 。现在对我有用。

或使用以下命令：

docker stop postgres
docker commit postgres postgres2
docker run -p 54320:5432 -td postgres2

Answer 2

$ docker run -d -p 80:80 --name webserver nginx
159841d356d8cf6b16fd592b22daa76f3a734a8b35bf24f9f83b3dce6486d49e
docker: Error response from daemon: driver failed programming external connectivity on endpoint webserver (2d93210e398bf70794b706d6e07ca2c2b78297b9f337271710f4c62be8a79b7d): Error starting userland proxy: Bind for 0.0.0.0:80: unexpected error (Failure EADDRINUSE).

您可以docker -d -p [another_host_port]：80-命名网络服务器nginx将其绑定到另一个端口而不是80，我认为还有另一个应用程序或实例正在使用您找不到的端口80。

Docker端口绑定语法：host:guest。（https://docs.docker.com/engine/reference/run/#expose-incoming-ports）

nginx在Docker实例中运行并公开80本身，因此我们将nginx的80（来宾）映射到所需的端口（主机），然后通过该端口访问应用程序。

首次尝试使用Docker：来自守护程序的错误响应：驱动程序无法对端点Web服务器（2d9）上的外部连接进行编程

2 个答案: