Docker容器添加新端口映射的方法与详细步骤

在Docker容器已经创建后，需要添加新的端口映射，即对已经存在的Docker容器添加新的端口映射，可以通过以下步骤来添加，即通过修改配置文件的方法。

Windows 10 下 Dockers容器的配置文件修改步骤：

1、先找到要修改的容器hash值：

docker inspect 容器名称

2、然后退出docker Desktop服务

（因为在线状态配置文件修改保存不了）

3、资源管理器中打开最新安装的Docker的配置文件的路径：

\\wsl$\docker-desktop-data\data\docker\containers\[容器hash值] win11一般为： \\wsl.localhost\docker-desktop-data\data\docker\containers\[容器hash值]

4、修改配置文件

打开后修改其中的 config.v2.json 和 hostconfig.json

config.v2.json有两处需要添加，只修改一处，是不行的：

位置1：

"ExposedPorts":{"20/tcp":{},"21/tcp":{},"22/tcp":{},"3306/tcp":{},"443/tcp":{},"6379/tcp":{},"80/tcp":{},"8081/tcp":{},"8082/tcp":{},"8083/tcp":{},"8084/tcp":{},"888/tcp":{},"8888/tcp":{},"9501/tcp":{},"9502/tcp":{}} 

位置2：

"Ports":{"20/tcp":[{"HostIp":"0.0.0.0","HostPort":"1020"}],"21/tcp":[{"HostIp":"0.0.0.0","HostPort":"1021"}],"22/tcp":[{"HostIp":"0.0.0.0","HostPort":"1022"}],"3306/tcp":[{"HostIp":"0.0.0.0","HostPort":"13306"}],"443/tcp":[{"HostIp":"0.0.0.0","HostPort":"10443"}],"6379/tcp":[{"HostIp":"0.0.0.0","HostPort":"16379"}],"80/tcp":null,"8081/tcp":[{"HostIp":"0.0.0.0","HostPort":"8081"}],"8082/tcp":[{"HostIp":"0.0.0.0","HostPort":"8082"}],"8083/tcp":[{"HostIp":"0.0.0.0","HostPort":"8083"}],"8084/tcp":[{"HostIp":"0.0.0.0","HostPort":"8084"}],"888/tcp":[{"HostIp":"0.0.0.0","HostPort":"888"}],"8888/tcp":[{"HostIp":"0.0.0.0","HostPort":"8888"}],"9501/tcp":[{"HostIp":"0.0.0.0","HostPort":"9501"}],"9502/tcp":[{"HostIp":"0.0.0.0","HostPort":"9502"}]} 

hostconfig.json 有一处：

"PortBindings":{"20/tcp":[{"HostIp":"","HostPort":"1020"}],"21/tcp":[{"HostIp":"","HostPort":"1021"}],"22/tcp":[{"HostIp":"","HostPort":"1022"}],"3306/tcp":[{"HostIp":"","HostPort":"13306"}],"443/tcp":[{"HostIp":"","HostPort":"10443"}],"6379/tcp":[{"HostIp":"","HostPort":"16379"}],"8081/tcp":[{"HostIp":"","HostPort":"8081"}],"8082/tcp":[{"HostIp":"","HostPort":"8082"}],"8083/tcp":[{"HostIp":"","HostPort":"8083"}],"8084/tcp":[{"HostIp":"","HostPort":"8084"}],"888/tcp":[{"HostIp":"","HostPort":"888"}],"8888/tcp":[{"HostIp":"","HostPort":"8888"}],"9501/tcp":[{"HostIp":"","HostPort":"9501"}],"9502/tcp":[{"HostIp":"","HostPort":"9502"}]} 

5、启动Docker Desktop服务：

点击容器名称 - 点击 Imspect 即可查看到映射的端口列表

补充知识：如何给运行中的docker容器增加映射端口

命令行操作

#1、查看容器的信息
docker ps -a
#2、查看容器的端口映射情况，在容器外执行：
docker port 容器ID 或者 docker port 容器名称
#3、查找要修改容器的全ID
docker inspect 容器ID |grep Id
#4、进到/var/lib/docker/containers 目录下找到与全 Id 相同的目录，修改 其中的hostconfig.json 和 config.v2.json文件：
#注意：若该容器还在运行中，需要先停掉
docker stop 容器ID 或者 docker stop 容器名称
#再停掉docker服务
systemctl stop docker
#可能会提示错误 Warning: Stopping docker.service, but it can still be activated by:
  docker.socket 不要管他 这是docker在关闭状态下被访问自动唤醒机制，很人性化，即这时再执行任意docker命令会直接启动
#5、修改hostconfig.json如下
#	格式如："{容器内部端口}/tcp":[{"HostIp":"","HostPort":"映射的宿主机端口"}]
"PortBindings":{"22/tcp":[{"HostIp":"","HostPort":"3316"}],"80/tcp":[{"HostIp":"","HostPort":"801"}]}
#6、修改config.v2.json在ExposedPorts中加上要暴露的端口
#	两个地方
"ExposedPorts":{"3306/tcp":{},"80/tcp":{}}"
"Ports":{"3306/tcp":[{"HostIp":"0.0.0.0","HostPort":"33061"}],"80/tcp":[{"HostIp":"","HostPort":"801"}]}"

最后改完之后，重启docker服务就行了

systemctl restart docker

总结 

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