记一次 DockerCompose 配置 22 端口映射遇到的坑

在一次偶然的机会下触发了一个端口映射的bug

配置

docker-compose.yml

version: "3.8"

services:
    machine:
        image: ubuntu:20.04
        container_name: "ubuntu_2004"
        restart: always
        tty: true
        ports:
            - 9500:80
            - 9501:22

乍一看没啥毛病是吧，运行试一下

$ docker-compose up
Creating network "ubuntu2_default" with the default driver
Creating ubuntu_2004 ... error

ERROR: for ubuntu_2004  Cannot create container for service machine: invalid port specification: "570082"

ERROR: for machine  Cannot create container for service machine: invalid port specification: "570082"
ERROR: Encountered errors while bringing up the project.

这就是 22 端口导致的问题，我们把配置文件的端口改为以下写法就可以解决问题了

ports:
    - "9500:80"
    - "9501:22"